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20 BARNES CIR - BPA-14-1464 SOLAR RECEIVED INSPECTIONAL SERVICES 9 The Commonwealth of MassachmAs Board of Building Regulations and Standards CITY OF Massachusetts State Building Code,780 CMR SALEM Revised Mar 2011 Building Permit Application To Construct,Repair, Renovate Or Demolish a One-or Two-Family Dwelling rhis Section For Official Uv Only Building Permit Number: Dale Ap ied: C /P Building Official(Print Name) Signature Date SECTION 1:SITE INFORMATION 1.1 Property Address: __ ^^ 1.2 Assessors Map&Parcel Numbers C7 oaI Q1 rJC. 11� L I a Is(his an accepted street?yes x nU Map Number Parcel Number 1.3 Zoning Information:" 1.4 Property Dimensions: Zoning District Proposed Use Lot Area(sq fl) Frontage(ft) 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: —7CA I e M M�. Wayne Silva Name(Print) City,State,ZIP 20 Barnes Circle 978-884-6698 Wayno6698@yahoo.com No.and Street Telephone Email Address SECTION 3:DESCRIPTION OF PROPOSED WORK'(check all that apply) New Construction 1)( Existing Building❑ Owner-Occupied ❑ 1 Repairs(,) ❑ 1 Alt cration(s) ❑ 1 Addition ❑ Demolition ❑ 1 Accessory Bldg.❑ 1 Number of lJnits_ Other ❑ specify: Brief Description of Proposed Work 2: V LLIG Sol0.r SECTION 4:ESTIMATED CONSTRUCTION COSTS Item Estimated Costs: Official Use Only Labor and Materials 1.Building $ ILI 00 1. Building Permit Fee:$ Indicate how fee is determined: 2.Electrical $ ❑Standard City/Town Application Fee ❑Total Project Cost'(Item 6)x multipliery�x 3.Plumbing $ L Other Fees: $ / /Z 4.Mechanical (HVAC) $ List: 5.Mechanical (Fire Suppression) $ Total All Fees:$ (,�.r-y� Check No. Check Amount: Cash Amount:_ 6.Total Project Cost: $`3JICOD 00 ❑Paid in Full ❑Outstanding Balance Due: FI(j alto r SECTION 5: CONSTRUCTION SERVICES 5.1 Construction Supervisor License(CSL) © 2,5 4 S 2g 1 me—s �V\2a Y�QVI License Number ExpinitionDate Name of CSL Holder c� 1 katy) Sly�C^^L List CSt. I ype(see below) U NNo.and Street 1 Type Description SC LA-S , �"lA I A a9 O Lo U Unrestricted(Buildings up to 35,000 cu.ft. City/To R Restricted 1&2 FamilyDwellin wn,S' ZIP M Mason RC Roofin Coverin WS Window and Tiding 'lal-6 ,)Z nn ntaro Vlyt' —'__ I Insulation tionFue Burning Appliances •tr yt)0,ta I htsulation Tele hone Email address r`'1 D Demolition 5.2 Registered Home Improvement Contractor(HIC) \Cgnr 6� SO lQr 4 nt Name �p� �'�"C-' HIC Registration Number E pirat ni Date 4q3 Pad)Nat 6 HOIC, Rggistram Name W YVkG1S0IGL'chi V l V ln-FS0V_ . No.and Street Entail address C_DVv1 Pr ovo L11- $t}IOOL} -1_$13053o1p5 City/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..........A No...........❑ SECTION 7a:OWNER AUTHORIZATION TO BE COMPLETED WHEN OWNER'S AGENT OR CONTRACTOR APPLIES FOR BUILDING PERMIT I,as Owner of the subject property,hereby authorize 1/11/1✓SV So ICL.V' to act on my behalf,in all matters re ativ to work authorized by this building permit application. 8/14/14 Pont 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 perjury that all of the information contained in III p1 lion is true and accurate to the best of my knowledge and understanding. l,( VIVIInt ate' q 'H-� I Print Ow s rr rued Agent'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 fund under M.G.L.c. 142A.Other important information on the HIC Program can be found at www.mass og v/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.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 'I'ype 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" Movint. solar 4931 North 300 West Structural Group Provo,UT84604 P: (801)234-7050 Scott E. Wyssling, PE Head of Structural Engineering Scott.wyssfing@vivintsolar.com August 11,2014 Revised September 4, 2014 Mr. Dan Rock, Project Manager Vivint Solar 24 Normac Road Woburn MA 01801 Re: Structural Engineering Services Silva Residence 20 Barnes Circle, Salem MA AR#3207099 7 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 10 dimensional lumber at 16" on center with 2 x 4 collar ties every 32". 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 25 degree roof slopes on the dwelling areas. Ground snow load is 40 PSF for Exposure"B", Zone 2 per(ASCE/SEI 7-10). 2. Total area subject to wind uplift is calculated for the Interior, Edge and Corner Zones of the dwelling. vivant. soIar Page 2 of 2 B. Loading Criteria • 10 PSF= Dead Load roofing/framing 40 PSF= Live Load(ground 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 Ibslinch 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 %" with a minimum size of 5116" 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, �ZNOF �cy� -P� civilScott E.Wyssl PE 0150 MA License N . 50 9pF Fc sTEPe FSSIONAA. vivint. solar U C w Z I (D E s -Z n/mv PV SYSTEM SIZE. 28)Trina Solar TSM-250 PA05.16 MODULES WITH A , ammo Enohase M21 S60-21-L-S2x-ZC MICRO-INVERTER 7 kW DC MOUNTED ON THE BACK OF EACH MODULE I '^ vJ 5 I , I 1 1 ai Q I I •O m JUNCTION BOX ATTACHED TO I ry ARRAY USING ECO HARDWARE TO I KEEP JUNCTION BOX OFF ROOF 5' 1'PVC CONDUIT N ¢ O G I FROM JUNCTION BOX TO ELEC PANEL m Z ZV INTERCONNECTION POINT, >rc K H ANSIMLOCKABLE LOCA ION, SWITCH, w w z m ANSI METER LOCATION, < < J 3 8 UTILITY METER LOCATION z z Q ¢ I � o SHEET --- --- ------�- - ----- - - -- -� NAME: w Q _1 a 20 Barnes Cir, Salem MA 01970 SHEET NUMBER: PV SYSTEM SITE PLAN o SCALE: 3/32"= 1'-0" > 1 0 00 yD� y N3(n mm sm u2 �� m00 v0 � u> m y T O �A OT \\momm �A a m CC y m rn # v c is m z m m z y N U) D � v m � .. -< O A 2 O W Cn � � T Ny m O 0 n r D Z �= DS NSTALLER VIVINTSOLAR t Silva Residence m ROOF m m INSTALLER NUMBER:1.877.4044129 `M�''`�1,�� ry� {�+y [y�y` Y PV Z,Q m� MA LICENSE:MAHIC 170848 V Y V IU U • J\ / . � ' 20 Bames Cir p PLAN ORAWNBY:BRG AR3207099 asi Madifietl 8H42014 UTILITY ACCOUNT NUMBER.88131- 7001