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CSA G40.20-04/G40.21-04 Document Information:
Title
General requirements for rolled or welded structural quality steel/ Structural quality steel
Canadian Standards Association
Publication Date:
Feb 1, 2004
Scope:
This is the sixth edition of CSA G40.20/G40.21, General requirements
for rolled or welded
structural quality steel/Structural quality steel. It supersedes
previous editions published in
1998, 1992, 1987, 1981, and 1978.
This edition comprises amendments published in General Instruction No.
2 to the previous edition,
corrections of errata, and new amendments approved by the Technical
Committee on Structural Steel.
These include
(a) a change in the location of tensile test samples from the web to
the flange on W, HP, S, and M
shapes;
(b) the adoption of CAN/CSA-G40.23 for assessment of the surface
quality of plate;
(c) the acceptance under G40.20/G40.21 of products manufactured in
conformance with ASTM A 992/A
992M, Structural Steel Shapes;
(d) the addition of requirements for cold-formed Z sections;
(e) revisions to the permissible variations in the dimensions of
cold-formed channels; and
(f) the addition of Table 11, which provides the dimensions and mass
(weight) of commonly available
structural shapes and hollow structural sections, replacing and
updating information in
CAN/CSA-G312.3-M, Metric Dimensions for Structural Steel Shapes and
Hollow Structural Sections
(withdrawn in 2001).
These Standards are written in SI (metric) units, with yard/pound
units included in parentheses.
The SI units are in conformance with CSA Z234.1, Metric Practice
Guide.
While the technical requirements of the metric and yard/pound versions
are virtually the same, some
differences do occur. Either the SI or the yard/pound units must be
used, and any attempt to
intermingle the two systems of units on any specific purchase of
material may result in
nonconformance with the Standards.
These Standards have been harmonized to the maximum possible extent
with equivalent ASTM Standards
A 6/A 6M and A 568/A 568M.
These Standards were prepared by the Technical Committee on Structural
Steel, under the
jurisdiction of the Strategic Steering Committee on Welding and
Structural Metals, and have been
formally approved by the Technical Committee.
February 2004
Notes:
(1) Use of the singular does not exclude the plural (and vice versa)
when the sense allows.
(2) Although the intended primary application of this Standard is
stated in its Scope, it is
important to note that it remains the responsibility of the users of
the Standard to judge its
suitability for their particular purpose.
(3) This publication was developed by consensus, which is defined by
CSA Policy governing
standardization - Code of good practice for standardization as
"substantial agreement. Consensus
implies much more than a simple majority, but not necessarily
unanimity". It is consistent with
this definition that a member may be included in the Technical
Committee list and yet not be in
full agreement with all clauses of this publication.
(4) CSA Standards are subject to periodic review, and suggestions for
their improvement will be
referred to the appropriate committee.
(5) All enquiries regarding this Standard, including requests for
interpretation, should be
addressed to Canadian Standards Association, 5060 Spectrum Way, Suite
100, Mississauga, Ontario,
Canada L4W 5N6.
Requests for interpretation should
(a) define the problem, making reference to the specific clause, and,
where appropriate, include an
illustrative sketch;
(b) provide an explanation of circumstances surrounding the actual
field condition; and
(c) be phrased where possible to permit a specific "yes" or "no"
answer.
Committee interpretations are processed in accordance with the CSA
Directives and guidelines
governing standardization and are published in CSA's periodical Info
Update, which is available on
the CSA Web site at www.csa.ca.
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