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RE: metal bld'g. cable cross bracing

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Standing seam metal roofing is not capable of functioning as a flexible
diaphragm, therefore the metal building manufactures must place horizontal
diagonal bracing in the plane of the roof within the same bay as the lateral
bracing system (whether it's X-bracing or a portal frame) in order to
"collect" the wind forces that are present in the roof from the transverse
end wall reactions.

 -----Original Message-----
From: 	Mark Baker [mailto:shake4bake(--nospam--at)]
Sent:	Tuesday, March 12, 2002 12:51 PM
To:	seaint(--nospam--at)
Subject:	metal bld'g. cable cross bracing

We are presently doing foundation design for some metal buildings. We are
not responsible for review of manufacturers drawings but I am scratching my
head about something.

Is there something unique to manufactured metal buildings that allows them
to use both vertical (in wall) and horizontal (in roof) cable cross bracing
for lateral resistance?

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