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RE: Pre-Engr. Mtl Bldg. W/ Tilt-up Wall

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Rich,

I will second what Brian Smith said.  We have done it both ways he
described, but typically we prefer to use the wind girt (method 2).

If you have designed the panels to span horizontally (column to column),
make sure the metal building manufacturer designs their columns to
resist wind loads from the panels.  In the past when we have designed
this way, I do not remember using weld plates attaching the top of panel
to the eave strut.  I think the panel may have been held down so the
eave purlin could pass over the panel and support the gutter.


Mark 



-----Original Message-----
From: seaint04(--nospam--at)lewisengineering.com
[mailto:seaint04(--nospam--at)lewisengineering.com] 
Sent: Monday, October 01, 2007 11:47 AM
To: seaint(--nospam--at)seaint.org
Subject: Pre-Engr. Mtl Bldg. W/ Tilt-up Wall

I'm working on the design of a small warehouse using pre-engineered
metal building framing and tilt-up wall construction.  I've never had a
mix of the two systems before, but I know it is done.

I'm detailing the sidewall where the deck comes down on the eave strut
and overhangs the wall panel.  I'm wondering though about the strength
of the roof deck to brace the panel horizontal forces.  Typically the
deck is screwed to the eave strut and if this were a complete metal
building, the wall panel would be screwed to the eave strut.  I have a
weld plate in the wall panel to weld the eave strut to.  My concern is
the screws of the roof panel to the eave strut are not strong enough to
support the wind loads.  I'm wondering if in this condition there
typically are braces back to the top flange of the next Zee purlin.  If
so, how is this typically detailed?  I do have the panel braced
horizontally by the metal building columns at the ends, which means it
spans 20 ft. horizontally.

Also, I've been hunting for details on the internet of metal buildings
and tilt-up wall panels.  I ran across some a while back and never
bookmarked the page.  I have not found a metal building suppliers
website with typical details using concrete wall panels in my current
search.  Anyone have links to supplier's details using tilt-up panels?

Thanks for your help.

Rich


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