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RE: Snow Loads

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I don't know of any published literature, but one of the main guys writing
these provisions for ASCE 7 is Mike O'Rourke of Rensselaer Polytechnical

You might also contact RWDI at

Harold Sprague
The Neenan Company

-----Original Message-----
From: Barry H. Welliver [mailto:wellive(--nospam--at)]
Sent: Wednesday, September 08, 1999 4:49 PM
To: seaint(--nospam--at)
Subject: Snow Loads

What are some references for obtaining background information on the
following topics related to UBC requirements for snow loading:

1.    Exposure factors Ce from Table A-16-A. Specifically, what are the
definitions for densely forested or sheltered areas.

2.    Roof slope reduction factors. Also, are there shapes and/or
surfaces which would qualify for some measure of snow load reduction?

I am familiar with drift load code requirements from work published in
the ASCE Structural Journal in the 80's but am curious if there are any
further developments or design information.

Anyone know of any text devoted to structural design for snow loads and


Barry H. Welliver