32 BUENA VISTA AVE - BPA-14-1563 v e. r (r�.asitf
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The Commonwealth of Massachusetts LI OF
tom# i� Board of Building Regulations and StandardsCITY
Massachusetts State Building Code,780 CMR SALEM
a, Revised A4ar 2011
Building Permit Application To Construct,Repair, Renovate Or Demolish a
One-or Two-Family Dwelling
This Section For Official e Only
Building Permit Number: Date A/plied:
rur n /
Building Official(Prim Name) Signature Dale
SECTION 1:SITE INFORMATION
I l _pS J
``4V r�\ ^ n 1.2 Assessors Map&Parcel Numbers
L 1 a Is this an accepted street?yes X (11\o,V\.t Map Number Parcel Number
1.3 Zoning Information: 1.4 Property Dimensions:
Zoning District Proposed Use Lot Area(sq R) Frontage(R)
1.5 Building Setbacks(it)
From Yard Side Yards Rear Yard
Required Provided Required Provided Required Provided
1.6 Water Supply:(M.C.L c.40,§54) 1.7 Flood Zone Information: 1.8 Sewage Disposal System:
Public❑ Private❑ Zone: _ Outside Flood Zone?Check ifyes0 Municipal❑ On site disposal system ❑
SECTION 2: PROPERTY OWNERSHIP'
2.1 Owner'ofRecord:PIIIIIpAskew 1�nIepyl
Name(Print) City,State,ZIP
32 Buena vista ave. 978-745-7906 Kingwiz@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) ❑ Addition ❑
Demolition ❑ Accessory Bldg.❑ Number of lJnits_ Other ❑ Specify:
Brief Description of Proposed Work':
P—VAo DV n N-r i1c. Solar SyS-teyYlS
SECTION 4:ESTIMATED ONSTRUCTION COSTS -
Item Estimated Costs:
Labor and Materials) Official Use Only
I.Building $ (Q (o 1. Building Permit Fee:$ Indicate how fee is determined:
2.Electrical ❑Standard C(ly/Iown 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: $ - 0 Paid in Full 0 Outstanding Balance Due:
SECTION 5: CONSTRUCTION SERVICES
5.1 _Construction Supervisor License(CSL) Oq 2 S 4
Jo S 2$
,meS t y\e-r�QYI License Number Expi anon ate
Name of CSL Holder
2 l �kCLI 0 List CSI.Type(see below) U
No.and Street ppt IXppI fyPe Description
SQ �S 1�11 agdLP III Unreslricted(Buildings u to 35,000 cu.ft.)
_1 R Restricted 1&2 FamilyDwelling
City/Twvn,S t IP M Mason
ry
RC Roofin Covenn
WS Window and Sidin
f3 W SF Solid Fuel Homing Appliances
�Y�V(Vtrpvyu�� 1 Insulation
Tele hone Email address r� D Demolition
5.2 Registered Home Improvement Contractor(HIC)
\ill/IV+ 15�010l1'D2.V �ODr LAG l fo`5 k8 1
-- — HIC Registration Number E tarat on Dale
HIC CotnFany Name or HIC R gis[rant Name
4�31 N. SOD �. Yv�ASolCuc�VwtvtA-Ss0hy.
No.and Street
Valor ur `64toc) } -1$1305 OlpS Email address CE)yvt
Cit /Town,State,ZIP Tele hone
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 VI V JVA-f Sty I a. —
to act on my behalf,in alters e11 tive w work authorized by this building permit application.
