National Roads Authority
Design Manual for Roads and Bridges
Addendum
Volume 2 Section 2
Part 6 BD 12/95
NRA ADDENDUM TO
BD 12/95
DESIGN OF
CORRUGATED STEEL BURIED STRUCTURES
WITH SPANS NOT EXCEEDING 8m
(INCLUDING CIRCULAR ARCHES)
Standard BD 12/95 - Design of Corrugated Steel Buried Structures with Spans not Exceeding 8m (Including
Circular Arches) - is applicable in Ireland with the following amendments:
GENERAL
1.
This 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.
2.
At several locations:
For:
“Overseeing Organisation”
Read: “National Roads Authority”;
“Departmental Type Approval Certificate” or
“Highways Agency Type Approval Certificate” or
“Highways Agency of the Department of Transport Type Approval Certificate”
Read: “Type Approval Certificate”;
For:
For:
“Specification for Highway Works (MCHW 1)” or “MCHW 1”
Read: “NRA Specification for Road Works”;
For:
“British Board of Agrément” or “BBA”
Read: “Irish Board of Agrément”;
For:
“BD 24 (DMRB 1.3.1)”
Read: “NRA BD 24 (NRA DMRB 1.3.1)”;
For:
“Outline Approval in Principle”
Read: “outline Preliminary Approval”;
For:
“BS EN ISO 9002”
Read: “IS EN ISO 9002”.
December 2000
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National Roads Authority
Design Manual for Roads and Bridges
Addendum
Volume 2 Section 2
Part 6 BD 12/95
SPECIFIC
1.
Page 1/2, Paragraph 1.4:
Delete Paragraph 1.4 and replace with:
“1.4
Corrugated steel buried structures are
proprietary manufactured structures.
The
design procedures shall comply with the
requirements of NRA BD 2 (NRA DMRB 1.1).
The design organisation shall give due
consideration to the appropriate contractual
procedures for the adoption of proprietary
manufactured structures.”
2.
Page 1/2, Paragraph 1.5, line 4:
For:
“require a Departmental Type Approval Certificate (MCHW1 Clause 104.9).”
Read: “require approval from the National Roads Authority. A Type Approval Certificate from the
UK Highway Agency or equivalent national organisation will normally be sufficient.”
3.
Page 1/3, Paragraph 1.6, line 3:
For:
“a Type Approval Certificate from the Highways Agency.”
Read: “approval from the National Roads Authority.”
4.
Page 1/3, Paragraph 1.10:
Delete Paragraph 1.10 and replace with:
“1.10 This 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.
Page 3/1, Paragraph 3.3, line 6:
For:
“Trunk Roads”
Read: “National Roads”.
6.
Page 8/1, Paragraph 8.2, line 1 :
Delete first sentence “All surfaces … Table 1.”
and replace with:
“8.2 All surfaces shall be protected by a hot-dip
galvanised coating to IS EN ISO 1461 with a
minimum average thickness in accordance with
IS EN ISO 1461 (1999) Tables 2 and 3.”
7.
Page 8/2, Paragraph 8.11.1, line 5:
Delete: “using the criteria in Table 8”.
December 2000
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National Roads Authority
Design Manual for Roads and Bridges
Addendum
Volume 2 Section 2
Part 6 BD 12/95
8.
Page 8/2, Paragraph 8.11.3:
Delete Paragraph 8.11.3 and replace with:
“8.11.3
The harshness of the atmospheric
environment shall be determined by the Design
Organisation. The corrosivity (acid deposition)
value shall be classified as „non-aggressive‟,
„aggressive‟ or „very aggressive' as appropriate.
Both the general location and any significant
environmental factors in the area shall be taken
into account. Thus, for example, pollution from
a nearby industrial plant may override the
general classification.
Where necessary,
specialist advice should be sought.”
9.
Page 8/6, Table 8:
Delete Table 8.
10.
Page 11/1, Paragraph 11.1, line 2:
Delete: “as defined in SD4 (MCHW 0.2.4)”.
11.
Page 11/1, Paragraph 11.3, line 6:
For:
“Departmental Design Standards”
Read: “Standards”.
