06-064 (13) November 29, 2016 /41 (�i/_ ' 1°
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To: Inspectional Services
From: Rachel Bruso—Trinity Solar
Subject: Revised Engineer Letter
Attached please find the revised engineer letter for the solar installation done at 2 Beaver Brook Loop,
property owned by Brad Carmody.
If there are any questions, please feel free to let me know.
Thank you very much!
Rachel B-a '
Rachel.Bruso@trinitysolarsystems.com
413-203-9088 Ext. 1511
Trinity Solar
4 Open Square
Suite 410
Holyoke, MA 01040
Richard B. Gordon, P.E.
P.O. Box 264•Farmville•VA 23901
Ph: 434.315.5759.E-mail: grichardpe@aol.com
November 22,2016
Leeds Building Department
Leeds,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:
Roof 1 Garage: AJS 20 14"joist 12"o.c.25'span (horizontal rafter projection)
Roof 2 House:AJS 20 14"joist 16" o.c. 11'-1"and 18'6"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)
• 24 psf snow live load(40 psf ground snow live load reference)
• 6.75 psf dead load roof materials(2.25 psf AJS 20 framing, 2 psf metal roof,1.5 psf''/:"wood sheathing
plywood)
• Exposure Category B, 106 mph wind uplift live load of 16.6 psf(wind resistance)
3. Address of proposed installation: Residence of Brad Carmody, 2 Beaver Brook Loop, Leeds, 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. The spacing and fastening
of the mounting brackets is to have a maximum of 64"o.c. between mounting brackets and secured using 5/16"diameter
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.3" penetration of lag bolt per bracket,which is adequate to resist all 106 mph wind live
loads including wind shear. Seam clamp method being used to mount-attach system on roof, by SnapNrack.
Very truly yours, /On
Richard B.Gordon,P.E. o
Massachusetts P.E. License No.49993 E a CHARs
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