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					TABLE OF CONTENTS
SECTION 206 STRUCTURAL DESIGN................................................................................... 2

206.1 FOUNDATION INVESTIGATION ......................................................................................... 2 206.2 W ATERWAYS INVESTIGATION ......................................................................................... 2 206.2.1 Introduction ............................................................................................................. 2 206.2.2 Hydrology ............................................................................................................... 3 206.2.3 Hydraulics ............................................................................................................... 3 206.2.4 Waterways Investigation Report ............................................................................ 3 206.3 BRIDGE DESIGN ............................................................................................................ 3 206.3.1 Introduction ............................................................................................................. 3 206.3.2 Structural Design Standards .................................................................................. 4 206.3.3 Preliminary Design ............................................................................................... 11 206.3.4 Full Design Calculations ....................................................................................... 12 206.3.5 Design Verification ............................................................................................... 12 206.3.6 Lighting Design ..................................................................................................... 12 206.3.7 Design Summary and Final Design Report .......................................................... 12 206.3.8 Bridge Drawings ................................................................................................... 13 206.3.9 Design of Temporary Works ................................................................................ 14 206.3.10 Structural Design Models ................................................................................. 14 206.3.11 Onsite Design Check ....................................................................................... 14 206.4 RETAINING W ALLS ...................................................................................................... 14 206.5 SIGN GANTRIES AND CANTILEVER SIGNS ..................................................................... 15 APPENDIX 206.1 – BRIDGE DESIGN CRITERIA ........................................................................ 16

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SECTION 206

STRUCTURAL DESIGN

The Principal will appoint a Bridge Engineer to be the liaison officer for the Project. To ensure the Project fully meets the Principal's requirements this officer shall be kept fully informed on all matters and aspects of the work. 206.1 Foundation Investigation

The Consultant shall determine and carry out all foundation investigation considered necessary for the design of the Works including any testing required, either in-situ or laboratory. Foundation Investigation for bridge works shall be carried out in accordance with Part 3 of AS 5100 Bridge Design Code. Borehole logging shall be carried out by an experienced engineering geologist or geotechnical engineer. Borehole Information Drawings shall be prepared to present the results of the foundation investigation and shall be included in the Contract Documents as "Information for Tenderers" (refer Section 209 Tender Documentation). The results of all foundation investigation work shall be made available to the Principal‟s Representative. The core samples must be kept safely for a period of 5 years minimum and be accessible to the construction tenderers. 206.2 Waterways Investigation

<The Waterways Investigation described below is for fairly extensive waterway analysis. The investigation could be less than that, or not required, or may have been done by the Principal.> <If the waterway investigation is extensive and/or critical, it may be necessary to have a review earlier than the 85% review.> <Provide any appropriate details to suit.> <Specify the serviceability level for the particular Project which may also need to conform to Water Corporation, or river authority requirements, and/or have backwater limitations.> 206.2.1 Introduction Waterways investigation shall be in accordance with the AUSTROADS publication, "Waterway Design - A Guide to the Hydraulic Design of Bridges, Culverts and Floodways", and "Australian Rainfall and Runoff – A Guide to Flood Estimation" and shall be carried out only by companies satisfying the requirements of the “Eligibility To Tender” Special Conditions of Tendering Clause 1.

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206.2.2 Hydrology The Consultant shall carry out flow estimation for Average Recurrence Intervals (ARIs) of 2, 5, 10, 20, 50, and 100 years. Acceptable flow estimation techniques, including computer modelling, shall be used. Design flows are to be checked against historical flood events, if available. Where the waterways are gauged, flood frequency analysis techniques are to be used. Before commencement of the analysis, the Consultant shall obtain from the Principal‟s Representative any available flood data at the site. 206.2.3 Hydraulics Hydraulic analysis shall be carried out to compute the following:
      

bridge/culvert/floodway size, type and configuration; stage/discharge and backwater curves; velocities in the natural channel and through the structure; estimated depth of scour; scour protection, if required; dimensions, locations and sizes of guide and levee banks and other associated works; possible modes of failure under overtopping conditions.

