12 LAURENT ROAD - BUILDING INSPECTION i
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Commonwealth of Massachusetts
City of Salem
T 120 Washington St,3rd Floor Salem,MA 01970(978)745-9595 x5641
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Return card to Building Division for Certificate of Occupancy
Permit No. B-15-479
EE PAID: $238.00 PERMIT TO BUILD
DATE ISSUED: 6/2/2015
This certifies that BLACKWELL GEORGE H III BLACKWELL KATHERINE E
has permission to erect, alter, or demolish a building 16 LAURENT ROAD Map/Lot: 240026-0
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as follows: Solar Panels INSTALL 7 28 kW SOLAR PANELS ON ROOF (WILL NOT EXCEED ROOF
PANEL, BUT WILL ADD 6, TO ROOF HEIGHT )
Contractor Name: GREGG LACASSE �° F t1 1514
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Contractor License No: CS-103631 ��. IF
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This permit shall be deemed abandoned and invalid unless the work authorized by this permit is commenced within sixy months after issuance.The Building Official
may grant one or more extensions not to exceed six
months each upon wntten request 'f $`°
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All work authorized by this permit shall conform to the approved apphcafion and the approved constru,c.iton documents for which this permit has been granted.
h.All construction,alterations and changes of use of any Buildingand structures shall be in compliance with the local zoning by-laws and codes.
This permit shall be displayed in a location clearly visible from access street or road and shall be maintained open forpublie inspection for the entire duration of the
work until the completion of the same. V1'4 Aa ' it i"" g d ;i� ' !i `'s"
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The Certificate of Occupancy will not be issued until all applicable signatures by the Building and Fire Officials areprovided on this permit.
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HIC#: 170355 Persons contracting with unregistered contractors do not have access to the guaranty fund"(as set forth in MGL c.142A).
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Restrictions: ? F I, lei
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Building plans are to be available on site.
All Permit Cards are the property of the PROPERTY OWNER.
Optimize Engineering Co., LLC
P.O. Box 264•Farmville•VA 23901
Ph: 434.574.6138•E-mail: grichardpe@aol.com
Richard B. Gordon, P.E.
President
June 19, 2015
Salem Building Department
Salem,MA Re: Solar Panels Roof Structural Framing Support
To Whom It May Concern:
I hereby certify that I am a Licensed Professional Engineer in the State of Massachusetts. Please note the
following conclusions regarding framing structure, roof loading,and proposed site location of installation:
1. Existing roof framing: Conventional framing is 2x6 at 16"o.c.& 10'-4"span (horizontal rafter
projection). This existing structure is definitely capable to support all of the loads that are indicated
below for this photovoltaic project.
2. Roof Loading
• 4.33 psf dead load (modules plus all mounting hardware)
• 31.5 psf snow live load (45 psf ground snow live load reference)
• 4.5 psf dead load roof materials
• Exposure Category B, 115 mph wind uplift live load of 19.6 psf(wind resistance)
3. Address of proposed installation: Residence of George Blackwell, 16 Laurent Rd.Salem, MA
This installation design will be in general conformance to the manufacturer's specifications,and is in
compliance with all applicable laws,codes,and ordinances,and specifically, International Residential Code/
IRC 2009,2011 NEC,and 2012 ICC Energy Code. The spacing and fastening of the Unirac mounting
brackets is to have a maximum of 64"o.c.span along the rail between mounting brackets and secured using
5116"x 3 Yz" length corrosive resistant steel lag bolts. In order to evenly distribute the load across the roof
rafters,there shall be a minimum of 2 mounting brackets per rafter&min.2" penetration of lag bolt per
bracket,which is adequate to resist all 115 mph wind live loads including wind shear. The mounting
brackets shall alternate between adjacent rafters between rail rows for better distribution of roof load.
Penetration of anchors for modules mounted within 18"of ridge and edges of roof is to be a minimum of 3".
Rails may be attached to either of two mounting holes in the L-feet.Mounting in the lower hole for a low
profile,more aesthetically pleasing installation or mount in the upper hole for a higher profile to maximize
airnow under the modules to cool them more.Slide the 3B-inch mounting bolts into the footing bolt slots.
The rails will be attached to the footings with the flange nuts.
Very truly yours,
Optimize
Engineeripg Co., LLC
Richar or n, P.E.
Massachusetts P.E. License No.49993
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