General: BD 37/01 Loads For Highway Bridges (And Corrections)
General: BD 37/01 Loads For Highway Bridges (And Corrections)
General: BD 37/01 Loads For Highway Bridges (And Corrections)
NRA ADDENDUM TO
BD 37/01
This Addendum supersedes the NRA Addendum dated October 2001 to Standard BD 37/01. The revisions
have arisen due to the publication of Corrections to BD 37/01 in February and May 2002.
Standard BD 37/01 – Loads for Highway Bridges [and Corrections dated February and May 2002] – is
applicable in Ireland with the following amendments:
GENERAL
1. Standard BD 37/01 is to be used for the design of road bridges only. For the design of railway
bridges, design organisations shall consult the relevant railway authority for the loading requirements to be
used.
2. Where the Standard is applied for the design of structural components which are procured through a
contract incorporating the NRA Specification for Road Works, products conforming to equivalent standards
and specifications of other member states of the European Union will be acceptable in accordance with the
terms of Clauses 104 and 105 of that Specification. Any contract for the procurement of structural
components which does not include these Clauses must contain a suitable clause of mutual recognition
having the same effect, regarding which advice should be sought.
3. The Standard provides specification requirements for use in public purchasing contracts. It does not
lay down legislation requirements for products and materials used in road construction in Ireland.
4. The Standard should be used forthwith for all schemes for the construction and/or improvement of
national roads. The Standard should be applied to the design of schemes already being prepared unless, in
the opinion of the National Roads Authority, application would result in significant additional expense or
delay progress. In such cases, Design Organisations should confirm the application of this Standard to
particular schemes with the National Roads Authority.
5. At several locations:
For: “highway”
Read: “road”;
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National Roads Authority Volume 1 Section 3
Design Manual for Roads and Bridges Part 14 BD 37/01
Addendum
SPECIFIC
1. BD 37/01
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National Roads Authority Volume 1 Section 3
Design Manual for Roads and Bridges Part 14 BD 37/01
Addendum
“6.1 All technical enquiries or comments on this Standard should be sent in writing to:
2. Appendix A
“In the case of railways, the loading requirements shall be agreed with the relevant railway authority.”
“In Ireland, values of Vb shall be increased by 2m/s above the values obtained from Figure 2.”
“For design rules for the aerodynamic effects on bridges see BD 49 (DMRB 1.3.3). For the Vibration
Serviceability Requirements for Foot and Cycle Track Bridges, see Appendix B.”
“Rules for the design of road parapets in Ireland, including requirements for high level of containment
parapets, are set out in BD 52 (DMRB 2.3.3).”
“** For vehicle collision loads, see BD 60 (DMRB 1.3.5). Clause 6.8 shall only be used for loads
on foot/cycle track bridge ramps and stairs which are structurally independent of the main
road-spanning structure and for loads on foot/cycle bridge supports with a carriageway
clearance equal to or greater than 4.5m. For all other bridges, vehicle collision loads shall be
calculated in accordance with BD 60 (DMRB 1.3.5).”
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National Roads Authority Volume 1 Section 3
Design Manual for Roads and Bridges Part 14 BD 37/01
Addendum
“*** Criteria for the provision of safety fences in Ireland are set out in NRA TD 19 (NRA DMRB
2.2.8A).”
“** For vehicle collision loads on foot/cycle track bridges, see BD 60 (DMRB 1.3.5). Clause 7.2
shall only be used for vehicle collision loads on foot/cycle track bridge ramps and stairs which
are structurally independent of the main road-spanning structure and for loads on foot/cycle
track bridge supports with a carriageway clearance equal to or greater than 4.5m. For all other
foot/cycle track bridges, vehicle collision loads shall be calculated in accordance with BD 60
(DMRB 1.3.5).”
“* Rules for the design of pedestrian parapets in Ireland are set out in BD 52 (DMRB 2.3.3).”
3. References
BD 60: Design of Highway Bridges for Vehicle Collision Loads (DMRB 1.3.5).
…………………………………………
E O’CONNOR
Head of Project Management and
Engineering
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