Town of Palmer (MA)

Codes

NEC Code Version

2023

Fire Code Version

2018 Building Code

Code List

10TH EDITION OF THE MA STATE BUILDING CODE 780

2021 INTERNATIONAL BUILDING CODE W/780 CMR

2021 INTERNATIONAL RESIDENTIAL CODE W/780 CMR

2021 INTERNATIONAL EXISTING BUILDING CODE

2021 INTERNATIONAL MECHANICAL CODE

2021 INTERNATIONAL ENERGY CONSERVATION CODE

2021 INTERNATIONAL FIRE CODE

2023 NATIONAL ELECTRICAL CODE

ASCE Code Specification

ASCE 7-16

SolarAPP+ & submittal

SolarAPP+ Status

Targeted

Any SolarAPP+ Restrictions

1

SolarAPP+ Restrictions

MPU,Derate

How Many Plansets Required

2

Revision Required

0

New Planset Required For Module Swap

0

Stamps

Ee Stamp Required On SLD

No

Wet Stamps Required

Digital Structural

Structural Calculations Required

Yes

Ee Stamp Notes

No EE required

Stamp Location On Plans

Unspecified

Date On Stamps

Expiration Date

Fire setbacks

Fire Setback Enforced

1

Setback Notes

Standard

Structural & loads

Wind Speed

121

Wind Notes

Exposure Category B

Snow Load

40

Reducible Snow Load Allowed

0

Max Attachment Spacing

96

Structural Notes

The engineer letter for the project, and every single roof mounted solar array application in Palmer, will need to include specific details on the roof framing to show that the roof is strong enough to hold the arrays. This will include the size, species and grade, spacing and span of the rafters for EACH roof section getting a solar array. If the roof sections are the same, that will need to be noted. The engineer letter needs to match the plans and label the roof sections accordingly. If there are any additional supports, i.e knee walls, purlins, etc. they will need to be included in the letter along with what type of support it is and how it is supported down to the basement. Any lower roof sections, porches, or anything else that is under a roof section with an array will need to be checked for impact loads from sliding snow. Any characteristics of the roof that are not considered “typical” framing, such as hips or valleys, will need to be checked for piling snow. To sum it up, the first page of the engineer letter should state exactly how the roof is framed and exactly what is being approved for the additional loading of the solar arrays. Additional details can be given in the following pages from the engineer but only to support what is written in the first page. On PE calcs, all mounting planes must show individual calculations rather than a combined calculation for all mounting planes together.

Minimum Ground On Roof

#10

Electrical

Electrical Load Calcs Required

Derates

Allowed POI

PV Breaker,Load Side Taps,Line Side Taps,Meter Adapter

Panel Schedule Required

Partial Home Backup

Temperature Rating

90

De Rating Ampacity

1

Battery / ESS

Unique Battery Placards Needed

0

ESS Notes

Elevation diagram required Show location of smoke detectors/alarms Provide floor layout with spaces labeled for use, ventilation to meet manufacturer's specifications, and protection from impact Installation manual for ESS required

Separate ESS Disconnect Required

ESS Disconnect

ESS Elevation Detail Required

Yes - with dimensions

Plan set

Plan Set Requirements

***All submitted plansets must meet ALL criteria listed on Palmer Solar Permit Requirement checklist (see attached document) or be rejected*** OneDrive

ALL JOBS: The Inspector for this AHJ is VERY particular. Do not take for granted that the roof pitch protractor shown on one roof plane and the Site Tech's notes for pitch covers all of the roof. If there is not a protractor photo or note about pitch for the specific roof plane you are designing for send for another site audit to get that info. This Inspector will kick it back if there is a notable difference and it is not shown on the plans.

Roof Plan

• Show distance from panels to roof edges
• Photos required: all 4 full sides of the house, edge of roof showing number of layers of shingles, attic access, attic framing, measurements of rafter depth, span, spacing, and any span breaks

Attachment Detail

Installs on multiple layers of comp shingle are not allowed. Single layer installs only

Ground mount

Ground Mount Fencing Required

Mesh/Scrim