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9. The Commonwealth of Massachusetts SLY I L, .
.CITY OF:
Board of Building Regulations and Standards
SALE
�� Massachusetts State Building Code,780 CMR - Revised Mnr420//
Building Permit Application To Construct,Repair, Renovate Or Demolish a
One-or Two-Fandly Dwelling
This Section For Official Use Only
Building Permit Number: Date Aed:
S
Building Official(Print Name) Signature Date
SECTION 1:SITE INFORMATION
LI Property Address: 1.2 Assessors Map&Parcel Numbers
���, � I�oXYnVL��-el c�
I.to Is this an accepted street?yes x no Map Number Parcel Number
1.3 Zoning Information: 1.4 Property Dimensions:
Zoning District Proposed Use Lot Area(sq fl) Frontage(8)
1.5 Building Setbacks(B)
Front Yard Side Yards Rear Yard
Required Provided Required Provided Required Provided
1.6 Water Supply:(M.G.L c.40,§54) 1.7 Flood Zone Information: 1.8 Sewage Disposal System:
Public❑ Private❑ Zone: _ Outside Flood Zone?
Check ifyes❑ Municipal❑ On site disposal system ❑
SECTION 2: PROPERTY OWNERSHIP'
2.1 Owner'of Record: William Bradford Salewl VA
Name(Print) t , tat , 1
30 Buena Vista Ave. 970d t 1dT2 Estherb3@verizon.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 ❑ I Repairs(s) ❑ IAlteration(s) ❑ Addition ❑
Demolition ❑ 1 Accessory Bldg.❑ Number of Units_ Other ❑ Specify:
Brief Description of proposed Work:
V }0.IC. Solo-r
�t?
SECTION 4:ESTIMATED CONSTRUCTION COSTS
Item Estimated Costs:
Labor and Materials) Official Use Only
I.Building SSa .C)Q I. Building Permit Fee:$ Indicate how fee is determined:
2.Electrical g ❑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 $
Suppression) Total All Fees:$
Check No._Check Amount: Cash Amount:_
6.Total Project Cost: $ ` 13 Paid in Full 0 Outstanding Balance Due:
SECTION 5: CONSTRUCTION SERVICES
5.11-Construction Supervisor License(CSL) 6�S 2 4 � 2g, -,�
�yy<es 2-)her L x iax) License Number E atwn ae
Name of CSL Holder
�L �ka. y) S l r l List CSI.'Iype(see below) U
No.and Street I r' 1 Type Description
S0.61.G (ems Z �4A oIot b e U Unrestricted(Buildings up to 35,000 cu.ft.)
R Restricted I&2 FamilyDwelling
Cil}•/Town,S• 7_IP M Mason
ry
RC Roofin Coverin
WS Window and Siding
_ ',����" SF Solid Fuel Hunting Appliances
1FsIB MLLzaitarp-VIVtr cytau l! I insulation
T Ile hone Email address r) D Demolition
5.22 R�e�giistereedd.Home Improvement Contractor(HIC)
—'r-`VIVI ` SO'ar `�eVe-licip LLC' HIC Registration Number E,r�piSra[{lon-�at'e
HIC Company Name or HIC R gistrant Name
4g31 N. SOD �. yo-a 1pxa VkvIV solcir
No.and Street Email address
ProYo ur '64Loo4 1$13o53o1p5
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 subject property,hereby authorize VIV i rlt Sfl ICLr
to act on my behalf,in all matters relative t,o work authorized by this building permit application.
(Ahk Oa L) 9/10/14
Print Owner's Name(Electronic Signature) Date
SECTION 7b:OWNEW OR AUTHORIZED AGENT DECLARATION
By entering my name below, I hereby attest under the pains and penalties of peijury that all of the information
contained in III P It is true and accurate to the best of my knowledge and understanding.
O-r-- g -((
Print Ow s r rizedAgent's Name(Electronic Signature) Date
NOTES:
1. 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 fiord under M.G.L.c. 142A. Other important information on the HIC Program can be found at
www.mass.gov/oca Information on the Construction Supervisor License can be found at www.rna2L.gov/d-Ps
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"
v0von Y O s o l a r 4931 North 300 West
Structural Group Provo,UT84604
P: (801)234-7050
Scott E. Wyssling, PE
Head of Structural Engineering Scott.wysslingt7a vivintsolar.com
September 11, 2014
Mr. Dan Rock, Project Manager
Vivint Solar
24 Normac Road
Woburn MA 01801
Re: Structural Engineering Services
Bradbury Residence
30 Buena Vista Avenue, Salem MA
AR#3231197
2.75 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 VisitiVerification 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 2 x 6
dimensional lumber at 16" on center with 1 x 8 collar ties every 48". The attic space is unfinished and
photos indicate that there was free 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
20 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.
vivi t. solar
r
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/mountina 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. Root Structure Capacity
1. The photographs provided of the attic space and roof rafters show that the framing is in good
condition with no visible signs of damage caused by prior overstressing.
D. 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
W', 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
Ili' 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.
Ve truly yours, ESN OF
CIVI y
Scott E.Wyssl PE 0 50
MA License N .50 90F FGISTEP�
FSSIONAL
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