28 HANCOCK ST - BUILDING INSPECTION cl '
( � Cr S(o2�
The Commonwealth of Massachusetts
4 Board of Building Regulations and Standards CITY OF
[` \ � Massachusetts State Building Code,780 CMR SALEM
N Revised Mar 2011
Building Permit Application To Construct,Repair,Renovate Or Demolish a
(� One-or Two-Family Dwelling
This Section For Official Use Only
( Building Permit Number: Date Applied:
Building Official(Print Name) Signature Date
SECTION 1:SITE INFORMATION
1_ 1 -P op rty Ad r s• - 1.2 Assessors Map&Parcel Numbers
I` •L��a�jc� S7
I.Ia 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 ft) Frontage(it)
14_Building Setbacks(ft)
Front Yard Side Yards Rear Yard
Required Provided Required Provided Required J 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? Municipal❑ On site disposal system ❑
Check if yesO
SECTION 2: PROPERTY OWNERSHIP' - - -
2.1 ownl§'rise YEspinal Salem MA 01979
Name(Print) City,State,ZIP
28 hancock st 9787895785 Brispsn35@yahoo.com
No.and Street Telephone Email Address
SECTION 3:DESCRIPTION OF PROPOSED WORK'(check all that apply)
New Constructi Existing Building❑ Owner-Occupied ❑ Repairs(s) ❑ 1 Alteration(s) ❑ 1 Addition ❑
Demolition ❑ 1 Accessory Bldg.❑ Number of Units_ Other ❑ Specify: .
Brief� ription of Proposed Work'': malkARA
SO : ( . O 1
_SECTION 4:ESTIMATED CONSTRUCTION COSTS
Item Estimated Costs: Official Use Only
Labor and Materials
1.Building $7�3 9 jp • 4 1. Building Permit Fee:$ Indicate how fee is determined:
2.Electrical $ S 9S ❑Standard City/Town Application Fee
❑Total Project Cost'(Item 6)x multiplier x
3.Plumbing $ 2. Other Fees: $
4.Mechanical (HVAC) $ List:-
S.Mechanical (Fire $
-Suppression) Total All Fees:$
iC 1 ��� ,� Check No. Check Amount: Cash Amount:_
6.Total Project Cost: $ t 0 Paid in Full ❑Outstanding Balance Due:
SECTION5: CONSTRUCTION SERVICES ua�
S.L�11 Cotruc/i`onSu ^ i or License(CSL) I o9ou&kf � le— License Number EplmGon Da
te
N ck.
Udder
Il List CSL Type(see below)
No. {gtre t ' • ^ Type Description
I ; ��}no 1 IV..LV. 6`���I U Unrestricted(Buildingsu to 35.000 cu.ft.)
Cit I�`1 tak, 1fi 11VV VV 11 `t R Restricted 1&2 FamilyDwelling
M Masonry
RC Roofing Covering
WS .Window and Siding
SF- Solid Fuel Burning Appliances
I Insulation
Telephone - 4 Email address D Demolition _._..
5.2 Registered Home
�Improvement Contractor(HIC) '�/t
-I ` "�^-r� HIC Registration Number Expiration Date
HIC Company Nan r iC rstrant Nem
Gt1 ,u -F kL11Q GItPEYts2C�yiVIOZI t 1014
No.and Street a �T °- Email address
Ci /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..........M' 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 )AVM. c,01;•k0
to act on my behalf,in all matters relative to work authorized by'this building permit application.
Briselda Espinal 9/10/16
Print Owner's Name(Electronic Signature) Date
SECTION 7b:OW NEW 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 this application is true and accurate to the best of my knowledge and understanding.
Print O�er's or Authorized Agent' Name(Electronic Signature)
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
im mass gov ora Information on the Construction Supervisor License can be found at wvyw.mass. og v/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
Type of heating system Number of decks/porches
Type of cooling system Enclosed Open.
3. "Total Project Square Footage"maybe substituted for"Total Project Cost"
o�T wl Iltu solar 1800 W Ashton Blvd.