12.
Page 16/1, Paragraph 16.1:
Delete Paragraph 16.1 and replace with:
“16.1 The design organisation shall give due
consideration to the appropriate procedures for
specifying a proprietary manufactured structure.
The particular requirements for corrugated steel
buried structures are described here.”
13.
Page 16/1, Paragraph 16.2, line 2:
For:
“an Outline Approval in Principle”
Read: “an Application for Preliminary Approval”.
14.
Page 16/1, Paragraph 16.3, line 3:
For:
“AIP form”
Read: “Application for Preliminary Approval form (STA-2)”.
15.
Page 16/2, Paragraph 16.5:
Delete Paragraph 16.5 and replace with:
“16.5 The further stages in the post award
contract procedures shall be as given in NRA
BD 2 (NRA DMRB 1.1).”
16.
Page 17/1, Reference 17.1, line 3:
For:
“BD2:
Part 1 - Technical Approval of Highway Structures (DMRB 1.1)”
Read: “NRA BD2:
Technical Approval of Structures on Motorways and other National Roads
(NRA DMRB 1.1).”
December 2000
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National Roads Authority
Design Manual for Roads and Bridges
Addendum
Volume 2 Section 2
Part 6 BD 12/95
17.
Page 17/1, Reference 17.1, line 5:
For:
“BD 24: Design of Concrete Bridges: Use of BS 5400: Part 4 (DMRB 1.3.1).”
Read: “NRA BD 24: Design of Concrete Road Bridges and Structures: Use of BS 5400: Part 4:
1990 (NRA DMRB 1.3.1).”
18.
Page 17/1, Reference 17.2:
Delete Reference 17.2 and replace with:
“17.2 Specification
Highways Agency, Manual of Contract Documents for Highway Works: Volume 0: SA1 Lists
of Approved/Registered Products (MCHW 0.3.1).
NRA, Manual of Contract Documents for Road Works: Volume 1, Specification for Road
Works.”
19.
Page 17/1, Reference 17.3, line 2:
For:
“BS 729: 1971 (1986) - Specification for hot dip galvanised coatings on iron and steel
articles.”
Read: “IS EN ISO 1461: 1999 - Hot dip galvanised coatings on fabricated iron and steel articles Specifications and test methods.”
20.
Page 17/1, Reference 17.3, line 13:
For:
“BS 5930: 1981 – Code of Practice for Site Investigations”
Read: “BS 5930: 1999 – Code of Practice for Site Investigations.”
21.
Page 18/1, Chapter 18:
Delete text and replace with:
“18.1 All technical enquiries or comments on this Standard should be sent in writing to:
Head of Project Management and Engineering
National Roads Authority
St Martin‟s House
Waterloo Road
Dublin 4”.
22.
Page A/1, Paragraphs A.2 to A.5.5, at several locations:
For:
“Bridges Engineering Division, The Highways Agency” or “the Highways Agency” or
“Bridges Engineering Division” or “BE Division”
Read: “the National Roads Authority”.
23.
Page A/2, final paragraph, line 4:
For:
“Highways Agency”
Read: “UK Highways Agency”.
24.
Pages B/1 and B/2, Paragraphs B.1 to B.6, at several locations:
For:
“the Highways Agency of the Department of Transport” or “the Department”
Read: “the National Roads Authority”.
December 2000
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National Roads Authority
Design Manual for Roads and Bridges
Addendum
25.
Volume 2 Section 2
Part 6 BD 12/95
Page B/1, Paragraph B.1, line 9 & Paragraph B.3.1, line 2 and
Page B/2, Paragraph B.5, line 5:
For:
“NAMAS” or “National Measurement and Accreditation Services, NAMAS”
Read: “Irish Laboratory Accreditation Board”.
…………………………………………
E O‟CONNOR
Head of Project Management and
Engineering
December 2000
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National Roads Authority
Design Manual for Roads and Bridges
Addendum
December 2000
Volume 2 Section 2
Part 6 BD 12/95
6
Design of Corrugated Steel
Buried Structures With Spans
Not Exceeding 8 m
(Including Circular Arches)