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Re: Structural glass design

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I'm not sure if you're saying the lites of glass are too large or they are too
narrow.  I have found that tall lites of glass will generally be limited by
seismic requirements - interstory drift will cause the frame to rack which will
then cause glass/metal contact.  Or, large lites of glass will be limited by
either the deflection of the supporting members or the bearing stress of the
glass.  I have yet to see a lite that is too large for the setting blocks.  One
of the previous responses stated that a statistical analysis was required, which
is true.  However, we always leave that to the glass manufacturer.  Here is the
number for Pilkington Libby-Owens-Ford's Architectural Technical Services:
fax (419)247-4395

Someone there should be able to help you with your questions regarding the

"Fariborz Tehrani" <fmtehrani(--nospam--at)> on 12/06/99 03:46:49 PM

Please respond to seaint(--nospam--at)

To:   seaint(--nospam--at), agv(--nospam--at)
cc:    (bcc: Jack Creviston/Franklin/Kawneer)
Subject:  Re: Structural glass design

Thank you for comments. Now more specific question:
The minimum recommended length of setting blocks from Neoprene is 10% of
square footage of the glass panels but not less than 4". Also the maximum
compressive strength of silicone blocks is limited to 60psi. But the
architectural requirements doesn't let such lengths to satisfy these
requirements. Do you know any other design values that let me use harder
materials? And how can I measure the effect of bearing stress on the glass?
Is ther any limitation for chamber dimension at the glass edges?
Fariborz Tehrani,                      Phone: (310)509-8826
Civil Engineer                           Fax: (530)481-9532
BSCE, MSCE, PE                    Voice Mail: (877)743-6206
email: fmtehrani(--nospam--at)