SECTION 05 50 00 - METAL FABRICATIONS by 4ibl3Fk

VIEWS: 4 PAGES: 15

									                                  SECTION 05 50 00

                                METAL FABRICATIONS

Stainless steel and aluminum are not currently included in this section. If required, re-
fer to MasterSpec Section 05 50 00 fl_.doc for specifications.

Cast nosings and treads and extruded nosings and tread are not included. Refer to
MasterSpec Section 05 50 00 fl_.doc for specifications.



                                  PART 1 - GENERAL


1.1     SUMMARY
  A.    This Section includes the following:

The following list must be edited on a project-by-project basis.
        1.    Steel roof access ladders.
        2.    Ladder safety cages.
        3.    Steel ship's ladders.
        4.    Steel elevator pit ladder.
        5.    Support angles for elevator door sills.
        6.    Elevator sump pit grate.
        7.    Loose bearing and leveling plates.
        8.    Steel weld plates and angles for casting into concrete not specified in
              other Sections.
        9.    Loose steel lintels.
        10.   Shelf angles.
        11.   Steel framing and supports for overhead doors.
        12.   Steel framing and supports for ceiling hung toilet compartments.
        13.   Steel framing and supports for operable partitions.
        14.   Steel framing and supports for countertops.
        15.   Steel framing and supports for mechanical and electrical equipment.
        16.   Steel framing and supports for applications where framing and supports
              are not specified in other Sections.
        17.   Pre-engineered Modular Support System.
        18.   Metal angle corner guards.
        19.   Metal edgings.
        20.   Loading-dock edge angles.
        21.   Miscellaneous metal trim.
        22.   Metal floor plate and supports.
        23.   Pipe guards.
        24.   Pipe bollards.
  B.    Related Sections include the following:
        1.    Steel supports for countertops: Section 06 40 23.
        2.    Division 05 Section "Metal Stairs."
        3.    Division 05 Section "Pipe and Tube Railings."
        4.    Division 05 Section "Metal Gratings."
        5.    Division 05 Section "Decorative Metal Railings."


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                                      05 50 00 - 1
       6.   Division 10 Section "Wire Mesh Partitions."
       7.   Division 11 Section “Loading Dock Equipment” for steel curb angles at
            edges of recessed dock leveler pits.


1.2    PERFORMANCE REQUIREMENTS
  A.   Structural Performance of Ladders: Provide ladders capable of withstanding
       the effects of loads and stresses within limits and under conditions specified in
       ANSI A14.3.
  B.   Thermal Movements: Provide exterior metal fabrications that allow for thermal
       movements resulting from the following maximum change (range) in ambient
       and surface temperatures by preventing buckling, opening of joints,
       overstressing of components, failure of connections, and other detrimental
       effects. Base engineering calculation on surface temperatures of materials due
       to both solar heat gain and nighttime-sky heat loss.
       1.    Temperature Change (Range): 120 deg F (67 deg C), ambient; 180
             deg F (100 deg C), material surfaces.


1.3    ACTION SUBMITTALS
  A.   Product Data: For the following:
       1.   Nonslip aggregates and nonslip-aggregate surface finishes.
       2.   Pre-engineered modular support system.
       3.   Paint products.
       4.   Grout.
  B.   Shop Drawings: Detail fabrication and erection of each metal fabrication
       indicated. Include plans, elevations, sections, and details of metal fabrications
       and their connections. Show anchorage and accessory items.
       1.    Provide templates for anchors and bolts specified for installation under
             other Sections.
       2.    Pre-engineered Modular Support System:             Furnish Shop Drawings
             indicating fabrication and installation details for pre-engineered modular
             support system, including connections to building structure, connections
             between components of system, lateral bracing, and attachments to
             other work. Include plans, elevations, sections, details, and relationship
             to other work.


1.4    INFORMATIONAL SUBMITTALS
  A.   Design Data: Include structural analysis data for pre-engineered modular
       support system, including capacities of members, compression members
       (posts), and connectors; signed and sealed by the qualified professional
       engineer responsible for their preparation. Calculations shall be submitted
       concurrently with Shop Drawings.
  B.   Welding Certificates:    Copies of certificates for welding procedures and
       personnel.
  C.   Qualification Data: For firms and persons specified in "Quality Assurance"
       Article to demonstrate their capabilities and experience.   Include lists of
       completed projects with project names and addresses, names and addresses of
       architects and owners, and other information specified.


