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SOLAR RECEIVED
Yarmouth, MA June 20, 2022
Town of Yarmouth1146 Route 28 JUL 12 2022
S. Yarmouth, MA 02664
BUILDING DEPARTMENT
RE: KENNEY, CHRISTOPHER T; KENNEY, SUZAI By _ — Trinity Solar No.
603 West Yarmouth Road 2022-04-690198
West Yarmouth, MA 02673
To the Building Official:
I hereby certify that I am a Licensed Professional Engineer in the State of Massachusetts. The solar photo-voltaic(PV)
system installed at the above-referenced location conforms to the manufacturers' requirements/specifications. The PV
system complies with all applicable laws, codes, and ordinances—specifically the International Building Code (2015
edition) and the International Residential Code (2015 edition), including all Massachusetts regulations and
amendments. Trinity Solar was on-site during the final inspection under direct supervision.
Regards,
Thor Bojcun, PE
Structural Engineer-Trinity Solar
BC
tiVIL
MA License No.56687
Trinity Solar 120 Patterson Brook Rd,Unit 10 I West Wareham,MA I(508)291-0007
SOLAR
Yarmouth, MA April 29, 2022
Town of Yarmouth1146 Route 28
S. Yarmouth, MA 02664
RE: KENNEY, CHRISTOPHER T; KENNEY, SUZAI Trinity Solar No.
603 West Yarmouth Road 2022-04-690198
West Yarmouth, MA 02673
To the Building Official:
The following information constitutes a summary of the relevant design criteria and recommendations for the support of a
new photovoltaic[PV] system on the existing roof framing components at the above-referenced location.
Criteria is as follows:
1. Existing roof framing:
Conventional roof framing is 2x6 at 16 o.c.; existing rafter span= 11' 0"; (horizontal projection)
2. Roof Loading:
• 3.0psf dead load (pounds per square foot- PV panels, mounting rails&hardware)
• 5.7psf-existing roof loads (1.7 psf-2x6 framing, 1.5psf roof sheathing, 2.5 psf shingles)
• Ground Snow Load-30psf-per AHJ (Authority Having Jurisdiction)
• Wind criteria- Exposure Category B, 140 mph wind
3. Existing Roof modification - none required; existing roof framing is acceptable for PV installation.
This installation design is in general conformance with the manufacturers' specifications and complies with all applicable
laws, codes, and ordinances—specifically the International Building Code (2015 edition) and the International Residential
Code (2015 edition), including all Massachusetts regulatiois and amendments.
The spacing and fastening of the mounting brackets is a maximum of 48"o.c. between mounting brackets (staggered) and is
secured using 5/16" diameter corrosive-resistant steel lag bolts.A minimum of 2%"of penetration (embedment) per lag bolt
is required, which will resist all stated loads above—including wind shear. Per NDS Section 12.1.4, clearance holes-equal
to the diameter of the shank-need to be bored into a primary framing member for the full-length of the threaded portion of
the bolt to avoid splitting of the framing member.
Regards,
Thor Bojcun, PE
Structural Engineer-Trinity Solar
iki 41441111110
MA License No.56687
Trinity Solar 120 Patterson Brook Rd,Unit 10 I West Wareham,MA I(508)291-0007