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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 />

TRAPEZOIDAL DECK<br />

Construction<br />

Composite<br />

Beams<br />

COMPOSITE BEAMS - UNFILLED VOIDS<br />

Fire Protection<br />

Fire Resistance (minutes)<br />

On Beam Up to 60 90 Over 90<br />

BOARD No Increase Increase thickness* Fill voids<br />

or SPRAY in thickness* by 10%<br />

(or use thickness*<br />

appropriate to beam<br />

Hp/A + 15%<br />

whichever is less)<br />

INTUMESCENT Increase thickness* Increase thickness* Fill voids<br />

by 20% by 30%<br />

(or use thickness* (or use thickness*<br />

appropriate to appropriate to<br />

beam Hp/A + 30% beam Hp/A + 50%<br />

whichever is less) whichever is less)<br />

Non-<br />

Composite All types Fill voids<br />

Beams<br />

DOVETAIL DECK<br />

_____\__7 _______<br />

Fire Protection<br />

Construction Fire Resistance (minutes)<br />

On Beam<br />

Composite or<br />

Non-composite All Types<br />

Beams<br />

Voids may be left unfilled for all fire<br />

resistance periods.<br />

Fire resistance 1293<br />

Thickness is the board, spray or intumescent thickness given for 30, 60 or 90 minutes rating in<br />

Fire Protection for Structural <strong>Steel</strong> in Buildings" published by ASFP (01252 336318) and<br />

The <strong>Steel</strong> Construction Institute (01344 23345)

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