                                METAL FABRICATIONS
                                    05 50 00 - 2
1.5    QUALITY ASSURANCE
  A.   Fabricator Qualifications: A firm experienced in producing metal fabrications
       similar to those indicated for this Project and with a record of successful in-
       service performance, as well as sufficient production capacity to produce
       required units.
  B.   Source Limitations: Obtain pre-engineered modular support system, including
       all components and accessories, through one source from a single
       manufacturer.
  C.   Metal Bar Grating Standards: Comply with applicable requirements of the
       following:
       1.    Non-Heavy-Duty Metal Bar Gratings: Comply with NAAMM MBG 531,
             "Metal Bar Grating Manual for Steel, Stainless Steel, and Aluminum
             Gratings and Stair Treads.”
  D.   Welding: Qualify procedures and personnel according to the following:
       1.   AWS D1.1, "Structural Welding Code--Steel."
       2.   AWS D1.3, "Structural Welding Code--Sheet Steel."
       3.   Certify that each welder has satisfactorily passed AWS qualification tests
            for welding processes involved and, if pertinent, has undergone
            recertification.


1.6    PROJECT CONDITIONS
  A.   Field Measurements: Where metal fabrications are indicated to fit walls and
       other construction, verify dimensions by field measurements before fabrication
       and indicate measurements on Shop Drawings.               Coordinate fabrication
       schedule with construction progress to avoid delaying the Work.
       1.    Established Dimensions: Where field measurements cannot be made
             without delaying the Work, establish dimensions and proceed with
             fabricating metal fabrications without field measurements. Coordinate
             wall and other contiguous construction to ensure that actual dimensions
             correspond to established dimensions.
       2.    Provide allowance for trimming and fitting at site.


1.7    COORDINATION
  A.   Coordinate installation of anchorages for metal fabrications. Furnish setting
       drawings, templates, and directions for installing anchorages, including sleeves,
       concrete inserts, anchor bolts, and items with integral anchors, that are to be
       embedded in concrete or masonry. Deliver such items to Project site in time
       for installation.
  B.   Coordinate installation of steel weld plates and angles for casting into concrete
       that are specified in this Section but required for work of another Section.
       Deliver such items to Project site in time for installation.
  C.   Coordinate locations and installation of pre-engineered modular support system
       that may interfere with ceiling systems, including lighting, HVAC, and fire
       suppression system.


                               PART 2 - PRODUCTS


                                METAL FABRICATIONS
                                    05 50 00 - 3
2.1    MANUFACTURERS
  A.   Acceptable Manufacturers: Subject to compliance with requirements, provide
       products by one of the following:
       1.   Metal Bar Grating:
            a.    Alabama Metal Industries Corporation.
            b.    All American Grating, Inc.
            c.    Barnett/Bates Corp.
            d.    IKG Industries; a Harsco Company.
            e.    Ohio Gratings, Inc.
            f.    Seidelhuber Metal Products, Inc.
       2.   Pre-engineered Modular Support System:
            a.    Hilti, Inc.
            b.    Substitutions: None permitted.


2.2    METALS, GENERAL
  A.   Metal Surfaces, General:    For metal fabrications exposed to view in the
       completed Work, provide materials with smooth, flat surfaces without
       blemishes. Do not use materials with exposed pitting, seam marks, roller
       marks, rolled trade names, or roughness.


2.3    FERROUS METALS
  A.   Steel Plates, Shapes, and Bars: ASTM A 36/A 36M.
  B.   Rolled-Steel Floor Plate: ASTM A 786/A 786M, rolled from plate complying with
       ASTM A 36/A 36M or ASTM A 283/A 283M, Grade C or D.
  C.   Wire Rod for Grating Crossbars: ASTM A 510 (ASTM A 510M).
  D.   Steel Tubing: Cold-formed steel tubing complying with ASTM A 500.
  E.   Steel Pipe: ASTM A 53, standard weight (Schedule 40), unless another weight
       is indicated or required by structural loads.
  F.   Malleable-Iron   Castings:       ASTM A 47,     Grade 32510     (ASTM A 47M,
       Grade 22010).
  G.   Gray-Iron Castings:      ASTM A 48, Class 30(ASTM A 48M, Class 200), unless
       another class is indicated or required by structural loads.
  H.   Cast-in-Place Anchors in Concrete: Anchors of type indicated below, fabricated
       from corrosion-resistant materials capable of sustaining, without failure, the
       load imposed within a safety factor of 4, as determined by testing per
       ASTM E 488, conducted by a qualified independent testing agency.
       1.    Threaded or wedge type; galvanized ferrous castings, either
             ASTM A 47(ASTM A 47M) malleable iron or ASTM A 27/A 27M cast steel.
             Provide bolts, washers, and shims as needed, hot-dip galvanized per
             ASTM A 153/A 153M.
  I.   Welding Rods and Bare Electrodes: Select according to AWS specifications for
       metal alloy welded.