The serviceability for Highways and Main Roads shall conform to AUSTROADS standards and shall be confirmed by Principal‟s Representative for any site specific requirements. In general, bridges shall pass the 50 year flow and culverts and floodways be passable for the 20 year flow. 206.2.4 Waterways Investigation Report The Consultant shall prepare a Waterways Report incorporating all details of hydrology, hydraulics and information required to complete the Design Criteria Sheet at Appendix 206.1. 206.3 Bridge Design

206.3.1 Introduction The proposed bridge will cross ................................................................................ The proposed superstructure will be ............. metres wide between kerbs and will be in the order of ............. metres long. The design Consultant must satisfy the requirements of the “Eligibility To Tender” Special Conditions of Tendering Clause 1. The design requires the involvement of suitably qualified and experienced personnel in an office in Perth, Western Australia, to facilitate technical review by the Principal's Representative for the duration of the design contract.

<Complete to suit>
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<If any drilling already carried out, insert suitable reference, and provide details in suitable format, and where information is located>. The scope of the bridge design work to be carried out under this Commission shall include:       Preliminary design. Final design. Design verification. Submission of design reports. Design summary and load rating. Minor works contracts.

<Example only - amend as required> The Principal‟s Representative will provide to the Consultant, in both hard copy and electronic form, copies of standard details and standard designs as appropriate for this Project. Refer also to Structures Engineering Branch‟s Document No. 3912/02/01-17, Bridge Branch Design Information Manual, and Document No. 3912/03/00, Bridge Branch Design Manual. 206.3.2 Structural Design Standards (i) The bridge shall be designed in accordance with the Australian Bridge Design Code AS5100 (Code), as modified below. (ii) The numbers used in this section refer to clause numbers as used in various parts of the Code and are prefixed with BDC and a number to signify the part number of Bridge Design Code AS 5100. BDC 1 - SCOPE AND GENERAL PRINCIPLES BDC 1 - 9.3 Bridges Over Navigable Waterways Dimensional clearances for the bridge are XX m horizontal and XX m vertical. BDC 1 - 9.4 Road Bridge Carriageway Widths The bridge width must be based on the following minimum configuration: No. of lanes: XX Cross section: XX m shoulder + XX x XX m lanes + XX m median + XX x XX m lanes + XX m shoulder Shared path: XX m on XX side of bridge Footpath: XX m on XX side of bridge BDC 1 - 9.6 Horizontal Clearance To Substructure Components Of Bridges Over Roadways

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The face of any support, apart from columns located in the median, must be set back from the ultimate edge of the nearest traffic lane in accordance with Figure 12.1 in Main Roads Structures Engineering Branch‟s Document No. 3912/02-1 „Bridge Branch Design Information‟. BDC 1 - 9.7 Vertical Clearance Over Roadways The minimum unobstructed vertical clearance, with due allowance for settlement and for the addition of a further 50 mm of asphalt, must not be less than XX m. BDC 1 - 9.11 and 9.13 Pedestrian Bridges And Bicycle Paths

The clear width between handrails must be XX m. Vertical clearance over roadways, with due allowance for settlement and for the addition of a further 50 mm asphalt, must not be less than XX m. Design of shared path bridges must cater for the disabled in accordance with Main Roads‟ Disability Service Plan and AS1428 Design for Access and Mobility. BDC 1 - 9.12 Pedestrian Subways (Dual Use Underpasses) Design of shared path underpasses must have a clear width of at least XX m at the base, a height of not less than XX m, a width at the widest part of not less than XX m and a cross sectional area of not less than XX m2. Design must also cater for the disabled in accordance with Main Roads‟ Disability Service Plan and AS1428 Design for Access and Mobility. BDC 1 - 10 Road Traffic Barriers The Bridge Design Code AS 5100 shall be used for the design of all medium level performance road bridge traffic barriers. Main Roads‟ standard barriers that are deemed to comply with the respective Code Performance Levels shall be used. BDC 1 - 11.3 Collision From Railway Traffic Where possible, bridges over rail shall comprise a single clear span. Collision loads as defined in the Code shall be applied to all support elements (piers and abutments) in accordance with Code requirements. Abutment walls shall not be box type but near linear (parallel to railway alignment in plan) to remove the danger to the train from a head-on collision with the abutment sidewall. Where only box type abutments are possible (i.e. with a return angle of > 20 degrees), protection must be provided against a head-on impact through the provision of a deflection wall. Reinforced soil abutments are acceptable provided that the superstructure is supported in a manner that is independent of the mechanically stabilised earth (MSE) wall and its retained backfill. However, MSE walls cannot be considered

