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DIVISION RESIDENTIAL CODE Sec Residential Construction

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					DIVISION 8. RESIDENTIAL CODE
Sec. 14-291. Residential Construction Code. With the following additions, deletions,
and revisions, the International Residential Code for One- and Two-Family Dwellings,
2003 Edition, a copy of which, authenticated by the signatures of the Mayor and City
Secretary, made public record by this Section, and on file in the City Secretary's office,
is incorporated by reference and adopted as the Residential Construction Code for the
City of Corpus Christi:
(1) CHAPTER 1, ADMINISTRATION, of the International Residential Code for One- and
Two-Family Dwellings is deleted. Sections of this article contains the administrative
rules for the administration of the Residential Construction Code and the other
Technical Construction Codes of the City of Corpus Christi, including the Building Code,
Electrical Code, Energy Conservation Code, Fuel Gas Code, Mechanical Code, and
Plumbing Code.
                             CHAPTER 2 – DEFINITIONS
(2) Section R202 of the International Residential Code for One- and Two-Family
Dwellings is amended by adding definitions for the terms “backflow prevention assembly
tester” and “open structure” to read as follows:
SECTION R202 DEFINITIONS
      Backflow prevention assembly tester. A backflow prevention assembly tester is
      an individual licensed by the Texas Commission on Environmental Quality under
      30 TAC 30.51 – 30.62.
      Open-structure. A structure or open appurtenance to a structure that has no
      enclosing or confining barriers for at least fifty (50) percent of its perimeter, i.e.
      the perimeter walls (floor to ceiling) on two sides of the structure or appurtenance
      permit the unobstructed flow of natural environmental air.
                        CHAPTER 3 – BUILDING PLANNING
(3) Section R301.2.1.1 of the International Residential Code for One- and Two-Family
Dwellings is revised to read as follows:
R301.2.1.1 Design criteria. Construction in regions where the basic wind speeds from
Figure RR301.2(4) equal or exceed 110 miles per hour (177.1 km/h) shall be designed
in accordance with one of the following:
      1. American Forest and Paper Association (AF & PA) Wood Frame Construction
         Manual for One-and Two-Family Dwellings (WFCM), 2001 Edition; or
      2. Southern Building Code Congress International Standard for Hurricane
         Resistant Residential Construction (SSTD 10); or
      3. Minimum Design Loads for Buildings and Other Structures (ASCE-7); or
      4. American Iron and Steel Institute (AISI), Standard for Cold-Formed Steel
         Framing – Prescriptive Method for One- and Two-family Dwellings
         (COFS/PM).
      5. Concrete construction shall be designed in accordance with the provisions of
         this code.
(4) Section R301.2.1.2 of the International Residential Code for One- and Two-Family
Dwellings is revised to read as follows:
R301.2.1.2 Protection from windborne debris. Protection from windborne debris
must be provided as follows:
      R301.2.1.2.1 General Requirements
             1. For structures located in the Inland I and Seaward areas as adopted by
                the Texas Department of Insurance, products for exterior openings
                must either be manufactured to resist windborne debris or must be
                protected from windborne debris with an impact protective system.
             2. Products for exterior openings must include exterior windows, exterior
                doors, garage doors, and skylights and impact protective systems.
             3. Impact protective systems may include permanently mounted shutters,
                removable shutters, or other types of protective systems.
             4. Section R301.2.1.2.3 specifies requirements for impact protective
                systems that are manufactured to protect products for exterior
                openings that are not windborne debris resistant.
             5. Section R301.2.1.2.4 specifies requirements for exterior opening
                products that are manufactured to resist windborne debris.
      R301.2.1.2.2. Impact and Cyclic Wind Pressure Criteria. Impact protective
      systems and exterior opening products must be tested for windborne debris
      resistance under ASTM E 1886 and ASTM E 1996 or other windborne debris
      standards or procedures that are recognized by the Texas Department of
      Insurance. The missile criteria must be as follows:
             1. Products located within 30 feet of grade must be tested to resist a
                large, and if required small missile. If ASTM E 1996 is the test
                standard used, then missile level D from Table 2, Applicable Missiles,
                must be used.
             2. Products located above 30 feet of grade must be tested to resist a
                small missile. If ASTM E 1996 is the test standard used, then missile
                level D from Table 2, Applicable Missiles, must be used.
      R301.2.1.2.3. Impact Protective Systems. Impact protective systems must be
      installed under the manufacturer’s installation instructions and in the manner in
      which they were tested for uniform static wind pressure resistance and for
      windborne debris resistance.
      R301.2.1.2.4. Exterior Opening Products.
             1. If the exterior opening products are not protected from windborne
                debris by an impact protective system, then they must be
                manufactured to resist windborne debris under Sections R301.2.1.2.1.
                and R301.2.1.2.2.
             2. Exterior opening products must be installed under the manufacturer’s
                installation instructions and under the manner in which they were
                tested for uniform static wind pressure resistance and for windborne
                debris resistance.
      R301.2.1.2.5. Protection from windborne debris using wood structural
      panels. Protection from windborne debris using wood structural panels is
      permitted. The methodology used must comply with the requirements specified
      in Sections R301.2.1.2.2. and R301.2.1.2.3.
(5) Section R301.2.1 of the International Residential Code for One- and Two-Family
Dwellings is amended by adding a new subsection R301.2.1.5 to read as follows:
R301.2.1 Wind limitations.
      R301.2.1.5 Structures to be included in the Texas Windstorm Insurance
      Association’s program for Windstorm Resistant Construction.
             R301.2.1.5.1. All structures within the City are required to be designed
             and constructed under the Texas Engineering Practice Act and must be
             designed and constructed under this code as adopted and amended by
             the Texas Department of Insurance.
             R301.2.1.5.2. The structure must be inspected by a Texas registered
             professional engineer appointed by the Texas Department of Insurance,
             by an inspector employed by the Texas Department of Insurance, or a
             municipal inspector approved by the Commissioner of Insurance. Until the
             Building Official and municipal inspectors are approved as inspectors by
             the Commissioner of Insurance, the Building Official and building
             inspectors employed by the City will not certify compliance with this code
             for compliance with the Texas Windstorm Insurance Association’s
             program for windstorm resistant construction.
             R301.2.1.5.3. Compliance with the TWIA program for windstorm resistant
             construction must be substantiated by the presentation of a Form WPI-1
             enrollment form, a Form WPI-2 Inspection form, or a Form WPI-8
             Certificate form from the Texas Department of Insurance.
(6) Section R308.5 of the International Residential Code for One- and Two-Family
Dwellings is revised to read as follows:
R308.5 Site built windows. Site built windows are not permitted unless the assembly
and installation of the window is equivalent to a pre-manufactured window that has been
tested for uniform static load and, if required, windborne debris resistance.
(7) Section R308.6 of the International Residential Code for One- and Two-Family
Dwellings is amended by adding a new subsection R308.6.10 to read as follows:
R308.6 Skylights and sloped glazing.
R308.6.10 Installation. Skylights must be installed under the manufacturer’s
installation instructions and in such a manner to resist the wind loads specified in
Subsection R301.2.1.1. Skylights must have been evaluated by either a model code
evaluation service, an ICC evaluation service, or other evaluation services recognized
by the Texas Department of Insurance to determine their wind resistance rating.
(8) Section R310.1.4 of the International Residential Code for One- and Two-Family
Dwellings is revised to read as follows:
R310.1.4 Bars, grills, covers and screens. Bars, grills, covers, screens or similar
devices are permitted to be placed over emergency escape and rescue openings,
bulkhead enclosures, or window wells that serve such openings, provided the minimum
net clear opening size complies with Section R310.1.1 to R310.1.3, and such devices
shall be releasable or removable form the inside without the use of force greater than
that which is required for normal operation of the escape and rescue opening. If the
opening requires the use of a separate tool or key, the tool or key must be stored at a
visible location, which is adjacent to and within 4 feet of the opening. The net clear
opening dimensions must be the result of normal operation of the opening.
(9) Section R322.1 of the International Residential Code for One- and Two-Family
Dwellings is revised to read as follows:
R322.1 Scope. Dwelling structures must comply with the Texas Accessibility Standards
as applicable for one and two family dwellings.
(10) Section R323.1 of the International Residential Code for One- and Two-Family
Dwellings is revised to read as follows:
R323.1 General. Buildings and structures constructed in flood hazard areas (including
A or V Zones) as established in Table R301.2(1) shall be designed and constructed in
accordance with the provisions contained in this section, and must comply with the
provisions of the City of Corpus Christi Flood Hazard Prevention Code, Article V.
Chapter 14, Code of Ordinances.
(11) Chapter 3 of the International Residential Code for One- and Two-Family Dwellings
is amended by adding a Section R324 to read as follows:
SECTION R324 BOAT DOCKS AND MOORINGS
R324.1 General It is unlawful, unless specifically provided by this code, for any person,
firm, or corporation to place, build, or construct or maintain any dock, pier, mooring,
piling, post, pipe or pole in the waters within the City limits of the City or within the
Corpus Christi Reservoir below elevation ninety-four (94) feet above mean sea level.
R324.2 Permits required The Building Official must issue permits for the placing,
building, or construction of any dock, pier, mooring, piling, post, pipe, or pole in the
waters within the City limits of the City of Corpus Christi or within the Lake Corpus
Christi Reservoir below elevation ninety-four (94) feet above mean sea level. Each
permit must be for a specific dock, pier, mooring, piling, pole, pipe, or post, or for the
construction of a dock or other structure at a specific locality within the waters of the
City or the Lake Corpus Christi Reservoir, and must specify the dimensions and the
type of materials to be used and describe the upland to which said placement or
structure is attached. The permit must be issued only upon furnishing of information to
the Building Official sufficient to place such information on the permit requested.
Compliance with the provisions in obtaining a permit does not relieve any person, firm,
or corporation from obtaining authority from any other governmental body for placing
any facility or structure in water of the City.
R324.3. Boat docks and fishing piers.
       R324.3.1 Construction standards.
              R324.3.1.1. All boat docks and fishing piers must be reinforced concrete
              and/or heavy timber construction.
              R324.3.1.2. Wood piles used to support boat and fishing piers must be
              pressure impregnated according to AWPA Standard C18.