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                                   05 50 00 - 4
2.4    PRE-ENGINEERED MODULAR SUPPORT SYSTEM
  A.   General: Factory-formed, field-assembled, modular support system; designed
       for attachment to either steel or concrete building structure, to serve as
       support for a variety of building components and systems that may not
       otherwise be indicated to be attached directly to building structure. System
       shall include the following:
       1.     Girders: Nominal 3 1/2-inch by 10 gage (90 mm x 3.5 mm), and 4 3/4-
              inch by 8 gage (120 mm x 4.0 mm) square galvanized steel tube, with
              continuous row of holes spaced at 1 15/16 inches (50 mm) on center for
              the entire length of each side to receive intersecting members, support
              system fasteners, and other attachment accessories.
       2.     Manufacturer’s complete range of connectors for attachment to structural
              steel building frame members.
       3.     Manufacturer’s complete range of connectors for attachment to structural
              concrete building frame members.
       4.     Manufacturer’s complete range of girder-to-girder connections,
              transitions, couplings, extensions, and cantilever braces.
       5.     Manufacturer’s complete line of attachment accessories, including U-
              bolts, pipe clamps, threaded rods, spacers, plastic end caps, etc.
       6.     System shall be fully compatible with and designed to directly interface
              with slotted channel framing as specified in Division 05 Section
              “Healthcare Metal Supports.”
  B.   Basis of Design Product:    “MI Modular Support System” as manufactured by
       Hilti, Inc.


2.5    FASTENERS
  A.   General: Provide Type 304 or 316 stainless-steel fasteners for exterior use and
       zinc-plated fasteners with coating complying with ASTM B 633, Class Fe/Zn 5,
       where built into exterior walls. Select fasteners for type, grade, and class
       required.
  B.   Bolts   and   Nuts:     Regular    hexagon-head       bolts,       ASTM A 307,
       Grade A(ASTM F 568M,   Property     Class 4.6);      with         hex    nuts,
       ASTM A 563(ASTM A 563M); and, where indicated, flat washers.
  C.   Anchor Bolts: ASTM F 1554, Grade 36.
       1.   Provide hot-dip or mechanically deposited, zinc-coated anchor bolts
            where item being fastened is indicated to be galvanized.
  D.   Eyebolts: ASTM A 489.
  E.   Machine Screws: ASME B18.6.3(ASME B18.6.7M).
  F.   Lag Bolts: ASME B18.2.1(ASME B18.2.3.8M).
  G.   Wood Screws: Flat head, carbon steel, ASME B18.6.1.
  H.   Plain Washers: Round, carbon steel, ASME B18.22.1(ASME B18.22M).
  I.   Lock   Washers:         Helical,         spring     type,     carbon      steel,
       ASME B18.21.1(ASME B18.21.2M).
  J.   Expansion Anchors: Anchor bolt and sleeve assembly of material indicated
       below with capability to sustain, without failure, a load equal to six times the



                                  METAL FABRICATIONS
                                      05 50 00 - 5
       load imposed when installed in unit masonry and equal to four times the load
       imposed when installed in concrete, as determined by testing per ASTM E 488,
       conducted by a qualified independent testing agency.
       1.    Material:   Carbon-steel components zinc-plated to comply with
             ASTM B 633, Class Fe/Zn 5.
  K.   Toggle Bolts: FS FF-B-588, tumble-wing type, class and style as needed.


2.6    MISCELLANEOUS MATERIALS
  A.   Welding Rods and Bare Electrodes: Select according to AWS specifications for
       metal alloy welded.
  B.   Shop Primer for Ferrous Metal: Fast-curing, lead- and chromate-free, universal
       modified-alkyd primer complying with performance requirements in FS TT-P-
       664; selected for good resistance to normal atmospheric corrosion,
       compatibility with finish paint systems indicated, and capability to provide a
       sound foundation for field-applied topcoats despite prolonged exposure.
  C.   Zinc-Rich Shop Primer for Ferrous Metal: Organic zinc-rich primer, complying
       with SSPC-Paint 20 and compatible with topcoat.
       1.    Products: Subject to compliance with requirements, provide one of the
             following:
             a.    Carboline 621; Carboline Company.
             b.    Aquapon Zinc-Rich Primer 97-670; PPG Industries, Inc.
             c.    Tneme-Zinc 90-97; Tnemec Company, Inc.
  D.   Galvanizing Repair Paint: High-zinc-dust-content paint for regalvanizing welds
       in steel, complying with SSPC-Paint 20.
  E.   Bituminous Paint: Cold-applied asphalt mastic complying with SSPC-Paint 12,
       except containing no asbestos fibers, or cold-applied asphalt emulsion
       complying with ASTM D 1187.
  F.   Nonshrink, Metallic Grout:       Factory-packaged, ferrous-aggregate grout
       complying with ASTM C 1107, specifically recommended by manufacturer for
       heavy-duty loading applications.
  G.   Nonshrink, Nonmetallic Grout: Factory-packaged, nonstaining, noncorrosive,
       nongaseous grout complying with ASTM C 1107. Provide grout specifically
       recommended by manufacturer for interior and exterior applications.
  H.   Concrete Materials and Properties: Comply with requirements in Division 03
       Section "Cast-in-Place Concrete" for normal-weight, air-entrained, ready-mix
       concrete with a minimum 28-day compressive strength of 3000 psi(20 MPa),
       unless otherwise indicated.