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as contributing to the impact resistance unless the backfill is cement stabilised for a minimum width of 1.2m and for the full height of the wall. MSE walls may be designed and used as abutment wingwalls. Simply supported multi-span structures over railways must satisfy the following conditions: (i) bridge supports (piers including any infill walls and abutments) must be designed to resist railway impact loads in accordance with Code requirements; and following a detailed risk analysis carried out in accordance with AS/NZ 4360 and AS/NZ 3931, the risk acceptance criteria for the structure must be tolerable or negligible (as defined in Figure 3).
Acceptable Risk for Bridges over Railways
1.E-01

(ii)

Frequency of N or more fatalities per year (F)

1.E-02 INTOLERABLE

1.E-03

1.E-04 TOLERABLE IF ALARP

1.E-05

1.E-06

NEGLIGIBLE

1.E-07

1

10

100

1000

10000

ALARP - As Low As Reasonably Practical

Number of fatalities (N)

Figure 3: Risk Acceptance Criteria BDC 1 - 12 Pedestrian And Bicycle-Path Barriers Where a structure, such as a retaining wall, head wall or wingwall, presents a vertical or near vertical face 1.5 m or more in height and it would be likely that a person could gain access to the upper edge of the structure, a pedestrian restraint system such as a monowills 2-rail barrier shall be installed close to, or on top of the structure. A risk assessment shall be carried out for the protection screen requirements for objects falling or being thrown from bridges in accordance with Main Roads‟

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assessment procedure outlined in the report titled “Risk Management of Hazards on Pedestrian Overpasses”. Protection screens adjacent to traffic lanes, emergency breakdown lanes or parking lanes, shall have a minimum setback derived using Table 4.5 of Road and Traffic Engineering Branch‟s Document No. D06#26105, Assessment of Roadside Hazards. The values in the table can be extrapolated for lower speeds but not for a smaller vehicle or hazard height. BDC 1 - 14 Drainage The drainage system must be designed so that a minimal amount of water flows across Deck joints. All bridge drainage pipes whether external or internal must be of durable material, must be corrosion and fire resistant, and must be concealed from public view. Free draining scuppers through bridge Decks will not be allowed on new structures. All drainage structures must be vandal proof and accessible for cleaning, operational and maintenance purposes. BDC 1 - 16 Utilities (Services) Where possible, services must be concealed from public view within the bridge Superstructure, and adequate provision must be made for future inspection, maintenance and possible replacement. The Consultant must obtain the agreement of the relevant Authority or private owner in writing to the conditions contained in Appendix B of the Road and Traffic Engineering Branch‟s Document No. 67-08-108, Guide to the Relocation or Protection of Services. Spare ducts comprising two 100mm conduits must be provided on each side of the bridge terminating with capped ends beyond the deck and approach slab. BDC 2 - DESIGN LOADS BDC 2 - 5.3 Superimposed Dead Load Road bridge structures with an open graded asphalt wearing surface must be designed for a total asphalt thickness of 100mm. All other road bridges must be designed for asphalt surfacing 75mm thick. BDC 2 - 10.2 Collision Load From Road Traffic All Columns in the median and adjacent to shoulders must be designed to resist traffic impact forces, regardless of whether they are protected by safety barriers or not.

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BDC 2 - 14.3.2

Earthquake Forces - Bridge Classification

Earthquake effects shall be considered given the bridge classification Type XX. BDC 2 - 14.3.3 Acceleration Coefficient

The acceleration coefficient () must be multiplied by the probability factor kp = 1.8 to calculate ultimate limit state earthquake loads. The probability factor must not be applied to Table 14.3.1 of AS5100.2. BDC 2 - 21 Construction Forces And Effects For the design of precast concrete bridges and incrementally launched prestressed concrete bridges the following standards shall apply during the construction stage: Dead Load Launching Live Load As per Code 1kPa on all deck surface 5.0kN/m on steel nosing 70% of Code values 70% of Code values (with note added in the construction Specification that lifting and launching is not to be carried out during strong winds) -As specified by designer (shall be monitored and controlled during construction), but in no circumstances more than 25mm.

