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RE: Design Criteria for Falling Ice

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Josh,

I have designed several structures to protect equipment located below
falling ice and snow. Basically, evaluate the ice mass and height of fall to
estimate the energy. Then evaluate how much energy is absorbed by the ice
fracturing or snow compacting. The resulting needs to be resisted by the
protective structure.

Or just use a sloped steel plate.

Bill

-----Original Message-----
From: Josh Comfort [mailto:jcomfort(--nospam--at)ggbse.com]
Sent: Monday, March 06, 2006 10:12 AM
To: seaint(--nospam--at)seaint.org
Subject: Design Criteria for Falling Ice


Does anyone have recommendations for designing a structure to withstand
forces from falling ice?

I'm working on a repair/retrofit for a building that is located very close
to a 225' tall transmitter tower where some falling ice recently caused a
failure and partial collapse of the roof framing.  I am unaware of any
design standards for falling ice and was curious if anyone out there has any
experience with this type of problem.

Thanks.

Josh Comfort, P.E.



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