2.7    FABRICATION, GENERAL
  A.   Shop Assembly: Preassemble items in shop to greatest extent possible to
       minimize field splicing and assembly. Disassemble units only as necessary for
       shipping and handling limitations. Use connections that maintain structural
       value of joined pieces. Clearly mark units for reassembly and coordinated
       installation.
  B.   Shear and punch metals cleanly and accurately. Remove burrs.



                               METAL FABRICATIONS
                                   05 50 00 - 6
  C.   Ease exposed edges to a radius of approximately 1/32 inch(1 mm), unless
       otherwise indicated. Form bent-metal corners to smallest radius possible
       without causing grain separation or otherwise impairing work.
  D.   Weld corners and seams continuously to comply with the following:
       1.   Use materials and methods that minimize distortion and develop strength
            and corrosion resistance of base metals.
       2.   Obtain fusion without undercut or overlap.
       3.   Remove welding flux immediately.
       4.   At exposed connections, finish exposed welds and surfaces smooth and
            blended so no roughness shows after finishing and contour of welded
            surface matches that of adjacent surface.
  E.   Provide for anchorage of type indicated; coordinate with supporting structure.
       Fabricate and space anchoring devices to secure metal fabrications rigidly in
       place and to support indicated loads.
  F.   Cut, reinforce, drill, and tap metal fabrications as indicated to receive finish
       hardware, screws, and similar items.
  G.   Fabricate joints that will be exposed to weather in a manner to exclude water,
       or provide weep holes where water may accumulate.
  H.   Allow for thermal movement resulting from the following maximum change
       (range) in ambient and surface temperatures by preventing buckling, opening
       up of joints, overstressing of components, failure of connections, and other
       detrimental effects. Base engineering calculation on surface temperatures of
       materials due to both solar heat gain and nighttime-sky heat loss.
       1.    Temperature Change (Range):        120 deg F(67 deg C), ambient; 180
             deg F(100 deg C), material surfaces.
  I.   Form exposed work true to line and level with accurate angles and surfaces and
       straight sharp edges.
  J.   Remove sharp or rough areas on exposed traffic surfaces.
  K.   Form exposed connections with hairline joints, flush and smooth, using
       concealed fasteners where possible. Use exposed fasteners of type indicated
       or, if not indicated, Phillips flat-head (countersunk) screws or bolts. Locate
       joints where least conspicuous.


2.8    STEEL LADDERS
  A.   General: Fabricate ladders for locations shown, with dimensions, spacings,
       details, and anchorages as indicated.
       1.    Comply with ANSI A14.3, unless otherwise indicated.
       2.    For elevator pit ladders, comply with ASME A17.1.
  B.   Siderails: Continuous, 1/2-by-2-1/2-inch(12-by-64-mm) steel flat bars, with
       eased edges, spaced 18 inches(457 mm) apart.
  C.   Bar Rungs:    3/4-inch-(19-mm-) diameter steel bars, spaced 12 inches(300
       mm) o.c.
  D.   Fit rungs in centerline of side rails; plug-weld and grind smooth on outer rail
       faces.




                                METAL FABRICATIONS
                                    05 50 00 - 7
  E.   Support each ladder at top and bottom and not more than 60 inches(1500
       mm) o.c. with welded or bolted steel brackets. Size brackets to support design
       loads specified in ANSI A14.3.
  F.   Provide nonslip surfaces on top of each rung by coating with abrasive material
       metallically bonded to rung by a proprietary process.
       1.    Products: Subject to compliance with requirements, provide one of the
             following:
             a.    Mebac; IKG Borden.
             b.    SLIP-NOT; W. S. Molnar Company.
  G.   Galvanize ladders, including brackets and fasteners, in the following locations:
       1.   Exterior.
       2.   Interior, where indicated.


2.9    LADDER SAFETY CAGES
  A.   General: Fabricate ladder safety cages to comply with ANSI A14.3. Assemble
       by welding or riveting.
  B.   Primary Hoops: 5/16-by-4-inch(8-by-100-mm) steel flat bar hoops. Provide at
       tops and bottoms of cages and spaced not more than 20 feet(6 m) o.c.
  C.   Secondary Intermediate Hoops: 5/16-by-2-inch(8-by-50-mm) steel flat bar
       hoops, spaced not more than 48 inches(1200 mm) o.c. between primary
       hoops.
  D.   Vertical Bars: 5/16-by-2-inch(8-by-50-mm) steel flat bars secured to each
       hoop, spaced approximately 9 inches(230 mm) o.c.
  E.   Fasten assembled safety cage to ladder rails and adjacent construction by
       welding or riveting, unless otherwise indicated.
  F.   Galvanize ladder safety cages, including fasteners, in the following locations:
       1.   Exterior.
       2.   Interior, where indicated.


