Edition: Jul 2015
CSTR: Part D35 Design - Structural
PART D35
DESIGN - STRUCTURAL
CONTENTS
1.
2.
3.
4.
5.
6.
7.
1.
General
Design Requirements for Bridges
Interpretation of the Bridge Design Standard
Materials and Durability
Design Requirements for Noise Barriers
Inspection and Maintenance Procedures
Records
GENERAL
This Part specifies the requirements for the design of the following structures:
(a)
bridges and associated structures which support loading from road traffic, light railways, heavy
railways, pedestrians and / or bicycles;
(b)
reinforced soil structures;
(c)
underpasses (traffic and pedestrian);
(d)
culverts with a clear span greater than or equal to 1.5 m;
(e)
major drainage structures and structures for Utility Services;
(f)
retaining walls and associated structures;
(g)
noise barriers; and
(h)
non-standard sign support structures, such as cantilever signs and gantries.
This part does not cover the design of building structures and tunnels.
Where more than one Designer prepares the design, the Contractor must ensure that there is consistency in design
assumptions, design methodology, design modelling and details.
Unless specified otherwise, all design and / or documentation must comply with the requirements of this Part and:
(a)
DPTI Design Standard: “Reinforced Soil Structures” for reinforced soil structures;
(b)
DPTI Design Standard: “Retaining Walls” for retaining walls; and
(c)
DPTI Design Standard: “Structural” for all other structures.
DPTI Design Standards are available http://www.dpti.sa.gov.au/standards/major_structures_documents.
2.
2.1.
DESIGN REQUIREMENTS FOR BRIDGES
General
In addition to the requirements specified in Clause 4 of the DPTI Structural Design Standards, the structure design
must comply with the requirements in this clause.
2.2.
Fire Rating
The structure must be designed for a fire rating, in accordance with AS3600, of [Insert project specific, default
2hours].
2.3.
Earthquake Design Provision
The bridge classification is Type II in accordance with 5100.2 and AS 1170.4,
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2.4.
CSTR: Part D35 Design - Structural
Anti Graffiti Coating
Insert Details
2.5.
Cathodic Protection
The bridge must incorporate provisions for the future installation of cathodic protection
2.6.
Substructures
Pile caps must be designed so the top of the pile cap is below ground level or the underside out of sight at low water
level.
2.7.
Aesthetic Requirements
The aesthetics of structures must be in accordance with the requirements included in Part D037 Design –
Landscape and Urban Design.
2.8.
Requirements for Future Expansion of the Works
Insert details for any future widening etc.
Example wording for extension of reinforced soil structure:
The design of the reinforced Soil Structure must allow for both initial and future configurations. The walls may be
extended in height (ie. wingwalls extended to form widened bridge abutments along future road duplications) at the
following locations:
[Insert locations here]
At these locations, the soil reinforcement and facing panels constructed under this Contract must be designed to
support the extended wall and any additional surcharge without modification (except for removal of non-standard
capping panels). For walls that are to be extended laterally, the extension must be able to be constructed without
disturbing reinforcing straps that are to remain in place and without compromising the integrity of the temporarily
excavated reinforced earth block due to scour or soil instability.
3.
INTERPRETATION OF THE BRIDGE DESIGN STANDARD
The design must be undertaken using the clarifications and interpretations of AS 5100 Bridge Design contained
within this Clause.
AS 5100 must be read to incorporate the corrections listed in Appendix 1: “AS 5100 – Corrections”. The Design
Report must include details of any additional interpretations or clarifications proposed.
Clause
AS 5100.1 – 6.2
"Design Life"
Requirement
ELEMENT
(Years)
Other urban design elements
DESIGN LIFE
50
Insert any other requirements here
AS 5100.1 – 9.2
"Railway Bridges"
Insert details if relevant
AS 5100.1 – 9.4
"Road Bridge
Carriageway Widths"
Insert Details if relevant
AS 5100.1 – 9.7
“Vertical Clearance
over Roadways"
Insert details if relevant
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CSTR: Part D35 Design - Structural
Clause
Requirement
AS 5100.1 – 9.11
"Pedestrian Bridges"
Insert details if relevant
AS 5100.1 – 10
"Road Traffic
Barriers"
Insert details if relevant
AS 5100.2 – 6.3
"Heavy Load
Platform"
Insert details if relevant
AS 5100.2 – 8
"Railway Traffic"
Insert details if relevant
AS 5100.2 – 11.2.2
"Traffic Barrier
Design Loads"
Insert details if relevant
AS 5100.1 – 12.3
“Protection screens
for objects falling or
being thrown from
bridges.”
Specify if protection screens are required – otherwise the defaults in Clause 9 of the
Design Standard will apply.
4.
MATERIALS AND DURABILITY
4.1
Steelwork
Selection of the system must be based on table 6.3 of AS 2312 for the appropriate corrosivity category ……
Insert coating system details here eg:
The coating system used must be selected from the following system designations, as detailed in Table 6.3 of the
2004 amendment to AS/NZS 2312:
4.2
(a)
EHB6 (Primer must be PRN C01a, C01b or C01c).
(b)
PSL1 (System must include an additional intermediate coat of PRN C13 epoxy MIO to 125µm).
(c)
PUR5 (Primer must be PRN C01a, C01b or C01c).
(d)
Where a decorative or aesthetic finish is desired, only systems PSL1 and PUR5 may be used.
Durability Plan
A Durability Plan is/ is not required
Submission of the Durability Plan shall constitute a HOLD POINT.
5.
DESIGN REQUIREMENTS FOR NOISE BARRIERS
Insert any specific requirements for noise barriers here.
6.
INSPECTION AND MAINTENANCE PROCEDURES
The Contractor must prepare and submit Inspection and Maintenance Procedures which describe all inspection and
maintenance necessary to ensure that the performance, functionality and durability of the structure does not
deteriorate.
As a minimum, the procedures must include in detail:
(a) A copy of the Durability Plan (where a Durability Plan is specified in this Contract);
(b) details of the frequency and extent of inspection required;
(c) details of the frequency and extent of monitoring required;
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CSTR: Part D35 Design - Structural
(d) intervention levels at which rectification work or replacement is required;
(e) intervention methods; and design limitations/considerations;
(f) details of how to safely access locations for regular maintenance, inspections or replacing of elements;
(g) method of replacement of specific elements;
(h) contact details of suppliers of replacement elements and spares;
(i) warranties on proprietary products;
(j) any manuals and drawings available from the manufacturer of all externally supplied components used in
the works, including mechanical and electrical elements; and
(k) a historical record of construction issues and their resolutions.
7.
RECORDS
The Contractor must provide the records specified in the DPTI Design Standard(s) to the Principal available at:
http://www.dpti.sa.gov.au/standards
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