CSTR: Part D12 Design – Proof Engineering
Edition: February 2011
PART D12
PROOF ENGINEERING
CONTENTS
1.
2.
3.
4.
5.
General
The Proof Engineer
Proof Engineering Certification
Proof Engineering
Hold Points
Appendix D012.1 Certificate of Compliance
1.
GENERAL
This Part specifies the requirements for Proof Engineering.
"Proof Engineering" means a special type of Design Verification that involves independent engineering
calculations to assure compliance with the requirements of the CSTR. It is performed on critical aspects of the
works, such as structural, hydraulic and geotechnical elements.
The Contractor must ensure that Proof Engineering is undertaken in accordance with the requirements of this Part.
The cost of engaging any external party to meet the requirements of this Part shall be borne by the Contractor.
2.
THE PROOF ENGINEER
The Proof Engineer(s):
3.
(a)
may / must not be part of the Designer’s or any independent verifier’s organisation;
(b)
must be completely free of any other commitment or obligation to any other party to this Contract and
any of their subcontractors or consultants;
(c)
must not have participated in the preparation of any part of the design of the Works in any manner
whatsoever;
(d)
must not be changed without the prior written approval of the Principal;
(e)
must act independently of the Principal, Contractor and any of their subcontractors or consultants;
(f)
must be a Chartered Professional Engineer with qualifications admitting to Corporate Membership of
the Institution of Engineers; and
(g)
must have extensive experience and skill that is relevant to the design being proof engineered.
PROOF ENGINEERING CERTIFICATION
Proof Engineering must be based on the Designer’s construction drawings and specifications and without reference
to the Designer’s computations or similar information. All advice and comment including calculations provided to
the Contractor by the Proof Engineer must be in writing.
The Proof Engineer must prepare a comprehensive written report of the assessment and a Proof Engineering
Certificates of Compliance, which must be forwarded to the Principal’s Authorised Person prior to finalisation of the
design. The Certificates of Compliance must be in accordance with the form included in Appendix D012.1. Where
this CSTR requires any Certificate of Compliance, the certificate must be unconditional and must not be qualified in
any way that could lessen the effect of the certificate.
Provision of the Certificates of Compliance shall constitute a HOLD POINT.
Evidence of the Proof Engineer’s detailed check and acceptance must be indicated on every drawing issued for
construction. Any amendment to the design after the issue of the Proof Engineering Certificate of Compliance must
be referred to the Proof Engineer for review and written confirmation that the Certificate remains valid.
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CSTR: Part D12 Design – Proof Engineering
The Contractor’s Quality Plan must include procedures for ensuring that the results of Proof Engineering are
reported in writing to the Contractor, who must advise the Designer and the Principal’s Authorised Person. Any
amendments agreed to by the Designer and the Proof Engineer must be incorporated into the final construction
drawings and specifications.
4.
PROOF ENGINEERING
Proof Engineering must be undertaken on the following:
4.1.
Structures and Major Temporary Works
For the purpose of this clause only:
“Major Temporary Works” means any temporary works which would have serious consequences (such
as a risk to the safety of any person, a delay to work on the critical path or a compromise to the quality of
the Works) in the event of the failure of the temporary works to perform as intended.
“Structures” includes bridgeworks, major service / drainage structures, overhead gantries, retaining walls
greater than 1.0 m high and non-standard traffic barriers.
Proof Engineering must:
(a)
include analysis of the Structures, Major Temporary Works, demolition (where applicable) and
construction methodology;
(b)
confirm that all relevant design actions and design assumptions are covered by the design and that these
actions and assumptions and the overall concept meet the requirements of the Principal’s Project
Requirements;
(c)
include a detailed check of individual structural elements and the structure as a whole, to ensure that
the strength, stability, serviceability and other Limit State requirements as defined in the Principal’s
Project Requirements are met;
(d)
include a check of the construction drawings and specifications to ensure the accuracy of:
i)
critical detailing and geometry;
ii) specifications for materials;
iii) proposed erection procedures;
iv) falsework, particularly regarding lateral stability; and
v) any temporary work or demolition work.
4.2.
Geotechnical Matters
Proof Engineering of geotechnical matters for both permanent works and temporary works must include a review of
all relevant Geotechnical Investigation Report(s) including the adopted Geotechnical Category in accordance with