              R324.3.1.3. The piles must be driven to a minimum penetration below the
              mud line equivalent to one-half (1/2) the length of the cut-off pile.
              R324.3.1.4. All piers must be designed to withstand a total live load of fifty
              (50) pounds per square foot.
              R324.3.1.5. All wooden structural members below the walkway level
              (caps, stringers, braces, etc.) must be pressure impregnated according to
              AWPA Standard C18.
              R324.3.1.6. The primary pier walkway or platform must be elevated or
              otherwise designed to minimize damage resulting from wave action or
              rising waters. For purposes of this section, the designer may refer to the
              flood insurance rate maps and flood hazard boundary floodway maps of
              the City or the County in determining the damage potential from wave
              action or rising waters at the specific locality.
             R324.3.1.7. All wooden caps, stringers, beams, etc., must be positively
             connected to its supporting member in such a manner so as to completely
             resist their displacement by wave action or rising waters.
             R324.3.1.8. Wooden decking must be at least two inch nominal thickness
             and must be nailed to its supporting member in such a manner to allow
             the decking to be displaced by wave action or rising waters.
             R324.3.1.9. All hardware must be hot dipped galvanized under ASTM
             Standard A153-61.
             R324.3.1.10. When any boat dock or fishing pier is used as an integral
             part of an exit way from a building, guardrails must be provided as
             prescribed in this code. In all other cases, adequate guardrail protection
             as determined by the designer may be provided.
      R324.3.2. Design. All boat docks and fishing piers must be designed by a
      professional engineer licensed in the State of Texas.
      R324.3.3. Damaged boat docks and fishing piers.
             R324.3.3.1. Damaged boat docks and fishing piers may be rebuilt at their
             original elevation providing that at least seventy five (75) percent of the
             existing pilings are sound. The Building Official must make this
             determination. All piers not meeting this requirement must be removed.
             R324.3.3.2. Damaged piers not completely rebuilt must be completely
             removed."
(12) Chapter 3 of the International Residential Code for One- and Two-Family Dwellings
is amended by adding a new Section 325 to read as follows:
      SECTION R325 LOCATION OF BUILDINGS NEAR OIL AND GAS WELLS
R325.1 General. The presence of oil and gas wells within the City present the risks of
blow-outs and explosions which would endanger the lives of occupants in any buildings
in proximity to wells. The land drilling ordinance and the Fire Prevention Code prohibit
flames around wells. This chapter regulates the location of buildings in proximity to oil
and gas wells in order to provide for the safety of building occupants.
R325.2 Buildings prohibited within one hundred fifty (150) feet of active wells.
      R326.2.1 No habitable building may be constructed within one hundred fifty (150)
      feet of an oil and gas well that has not been plugged and abandoned under the
      City's land drilling ordinance, except buildings directly associated with the
      production from such a well.
      R326.2 2 Any oil or gas well that was plugged and abandoned prior to May 29,
      1968, with mud or only a bottom plug is considered to be unsafe for the location
      of any building within fifty (50) feet the well, until remedied by setting a cement
      plug in the well near the surface, cutting the casing off below ground, and placing
      a steel plate over the top.
R326.3 Natural gas seepage areas. In any area characterized by seeping methane
gas at the surface of the ground, any building constructed must be provided with
ventilation for the purpose of protecting against any accumulation of explosive gases
under the building. The ventilation system must be designed by an registered
professional engineer, who must submit a statement with the application for the building
permit to the effect that the design of the ventilation system was prepared under this
section.
                            CHAPTER 4 - FOUNDATIONS
(13) Section R401.1 of the International Residential Code for One- and Two-Family
Dwellings is amended by adding a new exception 3 to read as follows:
R401.1 Application. The provisions of this chapter shall control the design and
construction of the foundation and foundation spaces for all buildings. Wood
foundations shall be designed and installed in accordance with AF&PA Report No. 7.
      Exceptions:
             1. The provisions of this chapter shall be permitted to be used for wood
                foundations only in the following situations:
                1.1. In buildings that have no more than two floors and a roof.
                1.2. When no dimension in a basement room or crawl space area
                     exceeds the smaller of either the building width or length.
             2. In addition to the provisions of this chapter, the design and construction
                of foundations in areas prone to flooding as established by Table
                RR301.2(1) shall meet the provisions of §R323.
             3. The City has developed and adopted specific foundation standards to
                address local soils and climatic conditions. The City foundation
                standards are contained in Sections R403.1.8 and R403.1.9. If any
                other provision of this code conflicts with a provision of Section
                R403.1.8 or R403.1.9, the provisions of Section R403.1.8 and
                R403.1.9 supersedes the other provision.
Wood foundations in Seismic Design Categories D1 and D2 shall be designed in
accordance with accepted engineering practice.
(14) Section R403.1.8 of the International Residential Code for One- and Two-Family
Dwellings is revised to read as follows:
R403.1.8. Foundations on expansive soils. All residential slab-on-grade foundations,
with the exception of conventionally reinforced slabs less than 500 s.f., must be
designed by a licensed professional engineer having sufficient engineering knowledge
and experience in structural and foundation slab engineering. A post tensioned
foundation must be designed under the latest publication of “Design and Construction of
Post-Tensioned Slabs on Ground by the Post-Tensioning Institute and sound
engineering judgment. A conventionally reinforced slab on grade foundation must be
constructed under the latest requirements of the applicable standards of the American
Concrete Institute (ACI). The design calculations for a post-tensioned or a
conventionally reinforced design must also comply with the applicable design
requirements in this Chapter.
      R403.1.8.1. Repairs. Repairs requiring any structural modification(s) to an
      existing foundation system, including the backfill resulting from a plumbing
      reroute and/or any other components or modifications that alter any existing
      foundation design parameter, must have an engineer of record. An engineered
      repair design plan and specifications or a letter signed and sealed by the
engineer of record indicating responsibility to inspect and certify the backfill must
be submitted with the appropriate plumbing and or building permit applications.
An exception to the requirement for an engineer of record when certification of
backfill is the only requirement, a letter from a certified testing laboratory
performing density testing to ensure compaction as required by this code must
be acceptable. The letter from the testing laboratory must be signed and sealed
by the engineer and accompanied by the test results that substantiate
compliance with the code requirements. Once the appropriate plumbing and or
building permits have been issued and work commenced, inspections in
conformance with this chapter are required.
R403.1.8.2. Certification. The engineer of record must submit to the City a
Foundation Affidavit on a form provided by the City upon completion of any and
all foundation work including any repairs or modifications to a foundation. The
foundation affidavit must be submitted prior to the issuance of a certificate of
occupancy for new construction.
R403.1.8.3 Design. The engineer of record must be required to obtain soils
information either from a geotechnical investigation on the lot or from the original
subdivision geotechnical report providing said report is reflective of the soil
conditions at the specific site. The engineer of record must state the source of
soil design criteria. In lieu of geotechnical investigation criteria, the engineer of
record may opt to use the design parameter limits and design criteria for soils
where the plasticity index is greater than fifteen (15) as outlined in this section.
       R403.1.8.3.1 For areas within the jurisdiction of the City where the
       plasticity index (PI) of the soil is greater than fifteen (15), the following
       minimum design parameter limits must be used for the design of a post-
       tensioned slab on grade foundation:
              1. For the center lift design, e sub m = 6 feet and y sub m = 5.7
              inches;
              2. For the edge lift design, e sub m = 2.5 feet and y sub m = 2.3
              inches; and
              3. Allowable soil bearing pressure is at least two thousand five
                 hundred (2,500) psf for natural soils or the foundation foot print
                 sub-grade and fill materials other than up to twelve (12) inches
                 of cushion sand, must be compacted to a minimum of ninety
                 (90) percent standard proctor density.
       R403.1.8.3.2 For areas within the jurisdiction of the City where the
       plasticity index (PI) of the soil is greater than fifteen (15), the following
       minimum design configuration limits must be used for the design of the
       post-tensioned slab on grade foundation:
          1. Minimum depths for both interior and exterior beams must be
             twenty four (24) inches;
          2. Minimum beam widths must be ten (10) inches;
          3. Maximum beam spacing must be sixteen (16) feet; and
          4. Maximum vertical joint spacing for brick veneer must be twenty (20)
             feet or design deflections must be restricted to L/1000.
      R403.1.8.3.3 For areas within the jurisdiction of the City where the
      plasticity index (PI) of the soil is less than fifteen (15), the minimum design
      parameters and configuration limits that must be used are contained in
      Chapter 2 of “Design and Construction of Post-Tensioned Slabs On
      Ground”, by the Post Tensioning Institute and this code.
      R403.1.8.3.4 For areas within the jurisdiction of the City where the
      plasticity index (PI) of the soil is less than fifteen (15), the following
      additional minimum design configuration limits must be used for the
      design of a post-tensioned slab on grade foundation:
          1. Minimum beam depth must be eighteen (18) inches; and
          2. Maximum beam spacing must be twenty-two (22) feet.
      R403.1.8.3.5 For all foundations within the jurisdiction of the City and for
      all plasticity index (PI) values the following standards apply to post-
      tensioned slab on grade foundations:
          1. Minimum tendon size must be one-half (1/2) inch diameter, Grade
             270, seven (7) wire strand; and
          2. Beams must be founded no less than six (6) inches into undisturbed
             soil or soil compacted to a minimum of ninety (90) percent standard
             proctor density.
R403.1.8.4 Inspections. Construction inspections must be performed by the
engineer of record or the engineer's designated representative and must include
the following inspections specified in this code.
      R403.1.8.4.1. A pre-construction site inspection must be performed to
      verify the following has been performed:
             1. That the vegetation and associated root systems have been
                removed from the slab site and that the site is suitable for
                construction;
             2. That no beam trench cuttings or scarified material is placed as
                fill material;
             3. That all fill has been placed under the engineer’s design in any
                portions or sections of the foundation supporting grade; and
             4. That proper soil compaction of the foundation footprint and fill
                material has been performed to a minimum of ninety (90)
                percent standard proctor density.
      R403.1.8.4.2. Prior to the placement of concrete, an inspection of the
      beam geometrics, penetrations, cable(s), cable(s) anchorage/steel
             placements and other details of the design must be made to verify
             conformance with the design plans.
