Schumacher - Structural LetterWESTSHORE
DESIGN ENGINEERS, P.C.
6279 JOHNSTON RD.
ALBANY Ϳ NEW YORK Ϳ 12203
WestShore Design Engineers ۅ 6279 Johnston Rd. ۅ Albany, NY 12203
Subject: Schumacher Residence
21 West Parsons Lane
Northampton, MA
To Whom It May Concern,
The following references the Schumacher Residence in Northampton, MA:
1. Existing roof framing:
Conventional framing is 2x8 at 16”o.c. with collar ties a`nd a 15’ span (horizontal rafter
projection). This existing structure is capable to support all the loads that are indicated below for
this photovoltaic project.
2. Roof Loading:
- 4psf dead load (modules plus mounting hardware)
- 40psf ground snow load
- 6.2psf roof materials (2.2psf 2x8, 1.5psf sheathing, 2.5psf asphalt shingles)
- Exposure Category B, 125mph wind (3 sec.)
This installation design will be in general conformance to the manufacturer’s specifications, and complies
with all applicable laws, codes, and ordinances, specifically the International Building Code/IBC 2015
and International Residential Code/IRC 2015 including all MA regulations and amendments. The spacing
and fastening of the mounting brackets is to have a maximum of 48”o.c. span between mounting brackets,
staggered, and secured using 5/16” diameter corrosive resistant steel lag bolts.
Thank you.
Westshore Design Engineers
June 18, 2024
John Eibert Nicolas Nitti, PE
Director of Solar Operations. President
To: Insight Solar
59C North St.
Hatfield, MA 01038
Date: June 18, 2024
Ref.: 24060273