Differential Temperature Wind Load

Differential Settlement

BDC 3 - FOUNDATIONS AND SOIL - SUPPORTING STRUCTURES No modifications required. BDC 4 - BEARINGS AND DECK JOINTS BDC 4 - 5 Functions Of Bearings And Deck Joints The bridge deck slab shall be continuous between abutments, without deck joints. BDC 4 - 12.1 Elastomeric Bearings - General Where the use of elastomeric bearings is proposed bearings must be selected from Appendix A of the Code. BDC 4 - 12.6.7 Fixing of Bearings

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Bearings must be restrained in position by recessed pockets in concrete Substructures or by mechanical devices. BDC 4 – 17 Deck Joints

For small to medium movements prefabricated rubber extrusion type joints between heavy reinforcing angles shall be used. For larger movements, alternative types of joint, such as a multi-element joint shall be used. Bonded steel/rubber type joints shall not be used. Joints must not inhibit the proper placement of concrete. If finger plate expansion joints are used, then long term concrete shrinkage must be considered. Allowance must be made in the design to cater for simple and economical re-setting of the expansion gap during future maintenance work. The gap between finger plates must not present a hazard to cyclists. The modular expansion joint must not generate a significant increase in average noise levels. If a modular expansion joint is proposed on the bridge and the joint is located within a 2km radius from residential development, then the joint must be fitted with noise reduction system. Where the deck joint is attached by bolts cast into a concrete substrate, fully tensioned high tensile bolts must be used. Where the deck joint is attached by bars cast into concrete, flat bars must be used. BDC 4 - 17.5 Deck Joints - Drainage Deck joints must be designed to ensure the joint is watertight over the full width of the Deck. Prefabricated extrusion joints must be turned up directly behind the carriageway kerbs to maintain the same installation depth from the deck or superstructure surface and to contain runoff. Joints in shared path bridges or across raised parts of the deck or superstructure including paths, medians and parapets must be waterproofed using a recessed steel cover plate. Deck or superstructure crossfall must be designed to prevent water leakage or spillage from the deck or superstructure at the joints. BDC 5 - CONCRETE The following requirements are applicable to both superstructure and substructure design. BDC 5 - 2.8 Cracking Where bridge elements are fully restrained from expanding or contracting horizontally due to shrinkage or temperature, e.g. for concrete bridge girders where webs and flanges are not cast in a single pour, then minimum reinforcement requirements for horizontal reinforcement for crack control must be in accordance with clause BDC 5 – 11.6.2.

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BDC 5 - 4.3 Exposure Classification Protective surface coatings must not be taken into account in the assessment of the exposure classification. BDC 5 – 6.2.1 Strength and Ductility

Only normal (N) grade reinforcement will be permitted. BDC 6 - STEEL AND COMPOSITE CONSTRUCTION No modifications required. OTHER STRUCTURAL DESIGN REQUIREMENTS 1. Reinforced Soil Walls Reinforced soil walls must be designed in accordance with AS 4678, Earth Retaining Structures. Load bearing reinforced soil structures must comprise precast concrete facing panels. Polymeric material used as reinforcing strips for load bearing reinforced soil structures must satisfy the following conditions: (i) The reinforced soil wall system must be approved by Senior Engineer Structures; (ii) The reinforced soil wall system must be an approved RTA NSW system used only for the applications listed, refer RTA specification R57, Appendix R57/E available on-line at www.rta.nsw.gov.au/doingbusinesswithus/specifications; and (iii) There must be 150mm minimum clear cover from the front of the concrete panel to the geosynthetic reinforcement embedded in the panel. Where mechanically stabilised earth (MSE) panels are used for the bridge abutments or retaining walls, the superstructure must be independently supported on piles or columns founded below the reinforced soil block. Piles and columns must be fully fixed at the connection to the sillbeam, if used, and in all cases designed to carry full abutment bending and axial loads, with provision for up to 1.0m loss of MSE wall backfill under the top of the piles or columns for the full width of the superstructure. The MSE panels must extend to the underside of the superstructure with minimum clearance sufficient to enable the maintenance and replacement of the bearings. 2. Precast Prestressed Concrete Beams