             R403.1.8.4.3. Placement of the concrete must be witnessed by the
             engineer of record or the engineer's designated representative
             knowledgeable in the requirements of ACI 72.
             R403.1.8.4.4. On post-tensioned foundations, final cable tensioning may
             not be executed sooner than five (5) days after concrete placement.
             Cable tensioning must be witnessed by the engineer of record or the
             engineer's designated representative. Confirmation of proper tendon
             stressing must be verified by measuring tendon elongation. The engineer
             of record must verify that a durable corrosion protective coating has been
             applied to the tendon anchorage system and that non-shrink seal grouting
             of the cable pockets has occurred.
             R403.1.8.4.5. A building inspector must verify the seal grouting of the
             cable anchorage during the frame inspection.
(15) Section R403.1 of the International Residential Code for One- and Two-Family
Dwellings is amended by adding new subsections R403.1.9 revised to read as follows:
R403.1.9 Conventional foundations in Corpus Christi.
      R403.1.9.1 Conventionally reinforced slab on grade foundation. In
      consideration of extreme heaving and shifting characteristics of the soils in the
      Corpus Christi area, the following minimum conventionally reinforced slab on
      grade foundation standards are established. The conventional standards
      contained in this subsection may be used as provided, without requiring an
      engineer of record, for structures less than five hundred (500) square feet and
      detached garages less than nine hundred (900) square feet in area. Existing
      structures with conventionally reinforced foundations less than five hundred (500)
      square feet in area and detached garages less than nine hundred (900) square
      feet in area are exempt from the requirements of R403.1.8, except R403.1.8.1.
             R403.1.9.1.1 Floating slab foundations on expansive clay soils.
             Floating slab foundations on expansive clay soils for one and two story
             residential structures and other light frame buildings must be constructed
             under Figures R403.1.9.1(A) and (B).
             R403.1.9.1.2 Floating slab foundations on non-expansive sandy
             soils. Floating slab foundations on non-expansive sandy soils for one and
             two story residential and other light frame buildings must be constructed
             under Figures R403.1.9.1(C) and (D). Non-expansive soils are common
             on Corpus Christi Beach, the Flour Bluff area, and on the barrier islands.
      R403.1.9.2 Pier foundation. Pier foundations for one and two story residential
      and other light frame buildings must be constructed under Figure R403.1.9.2(A)
      and (B).
             R403.1.9.2.1 Piling foundation used to elevate or support structures.
             1. All wood pilings used to support single story elevated structures
                must have a minimum top diameter of ten (10) inches (two
                hundred fifty-four (254) mm).
             2. All wood pilings used to support an open at grade level wood
                frame structure must have a minimum uniform diameter of six
                (6) inches (one hundred fifty-two (152) mm).
             3. All wood piling must be pressure impregnated according to
                AWPA Standard C3.
             4. Tops of pilings must be notched to receive sills, beams, girders,
                or horizontal structural members.
             5. Top of piling connections must be a minimum of two (2) five
                eights inch galvanized bolts with galvanized ogee washers to
                supplement effective nailing.
             6. Nails used to secure sills to pilings must be 20d or larger.
                Pilings used to elevate or support structures must be driven or
                placed a minimum of eight (8) feet below natural grade, or four
                (4) feet if encased in two (2) feet of concrete.
             7. All wood pilings must be effectively knee braced, and spaced
                eight (8) feet zero (0) inches (two hundred forty four (244) mm)
                center to center.
             8. Structures elevated in flood zones must conform to the
                requirements of the Flood Hazard Prevention Code.
R403.1.9.3 Standards for detached structures.
      R403.1.9.3.1 Foundation slabs on grade constructed under Figure
      R403.1.9.3 are permitted for supporting the following detached structures:
             1. Garages less than 900 square feet;
             2. Storage sheds less than 500 square feet;
             3. Carports; and
             4. Patio covers.
      R403.1.9.3.2 Buildings using these reduced standards may not exceed
      one story or be used for habitable living occupancies.
      R403.1.9.3.3 An engineer of record is not required to certify the
      foundation of a structure built to the standards of Figure R403.1.9.3, if the
      structure does not exceed nine hundred (900) square feet in area and is
      used as a garage or the structure does not exceed five hundred (500)
      square feet in area if used for accessory storage.
R403.1.9.4 Other foundation standards. Alternate foundation designs may be
permitted provided the designs are based on a recognized national design
standard or design code, a comprehensive soil evaluation, an engineered
structural analysis, and the applicable provisions of section R403.1.8. Alternates
must be proposed under the procedures for alternate materials and methods in
Section 14-220 of the Code of Ordinances.
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                       CHAPTER 6 – WALL CONSTRUCTION
(16) Section R606.9 of the International Residential Code for One- and Two-Family
Dwellings is revised to read as follows:
R606.9 Lintels. Masonry over openings shall be supported by steel lintels, reinforced
concrete or masonry lintels or masonry arches, designed to support load imposed.
      R606.9.1 Masonry directly above chases or recesses wider than 12 inches (305
      mm) must be supported on lintels.
      R606.9.2 The design for lintels must be under this section.
             1. Minimum end bearing must be 4 inches (102 mm).
             2. The deflections of all structural lintels and horizontal supports required
                and designed under this subsection may not exceed one six-
                hundredths (1/600) of the span under full load or the anchored veneer.
      R606.9.3 Lintels and supports of cold formed steel construction must conform to
      the requirements of this section.
      R606.9.4 Lintels of ferrous iron must be galvanized with ends painted with a cold
      galvanizing coating.”
(17) Section R613 of the International Residential Code for One- and Two-Family
Dwellings is amended by revising the heading and Sections R613.1, R613.2, R613.3,
R613.4, and R613.5 and by adding R613.7 to read as follows:
                SECTION R613 EXTERIOR WINDOWS AND DOORS
R613.1 General. This section prescribes performance and construction requirements
for exterior windows, exterior doors, and garage doors installed in wall systems.
Waterproofing, sealing and flashing systems are not included in the scope of this
section.
R613.2 Performance. Exterior windows, exterior doors, and garage doors shall be
designed to resist the design wind loads specified in Table RR301.2(2) adjusted for
height and exposure per Table RR301.2(3).
R613.3 Testing and labeling. Exterior windows, exterior doors, and garage doors shall
be tested by an approved independent laboratory. Exterior windows and exterior glass
doors must bear a label identifying manufacturer, performance characteristics and
approved inspection agency to indicate compliance with the requirements of the
following specification:
      AAMA/NWWDA 101/ I.S.2
      AAMA/NDMA 101/I.S.2/NAFS
      Exceptions:
             1. Decorative glazed openings.
             2. Exterior window and door assemblies not included within the scope of
                AAMA/NWWDA 101/I.S.2 or AAMA/NDMA 101/I.S.2/NAFS shall be
                tested in accordance with ASTM E 330. Assemblies covered by this
                exception containing glass shall comply with §RR308.5.
             3. Structural wind load design pressures for window units smaller than the
                size tested in accordance with this section shall be permitted to be
                higher than the design value of the tested unit provided such higher
                pressures are determined by accepted engineering analysis. All
                components of the small unit shall be the same as the tested unit.
                Where such calculated design pressures are used they shall be
                validated by an additional test of the window unit having the highest
                allowable design pressure.
R613.4 Windborne debris protection. Protection of exterior windows, exterior doors,
and garage doors in building located in hurricane-prone regions from windborne debris
shall be in accordance with Subsection R301.2.1.2.
R613.5 Anchorage methods. The methods cited in this section apply to the
anchorage of exterior windows, exterior doors, and garage doors to the main force-
resisting system.
      R613.5.1 Anchorage requirements. Exterior windows, exterior doors, and
      garage doors must be installed per the manufacturer’s installation instructions
      and in such a manner to resist the wind loads specified in Subsection
      R301.2.1.1. Exterior windows, exterior doors, and garage doors must have been
      evaluated by either a model code evaluation service, an ICC evaluation service,
      or other evaluation services recognized by the Texas Department of Insurance to
      determine their wind resistance rating and, if required, windborne debris
      resistance rating. Substitute anchoring systems used for substrates not specified
      by the fenestration manufacturer shall provide equal or grater anchoring
      performance as demonstrated by accepted engineering practice.
      R613.5.2 Anchorage details. Exterior windows and exterior doors shall be
      anchored in accordance with the minimum requirements illustrated in Figure
      RR613.5(1), Figure RR613.5(2), Figure RR613.5(3), Figure RR613.5(4), Figure
      RR613.5(5), Figure RR613.5(6), Figure RR613.5(7) and Figure RR613.5(8).
      Anchors must be installed per the manufacturer’s installation instructions and in
      such a manner to resist the wind loads specified in Section R301.2.1.1.
             R613.5.2.1 Masonry, concrete or other structural substrate. Where
             the wood shim or buck thickness is less than 1-1/2 inches (38 mm),
             window and glass door assemblies shall be anchored through the jamb, or
             by jamb clip and anchors shall be embedded directly into the masonry,
             concrete or other substantial substrate material. Anchors shall adequately
             transfer load from the window or door frame into the rough opening
             substrate [see Figure RR613.5(1) and Figure RR613.5(2).]
             Where the wood shim or buck thickness is 1.5 inches (38 mm) or greater,
             the buck is securely fastened to the masonry, concrete or other substantial
             substrate and the buck extends beyond the interior face of the window or
             door frame, window and glass door assemblies shall be anchored through
             the jamb, or by jamb clip, or through the flange to the secured wood buck.
             Anchors shall be embedded into the secured wood buck to adequately
             transfer load from the window or door frame assembly [Figure
             RR613.5(3), Figure RR613.5(4) and Figure RR613.5(5)].
             R613.5.2.2 Wood or other approved framing material. Where the
             framing material is wood or other approved framing material, window and
             glass door assemblies shall be anchored through the frame, or by frame
             clip, or through the flange. Anchors shall be embedded into the frame
             construction to adequately transfer load [Figure RR613.5(6), Figure
             RR613.5(7) and Figure RR613.5(8)].
R613.7 Windborne debris protection. Protection of exterior windows, exterior doors,
and garage doors in buildings located in hurricane-prone regions from windborne debris
must be under Section R301.2.1.2.
