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Steel Designers Manual - TheBestFriend.org

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This material is copyright - all rights reserved. Reproduced under licence from The <strong>Steel</strong> Construction Institute on 12/2/2007<br />

To buy a hardcopy version of this document call 01344 872775 or go to http://shop.steelbiz.<strong>org</strong>/<br />

<strong>Steel</strong> <strong>Designers</strong>' <strong>Manual</strong> - 6th Edition (2003)<br />

Table 31.4 (Extract from National Structural <strong>Steel</strong>work Specification 4th edn.)<br />

SECTION 7<br />

WORKMANSHIP - ACCURACY OF FABRICATION<br />

7.1 PERMITTED DEVIATIONS<br />

Permitted deviations in cross section, length, straightness, flatness, cutting, holing and<br />

position of fittings shall be as specified in 7.2 to 7.5 below.<br />

7.2 PERMITTED DEVIATIONS IN ROLLED COMPONENTS AFTER<br />

FABRICATION<br />

(Including Structural Hollow Sections)<br />

©BCSA<br />

7.2.1 Cross Section after Fabrication In accordance with the<br />

appropriate tolerances standard<br />

given in Table 2.1<br />

(Section 2)<br />

7.2.2 Squareness of Ends Not I<br />

Prepared for Bearing D A = D/300<br />

See also 4.3.3 (i)<br />

7.2.3 Squareness of Ends Prepared<br />

for Bearing<br />

A<br />

A<br />

Plan or Elevation of End<br />

AD/l000<br />

Prepare ends with respect to the 900 - - D.<br />

longitudinal axis of the member.<br />

See also 4.3.3 (ii) and (iii).<br />

Plan or Elevation<br />

7.2.4 Straightness on Both Axes<br />

Erection tolerances 931<br />

L<br />

A= L/l000 or 3mm<br />

whichever is the greater

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