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If precast prestressed concrete beams are used, no more than 50% of the prestressing strands must be debonded at any section, including beam ends, in order to prevent the development of intersecting horizontal cracks between the strands. Debonding of adjacent strands must not be permitted. 3. Median Columns All columns in the median and adjacent to shoulders must be designed to resist traffic impact forces, regardless of whether they are protected by safety barriers. 4. Access for Inspections and Maintenance Design shall consider discretely located access/steps to the substructure/underside of the bridge to assist in safe future inspection and maintenance by experienced personnel. 206.3.3 Preliminary Design Great importance is attached to carrying out adequate Preliminary Design to ensure that all alternatives are considered, constraints identified and the most appropriate design selected. The Consultant shall investigate a number of alternative proposals for the project. The proposals shall generally conform to the geometric and other constraints contained in this Brief, but shall not be restricted regarding construction materials and methods. Each proposal shall pay due attention to aesthetics and shall be suitably supported with general arrangement drawings, construction details and cost estimates. For aesthetic requirements reference can be made to RTA‟s Bridge Aesthetics Design Guidelines. Structures must be carefully designed and detailed to ensure long-term durability. As a minimum, durability standards and guidelines for the various materials and components used in all permanent structures must be in accordance with the Bridge Code. All construction and contraction joints and locations where precast elements abut or join must be waterproofed with a heavy duty sheet membrane. The membrane must run under and return up the back face of kerbs. The waterproofing must be in accordance with Main Roads‟ (TDP) Specification 875, Waterproof Membrane. The following design options shall also be investigated:
 

the requirement or otherwise for falsework support; a single span structure with solid abutments, or incorporation of pier design for high collision loads (e.g. bridge spans a railway which cannot be disrupted for long periods);

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

an incrementally launched structure (e.g. where structure spans a busy road, a river or railway);  availability of construction materials to suit program timeframes; and  delivery of materials to site. Selected surfaces of structures must be treated with non sacrificial anti-graffiti coating in accordance with Main Roads‟ (TDP) Specification 908, Anti-Graffiti. As a minimum, the extent of surfaces to be treated is all bridge abutments (full height), all bridge columns (full height), all parapets on abutments and approaches which are within 3.0m of finished ground level, all retaining walls (full height) except for faces abutting private property, all underpass walls and soffits, all noise walls and screen walls (full height) on both sides except for faces abutting private property, all concrete traffic barriers except surfaces on the superstructure visible in elevation view and any part of the superstructure which is within 3.0m of finished ground level. Consideration must be given to aesthetics when determining limits of coating. A Design Criteria Sheet shall be completed by the Consultant (refer Appendix 206.1) and included in all design reports. 206.3.4 Full Design Calculations Following completion of the Preliminary Design and agreement on the type of structure to be adopted, the Consultant shall carry out full design calculations for the structure in accordance with the requirements of this Brief. 206.3.5 Design Verification Prior to signing and submission of final drawings an independent check of all aspects of the structural design shall be carried out by a suitably qualified and experienced Engineer who was not involved in the design. The Principal may also arrange for a proof check of the design either by the Structures Engineering Branch or an independent authority appointed by the Principal. 206.3.6 Lighting Design The Consultant shall design lighting to the bridge carriageway and/or walkways in accordance with Main Roads' standards and utilising standard Main Roads' components. Refer to Section 205.9 Street Lighting. 206.3.7 Design Summary and Final Design Report At the completion of the design the Consultant shall carry out load rating of the bridge and also provide, as one of the Drawings for the bridge, a Design Summary Sheet, in accordance with Structures Engineering Branch Document No. 3912/02-2, Design of New Structures and Document No. 3912-02-4, Load Rating Existing Bridges.

