6 INTERVALE RD - BPA-14-1655 -I y — s s 2--7 3 .cK
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The Commonwealth of Massachusetts
Board of Building Regulations and Standards CITY OF
Massachusetts State Building Code,780 CMR 2cvl.ed 4M NJ/I
a r
Building Pennit Application To Construct, Repair, Renovate Or Demolish a
One-or Two-Family Dwelling
This Section For Offic' Use Only
Building Permit Number: Dat Applied:
Building Official(Print Name) Signature Date
SECTION 1:SITE INFORMATION
1.1 Property AddZress: 1.2 Assessors Map&Parcel Numbers
� � va,lQ �d
I.I a Is(his an accepted street?yes x no Map Number Parcel Number
1.3 Zoning Information: 1.4 Property Dimensions:
Zoning Distna Proposed Use Lot Area(sq fl) Frontage(R)
1.5 Building Setbacks(ft)
Front Yard Side Yards Rear Yard
Required Provided Required Provided Required Provided
1.6 Water Supply:(M.O.L c.40,§54) 1.7 Flood Zone Information: 1.8 Sewage Disposal System:
Public❑ Private❑ Zone: _ Outside Flood Zone? Municipal❑ On site disposal system ❑
Check ifyes❑ -
SECTION 2: PROPERTY OWNERSHIP'
2.1 Owner'of Record: Paul Erwin
Name(Print) Cil ,Stale,ZIP
6 Intervale Rd. 978 4-9374 Deberwin3@comcast.net
No.and Street Telephone Email Address
SECTION 3:DESCRIPTION OF PROPOSED WORK'(check all that apply)
New Construction X I Existing Building❑ Owner-Occupied ❑ Repairs(s) ❑ Alteration(s) ❑ I Addition ❑
Demolition ❑ 1 Accessory Bldg.❑ Number of Units_ Other ❑ Specify:
Brief Description of Proposed Work':
DhoiovnlEcilG Sotct- 5NS�.v1&
�r�YJGC 1.a �
SECTION 4:ESTIMATED CONSTRUCTION COSTS
Item NEstimatedOfficial Use Only
1.Building 1. Building Permit Fee:$ Indicate how fee is determined:
2. Electrical ❑Standard City/Town Application Fee
❑Total Project Cost'(Item 6)x multiplier x
3. Plumbing 2. Other Fees:4. Mechanical (HVAC) List:
5.Mechanical (Fire Su ression) Total All Fees:$
Check No. Check Amount: Cash Amount:_
6.Total Project Cost: $ l 13 Paid in Full 0 Outstanding Balance Due:
` SECTIONS: CONSTRUCTION SERVICES
5.11-Construction Supervisor License(CSL) 04�2-5 4 s 28
dv
yuteS fZ"1\eYfV La n License Number Expiration k5afe
Name of CST,Holder
Il kph S I Y e List CST,l ype(see below) U
No.and Street L!f" I 1 hype Description
S—LLG WS �"l n 1 k Q'!]I C)� U Unrestricted(Buildings u to 35,000 cu.ft.)
_ R Restricted 1&2 Fanuly Dwelling
City{Town,$ 7_IT, M Masmt
RC RoofingCovering
WS Window and Siding
_ SF Solid Fuel Bunting Appliances
�dl�J Yi/lri.`1jD�31'�V�U[V�rp[W 1 Insulation
Tele hone Email address rr'1 D Demolition
5.2 Registered Home Improvement Contractor(HIC)
�/tlfmt �olal'De.yelopeY LLC. (-'0�`�8 t
1--- _ HIC Registration Number E pnat on ate
HIC Company Nauu`or HIC Rsgistranl Name
�-1�g31 N. :30D w . Yv�a�IGut�vtvtvL}go r.
No.and Street Entail address pssj tvt
Vo lTt- $t{I004 '7$'13 053 0 105
City/Town,State,ZIP Telephone
SECTION 6:WORKERS'COMPENSATION INSURANCE AFFIDAVIT(M.G.L.c. 152.§ 25C(6))
Workers Compensation Insurance affidavit must be completed and submitted with this application. Failure to provide
this affidavit will result in the denial of the Issuance of the building permit.
Signed Affidavit Attached? Yes.........� No-.........❑
SECTION 7a:OWNER AUTHORIZATION TO BE COMPLETED WHEN
OWNER'S AGENT OR CONTRACTOR APPLIES FOR BUILDING PERMIT
1,as Owner of the suhject property,hereby authorize Vl V 1✓)'f SO ICLy-
to act on my behalf,in all matters relative to work authorized by this building permit application.
ezZ &1- - 10/1 /14
Print Owner's Name(Electronic Signature) Date
SECTION 7b:OWNER'OR AUTHORIZED AGENT DECLARATION
By entering my name below,l hereby attest under the pains and penalties of perjury that all of the information
contained in I pl ' lion is true and accurate to the best of my knowledge and understanding.
