Roof load question [RE-wrenches]

[Allan Sindelar]

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Wrenches,
We are proposing a non-penetrating roof-mount system for a commerical
installation.  We plan to use a UniRac SolarMount platform for this system.
Working through the calculations provided by UniRac, we determined the
ballast required for this system is 11 lbs. per sq. ft. excluding the
modules and rack.

My simple question is: what are flat roof building structures designed to
carry?  Are there any rules of thumb for this? I will require the customer
to get an engineers approval for this, but I would like to know up front if
this is ridiculous or in the ball park?
Thanks,
Randy

Randy Sadewic
randy at positiveenergysolar.com
Positive Energy
3225A Richards Lane
Santa Fe, NM  87507
Phone 505 424-1112
Fax 505 424-1113

Enjoy the Sun!

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