                          CHAPTER 7 – WALL COVERING
(18) Section R703.4 of the International Residential Code for One- and Two-Family
Dwellings is revised to read as follows:
R703.4 Attachments. All exterior wall coverings must be installed under the
manufacturer’s installation instructions and in such a manner to resist the wind loads
specified in Section R301.2.1.1. Proprietary exterior wall coverings must have been
evaluated by either a model code evaluation service, an ICC evaluation service, or other
evaluation services recognized by the Texas Department of Insurance to determine
their wind resistance rating.
      Exception: Exterior wall coverings may be installed under Table R703.4 or
      other fasteners if it can be demonstrated through an engineering analysis that the
      attachment method can resist the required design pressures.
                   CHAPTER 8 – ROOF-CEILING CONSTRUCTION
(19) Section R802.5.1 of the International Residential Code for One- and Two-Family
Dwellings is to read as follows:
R802.5.1 Purlins. Purlins are permitted to be installed to reduce the span of rafters as
shown in Figure RR802.5.1. Purlins shall be sized no less than the required size of the
rafters that they support. Purlins shall be continuous and shall be supported by 2-inch
by 4-inch (51 mm by 102 mm) braces installed to bearing walls at a slope not less than
45 degrees from the horizontal. The braces shall be spaced not more than 4 feet (1219
mm) on center and the unbraced length of braces shall not exceed 8 feet (2438 mm).
Braces must be anchored to the perlins and to the bearing walls to resist uplift loads
unless it can be demonstrated through an engineering analysis that the dead loads from
the roof framing and the roof covering exceed the uplift loads at the point of anchorage.
A continuous load path of the required anchorage to the foundation must be provided.
The methodology used to provide the anchorage must be under Section R301.2.1.1.
(20) Section R802.10.1 of the International Residential Code for One- and Two-Family
Dwellings is amended by revising subdivision 4 and adding new subdivisions 13 and 14
to read as follows:
R802.10.1 Truss design drawings. Truss design drawings, prepared in conformance
with §RR802.10.1, shall be provided to the building official and approved prior to
installation. Truss design drawings shall include, at a minimum, the information
specified below. Truss design drawing shall be provided with the shipment of trusses
delivered to the jobsite.
      4. Design loads as applicable, including the wind loads used to design the truss.
         A statement must be included to indicate the design standard, basic wind
         speed, and Building Exposure Category used.
      13. The name and telephone number of the truss fabricator along with the name
          and telephone number of the truss designer.
      14. The truss designer must indicate on the drawings that the anchorage must
          be continuous down to the foundation."
(21) Section R802.10.2 of the International Residential Code for One- and Two-Family
Dwellings is revised to read as follows:
R802.10.2 Design. All wood trusses must be designed and certified by a Texas
licensed professional engineer. Roof trusses must be designed to meet the wind loads
specified in Section R301.2.1.1. The design and manufacture of metal plate connected
wood trusses shall comply with ANSI/TPI 1. For inspections performed by the Texas
Department of Insurance, the sealed truss drawings must be provided to the
Department for approval prior to installation.
(22) Section R806 of the International Residential Code for One- and Two-Family
Dwellings is amended by adding a new Section R806.4 to read as follows:
                        SECTION R806 ROOF VENTILATION
R806.4 Vent installation. Roof vents and roof turbines must be installed according to
the manufacturer’s installation instructions and in such a manner that resists the wind
loads specified in Section R301.2.1.1. Roof vents and turbines must have been
evaluated by either a model code evaluation service, an ICC evaluation service, or other
evaluation services recognized by the Texas Department of Insurance to determine
their wind resistance rating.
                          CHAPTER 9 – ROOF ASSEMBLIES
(23) Section R905.1 of the International Residential Code for One- and Two-Family
Dwellings is revised to read as follows:
R905.1 Roof covering application. Roof coverings shall be applied in accordance
with the applicable provisions of this section, the manufacturer’s installation instructions,
and in such a manner to resist the wind loads specified in Section R301.2.1.1.
Proprietary roof coverings must have been evaluated by either a model code evaluation
service, an ICC evaluation service, or other evaluation services recognized by the
Texas Department of Insurance to determine their wind resistance rating.
(24) Section R905.2.3 of the International Residential Code for One- and Two-Family
Dwellings is revised to read as follows:
905.2.3 Underlayment. Unless otherwise noted, required underlayment shall conform
with ASTM D 226, Type I, or ASTM D 4869, Type I. At a minimum No. 30 felt must be
used.
       Self-adhering polymer modified bitumen sheet shall comply with ASTM D 1970.
(25) Section R905.2.6 of the International Residential Code for One- and Two-Family
Dwellings is amended by adding a new Section R905.2.6.1 to read as follows:
R905.2.6 Attachment. Asphalt shingles shall have the minimum number of fasteners
required by the manufacturer. For normal application, asphalt shingles shall be secured
to the roof with not less than four fasteners per strip shingle or two fasteners per
individual shingle. Where the roof slope exceeds 20 units vertical in 12 units horizontal
(20:12), special methods of fastening are required. For roofs located where the basic
wind speed per Figure R301.2(4) is 110 miles per hour (177 km/h) or greater, special
methods of fastening are required. Special fastening methods shall be tested in
accordance with ASTM D 3161, modified to use a wind speed of 110 mph (177 km/h).
Shingles classified using ASTM D 3161 are acceptable for use in wind zones less than
110 mph. Shingles classified using ASTM D 3161 modified to use a wind speed of 110
mph are acceptable for use in all cases where special fastening is required.
       R906.2.6.1 The following method of attachment must be used:
              1. Nails must be located on the correct fastener line.
              2. A starter course must be applied at the eaves in an approved manner,
                 using 6 nails per shingle, located 2 to 3 inches back from the roof
                 edge. The starter course must be staggered from the first course,
                 unless a different type of shingle is used for the starter course.
              3. The starter course and first course must overhand the eave by ¼ to 3/8
                 inch, unless a drip edge is used, in which case less of an overhand will
                 be acceptable.
              4. The first course of shingles must be sealed to the starter course with
                 asphalt plastic cement. The asphalt plastic cement must be applied
                 between the starter course and the first course using one of the
                 following methods: application of a continuous bead of cement;
   placement of three daps of cement, approximately 1” in diameter; or
   application of a 2” wide band of cement using a trowel with a ¼ inch
   notch. The asphalt plastic cement is applied to the starter strip using
   one of the above methods so that the overlying tab of the first course
   will be adhered. If using the continuous bead or band of cement to
   seal the first course to the starter course, provide gaps approximately 1
   inch wide at about 12 inches on center to allow drainage of water that
   reaches the starter strip.
5. Along the gable end (rake edges), if a metal drip edge is not used, then
   a bleeder strip or rake starter must be used. Bleeder strips (rake
   starter) are cut from full width self sealing shingles by cutting the tabs
   (or bottom portion if no cut-outs) off of the shingle. The first bleeder
   strip (rake starter) may be installed full-length. Butt the first bleeder
   strip (rake starter) to the upslope edge of the starter course. The
   bleeder strip must be applied with 6 nails per shingle.
6. Shingles along the gable ends (rake edges) must be sealed to each
   other and the metal drip edge or bleeder strip with asphalt plastic
   cement. The asphalt plastic cement must be applied between the
   shingle and bleeder strip or metal drip edge and between the shingle
   and pervious shingle tab using either a continuous bead of cement;
   two dabs of cement, approximately 1” in diameter; or a 2” wide band of
   cement using a trowel with a ¼ inch notch. The asphalt plastic cement
   must be placed on the shingle about 1 inch from the rake edge. The
   next shingle must be set in place and fasteners applied with the
   exception of the nail at the rake. The rake end of the shingle must be
   pressed to set the shingle in the cement and the nail at the rake must
   be applied. Nails must be 1 to 1 ½ inches back from the rake.
7. Asphalt plastic cement must conform to ASTM D 4586.
8. Closed cut valley shingles must be sealed together with asphalt plastic
   cement. After the valley flashing has been installed, shingles from the
   roof plane with the lower slope or lesser height must extend
   approximately 12 inches across the valley and onto the adjoining roof.
   The shingles must be nailed no closer than 6 inches from the
   centerline of the valley. Shingles must then be applied on the
   adjoining roof plane and trimmed at least 2 inches back from the valley
   centerline. Approximately 1 inch of the tip of the valley cut must be
   trimmed back to leave a square edge on the valley end of the shingle.
   The valley cut on the end of each shingle must then be embedded in a
   3 inch wide strip of plastic asphalt cement.
9. Open cut valley shingles must be installed in the same manner as
   closed cut valley shingles with the exception that shingles on both roof
   planes are cut back 2 inches from the valley centerline. Shingles on
   both sides of the valley centerline are then sealed with asphalt plastic
   cement in the manner described above or closed cut valley shingles.
             10. The maximum overhang for shingles must not exceed 3/8 inch."
(26) Section R of the International Residential Code for One and Two Family Dwellings
is revised to read as follows:
R905.2.7.2. Underlayment and high wind. Applied in areas subject to high winds
[basic wind speed is 110 mph (177 km/h) or greater per Figure R301.2(4)] shall be
fastened to the roof deck with the fasteners specified in Section R905.2.5. The
fasteners must be applied through tin caps. The tin caps must be minimum 1 ½ inch
diameter and must be not less than 32 ga. Sheet metal. ‘Cap nails’ or prefabricated
fasteners with integral heads complying with this section must be an acceptable
alternative. The fasteners must be applied in the following manner: When one layer of
underlayment is required, one row of fasteners must be spaced 12 inches on center
along the laps and one row of fasteners must be spaced 24 inches on center in the field.
When two layers of underlayment are required, one row of fasteners must be spaced 12
inches on center along the laps.
(27) Section R905.2.8 of the International Residential Code for One- and Two-Family
Dwellings is amended by adding R905.2.8.6 to read as follows:
R905.2.8 Flashing.
      R905.2.8.6 Metal drip edge. If a metal drip edge is used, then the drip edge
      must be fastened to the roof deck with fasteners specified in Section R905.2.6.