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The Consultant shall also provide the information required for the Bridge Inventory database in accordance with Structures Engineering Branch Document No. 3912/02-15, Inventory and Construction Information. 206.3.8 Bridge Drawings All Bridge Design Drawings shall be produced to microfilm standards on A1 size sheets using Structures Engineering Branch‟s Standard Titleblocks. Drawings shall be produced in accordance with Structures Engineering Branch Document No. 3912/04, Drafting Information and Practices Manual. Drawings shall conform to the CAD standards, requirements and prototype details as detailed in Structures Engineering Branch Document No. 6706-02-2228, Guidelines on Presentation and Format of Drawings. The current edition of “Drafting Information and Practices Manual” will be made available to the Consultant as an uncontrolled copy upon request to the Principal‟s Representative. The “Guidelines on Presentation and Format of Drawings” is available on-line. To gain a familiarity with the standards and drawing requirements a Bridge “type example” hard copy set of Bridge drawings may be supplied upon request to the Principal‟s Representative or Drafting Principal‟s Representative (Bridges). The final Drawings for the Project shall be signed in the "Approved" box by a Director of the Principal's staff, a Partner or other senior member of the Consultant's staff to certify that the design and an independent design check have been carried out in accordance with this Brief. The final signed and dated copy of all documents plus hard and disk copy of all drawings associated with the Bridge works shall be delivered to the Structures Information and Standards Manager, 3rd Floor Main Roads Don Aitken Centre, for microfilming and long term storage. Disk copies shall be on 100% error free media to the completion requirements of Structures Engineering Branch Document No. 6706/02/2228, Guidelines on Presentation and Format of Drawings, and shall be compatible with the AutoCAD version currently in use by Structures Engineering Branch. Full size (A1) signed and dated hard copies of drawings shall be supplied to microfilm standards. The Consultant shall also supply an A2 reduced copy of the Tender documents prepared under Section 209.2. Phase 1 – Preliminary Design Where bridge designs are included in the commission, General Arrangement Drawings shall be prepared for all alternatives considered. Phase 2 – Detailed Design The drawings shall include the following:  Contract Cover sheet.  Index Sheet.  General Arrangement.

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           

Earthworks and Services (May be included in General Arrangement). Bore Information. Geometric Data. Reinforced Concrete drawings. Prestress Drawings. Bearing Data and Installation details. Beam Fabrication and Installation details. Traffic Barrier, Parapet Panel and Parapet railing details. Piling details. Expansion Joints and Approach Slabs details. Construction Sequence. Design Summary (For refurbishments - may be included in the General Arrangement).

<Example only - amend list as required> Phase 4 – Final Submission The principal of the company who is authorised to take responsibility for the technical content shall sign and date the drawings at this time. 206.3.9 Design of Temporary Works Where applicable, the design of temporary works shall be in accordance with AS 3610 - "Formwork for Concrete" and the Occupational Safety and Health Act, 1984 (WA). No temporary restriction to existing vertical clearances or temporary reduction in the load carrying capacity for heavy vehicle movements is permitted. 206.3.10 Structural Design Models Electronic copies of all structural design models used in the analysis shall be provided in accordance with Survey and Mapping Section‟s Guideline “Data Lodgement” Document No. 67-08-119. 206.3.11 Onsite Design Check

The Consultant shall peg the apron design levels of culverts and the abutment locations of new bridges for inspection by the Principal‟s Representative. 206.4 Retaining Walls

Retaining walls and other associated structures must be designed in accordance with the relevant sections and supplements of the Bridge Code, modified as described in Section 206.3.2. All retaining walls not covered by the Bridge Code as defined in AS 5100.1, Clause 1 must be designed in accordance with AS 4678 Earth Retaining Structures.

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The footings of any retaining wall located on a boundary must be located completely outside the abutting property. Such footings must be designed and located such that the face of the wall is as close as practicable and parallel to the boundary. Materials and appearance of retaining walls on private property boundaries must be approved by the property owner. 206.5 Sign Gantries and Cantilever Signs

All gantries and cantilever signs must be designed in accordance with the relevant sections and supplements of the Bridge Code, modified as described in Section 206.3.2. Support columns and support beams of gantries must be square or rectangular box sections. The surface finish colour must be 'Brunswick Green'.

