12 PRESTON RD - BUILDING INSPECTION (2) z q S c<< y
The Commonwealth of Massachusetts
OF
Board of Building Regulations and Standards CITY SALEM
Massachusetts State Building Code, 780 CMR dMar
Revised Mar 2011
Building Permit Application To Construct, Repair, Renovate Or Demolish a
^n One- or Two-Family Dwelling
t„ This Section For Official Use Only
Building Permit Number: Date A pKied:
Building Official(Print Name) Signature �Da e r^te r^t
n11 SECTION 1: SITE INFORMATION
U —rTt
1.1 Property Address: 1.2 Assessors Map&Parcel Numbers w m
12 Pmeeha n and salemrn ma cf 19 1 <
m
1.la Is this an accepted street?yes no Map Number Parcel Number i cm)
1.3 Zoning Information: 1.4 Property Dimensions: "4
cn c�
m
Zoning District Proposed Use Lot Area(sq ft) Frontage(ft) cn
1.5 Building Setbacks(ft)
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? Municipal ❑ On site disposal system ❑
Check if yes❑
SECTION 2: PROPERTY OWNERSHIP'
2.1 Ownert of Record: ;y �i o AA Q 1 g 7
Name(Print) n l City,State,ZIP
)' s � � C�h Ill �1CiI(pb 3S3�qh
No.and Street Telephone Email Address
SECTION 3: DESCRIPTION OF PROPOSED WORK'(check all that apply)
New Constructiolfl Existing Building❑ Owner-Occupied ❑ Repairs(s) ❑ 1 Alteration(s) ❑ 1 Addition ❑
Demolition ❑ 1 Accessory Bldg. ❑ lNumber of Units Other ❑ Specify:
Brief Description o(Proposed Work':
nP/nni
SECTION 4: ESTIMATED CONSTRUCTION COSTS
Item Estimated Costs: Official Use Only
Labor and Materials
1. Building $ �u V 1. Building Permit Fee: $ Indicate how fee is
determined-0 Standard City/Town Application Fee
2. Electrical $ V ❑Total Project Cost'(Item 6)x multiplier x
3. Plumbing $ 2. Other Fees: $
4. Mechanical (HVAC) $ List:
5. Mechanical (Fire $
Suppression) Total All Fees: $
c 0 Check No. Check Amount: Cash
Amount-0 Paid in Full 0 Outstanding Balance Due:
SECTION 5: CONSTRUCTION SERVICES
5.1 Construction Su frvisor License(CSL) /),{I-1
(A Q � pf a License Number Exptrati�a 5a1e
Name of CSL Aolder b v
(' � List CSL Type(see below)
L� ' e `' 1 N\ J Type Description
No.and [reet
U Unrestricted(Buildings up to 35,000 cu. ft.
R Restricted 1&2 Family Dwelling
City/Town,State,7rP J M Masonry
RC Roofing Covering
WS Window and Siding
SF Solid Fuel Burning Appliances
i V I Insulation
T60phone Email address D Demolition
5.2 Registered Home Im m prroveeegit �o)ntractor(HIC) [Jd - '
'kINI� U%tU10-r HIC RleegiistrationNumber Expiration Date
HIC Company NarntNqr, Registrant tNa�m� i
No.and Stree l I'ki ^r ' '� Email address
II IV UI:�UI
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 Issuanc -of the building permit.
Signed Affidavit Attached? Yes ........x 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 N jaT 6 It-/V
to act on my behalf, in all matters relative tow k authorized by this building permit application.
Joseph adl�Ilario Aug 31 2015
Print Owner's Name(Electronic Signatu 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 this application is true andgura t tbc�best of my knowledge and understanding.
1Joseph adldlal>cn® „� Aug 31 , 2015
Print Owner's or Authorized Agent's Name lectro is 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
m .massseov/oca Information on the Construction Supervisor License can be found at www.mass.gov/dps
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"
+ Massachusetts - Department of Public Safety
Board of Building Regulations and Standards
i lmstructiun Supra isor
License: CS-108068 ,
KYLE GREENS
44 MAIN STREET d-F1 j
North Reading MA 0186411
J„ — —&—J'f4r— " ` Expiration
Commissioner 01/20/2018
axe ,
Office of Consumer Affairs d Business Regulation
10 Park Plaza - Suite 5170
Boston, Massachusetts 02116
Home Improvemerit Contractor Registration
:T Registration: 170848
_ Type: Supplement Card
Expiration: 1/5/2016
VIVINT SOLAR DEVELOPER LLC. ._I ,
KYLE GREENE i
3301 N THANKSGIVING WAY SUITET500
LEHI, UT 84043
Update Address and return card.Mark reason for change.