      The fasteners must be spaced a maximum of 10 inches on center. At the eaves,
      the drip edge must be applied directly to the deck. The underlayment must be
      applied over the drip edge under Section R905.2.7. At the gable ends, the
      underlayment must be applied first, then the drip edge must be fastened over the
      underlayment.
(28) Section R905.7 of the International Residential Code for One- and Two-Family
Dwellings is revised to read as follows:
R905.7 Wood shingles. Wood shingles and shakes grade labeled No. 1 and No. 2
wood shingles and No. 1 shakes with a minimum butt thickness of one-half inch may be
used on one-family dwellings located not less than fifty (50) feet from the property line.
The installation of wood shingles and shakes shall comply with the provisions of this
section.
(29) Section R907 of the International Residential Code for One- and Two-Family
Dwellings is amended by adding new Sections 907.7, 907.8, 907.9, and 907.10 to read
as follows:
                              SECTION 907 REROOFING
R907.7 Re-roofing an asphalt shingle roof. The manufacturer’s installation
instructions for re-roofing must be followed. The requirements specified in Subsection
R907.3 must be followed. The shingles must comply with Subsection R905.2.
      R907.7.1 Application over one-layer of existing asphalt shingles. One layer
      of No. 15 underlayment must be applied over the existing asphalt shingles. The
      underlayment must be adequately secured until the new asphalt shingles can be
      applied.
             Exceptions: Underlayment may be omitted if all of the following
             conditions are met:
                1. The existing asphalt shingles and roof deck provide an adequate
                   nailing surface.
                2. The existing asphalt shingles are in satisfactory condition so that
                   the new asphalt shingles can lay flat.
                3. Butts of new asphalt shingles must be butted directly against tabs of
                   existing asphalt shingles (nested).
             The new asphalt shingles must be secured to the roof deck under Section
             R905.2.
      R907.7.2 Removal of existing asphalt shingles. All existing asphalt shingles
      and underlayment must be removed. The roof deck must be inspected to
      determine if it is adequate to receive the new roof covering. The application of
      the underlayment and the asphalt shingles must be under Section R905.2.
R907.8 Re-roofing a wood shingle or shake roof. The re-roofing of a wood shingle
or shake roof must comply with the provision of this section.
      Exception: Repairs to existing wood shingle and shake roof coverings on
      existing one family dwellings are not required to conform to the requirements of
      this section.
      R907.8.1 Replacing wood shingles or shakes with same. All existing shingles
      or shakes must be removed. A solid deck must be installed under either
      Sections R907.8.1.1 or R907.8.1.2. New wood shingles and shakes must be
      installed in as specified in Section R905.1.
      R907.8.1.1 Replacing spaced boards with a wood structural panel deck. All
      spaced boards must be removed. A new wood structural panel roof deck must
      be installed under Sections R801.2 and R803.
      R907.8.1.2 Installing a wood structural panel deck over spaced boards.
      This section is applicable for structures with a mean roof height of 25 feet or less.
      The spaced boards must be spaced a maximum of 8 inches on center. The
      horizontal edges of the wood structural panels must fall on spaced boards.
      Existing spaced boards may need to be moved or new boards may be added.
      The vertical edges of the wood structural panels may or may not fall on the roof
      framing members. As a minimum, the fasteners applied along the vertical edges
      must penetrate through the sheathing and into the spaced boards. The wood
      structural panels must be fastened to roof framing and/or spaced boards with
      minimum 10d box nails using either method 1 or method 2 presented below:
             Method 1:
                    1. The fasteners must be spaced a maximum of 8 inches on center
                       vertically along each roof framing member. Fasteners must
                       penetrate through the sheathing, through the spaced boards,
                       and into the roof framing.
                   2. Where the vertical edge of the sheathing does not fall over a
                      roof framing member, the sheathing must be fastened to the
                      spaced board with fasteners spaced a maximum of 8 inches on
                      center.
                   NOTE: The spaced boards must be fastened at each rafter with a
                   minimum of one 8d common wire nail.
            Method 2:
                   1. The fasteners must be spaced a maximum of 8 inches on center
                      vertically along each roof framing member.
                   2. Within the field of the wood structural panel, two fasteners must
                      be provided. Along edges, one fastener must be provided.
                   3. The fasteners must penetrate through the sheathing, through
                      the spaced boards, and into the roof framing.
                   4. Where the vertical edges of the sheathing does not fall over a
                      roof framing member, the sheathing must be fastened to the
                      spaced board with fasteners spaced a maximum of 8 inches on
                      center.
                   NOTE: For this method, the fastener requirements of the spaced
                   boards to the roof framing may be omitted.
907.9 Replacing wood shingles or shakes with asphalt shingles. All existing
shingles or shakes must be removed. If the existing roof covering was installed over
spaced board, the spaced boards must be removed. A new wood structural panel roof
deck must be installed under Sections R801.2 and R803. The asphalt shingles must be
installed under Section R905.2.
907.10 Re-roofing other types of roofing systems. The re-roof or recover of roof
coverings not specified in this section must be under Section R905.1
               CHAPTER 14 – HEATING AND COOLING EQUIPMENT
(30) Section M1401.4 of the International Residential Code for One- and Two-Family
Dwellings is amended by adding an exception to read as follows:
M1401.4 Exterior installations. Equipment installed outdoors shall be listed and
labeled for outdoor installation. Supports and foundations shall prevent excessive
vibration, settlement or movement of the equipment. Supports and foundations shall be
level and conform to the manufacturer’s installation instructions. Equipment installed
outdoors must be anchored to supports or foundations to resist the wind loads specified
in Section R301.2.1.1.
(31) Section M1411.3 of the International Residential Code for One- and Two-Family
Dwellings is amended by adding an exception to read as follows:
M1411.3 Condensate Disposal. Condensate from all cooling coils and evaporators
shall be conveyed from the drain pan outlet to an approved place of disposal.
Condensate shall not discharge into a street, alley or other areas so as to cause a
nuisance.
      Exception: By the use of a 3 way valve an auxiliary drain pipe may be
      connected to the primary drain and piped to enable the use of condensate for the
      irrigation of vegetation and watering of foundation provided the water does not
      run on other property or puddle.
                              CHAPTER 24 – FUEL GAS
(32) Section G2403 of the International Residential Code for One- and Two-Family
Dwellings is amended by adding definitions for the term “plastic piping” to read as
follows:
                   SECTION G2403 (202) GENERAL DEFINITIONS
PLASTIC PIPING. As used in this Code for One- and Two-Family Dwellings, in term
“plastic piping” does not include piping made from solvent weld polyvinyl chloride (PVC).
(33) Section G2413.6 of the International Residential Code for One- and Two-Family
Dwellings is amended by adding an exception to read as follows:
G2413.6 (403.6) Plastic pipe, tubing, and fittings. Plastic pipe, tubing, and fittings
shall be used outside underground only and shall conform with ASTM D2513. Pipe
shall be marked “gas” and “ASTM D2513.
      Exception: Solvent weld PVC plastic piping may not be used for gas piping, but
      solvent weld PVC plastic piping may be used as a conduit or sleeve to encase
      and protect gas pipes.
(34) Section G2414.9 of the International Residential Code for One- and Two-Family
Dwellings is revised to read as follows:
G2414.9 (404.9) Minimum burial depth. All underground piping systems shall be
installed at minimum depth of 18 inches (257 mm) below grade. If a minimum of 18
inches (257 mm) of cover cannot be maintained, the pipe must be installed in conduit or
bridged (shielded).
(35) Section G2416.4 of the International Residential Code for One- and Two-Family
Dwellings is amended by adding an exception and note to read as follows:
G2416.4 (406.4) Test pressure measurement. Test pressure shall be measured with
a manometer or with a pressure measuring device designed and calibrated to read,
record, or indicate a pressure loss due to leakage during the pressure test period. The
source of pressure shall be isolated before the pressure tests are made.
      Exceptions: The following types of devices may be used:
             1. Bourdon tube type gauge
             2. Diaphragm type gauge all calibrated in not more than ¼ inch
             increments.
             “3. Mercury gauge with not less 10 inches of mercury
      Note: All necessary apparatus for conducting the pressure test must be
      furnished by the installer.”
(36) Section G2416.4.1. of the International Residential Code for One- and Two-Family
Dwellings is revised to read as follows:
G2416.4.1 (406.4.1) Test pressure. The test pressure to be used shall be no less than
1 ½ times the proposed maximum working pressure, but not less than 5 psig (34 kPa
gauge), irrespective of design pressure. Where the test pressure exceeds 125 psig
(862 kPa gauge), the test pressure shall not exceed a value that produces a hoop
stress in the piping greater than 50 percent of the specified minimum yield strength of
the pipe.
      (37) Section G2419 of the International Residential Code for One- and Two-
      Family Dwellings is amended by adding a new subsection G2419.6 to read as
      follows:
                   “SECTION G2419 (409) GAS SHUTOFF VALVES
G2419.6 (409.6) Location of gas shutoff valves for one and two family dwellings.
The gas supply control for one and two family dwellings must be accessible above
ground. The gas shutoff valve must be provided outside of and at the building.
                    CHAPTER 25 – PLUMBING ADMINISTRATION
(38) Section P2503.5.1 of the International Residential Code for One- and Two-Family
Dwellings is revised by adding a new subparagraph 3 to read as follows:
P2503.5.1 Rough Plumbing.
      3.     Test following repairs and alterations to existing buildings.
             Repairs/replacements of the building sewer, and associate branches of
             the building sewer, the building storm sewer and associate branches of
             the building storm sewer must be tested with a 10-foot head of water.
             Repair of the building drain and associated branches of the building drain,
             the building storm drain and associate branches of the building storm
             drain must have a water test applied to the drainage system up to the
             lowest fixture outlet and to a point three feet outside the building.
(39) Section P2503.6 of the International Residential Code for One- and Two-Family
Dwellings is revised to read as follows:
P2503.6 Water supply system test. Upon completion the entire water supply system
or a section thereof, the system, or portion completed, shall be tested and proved tight,
prior to covering the piping, under a water pressure of not less than 85 psi (586 kPa); or
by an air test of not less than 85 psi (586 kPa). The water utilized for tests shall be
obtained from a potable source of supply. The required test shall be performed in
accordance with this section.