2.10   STEEL SHIP'S LADDERS
  A.   Provide ship's ladders where indicated. Fabricate of open-type construction
       with structural-steel channel or steel plate stringers, steel pipe handrails, and
       steel bar grating treads, unless otherwise indicated. Provide brackets and
       fittings for installation.
       1.     Comply with applicable requirements in Division 05 Section "Pipe and
              Tube Railings" for steel pipe railings.
  B.   Galvanize ship's ladders, including brackets and fasteners, in the following
       locations:
       1.    Exterior.
       2.    Interior, where indicated.


2.11   LOOSE BEARING AND LEVELING PLATES
  A.   Provide loose bearing and leveling plates for steel items bearing on masonry or
       concrete construction. Drill plates to receive anchor bolts and for grouting.



                                 METAL FABRICATIONS
                                     05 50 00 - 8
  B.   Prime plates with zinc-rich primer.


2.12   LOOSE STEEL LINTELS
  A.   Fabricate loose structural-steel lintels from steel angles and shapes of size
       indicated for openings and recesses in masonry walls and partitions at locations
       indicated.
  B.   Weld adjoining members together to form a single unit where indicated.
  C.   Size loose lintels to provide bearing length at each side of openings equal to
       one-twelfth of clear span, but not less than 8 inches(200 mm), unless
       otherwise indicated.
  D.   Galvanize loose steel lintels located in exterior walls.


2.13   SHELF ANGLES
  A.   Fabricate shelf angles from steel angles of sizes indicated and for attachment
       to concrete framing. Provide horizontally slotted holes to receive 3/4-inch(19-
       mm) bolts, spaced not more than 6 inches(150 mm) from ends and 24
       inches(600 mm) o.c., unless otherwise indicated.
  B.   For cavity walls, provide vertical channel brackets to support angles from
       backup masonry and concrete. Align expansion joints in angles with indicated
       control and expansion joints in cavity-wall exterior wythe.
  C.   Galvanize shelf angles to be installed in exterior walls.
  D.   Furnish wedge-type concrete inserts, complete with fasteners, to attach shelf
       angles to cast-in-place concrete.


2.14   STEEL WELD PLATES AND ANGLES
  A.   Provide steel weld plates and angles not specified in other Sections, for items
       supported from concrete construction as needed to complete the Work.
       Provide each unit with not less than two integrally welded steel strap anchors
       for embedding in concrete.


2.15   STRUCTURAL-STEEL DOOR FRAMES
  A.   Fabricate structural-steel door frames from steel shapes, plates, and bars of
       size and to dimensions indicated, fully welded together, with 5/8-by-1-1/2-inch
       (16-by-38-mm) steel channel stops, unless otherwise indicated. Plug-weld
       built-up members and continuously weld exposed joints. Secure removable
       stops to frame with countersunk machine screws, uniformly spaced at not more
       than 10 inches (250 mm) o.c. Reinforce frames and drill and tap as necessary
       to accept finish hardware.
       1.    Provide with integrally welded steel strap anchors for securing door
             frames into adjoining concrete or masonry.
  B.   Extend bottom of frames to floor elevation indicated with steel angle clips
       welded to frames for anchoring frame to floor with expansion shields and bolts.
  C.   Galvanize exterior steel frames.



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2.16   ELEVATOR SUMP PIT GRATING
  A.   Fabricate grating sections in shop to greatest extent possible to minimize field
       splicing and assembly. Disassemble units only as necessary for shipping and
       handling limitations. Use connections that maintain structural value of joined
       pieces. Clearly mark units for reassembly and coordinated installation.
  B.   Form from materials of size, thickness, and shapes indicated, but not less than
       that needed to support indicated loads.
  C.   Metal Bar-Grating: Form elevator sump pit cover to configurations shown from
       metal bar grating; fabricate to comply with NAAMM MBG 531, "Metal Bar
       Grating Manual."
       1.    Fabricate from welded steel grating with 1-1/4-by-3/16-inch (32-by-5-
             mm) bearing bars at 15/16 inch (24 mm) o.c. and crossbars at 4 inches
             (100 mm) o.c., NAAMM designation: W-15-4 (1-1/4 x 3/16) STEEL.
       2.    Surface: Serrated.
       3.    Finish: Galvanized.
  D.   Removable Grating Sections: Fabricate with banding bars attached by welding
       to entire perimeter of each section. Include anchors and fasteners of type
       indicated or, if not indicated, as recommended by manufacturer for attaching to
       supports.
  E.   Provide for anchorage of type indicated; coordinate with supporting structure.
       Fabricate and space the anchoring devices to secure gratings, frames, and
       supports rigidly in place and to support indicated loads.
  F.   Fabricate cutouts in grating sections for penetrations indicated.    Arrange
       cutouts to permit grating removal without disturbing items penetrating
       gratings.
       1.    Edge-band openings in grating that interrupt four or more bearing bars
             with bars of same size and material as bearing bars.
  G.   Frames and Supports for Metal Gratings: Fabricate from metal shapes, plates,
       and bars of welded construction to sizes, shapes, and profiles indicated and as
       necessary to receive gratings. Miter and weld connections for perimeter angle
       frames. Cut, drill, and tap units to receive hardware and similar items.