Y Address Renewal Employment Lost Card
iCAI G 20M-05111
1
The CoaaMoraiveallk of'Mgss'ackifsedds a
1 ,
I?epard,rceasd of Pradaesdr¢a7rgccca°eaads
ice Of Ixwestffgads®ens I
�— 1 CoNgpress Street, Suite 100
— , Bostooe, MA 02II4-2017
ww w..mass.®ov/dsa
NSrorkers' Connpeansadnon dasurance Affidavit: Bu dders/+Coretractors/Elecflricnans/Numbers
H�saRt 100matiou PWI.. Print Le�ib9v
Narne (Business/Organization/Individuai): Vivint Sour Developer, LLC
Address:3301 North Thanksgiving Way, Suite 500
C:itv/State;Zip: Lehi, UT 84043 Phone#: 801-377-9111
Ave you an employer? Check the appropriate box: Type off proyect(required):
4 f1 1 am a enteral cent actor and : I
r Mr,a ernpioyee wi h u g"` + 6. ❑New construction
employees (full and/or part-time)" have hired the sub-contractors i
2.❑ I am a sole proprietor or partner- listed on the attached sheet I 7. ❑ Remodeling
ship and have no employees These sub-contractors have t g_ ❑ Demolition
working for me in any capacity. employees and have workers' IIII
comp. insurance.t 1 Building addition
' [No workers' comp. insurance P
required.] 5. ❑ We are a corporation and its 10.❑ Electrical repairs or additions
3.❑ 1 am a homeowner doing all work officers have exercised their L13.
Plumbing repairs or additions
myself [No workers' comp. right of exemption per MGL Roof repairs
insurance required.] t c_ 1.52, §1(4),and we have no
employees. [No workers' Other Solar Installation
comp.insurance required.]
-Any applicant that checks box#I must also fill out the section below showing their workers'compensation policy information.
t Homeowners who submit this affidavit indicating they are doing all work and then hire outside contractors must submit a new affidavit indicating such.
IContractors that check this box must attached an additional sheet showing the name of the sub-contractors and state whether or not those entities have
employees. If the sub-contractors have employees,they must provide their workers'comp.policy number.
I out era ecwployer tFaat is providirea�tor iers°cos;-aperesa3aon wsaarisnce for trey errepP®gees. Below is she policy and job s&e
areJ®rmasioot.
Insurance Company Name: Zurich American Insurance Company
Policy#or Self-ins- Lic. #:WC 509601300 Expiration Date: 11/1/2015 77�5
Job Site Address: City/State/Zip: 01170
Attach a copy of na a workers' comapensadon policy declaration page(showing the ponew number and expiration date).
Failure to secure coverage as required under Section 25A of MGL c. [52 can lead to the imposition of criminal penalties of a
fine up to$1,500.00 and/or one-year imprisonment, as well as civil penalties in the form of a STOP WORK ORDER and a fine
of up to$250.00 a day against the violator. Be advised that a copy of this statement may be forwarded to the Office of
Investigations of the DIA for insurance coverage verification.
t do hereby cei*10y under the pains and penalties ofpe^jury that the infortcation provided above Is true and correct
Si.nature Date
Phone#: 801-2296459
'Dffecial use only. duo not write in this area,to be completed by city or iott'st official.