      (Note: City normal working pressure is between 40 psi (276 kPa) and 45 psi (210
      kPa). Minimum pressure is 35 psi (241 kPa). There are no current plans to raise
      the working pressure.)
(40) Section P2503.7.2 of the International Residential Code for One- and Two-Family
Dwellings is revised to read as follows:
P2503.7.2 Testing and certification of backflow devices. The owner of any reduced
pressure principle backflow preventers, double check-valve assembly backflow
preventer, double-detector check-valve assembly backflow preventer, or pressure-type
vacuum breaker assembly backflow preventer must have the backflow device tested
and certificated by a Backflow Prevention Assembly Tester before a backflow preventer
is placed in service and on annually thereafter to ensure its proper operation. The
Backflow Prevention Assembly Tester must file a copy of the initial and each annual
certification with the Building Official within 7 days of the testing.
               CHAPTER 26 – GENERAL PLUMBING REQUIREMENTS
(41) Section P2601.2 of the International Residential Code for One- and Two-Family
Dwellings is revised to read as follows:
P2601.2 Connections to drainage system. All plumbing fixtures, drains,
appurtenances, and appliances used to receive or discharge liquid wastes or sewage
shall be connected properly to the drainage system of the building or premises in
accordance with the requirements of this code. This section shall not be construed to
prevent indirect waste systems.
       Exceptions:
              1.     Bathtubs, showers, clothes washers and laundry sinks must not be
                     required to discharge to the sanitary drainage system where such
                     fixtures discharge to an approved gray water recycling system.
              2.     Bathtubs, showers, clothes washers, laundry sinks, hand washing
                     lavatories, and sinks not used for food preparation or disposal of
                     chemicals and biological ingredients must not be required to
                     discharge to the sanitary drainage system where such fixtures
                     discharge to an approved gray water/condensate irrigation system.
(42) Section P2603.6 of the International Residential Code for One- and Two-Family
Dwellings is revised to read as follows:
P2603.6 Freezing. A water pipe shall not be installed outside of a building, in attics or
crawl spaces, concealed in outside walls, or in any other place subjected to freezing
temperature unless provision is made to protect them from freezing by a ½ inch
thickness of pipe insulation, heat tracing, or both. Water service pipe shall be installed
not less than 12 inches (305 mm) deep or less than 6 inches (152 mm) below the frost
line.
                CHAPTER 29 – WATER SUPPLY AND DISTRIBUTION
(43) Section P2902.4 of the International Residential Code for One- and Two-Family
Dwellings is amended by adding a new subsection P2902.4.6 to read as follows:
P2902.4.6 Pumps and other appliances. Water pumps, filters, softeners, tanks and
all other devices that handle or treat potable water must be protected against
contamination. Whenever a pump is connected to the potable water system, the water
supply must be protected by either a proper backflow preventer with a low pressure
cutoff, or by the use of water supply tanks with an air gap.
(44) Section P2902 of the International Residential Code for One- and Two-Family
Dwellings is amended by adding a new subsection P2902.6 to read as follows:
           SECTION P2902 PROTECTION OF POTABLE WATER SUPPLY
P2902.6 Location of backflow preventers. Access and clearance must be provided
for the required testing, maintenance, and repair. Access and clearance must require a
minimum of one (1) foot (305 mm) between the lowest portion of the assembly and
grade, floor or platform. Installations elevated more than five (5) feet (1.53m) above the
floor or grade must be provided with a permanent platform capable of supporting a
tester or maintenance person.
(45) Section R2903.9.3 of the International Residential Code for One- and Two-Family
Dwellings is revised to read as follows.
R2903.9.3 Valve requirements. Valves serving individual fixtures, appliances, risers
and branches shall be provide with access. An individual shutoff valve shall be required
on the water supply pipe to each water closet, appliance, and mechanical equipment.
(46) Chapter 29, Water Supply and Distribution, of the International Residential Code for
One- and Two-Family Dwellings is amended by adding a new section P2908 to read as
follows:
SECTION P2908 LAWN IRRIGATION SYSTEMS
P2908.1 Landscape Irrigation Systems
      P2908.1.1 Drip emitters or soakers. Any irrigation system located within or
      designed to irrigate the vegetation located within five feet of a paved roadway,
      driveway, parking lot, or sidewalk tied to a curb (other than those portions of the
      sidewalks at intersections or ramps for the disabled) must use drip-emitters or
      soaker type hoses instead of spray heads, unless the irrigation system uses
      spray heads that do not produce more than minimal runoff or overspray.
      P2908.1.2 Spray heads. All other areas adjoining paved areas may be watered
      with sprinklers if the following guidelines are observed:
             1. Operating pressures may not exceed manufacturer's recommendations
             to prevent misting and drifting.
             2. Check valves must be used where elevation differential may cause low
             head drainage onto paved areas.
      3. Sprinklers must be spaced as per manufacturer's recommendations
      and adjusted for prevailing winds.
      4. Sprinkler systems must be designed for minimal runoff and overspray
      of paved and non-irrigated areas, and must use low angle nozzle, as
      needed, to prevent wind drift of water onto non-irrigated areas.
      5. Sprinkler heads must not be installed within eighteen inches of
      uncurbed paved areas to prevent damage from vehicles.
      6. All systems must be equipped with a readily accessible emergency cut
      off valve.
      7. Unprotected sprinkler heads may not be installed at locations where
      they may be damaged or run over by motor vehicles.
P2908.1.3 Definitions. For the purposes of Section P2908:
      1. The term 'roadway' means a public highway, city street, private street,
      or alley.
      2. The term 'minimal runoff and overspray' means that under prevailing
      wind conditions the sprinkler system will not throw water by the water
      pressure or water will not be blown onto adjoining pavement in a quantity
      that will either:
             a. Allow the water to stand within the gutter of a paved roadway,
             parking lot, or driveway for more than twice the number of minutes
             as the irrigation system was operated for, or
             b. Allow an individual to observe the water flowing down an
             inclined paved surface or in a gutter while the sprinkler system is in
             operation.
                        CHAPTER 30 – SANITARY DRAINAGE
                        SECTION P3005 DRAINAGE SYSTEM
(47) Section P3005.2.7 of the International Residential Code for One- and Two-Family
Dwellings is revised to read as follows:
P3005.2.7 Building drain and building sewer junction. There shall be a two-way
double riser cleanout near the junction of the building drain and building sewer. This
cleanout may be either inside or outside the building wall, provided it is brought up to
finish grade or to the lowest floor level. A wye-type cleanout, not less than four inches
(4”) in diameter, must be extended to grade and must be located at the junction of the
building sewer and public sewer, at the property line.
(48) Section P3005.3 of the International Residential Code for One- and Two-Family
Dwellings is amended by adding a new section P3005.3.1 to read as follows:
P3005.3 Horizontal drainage piping slope.
       P3005.3.1 Minimum velocity. Where conditions do not permit building drains
       and sewers to be laid with a fall as great as specified in Section P3005.3, then a
       lesser slope may be permitted provided the computed velocity will not be less
       than 2 feet per second.
(49) Tables P3005.4.1 and P3005.4.2 of the International Residential Code for One-
and Two-Family Dwellings are revised to read as follows:
                               TABLE P3005.4.1
                 HORIZONTAL FIXTURE BRANCHES AND STACKS*
                    MAXIMUM NUMBER OF DRAINAGE FIXTURE UNITS (dfu)
                                                         Stacks b
 DIAMETER          Total for a          Total     Total for stack Total for stack
  OF PIPE          horizontal      discharge into    of three      greater than
  (inches)          branch          one branch       branch        three branch
                                      interval     intervals or      intervals
                                                       less
                        --
      1½                3                 2                  4                 8
       2                6                 6                 10                24
      2½               12                 9                 20                42
                             d                d                  e
       3               20                20                48                 72
       4               160                90               240               500
       5               360               200               540               1,100
       6               620               350               960               1,900
       8              1,400              600              2,200              3,600
                     MAXIMUM NUMBER OF DRAINAGE FIXTURE UNITS (dfu)
                                                              Stacks b
    DIAMETER        Total for a          Total     Total for stack Total for stack
     OF PIPE        horizontal      discharge into    of three      greater than
     (inches)        branch          one branch       branch        three branch
                                       interval     intervals or      intervals
                                                        less
        10             2,500              1,000                3,800        5,600
        12             3,900              1,500                6,000        8,400
        15             7,000          Footnote c             Footnote c   Footnote c
For SI: 1 inch = 25.4 mm.
a
        Does not include branches of the building drain. Refer to Table 710.0(1).
b
        Stacks must be sized based on the total accumulated connected load at each
        story or branch interval. As the total accumulated connected load decreases,
        stacks are permitted to be reduced in size. Stack diameters must not be reduced
        to less than one-half of the diameter of the largest stack size required.
c
        Sizing load based on design criteria.
d
        Not more than 2 water closets.
e
        Not more than 6 water closets.”
                                   “TABLE P3005.4.2
                            BUILDING DRAINS AND SEWERS
                        MAXIMUM NUMBER OF DRAINAGE FIXTURE UNITS
                    CONNECTED TO ANY PORTION OF THE BUILDING DRAIN OR
                      THE BUILDING SEWER, INCLUDING BRANCHES OF THE
                                     BUILDING DRAIN a

    DIAMETER OF                                      Slope per foot
    PIPE (inches)      1/16 inch          1/8 inch              ¼ inch       ½ inch
        1¼                  --                  --                    1         1
        1½                  --                  --                --3          --3
         2                  --                  --                21           26
        2½                  --                  --                24           31
         3                  --              36b                   42b          50b
         4                  --              180                   216          250
         5                  --              390                   480          575
         6                  --              700                   840         1,000
                       MAXIMUM NUMBER OF DRAINAGE FIXTURE UNITS
                   CONNECTED TO ANY PORTION OF THE BUILDING DRAIN OR
                     THE BUILDING SEWER, INCLUDING BRANCHES OF THE
                                    BUILDING DRAIN a
        8               1,400             1,600             1,920             2,300
       10               2,500             2,900             3,500             4,200
       12               2,900             4,600             5,600             6,700
       15               7,000             8,300            10,000             12,00
For SI: 1 inch = 25.4 mm, 1 inch per foot = 0.0833 mm/m.
a
      The minimum size of any building drain serving a water closet must be 3 inches.
b
      Not over two water closets
                        SECTION P3005 DRAINAGE SYSTEM
P3005.5 Pre-tap connection. When connection to the public sewer requires
connection to an existing pre-tap, the tie-in must be made within 48 inches from the
finish grade; on private property, at the easement or at the edge of the property; and be
readily accessible for inspection.