2.17   MISCELLANEOUS FRAMING AND SUPPORTS
  A.   General: Provide steel framing and supports that are not a part of structural-
       steel framework as necessary to complete the Work.
  B.   Fabricate units from structural-steel shapes, plates, and bars of welded
       construction, unless otherwise indicated. Fabricate to sizes, shapes, and
       profiles indicated and as necessary to receive adjacent construction retained by
       framing and supports. Cut, drill, and tap units to receive hardware, hangers,
       and similar items.
       1.     Where units are indicated to be cast into concrete or built into masonry,
              equip with integrally welded steel strap anchors 1-1/4 inches(32 mm)
              wide by 1/4 inch(6 mm) thick by 8 inches(200 mm) long at 24
              inches(600 mm) o.c., unless otherwise indicated.
       2.     Furnish inserts if units must be installed after concrete is placed.
       3.     Refer to Section 05451 for medical supports.



                                METAL FABRICATIONS
                                   05 50 00 - 10
  C.   Fabricate supports for operable partitions as follows:
       1.    Beams: Continuous steel shapes of sizes indicated with attached bearing
             plates, anchors, and braces as indicated. Drill bottom flanges of beams
             to receive partition track hanger rods; locate holes where indicated on
             operable partition Shop Drawings.
  D.   Fabricate supports for ceiling-hung toilet partitions as follows:
       1.    Continuous steel shapes of sizes indicated with attached bearing plates,
             anchors, and braces as indicated. Drill bottom flanges of beams to
             receive toilet partition hanger bolts; locate holes where indicated on toilet
             partition Shop Drawings.
  E.   Galvanize miscellaneous framing and supports where indicated.
  F.   Contractor’s Option: In lieu fabricating miscellaneous framing and supports
       from steel shapes, plates, and bars as indicated above, Contractor may elect to
       construct these items utilizing pre-engineered modular support system
       components as specified in Article 2.4.


2.18   MISCELLANEOUS STEEL TRIM
  A.   Unless otherwise indicated, fabricate units from structural-steel shapes, plates,
       and bars of profiles shown with continuously welded joints, and smooth
       exposed edges. Miter corners and use concealed field splices where possible.
  B.   Provide cutouts, fittings, and anchorages as needed to coordinate assembly
       and installation with other work.     Provide anchors, welded to trim, for
       embedding in concrete or masonry construction, spaced not more than 6
       inches(150 mm) from each end, 6 inches(150 mm) from corners, and 24
       inches(600 mm) o.c., unless otherwise indicated.
  C.   Galvanize miscellaneous steel trim in the following locations:
       1.   Exterior.
       2.   Interior, where indicated.


2.19   PIPE GUARDS
  A.   Provide pipe guards of 3-by-3-by-5/16-inch(76-by-76-by-8-mm) steel angles,
       extending from floor to 42 inches(1100 mm) above floor, with 3/8-inch(10-
       mm) steel baseplates for bolting to floor. Provide at least two vertical angles
       at each location, except at internal corners where one may be used. Connect
       tops of angles and anchor to wall or column with 1/4-by-2-inch(6-by-50-mm)
       steel strap braces welded to angles and bolted to wall.
  B.   Galvanize pipe guards after fabrication.


2.20   PIPE BOLLARDS
  A.   Fabricate pipe bollards from Schedule [40] [80] steel pipe.
       1.    Cap bollards with 1/4-inch- (6.4-mm-) thick steel plate.
       2.    Where bollards are indicated to receive push-button controls for door
             operators, provide necessary cutouts for push-button controls and hole
             for wire.




                                 METAL FABRICATIONS
                                    05 50 00 - 11
  B.    Fabricate bollards with 3/8-inch- (9.5-mm-) thick steel baseplates for bolting to
        concrete slab. Drill baseplates at all 4 corners for 3/4-inch (19-mm) anchor
        bolts.
        1.     Where bollards are to be anchored to sloping concrete slabs, angle
               baseplates for plumb alignment of bollards.
  C.    Fabricate sleeves for bollard anchorage from steel [pipe] [or] [tubing] with
        1/4-inch- (6.4-mm-) thick steel plate welded to bottom of sleeve. Make
        sleeves not less than 8 inches (200 mm) deep and 3/4 inch (19 mm) larger
        than OD of bollard.
  D.    Fabricate internal sleeves for removable bollards from Schedule 40 steel pipe
        or 1/4-inch (6.4-mm) wall-thickness steel tubing with an OD approximately
        1/16 inch (1.5 mm) less than ID of bollards. Match drill sleeve and bollard for
        3/4 inch (19 mm) steel machine bolt.