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APPENDIX 206.1 – BRIDGE DESIGN CRITERIA
BRIDGE DESIGN CRITERIA BRIDGE NUMBER

CRITERIA SHEET NUMBER .......................................... DATE ............ /............/............ ROAD NAME .................................................................. RD CLASS.................................... REGION ................................................. PROJECT .................................................................................................................................................................................................... SPAN CONFIGURATION ....................................................................... ABUTMENT CHAINAGES/SLK ............................................... WIDTH BETWEEN KERBS ....................................... m FOOTPATH WIDTH .................................... m SKEW ................................ MINIMUM CLEARANCE REQUIREMENTS - VERTICAL ........................................................ HORIZONTAL ........................................ HYDRAULIC CRITERIA
BACKWATER FLOOD LEVELS (m) STAGE HEIGHT
NO SCOUR WITH SCOUR

VELOCITY (m/sec)

NATURAL MEAN IN MAIN CHANNEL

THROUGH BRIDGE OPENING
NO SCOUR WITH SCOUR

SERVICEABILITY SERVICEABILITY ULTIMATE AT OVERTOPPING ULTIMATE

SCOUR AT SERVICEABILITY L.S. DEPTH (m) R.L. (m)

CONSTRUCTION

AT PIERS

AT ABUTMENTS

LIMITED BY BEDROCK

SUBSTRUCTURE SOIL TYPE ....................................................................... TYPE OF FOUNDATION ................................................................................. ALLOWABLE BEARING PRESSURE (SPREAD FOOTINGS) AVERAGE ................................kPa PEAK ..................................... kPa DESIGN CRITERIA (PILES) .................................................. TYPE OF PIER ..................................................................................... PIER COLLISION LOADING ..................................................... SUPERSTRUCTURE TYPE OF STRUCTURE ....................................................................... MATERIALS AND CLASS .......................................................... DESIGN LOADS
TRAFFIC LOADING SUPERIMPOSED DEAD LDS DIFF. SETTLEMENT PIERS mm ABUTS mm EARTHQUAKE ZONE No.

(Design Code ..................................................... )
STD. HWY. LOADING No. OF STD DESIGN LANES H.L.P. SPECIAL VEHICLE OTHER

EXPOSURE CLASS

CONSTR. LOADING

MISCELLANEOUS TYPE OF HANDRAIL / TRAFFIC BARRIER ............................................................................................................................................... TYPE OF EXPANSION JOINTS .................................................................................................................................................................. TYPE OF BEARINGS .................................................................................................................................................................................. FUTURE WIDENING ................................................................................................................................................................................... SERVICES REQUIRED ON STRUCTURE (YES / NO) SERVICES REQUIRING RELOCATION (YES / NO) MEDIAN ON BRIDGE YES / NO
T‟PHONE T‟PHONE WATER WATER ELEC ELEC GAS GAS SEW‟S SEW‟S OTHER OTHER

LIGHTING ON BRIDGE YES / NO

DRAINAGE ON BRIDGE - SCUPPERS / PIPES / NONE

SPECIAL REQUIREMENTS ....................................................................................................................................................................... SUBMITTED BY ............................................................... DATE ............/............./..............
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APPROVED BY ............................................................................... DATE .........../............/...........

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GUIDANCE NOTES
DELETE GUIDANCE NOTES FROM FINAL DOCUMENT AFTER USING FOR REFERENCE

All edits to downloaded Briefs shall be tracked (most word processing software allows this to be done automatically). Deletions shall be struck through e.g. example. Insertions shall be in italics e.g. example. If all information relating to a clause is deleted then the clause number should be retained and the words "NOT USED" should be inserted. The proposed documents with tracked changes shall be submitted to Main Roads for review, prior to printing the final batch of documents. When this final printing is carried out, changes are saved and the tracked changes option is to be turned off. The Custodian of this section of the Brief is Mr Adam Lim (Structural Design & Standards Engineer) ph: 9323 4457. 1. Design Loads for the Movement of High Wide Loads

If structures are required to be designed to cater for the additional loads imposed due to the movement of High Wide Loads then the following paragraph should be added under the heading “BDC 2 – DESIGN LOADS” in Clause 206.3.2 Structural Design Standards. BDC 2 - 6 Road Traffic Additional design loads for the movement of High Wide Loads shall be in accordance with Road and Traffic Engineering Branch‟s „Guide to Design and Operation of High Wide Load Corridors‟ Document No. 05/9235. 2. Clause 206.3.5 Design Verification

If the optional Design Verification Clause 101.2.2.6 is included in the Brief then Clause 206.3.5 Design Verification needs to be amended accordingly.

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