AS 5100 "Bridge Design", the appropriate foundation investigation, the recommended design values, material
properties and possible failure mechanisms. It must be undertaken for the design of foundations, soil structures and
excavations (including settlement calculations).
4.3.
Hydrologic and Hydraulic Matters
Proof Engineering of the hydrologic and hydraulic aspects of design must include a review of the major design
parameters including design flood discharges and levels, stream velocities and afflux as well as evaluation of
potential for and protection against scour and bank erosion. It must be undertaken for the design of drainage works
and sedimentation basins.
4.4.
Pavements
Proof Engineering of pavements must:
(a)
Assess the design methodology and assumptions for each pavement and establish their suitability,
including:
i)
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determination of asphalt moduli and fatigue constants;
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CSTR: Part D12 Design – Proof Engineering
Edition: February 2011
ii) discussion of any geotechnical issues which may affect pavement performance; and
iii) details of any special construction techniques or processes;
(b)
Determine the Whole of Life cost using normally accepted maintenance regimes and considering the
unique location. The assumed maintenance strategy and any risks considered must be documented; and
(c)
Provide calculations, including the CIRCLY outputs (CLO file).
4.5.
Railways
Proof Engineering of Railways must:
(a)
confirm that all relevant design actions and design assumptions are covered by the design and that these
actions and assumptions and the overall concept meet the requirements of the Principal’s Project
Requirements;
(b)
include a detailed check of individual railway elements to ensure that the strength, stability,
serviceability and other requirements as defined in the Principal’s Project requirements are met,
including:
i)
formation (including any special construction techniques or processes);
ii) track;
iii) signals; and
iv) overhead and power infrastructure / operating systems;
(c)
include a check of construction drawings and specifications to ensure the accuracy of:
i)
critical detailing and geometry;
ii) specifications for materials; and
iii) proposed erection procedures.
5.
HOLD POINTS
The following is a summary of Hold Points referenced in this Part:
CLAUSE
REF.
3
HOLD POINT
Provision of Certificate of Compliance
RESPONSE
TIME
10 Working Days
____________
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CSTR: Part D12 Design – Proof Engineering
Edition: February 2011
APPENDIX D012.1
CERTIFICATE OF COMPLIANCE
Form of Certificate to be used by the Proof Engineer
CONTRACT…………………………………………………………………..
CONTRACTOR…………………………………………………………………..
An independent Proof Engineering review has been undertaken in relation to the design represented by the Drawings
and Specifications listed in the attached schedule. In undertaking this review I certify that:
STRUCTURAL
(a)
All relevant design actions and design assumptions are covered by the design and that these actions and
assumptions and the overall concept meet the requirements of the Principal’s Project Requirements.
(b)
A detailed check of individual structural elements and the structure as a whole has been carried out, and
the strength, stability, serviceability and other Limit State requirements as defined in the Principal’s
Project Requirements are met.
(c)
Construction drawings and specifications have been checked and accurately describe:

the accuracy of critical detailing and geometry;

the adequacy of specifications for materials;

the adequacy of proposed erection procedures; and

the adequacy of temporary work.
GEOTECHNICAL
Proof Engineering of geotechnical matters for both permanent works and temporary works has included a
review of the Foundation Investigation Report including the adopted Geotechnical Category in accordance
with the AS 5100 "Bridge Design", the appropriate foundation investigation, the recommended design
values, material properties and possible failure mechanisms.
HYDRAULIC
Proof Engineering of the hydraulic/hydrologic aspects of design has included a review of the major design
parameters including design flood discharges and levels, stream velocities and afflux as well as evaluation
of potential for and protection against scour and bank erosion.
PAVEMENTS
RAILWAYS
Signed: .......................................................................................................................................................
Name: .......................................................................................................................................................
Proof Engineer
Date:
.......................................................................................................................................................
____________
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