The following paragraph is typically used in parking garages.

  E.    Railing Cable:
        1.    Prestressing Steel: Seven-wire stress-relieved strand for prestressed
              concrete, manufactured in accordance with ASTM A 416 and free from
              corrosion, with a guaranteed minimum tensile strength of 270 ksi.
              a.    Nominal Diameter: 1/2 inch.
              b.    Area: 0.153 square inches.
              c.    Modulus of Elasticity: 29.000 ksi (assumed).
              d.    Minimum Ultimate Strength: 41.3 kips.
        2.    Anchorages and Bearing Plates: Meet the minimum requirements set
              forth in ACI Standard Building Code Requirements for Reinforced
              Concrete (ACI-318-83), or Prestressed Concrete Institute "PCI Standard
              Building for Prestressed Concrete".
              a.    Bearing Plate Materials: 42,000 psi minimum yield unless noted
                    otherwise.
              b.    Anchorhead: C1050 Special Bar Quality. HR Normalized
              c.    Wedge: AISI C11 L 17 or equal
              d.    Cast Anchorage: ASTM A 536 Gr. 80-60-03.
        3.    Strand Coating: Per ASTM A 475.
              a.    Acceptable Manufacturer: VSL Corporation.


2.21    FINISHES, GENERAL
  A.    Comply with NAAMM's "Metal Finishes Manual for Architectural and Metal
        Products" for recommendations for applying and designating finishes.
  B.    Finish metal fabrications after assembly.


2.22    STEEL AND IRON FINISHES
  A.    Galvanizing: Hot-dip galvanize items as indicated to comply with applicable
        standard listed below:
        1.   ASTM A 123, for galvanizing steel and iron products.
        2.   ASTM A 153/A 153M, for galvanizing steel and iron hardware.
  B.    Preparation for Shop Priming: Prepare uncoated ferrous-metal surfaces to
        comply with minimum requirements indicated below for SSPC surface-


                                 METAL FABRICATIONS
                                    05 50 00 - 12
       preparation specifications and environmental exposure conditions of installed
       metal fabrications:
       1.   Exteriors (SSPC Zone 1B): SSPC-SP 6/NACE No. 3, "Commercial Blast
            Cleaning."
       2.   Interiors (SSPC Zone 1A): SSPC-SP 3, "Power Tool Cleaning."
  C.   Ladders in Elevator Pits: Provide zinc-rich primer.
  D.   Apply shop primer to uncoated surfaces of metal fabrications, except those
       with galvanized finishes and those to be embedded in concrete, sprayed-on
       fireproofing, or masonry, unless otherwise indicated. Comply with SSPC-PA 1,
       "Paint Application Specification No. 1," for shop painting.
       1.    Stripe paint corners, crevices, bolts, welds, and sharp edges.


                               PART 3 - EXECUTION


3.1    INSTALLATION, GENERAL
  A.   Cutting, Fitting, and Placement: Perform cutting, drilling, and fitting required
       for installing metal fabrications. Set metal fabrications accurately in location,
       alignment, and elevation; with edges and surfaces level, plumb, true, and free
       of rack; and measured from established lines and levels.
  B.   Fit exposed connections accurately together to form hairline joints. Weld
       connections that are not to be left as exposed joints but cannot be shop welded
       because of shipping size limitations. Do not weld, cut, or abrade surfaces of
       exterior units that have been hot-dip galvanized after fabrication and are for
       bolted or screwed field connections.
  C.   Field Welding: Comply with the following requirements:
       1.    Use materials and methods that minimize distortion and develop strength
             and corrosion resistance of base metals.
       2.    Obtain fusion without undercut or overlap.
       3.    Remove welding flux immediately.
       4.    At exposed connections, finish exposed welds and surfaces smooth and
             blended so no roughness shows after finishing and contour of welded
             surface matches that of adjacent surface.
  D.   Fastening to In-Place Construction: Provide anchorage devices and fasteners
       where necessary for securing metal fabrications to in-place construction.
       Include threaded fasteners for concrete and masonry inserts, toggle bolts,
       through-bolts, lag bolts, wood screws, and other connectors.
  E.   Provide temporary bracing or anchors in formwork for items that are to be built
       into concrete, masonry, or similar construction.
  F.   Protection of Dissimilar Materials: When dissimilar materials come in contact,
       provide bituminous paint protective coating. Conditions include, but are not
       limited to:
       1.    Ferrous metal to aluminum.
       2.    Ferrous metal or aluminum in contact with concrete.
       3.    Steel to copper.


