[RE-wrenches] Roof Loading request for help

[Bill Brooks]

Allan,

 

Check out my website at www.brooksolar.com/services. The recent Expedited
Permit Process that I helped produce for the US Dept. of Energy is on that
page in pdf that you can download. It explains the rationale behind why
anything under 5 PSF is fine if the roof structure is standard (engineered
trusses or typical rafter roof). Read it over a share it with your
jurisdictions. We are going to be maintaining the most recent version of
that document on the www.solarabcs.org website on their "documents" tab. It
should be posted soon. It also requires that you use a standard engineered
racking system such as DPW, UniRac, or ProSolar.

 

Bill.

 

 

 

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Allan
Sindelar
Sent: Tuesday, July 07, 2009 5:26 PM
To: 'RE-wrenches'
Subject: [RE-wrenches] Roof Loading request for help

 

Wrenches,

We are currently facing a city permitting bureaucracy that has recently
discovered solar - that is, suddenly each department in the permitting and
plan review departments is coming up with standards for PV systems. Some of
the standards, of course, make no sense. 

 

PV systems typically add about three pounds per square foot to the loading
on a roof. We are facing a city requirement for structural engineering work
for standard roof attachment if the mounting approach is to make
penetrations into the roof structure. This is a typical requirement that
will only add considerable cost to each PV system, and we're looking to have
our ammunition to fight this well stocked in advance. Specifically, are
building authorities in other jurisdictions requiring structural engineering
work for this type of roof attachment?

 

Thanks 

Allan

 

Allan Sindelar

Allan at positiveenergysolar.com

NABCEP Certified Photovoltaic Installer

EE98J Journeyman Electrician

Positive Energy, Inc.

3201 Calle Marie

Santa Fe, New Mexico 87507

505 424-1112

www.positiveenergysolar.com

 

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