Structural Group Lehi, UT 84043
Jon P. Ward, SE, PE Clint C. Karren, PE
Structural Engineering Manager Structural Engineering Manager
ion.ward@vivintsolar.com clint.karren@vivintsolar.com
November 10, 2016
Mr. Dan Rock, Project Manager.
Vivint Solar
1800 W Ashton Blvd.
Lehi, UT 84043
Re: Structural Engineering Services
Espinal Residence
28 Hancock St, Salem, MA
S-5251644; MA-01
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 representative from our office under my supervision
identifying specific site information including size and spacing of members 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 the following:
• Roof section is composed of assumed 2x6 dimensional lumber at 16" on center and a single layer
of roofing. The attic space is finished and photos indicate that there was no access to visually
inspect the size and condition of the roof members.
All wood material utilized for the roof system is assumed to be Spruce-Pine-Fir #2 or better with standard
construction components. The existing roofing material consists of composite shingle.
Stability Evaluation:
A. Wind Uplift Loading
1. Calculations for uplift are based on ASCE/SEI 7-10 Minimum Design Loads for Buildings and other
Structures, a wind speed of 100 mph based on Exposure Category B and 40 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.
Page fol2 vivint. solar
B. Loading Criteria
10 PSF= Dead Load (roofing/framing) 40 PSF=Ground Snow Load
3 PSF = Dead Load (solar panels/mounting hardware)
Total Dead Load= 13 PSF
The above values are within acceptable limits of recognized industry standards for similar structures and in
accordance with the 2009 International Residential Code with Massachusetts Amendments. Analysis performed on
the existing roof structure utilizing the above loading criteria indicates that the existing members 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 (www.ecolibriumsolar.com). If during
solar panel installation, the roof framing members appear unstable or deflect non-uniformly, our
office should be notified before proceeding with the installation.
2. The solar panels are 1 1/2" thick and mounted 4 1/2" off the roof for a total height off the existing roof
of 6". At no time will the panels be mounted higher than 6"above the existing plane of the roof.
3. Maximum allowable pullout per lag screw is 205 Ibs/inch of penetration as identified in the National
Design Specifications (NDS) of timber construction specifications for Spruce-Pine-Fir assumed.
Based on our evaluation, the pullout value, utilizing a penetration depth of 2 1/2", is less than the
maximum allowable per connection and therefore is adequate.
4. Considering the roof slopes, the size, spacing, condition of the roof, the panel supports shall be
placed at and attached no greater than every fourth roof member as panels are installed
perpendicular across members and no greater than the panel length when installed parallel to the
members (portrait). No panel supports spacing shall be greater than four (4) spaces or 64" o/c,
whichever is less.
5. Panel support connections shall be staggered to distribute load to adjacent members.
Based on the above evaluation, with appropriate panel anchors being utilized the roof system will adequately
support the additional loading imposed by the solar panels. This evaluation is in conformance with the 2009
International Residential Code with Massachusetts Amendments, current industry standards and practice, and the
information supplied to us at the time of this report.
Should you have any questions regarding the above or if you require further information do not hesitate to contact
me.
A44.
