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RE: Photovoltaic panel weights

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10psf is usually a good  number to start with. In the areas of the panels
you are allowed to reduce the 20psf live load to 10psf since no one can walk 
 with on gain access to those areas after installed. So in your area you
probably would want to add the 10 to the snow load.

Joe Venuti

-----Original Message-----
From: seaint-seaosc(--nospam--at) [mailto:seaint-seaosc(--nospam--at)] On
Behalf Of Drew Morris
Sent: Monday, March 17, 2014 12:35 PM
To: seaint-seaosc(--nospam--at)
Subject: [SEAINT-SEAOSC] Photovoltaic panel weights

I have a project were the client is interested in putting on a roof mounted
flush photovoltaic array on a new building.  The client is researching
through the vendors but i need to get an approximate dead load to do some
sizing on roof joists.  Any ball park figures I can use,
10 psf?

Drew Morris, PE*| Project Engineer
BBFM Engineers, Inc. <>
510 L Street, Suite 200 | Anchorage, Alaska 99501
Ph: (907)274-2236 | Direct: (907)270-2240 | Web:

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