      Exception. When it is obvious from ground level that proper connection has
      been made, even if the depth of the tie-in is more than forty-eight inches (48"),
      the inspection must be approved. Written acceptance of the tie-in inspection
      from the City Wastewater Department will be the only other approval for
      compliance.
                                 CHAPTER 31 - VENTS
(50) Section P3102 of the International Residential Code for One- and Two-Family
Dwellings is amended by adding a new section P3102.4 to read as follows:
                SECTION P3102 VENT STACKS AND STACK VENTS
      P3102.4 Minimum size of vent stack with water closet. Every sanitary
      drainage system receiving the discharge of a water closet must have a minimum
      three (3) inch diameter main vent that is either a vent stack or a stack vent. Such
      vent must run undiminished in size and as directly as possible from the building
      drain through to the open air above the roof.
(51) Section P3104 of the International Residential Code for One- and Two-Family
Dwellings is amended by adding new sections P3104.7 and P3104.8 to read as follows:
               SECTION P3104 VENT CONNECTIONS AND GRADES
      P3104.7 Vents for traps. Traps for island sinks and similar equipment must be
      roughed in above the floor and may be vented by extending the vent vertically to
      not less than the drain board height, returning vertically downward and
      connecting it to the horizontal sink drain immediately downstream from the
      vertical fixture drain. Horizontal venting will not be permitted in this installation.
             P3104.7.1 Conditions in which an island vent may be used. An island
             vent may be used:
                    1. If the sink or lavatory is installed in an island.
                    2. If the total developed length of the fixture drain through the wier
                    of the trap exceeds 8 feet.
                    3. If the structure prevents venting by another means.
             P3104.7.2 A vertical vent must be installed on the drain line downstream
             of the island vent configuration.
      P3104.8 Vents for bar and fountain sink traps. Traps serving sinks which are
      part of the equipment of bars, soda fountains, and counters need not be vented
      when the location and construction of such bars, soda fountains, and counters
      makes it impossible to do so. When these conditions exist, such sinks may be
      vented under P3104.7. Drainage must be under Section 802.
(52) Section P3114.1 of the International Residential Code for One- and Two-Family
Dwellings is amended by adding a new subsection P3114.1.1 to read as follows:
P3114.1 General.
      P3114.1.1 Installation of air admittance valves (mechanical vents)
      restricted. It must be unlawful to use air admittance valves, except when
      conditions prevent the installation of a conventional or island fixture vent system.
(53) Section P3005 of the International Residential Code for One- and Two-Family
Dwellings is amended by adding a new sections P3005.6 to read as follows:
                                CHAPTER 32 – TRAPS
(54) Section P3201.2 of the International Residential Code for One- and Two-Family
Dwellings is amended by adding an exception to read as follows:
P3201.2. Trap seals and trap seal protection.
      Exceptions.
             1. Traps for floor drains shall be fitted with a trap primer or shall be of the
             deep seal design.
             2. Multiple traps may be primed with one trap primer if a distribution box is
             used.
(55) Section P3201.6 of the International Residential Code for One- and Two-Family
Dwellings is revised to read as follows:
P3201.6 Number of fixtures per trap. Each plumbing fixture shall be separately
trapped by a water-seal trap, except as otherwise permitted by this code. The trap shall
be placed as close as possible to the fixture outlet. Fixtures shall not be double
trapped. Exceptions to the separate trapping requirements are as follows:
      1.     Fixtures that have integral traps.
      2.     A single trap shall be permitted to serve two or three like fixtures limited to
             kitchen sinks, laundry tubs and lavatories. Such fixtures shall be adjacent
             to each other and located in the same room with a continuous waste
             arrangement. The trap shall be installed at the corner fixture where three
             such fixtures are installed. Common trapped fixture outlets shall not be
             more than 30 inches (762 mm) apart. An automatic clothes washer or
             laundry tub must not discharge to a trap serving a kitchen sink.
      3.     The connection of a laundry tray waste line is permitted to be made into a
             standpipe for the automatic clothes-washer drain in accordance with
             Section P2706.2.1.
                               PART VIII - ELECTRICAL
(56) Part VIII – Electrical of the International Residential Code for One- and Two-Family
Dwellings is deleted. The provisions of the City of Corpus Christi Electrical Code
applies to one- and two-family dwellings.
             APPENDIX J – EXISTING BUILDINGS AND STRUCTURES
(57) Appendix J - Section AJ301 of the International Residential Code for One- and
Two-Family Dwellings is amended by adding AJ301.5 to read as follows:
                              SECTION AJ301 REPAIRS
AJ301.5 Structural. Repairs to load bearing structural members, both interior and
exterior must comply with Section R301.2.1.1.
(58) Section AJ401.4 of the International Residential Code for One- and Two-Family
Dwellings is revised to read as follows:
AJ401.4 Structural. Unreinforced masonry buildings located in Seismic Design
Categories D2 or E shall have parapet bracing and wall anchors installed at the roofline
whenever a reroofing permit is issued. Such parapet bracing and wall anchors shall be
of an approved design. Renovations to load bearing structural members, both interior
and exterior and other components, elements or members subject to wind loading must
comply with Section R301.2.1.1.
(59) Section AJ501.4 of the International Residential Code for One- and Two-Family
Dwellings is revised to read as follows:
AJ501.4 Structural. The minimum design loads for the structure shall be the loads
applicable at the time the building was constructed, provided that no dangerous
condition is created. Structural elements that are uncovered during the course of the
alteration and that are found to be unsound or dangerous shall be made to comply with
the applicable requirements of this code. Alterations that are exposed to wind loading
must comply with Section R301.2.1.1.
(60) Section AJ602.1 of the International Residential Code for One- and Two-Family
Dwellings is amended by adding a new section AJ602 to read as follows:
AJ602.1 Structural. For additions, the portions of the existing structure which carry
loads from the addition must be constructed under the wind load requirements of
Subsection R301.2.1.1. Any portions of an existing structure, which becomes exposed
due to the addition, must conform to the wind load requirements of Subsection
R301.2.1.1. For additions or new construction on top of existing buildings and
foundations systems, the new construction and structural components of the existing
structure and foundation system which carry the loads must be capable of carrying the
loads imposed by the new construction.
                        APPENDIX M – BUILDING SECURITY
(61) The International Residential Code for One- and Two-Family Dwellings is amended
by adding new Appendices M, N, and O to read as follows:
AM101 General. This appendix contains suggestions for improving the physical
security of buildings.
AM102 Exterior doors.
      AM102.1 Construction. All exterior doors, except sliding glass doors or metal
      doors, should be solid core doors if wood and should be a minimum of one and
      three-eights (1 3/8) inches in thickness. Hollow core doors should not be used.
      AM102.2 Hinges. All exterior door hinges should be mounted with the hinge on
      the interior of the building, except where a non-removable hinge pin or stud bolt
      is used; such a hinged may be installed with the hinge facing the exterior of the
      building.
      AM102.3 Strike plate lock area. The shim space between the door buck and
      door frame should have a solid wood filler twelve (12) inches above and below
      the strike plate area to resist spreading by force applied to the door frame.
      Screws securing the strike plate area should pass through the strike plate, door
      frame, solid wood filler, and enter the buck plate by a minimum of one quarter
      (1/4) of an inch.
      AM102.4 Glass in exterior doors. No glass should be used on any exterior
      door within forty inches of any lock.
      AM102.5 Door locks.
             AM102.5.1 All exterior door locks should be single cylinder keyed locks
             with mortised dead bolt that extends into the strike plate a minimum of one
             (1) inch.
             AM102.5.2. Lock bolts should have a case hardened steel insert to resist
             hack sawing.
             AM102.5.3. Locks should have case hardened steel cylinder guards on
             exterior, to resist prying and pulling.
             AM102.5.4 Retaining screws on interior of lock should be the shielding or
             non-removable type.
      AM102.6 Sliding glass doors. Sliding glass doors should be installed with the
      sliding portion on the inside only, so as to prevent the lifting and removal of the
      glass panel from the exterior of the building. Each sliding panel should have a
      secondary locking or securing device in addition to the original lock, such as:
             AM102.6.1. A Charlie bar, which is a device laid in the track to prevent
             opening.
             AM102.6.2. An approved track lock.
             AM102.6.3. Inside removable pins or locks securing the panel to the
             frame.
AM102.7 Exterior glazing. All glass used in exterior sliding glass doors and
fixed glass panels should be tempered glass or polycarbonate sheeting.
AM102.8 Windows. All locking devices should be secured with three-quarter
inch #8 full threaded screws as a minimum.
AM102.9 Door viewers. Door viewers should be installed on all main entrance
doors and should cover one hundred eighty (180) degrees of viewing. Such
viewers should be installed with the securing portion on the inside.
AM102.10 Lights. All exterior doors should be provided with an approved light,
with interior activated switch to illuminate the door area for at least ten (10) feet
an any direction.
AM102.11 Key requirements. During construction the building should use a
lock cylinder that will be removed upon occupancy, and new cylinders and all
keys should be furnished to the occupant.
 APPENDIX N - TIE DOWN STANDARDS FOR PORTABLE BUILDINGS, TRAVEL
TRAILERS, UNOCCUPIED MANUFACTURED HOMES ON MOBILE HOME DEALER
   SALES LOTS, INDUSTRIALIZED HOUSING UNITS NOT INSTALLED ON A
                 PERMANENT SITE, AND MOBILE HOMES.
