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BRICK TECHNICAL BULLETIN<br />
FIRE RESISTANCE<br />
BTB 13<br />
Concrete masonry in the form of <strong>Edenhall</strong> brick is a non combustible construction material possessing excellent fire resisting properties.<br />
The resistance to fire within a structure utilising concrete masonry products is a function of:<br />
1. The thickness of the units involved<br />
2. The function of the wall, ie. whether or not it is load-bearing<br />
3. Wall construction, ie. whether it is single leaf or cavity construction<br />
4. The applied wall finish, whether plastered or otherwise<br />
5. Finally, the type of aggregate used to produce the masonry units<br />
<strong>Edenhall</strong>’s products are all produced from Class 1 aggregates, are classed as non-combustible with a zero spread of flame, and are<br />
further classed as Category A1 in accordance with BS 13501-1.<br />
The following tables indicate the nominal fire resistance periods for <strong>Edenhall</strong>’s various types of masonry, ie. common and facing bricks.<br />
They are based on Table 14 of BS 5628: Part 3.<br />
Wall Thickness<br />
made from Brick<br />
Fire Resistance in Hours<br />
No Finish<br />
VG Finish<br />
Wall Thickness<br />
made from Brick<br />
Fire Resistance in Hours<br />
No Finish<br />
VG Finish<br />
1. Load Bearing Single Leaf Wall<br />
100mm 2 3<br />
140mm 4 6<br />
215mm 6 6<br />
2. Non Load Bearing Single Leaf Wall<br />
100mm 2 3<br />
140mm 3 6<br />
215mm 6 6<br />
3. Load Bearing Cavity Wall<br />
100mm 6 -<br />
140mm 6 -<br />
215mm 6 -<br />
4. Non Load Bearing Cavity Wall<br />
100mm 6 -<br />
140mm 6 -<br />
215mm 6 -<br />
Notes:<br />
• <strong>Edenhall</strong> bricks are produced in a minimum thickness of 100mm.<br />
• Finishes should be not less than 13mm plaster on each face of a single leaf wall and the exposed faces of a cavity wall.<br />
VG is Vermiculite: gypsum plaster.<br />
• The thicknesses quoted are in millimetres and represent the work size of the unit or, where applicable for solid walls, the<br />
sum of the work sizes for two units including the joint between them.<br />
Head Office: PD <strong>Edenhall</strong> Ltd, Danygraig Road, Risca, Newport, NP11 6DP Tel: 01633 612671 Fax: 01633 601280 edenhall.co.uk<br />
The information and guidance contained in our <strong>Technical</strong> Bulletins, <strong>Technical</strong> Data Sheets and <strong>Technical</strong> Manual are regularly reviewed as part of <strong>Edenhall</strong>’s continuous development and<br />
improvement programme. Updates and amendments can be made without notice and the Company cannot accept liability for any errors or omissions. The content of this document<br />
and the referenced data sheets and bulletins, including tables, diagrams and images, are subject to copyright.
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