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Brick shelf angles
- To: seaint(--nospam--at)seaint.org
- Subject: Brick shelf angles
- From: Kevin Below <kevinbelow(--nospam--at)videotron.ca>
- Date: Tue, 16 Nov 2004 20:29:25 -0500
What is the maximum
vertical spacing for brick veneer shelf angles ? The Canadian masonry code
S304.1-94, Clause 16.9.4 for empirical design of brick veneers states 11 metres
to the first shelf, then a maximum spacing of 3.6 metres.
I would like to be
able to use 2 story spacing above the 11 m if possible for a concrete-frame
building, total of 5 stories of brick facing. That would translate to a
single shelf angle ( at level 4) instead of 2 (at levels 4 and 5). And
with the price of shelf angles - apparently 225 $ a metre, about 75 $ a foot,
(does that sound right ? I am still not convinced, but that's what the
construction manager says), it's worth doing the research.
Since the code
requirement in Canada is for empirical design, are there any Canadian engineers
out there with an opinion on whether this requirement is binding or not ?
If I do a rational analysis and show that the expected shrinkage over 2 stories
can be taken up with a single shelf angle, I think that it would satisfy the
code, since it would not be an empirical design, and so would not come under
I would ask my
friendly building official, but we don't have them in Quebec. So no-one is
going to challenge my decision, but I would like to do the right thing
anyway. Some of professional ethics thing I suppose.
Kevin Below, ing., Ph.D.
GÉNÉCOR CIVIL INC.
290, rue Seigneuriale
Beauport, (Québec) G1C 3P8
Tél. : (418) 660-6969 poste 272
Fax : (418) 660-6463
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