OF
Regards, $ ��
Jon P. Ward, SE, PE ARP c
MA License No. 52584 NO. 525
OISTEP�0\t�4i4i
0'9/0 AL
4,44
Page 2ot2 vivi t. solar
PV SYSTEM SIZE:
N 9.010 kW DC
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SCALE:118-=1'-0' d
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Photovoltaic System Conduit Conductor Schedule(ALL CONDUCTORS MUST BE COPPER
DC System Size 9010 Tag# Description Wire Gauge #of Conductors/Color Conduit Type Conduit Size
AC System Size 1 2600 1PVWire 30 AWG 2LV+,V-) N/A-Free Air N/A-Free Air
Total Motlule Coun[ 34 1 Bare Copper GrOund(EGC/GEC) 6AVVG 18ARE N/A-Free Air N/A-Free Air _ m y
2 THWN-2 1UAWG U2Vt,2V-)B/R PVC 1.1 l
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2 THWN-2-Ground 8AWG 1hGRN) PVC 1" - c o
3 THWN-2 8AWG 3(SL1,]12,1N)B/R/W PVC 1.1
3 TIU N-2-Ground 8AWG UGRN) PVC 1" ua1°i
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NEMA30R EQUIVALENT NEC 2014 Ex,"It,240V/125A J J
WITH TS'C service Panel,51n81e N w
TERMINATIONS Phase,wIM 100A Mai n e 2
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Conductor Calculations
PV Module Rating@ STC -Wire gauge calculated from NEC code 310.15(B)(i6)with ambient temperature calculations M
Module Make/Model 1KM265P from NEC 310.15(2)(a). 3iz on $
Max Power-Point Current(imp) 8.44 Amps For"On ROOF conductors we use the 90'C column ampacity,0.5"-3.S"off-the-roof temperature,
DC Safety Switch Max Power-Point Voltage(Vni 31.4 Volts adjustment from 310.15(6)(3)(c),and aceway fill adjustments from 310.15(B)(16), c c
Open-Circuit Voltage(Voc) 38 ts For"Dff Roof'conductors we use the]5'C column ampacity,or the 90'C columns m"city with
.6 Vol i u Rated for max operating condition of inverter the relevant ambient temperature and raceway fill adjustments,whichever is less.
NEC 690.35 compliant Short-Circuit Current(ISC) 9.03 Amps
The rating of the conductor after adjustments MUST be greater than,or equal to,the continuous
bpensall ungrounded conductors Max Series Fuse(OCPD) 15 Amps
duty uppinted output current.
Nom.Maximum Power at STf(Pmax) 265 Watts Calculation Example-Wire Rating(90'Qx Ambient Temperature Adjustment Conduit Fill �
Maximum System Voltage 1000VDQIEC) Adjustment>=Continuous Duty Output Current
Optimizer Solar Edge P300 Voc Temperature Coefficient -0.31 %/C (On Roof,Tag 2):10gaugewim atedfor40A, 40Ax0.76x0.8(4COnductom)=24,32>=18.75
DC Input Power 300 Watts (Off Roof,Tag 3):8 gauge wire rated for 50 A, 50>=39.58
DC Max Input Voltage 48 Volts (Off Roof,Tag 4):8 gauge wi in rated for SO A, 50>=39.58
L
DC Max Input Current 12.5 Amps AC Output Current According to NEC 690.8(8)(1) 31.6] Amps f6
DC Max Output Current 15 Amps Nominal AC Voltage 2, Volts 0
Max String Rating 525U Watts THIS PANEL IS FED BY MULTIPLE SOURCES(UTILITY AND SOLAR) to
Inverter Make/Model SE760)A-US
CEC Efficiency 92.5 % - C
AC Operating Voltage 240 Volts
Continuous Max Output Current 32 Amps ROOFTOP CONDUCTOR AMPACITIES DESIGNED IN COMPLIANCE \
DC Maximuminput Current 23 Amps WITH NEC690.9,TABLES 310.15(B)(2)(a),310.15(B)(3)(a),
Short Circuit Current 40 Amps 310.15(B)(3)(C),310.15(6)(I6),CHAPTER 9 TABLE 4,5,&9.
LOCATION SPECIFIC TEMPERATURE OBTAINED FROM ASH ME 2013
Max Output Fault Current 40 A 20ms DATA TABLES.
ASHRAE 2013-
Highest Monthly 2%DB Design Temp: Celsius.
Lowest Min.Mean Extreme DB: Celsius
OCPD Calculations
Breakers sized according to continuous duty output current.PV circuit nominal current based off
inverter continuous output current X(1.25(NEC code 210.19(A)(1)(d)). g0 .m.
Inverter SE7600 A-US-U Max Output=31.6]A x 1.25(NEC code 230.19(A)(1)(a)) z
=39.58 A<40 A(OCPD) o
system output current w/continuous duty=39,58<40A(System OCPD) p $
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Other Notes a
SHEET
•ALL INTERIOR RACEWAYS CARRYING DC CURRENT SHALL BE METALLIC NAME:
•All ampacity,calculations are made In compliance with NEC 220.5(B)
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SHADING CONSTRAINT
Offset Percentage 66.8
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