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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 />

1220 Extracts from BS 5950: Part 1<br />

Extracts from BS 5950: Part 1: 2000<br />

Acknowledgement<br />

Extracts from BS 5950 Part 1: 2000 reproduced with the permission of BSI under<br />

licence number 2002SK/0070. British Standards can be obtained from BSI Customer<br />

Services, 389 Chiswick High Road, London W4 4AL, United Kingdom.<br />

(Tel + 44 (0) 20 8996 9001).<br />

BS 5950: Part 1: 2000: Section two<br />

Table 8. Suggested limits for calculated deflections<br />

(a) Vertical deflection of beams due to imposed load<br />

Cantilevers Length/180<br />

Beams carrying plaster or other brittle finish Span/360<br />

Other beams (except purlins and sheeting rails) Span/200<br />

Purlins and sheeting rails See clause 4.12.2<br />

(b) Horizontal deflection of columns due to imposed load and wind load<br />

Tops of columns in single-storey buildings, except portal frames Height/300<br />

Columns in portal frame buildings, not supporting crane runways To suit cladding<br />

Columns supporting crane runways To suit crane runway<br />

In each storey of a building with more than one storey Height of that storey/300<br />

(c) Crane girders<br />

Vertical deflection due to static vertical wheel loads from overhead<br />

travelling cranes Span/600<br />

Horizontal deflection (calculated on the top flange properties alone)<br />

due to horizontal crane loads Span/500

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