AN101 Definitions. As used in this Appendix, the following term have these meanings:
      HUD-code manufactured home. A structure constructed on or after June 15,
      1976, under the rules of the United States Department of Housing and Urban
      Development, that is (1) built on a permanent chassis, (2) designed for use as a
      dwelling, (3) with or without a permanent foundation when the structure is
      connected to the required utilities, (4) transportable in one or more sections, and
      (5) in the traveling mode, is at least eight body feet in width or at least 40 body
      feet in length or, when erected on site is at least 320 square feet. The term
      HUD-code manufactured home includes the plumbing, heating, air conditioning
      and electrical systems contained in the structure. HUD-code manufactured
      home does not include a recreational vehicle as defined by 24 CFR 3282.8(g).
      Industrialized housing. A residential structure that is (1) designed for the
      occupancy of one or more families, (2) constructed in one or more modules or
      constructed using one or more modular components built at a location other than
      the permanent site, (3) designed to be used as a permanent residential structure
      when the module or the modular component is transported to the permanent site
      and erected or installed on a permanent foundation system, and (4) constructed
      under the authority of Chapter 1202 of the Texas Occupations Code. Each
      transportable modular section or modular component must have decals or
      insignia issued by the Texas Commission of Licensing and Regulation to indicate
      compliance with Chapter 1202 and the Commission's implementing rules.
             (1) The term industrialized housing includes the plumbing, heating, air
             conditioning and electrical systems contained in the structure.
             (2) The term industrialized housing does not include (1) a residential
             structure that exceeds three stories or 49 feet in height as measured from
             the finished grade elevation at the building entrance to the peak of the
             roof, (2) housing constructed of a sectional or panelized system that does
             not use a modular component, or (3) a ready-built home constructed in a
             manner in which the entire living area is contained in a single unit or
             section at a temporary location for the purpose of selling and moving the
             home to another location.
      Mobile home. A mobile home means a structure, transportable in one or more
      sections, which in the traveling mode is 8 body feet (2,438 body mm) or more in
      width or 40 body feet (12,192 body mm) or more in length, or, when erected on
      site, is 320 square feet (930 m2) or more, and which is built on a permanent
      chassis and designed to be used as a dwelling with or without a permanent
      foundation when connected to the required utilities, and includes the plumbing,
      heating, air conditioning and electrical systems contained in the structure. The
      term mobile home does not include a HUD-code manufactured home.
      Portable building. A structure that is constructed off-site that is moved onto a site
      that does not have a permanent foundation, including a manufactured storage
      unit sold in a kit that does not have a permanent foundation.
      Travel trailer. A travel trailer is a vehicular, portable structure built on a chassis
      and designed to be used without a permanent foundation, as a temporary
      dwelling, which may be occupied with or without utilities provided by temporary
      connections at a parking site."
AN 102 Portable buildings.
      AN102.1 All portable buildings located within the City must be securely anchored
      to the ground by a means described in AN106.
      AN102.2 During a period of time when hurricane warnings or watch, issued by
      the NOAA National Weather Service, are in effect for the City, in addition to its
      permanent anchors, a portable building must either be securely anchored to the
      ground with over-the-roof tie straps that are attached to anchors described in
      AN105 or disassembled and stored securely in permanent buildings.
      AN102.3 Any portable building within the City limits when hurricane warnings or
      watch are in effect, which is not secured with other the roof straps that are
      anchored to the ground or disassembled and stored within a permanent building
      is declared a public nuisance and threat to the public safety and welfare.
AN103 Travel trailers.
      AN103.1 Travel trailers to be left within the City, or which are left in the City, at
      parking site during a period of time when hurricane warnings or watch, issued by
      the NOAA National Weather Service, are in effect for the City, must be securely
      anchored to the ground by a means described in AM106 or be lashed to rigid
      construction capable of holding the travel trailer using approved tie materials and
      connectors described in AN105, or stored securely in permanent buildings.
      AN103.2 Any travel trailers left within the City must be road worthy, be registered
      with the Department of Motor Vehicles, and must bear a valid license plate.
      AN103.3 Any travel trailer that is within the City limits when hurricane warnings
      or watch are in effect, which is not road worthy, not registered, does not bear a
      valid license plate, or not anchored to the ground, lashed to rigid construction, or
      stored within a permanent building is declared a public nuisance and threat to the
      public safety and welfare.
AN104 Unoccupied HUD-code manufactured homes located on mobile home
dealers sales lots and industrial housing units not installed on a permanent site.
      AN104.1 Unoccupied HUD-code manufactured homes located on mobile home
      dealers sales lots and industrial housing units not installed on a permanent site
      must be anchored as a minimum, at each corner of the mobile home.
      AN104.2 A frame tie, an over-the-roof tie anchor, connections, and piers and
      footing must be Installed at each corner under AN106, during periods of time
      when a hurricane warning or watch issued by the NOAA National Weather
      Service is in effect for the City.
AN105 Approved tie-down methods for mobile homes, HUD-code manufactured
homes, and industrial housing units. All mobile home, HUD-code manufactured
home, and industrial housing unit installations must comply with the following tie-down
methods.
      AN104.1 Quantity of blocking and anchorage. Approved blocking an
      anchorage is illustrated in Figure AN104.1.
                     Table AN104.1.1 Number of vertical ties per side.
                   Mobile Home Box Width (feet)                  Number of
                                                                 Vertical ties
                                                                 required
                   10               12            14
      Mobile       46 to 56         75 to 80      80             5
      Home
      Box
      Length
      (feet)
                   35 to 46         56 to 75      60 to 79       4
                   33 to 34         38 to 55      40 to 59       3
                                    33 to 37      33 to 39       2


      Note: The vertical ties nearest the end of the unit must be placed between four
      (4) feet and eight (8) feet from the end.
                Table AN104.1.2. Number of diagonal ties per side.
                                          All box widths     Number of Diagonal
                                                             Ties Required
      Mobile Home Box Length (feet)       33 to 43           4
                                          43 to 52           5
                                          53 to 63           6
                                          64 to 73           7
                                          74 to 80           8


      Note: The diagonal ties nearest the end of the unit must be placed between four
      (4) feet and eight (8) feet from the end.
      AN104.2 Piers and footings.
             1. Spaced at ten foot intervals on both frame rails with end ones no
                further than one (1) foot from the end.
             2. Four inch by sixteen inch wide concrete runners.
             3. Footings of solid concrete sixteen inch by sixteen inch by four inch.
             4. Piers of standard tight inch by eight inch by sixteen inch open cell or
                (thirty inch maximum height) solid concrete block.
             5. Wood blocks used for leveling must not exceed a maximum thickness
                of four (4) inches. Such blocks must be of nominal eight inch by
                sixteen inch dimensions.
      AN104.3 Patio and cabana roofs.
             1. Two (2) rows of vertical support bars with twelve inch spacing. Second
                row to be down middle or at mobile home edge anchored to concrete
                floor or equivalent footings.
             2. Other structures on lot must be secured.
             3. Tip out rooms to be held by over-the-home tie at outer edge.
             4. Clerestory roof requires over-the-home tie at end of each raised
                section.
AN106 Anchoring equipment. Anchoring equipment must be capable of resisting all
allowable working loads and capable of withstanding fifty (50) percent overload
specified in AN105.3 without failure of either the anchoring equipment or the attachment
point of the portable building, travel trailer, or mobile home.
      AN106.1 Ground anchors. Ground anchors must be of an “approved design
      and must be used in a soil type for which they are designed and approved.
      Approved equipment includes the following:
             1. Auger or dead man, which is at least six (6) inches in diameter, or
                arrowhead with a flat plane, which is at least eight (8) inches wide.
             2. Auger or arrowhead depth four (4) feet; dead man five (5) feet. All
                augers must be screwed into the earth the full four-foot depth.
             3. Anchor rod five-eights inch diameter with welded eye at top. The
                anchor rode must be hooked into concrete when used in dead man
                anchors.
             4. Anchors to slabs must equal to the pull resistance described in AN105.
             5. All augers, arrowhead, or anchors must be of galvanized steel.
      AN105.2 Approved tie materials and connectors.
             1. Galvanized or stainless steel cable-three eights inch 7 x 7 cable (seven
                strands of #7 wires).
     2. Galvanized aircraft cable-one-quarter inch 7 x 19 cable (seven (7)
        strands of #19 wire).
     3. Steel strap-one and one quarter inch x .035 inch galvanized with
        tensioning device.
     4. Cable ends secured by two (2) U-bolt clamps.
     5. Steel rods-five eights inch with ends welded closed to form an eye.
     6. Turnbuckles-five eighths inch drop forged, closed eyes.
     7. Other tensioning devices of similar strength approved.
AN105.3 Minimum working loads and overloads.
     1. Travel trailers. Anchoring equipment for travel trailers must be capable
        of resisting all allowable working loads equal to or exceeding three
        thousand one hundred fifty (3,150) pounds and must be capable of
        withstanding fifty (50) percent overload (four thousand seven hundred
        twenty five (4,725) pounds total).
     2. Portable buildings. Anchoring equipment must be capable of resisting
        all allowable working loads equal to or exceeding three thousand one
        hundred fifty (3,150) pounds and must be capable of withstanding fifty
        (50) percent overload (four thousand seven hundred twenty five
        (4,725) pounds total).
     3. Mobile homes. Anchoring equipment must be capable of resisting all
        allowable working loads equal to or exceeding three thousand one
        hundred fifty (3,150) pounds and must be capable of withstanding fifty
        (50) percent overload (four thousand seven hundred twenty five
        (4,725) pounds total).
                        INSERT FIGURE K-1
       APPENDIX O - GRAY WATER/CONDENSATE IRRIGATION SYSTEMS
AO101 General. Gray water/condensate disposal systems. Modification of the
drains and piping systems to allow the diversion of gray water and condensate for the
irrigation of vegetation and watering of foundations is permitted. However, no
modifications may be made if the diversion of gray water will impair the proper operation
of the drainage system. The plans and installation of a gray water disposal system,
which provides for the storage of gray water, must be designed and certified by a
registered professional engineer or registered professional sanitarian.
AO102 Definitions. As used in this appendix, the following terms have these
meanings:
      Condensate. The untreated water that is collected as a result of the water
      vapors in humid air being converted into the liquid state through contact with
      cooling coils or evaporators in air conditioning and other cooling systems.
      Gray Water. Wastewater from clothes washing machines, showers, bathtubs,
      hand washing lavatories, and sinks that are not used for food preparation or
      disposal of chemical and biological ingredients.

				
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