I� 9/23/14
Print Owner's Name(Electronic Si a e Date
SECTION 7b:OWNEW OR AUTHORIZED AGENT DECLARATION
By entering my name below, I hereby attest under the pains and penalties of perjury that all of the information
contained in IN p lion is true and accurate to the best of my knowledge and understandin It
Print Ow �s r rued Agent's Name(Electronic Signamrc) 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 fund under M.G.L.c. 142A. Other important information on the HIC Program can be found at
www.massj!ov/oca Information on the Construction Supervisor License can be found at www.mass eov/dos
2. When substantial work is planned,provide the information below:
Total Floor area(sq.0.) (including garage,finished basement/attics,decks or porch)
Gross living area(sq.R.) 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"
0
vuvoY Y Y. solar 4931 North 300 Nest
Structural Group Provo,UT 84604
P: (801)234-7050
Scott E. Wyssling, PE
Head of Structural Engineering scott.wyssling@vivintsolar.com
September 19, 2014
Mr. Dan Rock, Project Manager
Vivint Solar
24 Normac Road
Woburn MA 01801
Re: Structural Engineering Services
Askew Residence
32 Buena Vista Avenue, Salem MA
S-3992938
4.335 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 2 x 6 dimensional
lumber at 16" on center. 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 24 and 27
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.
vivint. solar
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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/mounting 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. Roof 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 Yz', 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 1/2' 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,
O 42m E Cyr
Scott E.Wy ling, P clvi
MA License No. : 'g
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Inverter Ratings(Guide Section 4)
m.eder MaxelMWel Enter—Mel5e0-2LL-s2i Conduit and Conductor Schedule
MODULE DETAIL Max GC Volt Rating 45 Volk Teg Desaip4nn Wire Gauge anmnnduclnrs CoulType CorralSo
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Nominal AC Voltage 240 1 Enpnaee engage cede-THwN-2 12 AWG I Com N/A-Free Air
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Max Number or limelecircuil iT 2 THWN-2-Ground eAWG PVC I. }W{
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WITH ECO HARDWARE SOCKET MEET THE REQUIREMENTS? Open-circuit VOltage(V«) 31L7 Volts /I' 0
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3.)SIZE PHOTOVOLTAIC POWER SOURCE(OCT CONDUCTORS Mex Sedes Fuse(OCPO) - 15 Amps
BASED ON MAX CURRENT ON NEC 690.53 SIGN OR Oxi Nominal Maximum Power at STC(Pril 255 Walls
MICROINVERTER CONNECTION RATING AT DISCONNECT. Maximum System Voltage 10o0(IECy600(UL) j
TO ENGAGE TRUN K CABLE 4.)SIZE INVERTER OUTPUT(AC)CONDUCTORS ACCORDING V«Temperature CoeFcient0.32 Hd°C
^ TO INVERTER OCPD AMPERE RAT(No(See Guide SeIXion 9).
V 5.)TOTAL OF 1 INVERTER OCPD(s).ONE FOR EACH NOTES FOR ARRAY CIRCUIT WIRING(Guide Section 6 and 0 and Appendix D):
PV CIRCUIT.DOES TOTAL SUPPLY BREAKERS COMPLY
WITH 120%BUSBAR EXCEPTION IN 1.)Lexical expected ambient temperature based on ASHRAE minimum mean extreme
NEC 690.64(B)(2)(al XYES NO dry bulb temperature for ASHRAE location most similar to Installation location: -19°C
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for ASHRAE
locattnmpersWrebasedon ASHRAE highest39-C 2%tlry bulb
temperature for ASHRAE location most similar to installation location: 39°C
Sign for inverter OCPD and AC Disconnect 3.)2005 ASHRAE fundamentals 2%design temperatures do not exceed 47°C in the
United Stales(Palm Spring,CA is 44.1°C).For less than 9 current-carrying conductors
Solar PV System AC Point of Connection in
roof-mounted sunlit conduit at least es above mot and using the outdoor design
AOONput Cmmdt 15,300000 Amps temperature of 47°C or less(all of United Slates).
Nominal AC Voltage ml Volts a.)12 AWG,90°C conductors are generally acceptable for modules with Ise of 7.60 Amps ?
or less wfied pmlected by a 12-Amp or smaller fuse. iS
THIS PANEL FED BAND LTIPLESOLAR SOURCES bJ 10 AWG.90°C conductors are generally acceptable for modules with Ise of 9.6 Amps
(UTILITY AND SOLAR) or less when protectedb a 15-Amp or smaller fuse.
NOTE: NEUTRAL CONDUCTOR(S)OMITTED FOR CLARITY a
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