HomeMy WebLinkAboutAs-Build Solar Panel AFC
Tom Petersen
Architects • Planners e0� ANj,?
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Construction Official January I0,
Building Department for project at:
13 MacKenzie Road
South Yarmouth,MA 02664
Re: Solar Panel Installation—As-built Certification,Permit#BLD-20-002553
Colina Residence
13 MacKenzie Road
South Yarmouth, MA 02664
Dear Sirs,
I've reviewed the as-built solar panel installation at this location to evaluate the existing roof
structure and the connection of the panels to the roof.
Criteria: Applicable codes: MA State Building Code—780 CMR,96 Edition
(2015 International Residential Code with MA Amendments)
2015 Wood Frame Construction Manual
Design roof load: 30 psf live load, 10 psf dead load,40 psf total load
Design wind load: 140 mph,35 psf: Exposure Category 'B'
My findings are as follows.
1. The new solar panels will imply an additional dead load of 3 psf. The existing roof structure
(2x6 roof rafters @ 16"o.c..with 2x8 ridge,span =+/- 10'-6") is sufficient to bear this
additional load.
2. The solar panels are attached to the roof with the SolarMount-1 rack system by UNIRAC. The
rack system, roof connections and connection spacing are rated for 140 mph. This project
requires the larger Solar Mount I-2.5 beam(2.5"high)and spacing of flange foot connection to
roof at 48"o.c. maximum. Flange footing connections to the rail are not required to be staggered.
The flange foot connections to the roof are 5/16"diameter x 4"long lag bolts.
The as-built installation is in compliance with these specifications,building codes and all
manufacturers requirements and recommendations.
I therefore certify that the actual installation complies with the applicable codes and design loads
mentioned above and is acceptable for approval. Please let me know if you have any questions
on this information. Thanks!
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Neal Holmgren, Solar Rising LLC
6 Country Lane•Howell, New Jersey 07731 •Telephone 732-730-1763,Fax 732-730-1783