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Fw: Tying of veneer to timber structure

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----- Original Message -----
Sent: Friday, August 20, 2010 6:38 PM
Subject: Tying of veneer to timber structure

REPLY:
 
There is several types of veneer ties available in Australia and the US should not be different
in that respect. One type has nails working in tension, the other in shear.
The latter type is nailed from inside, to the studs, after bricklaying is done.
 
The first type, where either nails or screws are in tension due to lateral forces
should be avoided. They are meant to be attached by two fasteners.
A bricklayer or a stone mason, when left to themselves, will only use one,
to save work, unless someone is inspecting on continuous basis.
This makes them rather useles.
 
There is, of course, another type, often employed in retrofit:
A stainless steel threaded rod, screwed from outside, thru brick and into timber.
It can also be used for connecting the leaves in double brick construction.
 
Sincerely, Gregory from Oz
 
 

Question:

I think the latest recommendations I've heard for stone veneer anchorage
are still fairly similar to the brick requirements. The significant
change for both in high-seismic regions is to use annular threaded/ring
shank nails or screws to attach the tie to the backup. Recent seismic
testing of masonry veneer assemblies shows that standard nails don't
have enough withdrawal strength to avoid pullout of the ties during
out-of-plane shaking. With threaded nails or screws the tie remained
attached to the backup; the brick eventually fell off the ties at SDC E
level shaking.