Print 2tw s r rued Agent's Name(Electronic Signature) Date
NOTES:
I. An Owner who obtains a building permit to do his/her own work,or an owner who hires an unregistered contractor
(not registered in the Home Improvement Contractor(HIC)Program),will not have access to the arbitration
program or guaranty fund under M.G.L.c. 142A.Other important information on the HIC Program can be found at
www.mass.pov/oca Information on the Construction Supervisor License can be found at www.rnw.eov/des
2. When substantial work is planned,provide the information below:
Total floor area(sq.ft.) (including garage,finished basement/attics,decks or porch)
Gross living area(sq.ft.) Habitable room count
Number of fireplaces Number of bedrooms
Number of bathrooms Number of half/baths
'Type of heating system Number of decks/porches
Type of cooling system Enclosed Open
3. "Total Project Square Footage"may be substituted for"Total Project Cost"
f, �Qn� ry� o✓ C"J i �] i to s u r 4931 North 300 Nest
Structural Group Provo, UP 84604
P: (801)234-7050
Scott E. Wyssling, PE
Head of Structural Engineering scott.wyssling@vivintsolar.com
October 2, 2014
Mr. Dan Rock, Project Manager
Vivint Solar
24 Normac Road
Woburn MA 01801
Re: Structural Engineering Services
Erwin Residence
6 Intervale Road, Salem MA
S-3991641
7.75 kW System
Dear Mr. Rock:
Pursuant to your request, we have reviewed the following information regarding solar panel installation on the roof
of the above referenced home:
1. Site Visit/Verification Form prepared by a Vivint Solar representative identifying specific site information
including size and spacing of rafters for the existing roof structure.
2. Design drawings of the proposed system including a site plan, roof plan and connection details for the
solar panels. This information was prepared by the Design Group and will be utilized for approval and
construction of the proposed system.
3. Photovoltaic Rooftop Solar System Permit Submittal identifying design parameters for the solar system.
4. Photographs of the interior and exterior of the roof system identifying existing structural members and
their conditions.
Based on the above information we have evaluated the structural capacity of the existing roof system to support
the additional loads imposed by the solar panels and have the following comments related to our review and
evaluation:
Description of Residence:
The existing residence is typical wood framing construction with the roof system consisting of assumed 2 x 6
dimensional lumber at 16" on center. The attic space is finished and photos indicate that there was no access to
visually inspect the size and condition of the roof rafters. All wood material utilized for the roof system is assumed
to be Spruce-Pine-Fir #2 or better with standard construction components. Our review of the photos of the
exterior roof does not indicate any signs of settlement or misalignment caused by overstressed underlying
members.
Stability Evaluation:
A. Wind Uplift Loading
1. Refer to attached Ecolibrium Solar calculations sheet for ASCE/SEI 7-10 Minimum Design Loads for
Buildings and other Structures, wind speed of 100 mph based on Exposure Category "B" and 9 and 13
degree roof slopes on the dwelling areas. Ground snow load is 40 PSF for Exposure "B", Zone 2 per
(ASCE/SE17-10).
2. Total area subject to wind uplift is calculated for the Interior, Edge and Corner Zones of the dwelling.
Page 2 of 2
B. Loading Criteria
10 PSF= Dead Load roofing/framing 40 PSF= Live Load(around snow load)
5 PSF= Dead Load solar panels/mountino hardware
Total Dead Load=15 PSF
The above values are within acceptable limits of recognized industry standards for similar structures. Analysis
performed of the existing roof structure utilizing the above loading criteria indicates that the existing rafters will
support the additional panel loading without damage, if installed correctly.
C. Solar Panel Anchorage
1. The solar panels shall be mounted in accordance with the most recent "Ecolibrium Solar Installation
Manual', which can be found on the Ecolibrium Solar website (ecolibriumsolar.com). If during solar panel
installation, the roof framing members appear unstable, deteriorated, structurally compromised or deflect
non-uniformly, our office should be notified before proceeding with the installation.
2. Maximum allowable pullout per lag screw is 235 Ibs/inch of penetration as identified in the National Design
Standards (NDS) of timber construction specifications for Hem-Fir (North Lumber) assumed. Based on
our evaluation, the pullout value, utilizing a penetration depth of 2 '/2", is less than what is allowable per
connection and therefore is adequate. Based on the variable factors for the existing roof framing and
installation tolerances, using a thread depth of 2 11F with a minimum size of 5/16" lag screw per
attachment point for panel anchor mounts should be adequate with a sufficient factor of safety.
3. Considering the roof slopes, the size, spacing, condition of roof, the panel supports shall be placed at and
attached to no greater than every fourth roof rafter as panels are installed perpendicular across rafters
and no greater than the panel length when installed parallel to the rafters (portrait). No panel supports
spacing shall be greater than four(4) rafter spaces or 64"o/c, whichever is less.
4. Panel supports connections shall be staggered to distribute load to adjacent rafters.
Based on the above evaluation, it is the opinion of this office that with appropriate panel anchors being utilized the
roof system will adequately support the additional loading imposed by the solar panels. This evaluation is based on
information supplied to us at the time of this report and current industry standards and practices.
Should you have any questions regarding the above or if you require further information do not hesitate to contact me.
ery truly yours, "OF
I E CyR`
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Scott E.Wy ling, 0so
MA License No. ° 'c
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