3.2    SETTING BEARING AND LEVELING PLATES


                                METAL FABRICATIONS
                                   05 50 00 - 13
  A.   Clean concrete and masonry bearing surfaces of bond-reducing materials, and
       roughen to improve bond to surfaces. Clean bottom surface of plates.
  B.   Set bearing and leveling plates on wedges, shims, or leveling nuts. After
       bearing members have been positioned and plumbed, tighten anchor bolts. Do
       not remove wedges or shims but, if protruding, cut off flush with edge of
       bearing plate before packing with grout.
       1.    Use nonshrink grout, either metallic or nonmetallic, in concealed locations
             where not exposed to moisture; use nonshrink, nonmetallic grout in
             exposed locations, unless otherwise indicated.
       2.    Pack grout solidly between bearing surfaces and plates to ensure that no
             voids remain.


3.3    INSTALLING METAL BAR GRATINGS
  A.   General: Install gratings to comply with recommendations of referenced metal
       bar grating standards that apply to grating types and bar sizes indicated,
       including installation clearances and standard anchoring details.
  B.   Cutting, Fitting, and Placement: Perform cutting, drilling, and fitting required
       for installing gratings.   Set units accurately in location, alignment, and
       elevation; measured from established lines and levels and free of rack.
  C.   Attach removable units to supporting members with type and size of clips and
       fasteners indicated or, if not indicated, as recommended by grating
       manufacturer for type of installation conditions shown.


3.4    INSTALLING MISCELLANEOUS FRAMING AND SUPPORTS
  A.   General: Install framing and supports to comply with requirements of items
       being supported, including manufacturers' written instructions and
       requirements indicated on Shop Drawings, if any.
  B.   Anchor supports for operable partitions securely to and rigidly brace from
       building structure.
  C.   Anchor supports for ceiling-hung toilet partitions securely to and rigidly brace
       from building structure.
  D.   Pre-engineered Modular Support System: Install in accordance with approved
       Shop Drawings and manufacturer’s installation instructions.
       1.   Attachment Considerations: Account for site peculiarities and expansion
            and contraction movements so there is no possibility of loosening,
            weakening and fracturing connection between units and building structure
            or between components themselves.
       2.   Make modifications only to meet field conditioned and ensure fitting of
            system components.
       3.   Rigidly fix and brace support structure against sway.
       4.   Accommodate allowable tolerances and deflections for structural
            members in installation.
       5.   Coordinate with reflected ceiling plan and other items indicated to be
            placed in or above ceiling to ensure support system does not interfere
            with or dislocate other items.




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                                   05 50 00 - 14
3.5    INSTALLING PIPE GUARDS
  A.   Install pipe guards at exposed vertical pipes in parking garage where not
       protected by curbs or other barriers. Install by bolting to floor and wall or
       column with drilled-in expansion anchors.


3.6    INSTALLING PIPE BOLLARDS
  A.   Bollards with Core-Drilled Holes: Anchor bollards in concrete in formed or
       core-drilled holes not less than 8 inches (200 mm) deep and 3/4 inch(19 mm)
       greater than OD of bollard. After bollards have been inserted into holes, fill
       annular space surrounding bollard solidly with nonshrink, nonmetallic grout,
       mixed and placed to comply with grout manufacturer's written instructions.
       Slope grout up approximately 1/8 inch(3 mm) toward bollard.
  B.   Bollards with Footings: Anchor bollards in place with concrete footings. Center
       and align bollards in holes 3 inches (75 mm) above bottom of excavation.
       Place concrete and vibrate or tamp for consolidation. Support and brace
       bollards in position until concrete has cured.
  C.   Removable Bollards: Anchor internal sleeves for removable bollards in place
       with concrete footings. Center and align sleeves in holes 3 inches (75 mm)
       above bottom of excavation.       Place concrete and vibrate or tamp for
       consolidation. Support and brace sleeves in position until concrete has cured.
  D.   Place removable bollards over internal sleeves and secure with 3/4-inch (19-
       mm) machine bolts and nuts. After tightening nuts, drill holes in bolts for
       inserting padlocks. Owner will furnish padlocks.
  E.   Fill bollards solidly with concrete, mounding top surface to shed water.
       1.     Do not fill removable bollards with concrete.


3.7    ADJUSTING AND CLEANING
  A.   Touchup Painting:    Immediately after erection, clean field welds, bolted
       connections, and abraded areas of shop paint, and paint exposed areas with
       the same material as used for shop painting to comply with SSPC-PA 1 for
       touching up shop-painted surfaces.
       1.   Apply by brush or spray to provide a minimum 2.0-mil(0.05-mm) dry film
            thickness.
  B.   Touchup Painting:   Cleaning and touchup painting of field welds, bolted
       connections, and abraded areas of shop paint are specified in Division 09
       Section "Painting."
  C.   Galvanized Surfaces: Clean field welds, bolted connections, and abraded areas
       and repair galvanizing to comply with ASTM A 780.




                                 END OF SECTION




                                 METAL FABRICATIONS
                                    05 50 00 - 15

								
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