City or Town: Permit/License #
Issuing Authority(circle one):
1. Bcard of 1$ealth 2. Building Department 3. City/Town Clerk 4. Electrical Inspector S. Plumbing Inspector
b. Other
I
Contact Eerson:. P9nome#:
JM
A` CERTIFICATE OF LIABILITY INSURANCE 1n6�14°°n"YY'
THIS CERTIFICATE IS ISSUED AS A MATTER OF INFORMATION ONLY AND CONFERS NO RIGHTS UPON THE CERTIFICATE HOLDER THIS
CERTIFICATE DOES NOT AFFIRMATIVELY OR NEGATIVELY AMEND, EXTEND OR ALTER THE COVERAGE AFFORDED BY THE POLICIES
BELOW. THIS CERTIFICATE OF INSURANCE DOES NOT CONSTITUTE A CONTRACT BETWEEN THE ISSUING INSURER(S), AUTHORIZED
REPRESENTATIVE OR PRODUCER,AND THE CERTIFICATE HOLDER
IMPORTANT: If the certificate holder is an ADDITIONAL INSURED,the policy(ies) must be endorsed. If SUBROGATION IS WAIVED,subject to
the terms and conditions of the policy,certain policies may require an endorsement. A statement on this certificate does not confer rights to the
certificate holder in lieu of such endorsement(s).
PRODUCER CONTACT
MARSH USA INC. NAME:
122517TH STREET,SUITE 1300 PHONE FAX
No.
DENVER,CO 80202-5534 AODMLSS:
Attn:Denver.certrequest@marsh.com,Fa;:212,948.4381
INSURER(S)AFFORDING COVERAGE NAIC#
462738-STND-GAWUE-14-15 INSURER A:Evanston Insurance Company 35378
INSURED INSURER B:Zurich American Insurance Company 16535
Vivint Solar,Inc:
Vivint Solar Developer LLC INSURER C;American Zurich Insurance Company 40142
3301 North Thanksgiving Way INSURER D:
Suite 500
Lehi,UT 84043 INSURER E:
INSURER F:
COVERAGES CERTIFICATE NUMBER: SEA-002368030-08 REVISION NUMBER:0
THIS IS TO CERTIFY THAT THE POLICIES OF INSURANCE LISTED BELOW HAVE BEEN ISSUED TO THE INSURED NAMED ABOVE FOR THE POLICY PERIOD
INDICATED. NOTWITHSTANDING ANY REQUIREMENT, TERM OR CONDITION OF ANY CONTRACT OR OTHER DOCUMENT WITH RESPECT TO WHICH THIS
CERTIFICATE MAY BE ISSUED OR MAY PERTAIN, THE INSURANCE AFFORDED BY THE POUCIES DESCRIBED HEREIN IS SUBJECT TO ALL THE TERMS,
EXCLUSIONS AND CONDITIONS OF SUCH POLICIES.LIMITS SHOWN MAY HAVE BEEN REDUCED BY PAID CLAIMS.
INSR ADDLTYPE OF INSURANCE laa D POOL.NUMBER MWDD LICY ER E%P
LTR MWDD LIMITS
A GENERAL LU191LITY 14PKGWE00274 11/0112014 11/01/2015 EACH OCCURRENCE $ 1,000,000
X COMMERCIAL GENERAL LIABILITY PREMISES EaEacwnence S 50,000
CLAIMS-MADE MOCCUR MED EXP(Any one person) $ 5,000
X $5,000 Ded.BI&PD PERSONAL&ADV INJURY $ 1,000,000
GENERAL AGGREGATE s 2,000,000
GEN'L AGGREGATELIMIT APPLIES PER: PRODUCTS-COMP/OPAGG $ 2,000,000
POLICY X PRO- LOC $
B AUTO MOBILE LMIBILITY RAP509601500 11/01/2014 11/01/2015 COMBINED SINGLE LIMIT 1,000,000
Ea accident
ANY AUTO BODILY INJURY(Par parson) $
ALL OWNED SCHEDULED BODILY INJURY(Per acddenU $
AUTOX
XH REDSAUTOS X UTOG
NON-OMED PROPERTY DAMAGE $
AUTOS SPer acrldem
A UMBRELLA LIAB X OCCUR 14EFXWE00088 111012014 11N1/2015 EACH OCCURRENCE S 5,000,000
X EXCESS LIAR CLAIMS-MADE AGGREGATE $ 5,000,000
DIED j I RETEMION 8 $
G WORIUMS COMPENSATION WC509WI300 11/012014 11101/2015 X 1 WC STATU- OTH-
AND EMPLOYERS'UUMMUTY
B ANY PROPRIETORIPARTNEWEXECUTIVIE V1N WC509601400 11/012014 11/01201$ PR E.L.EACH ACCIDENT $ 1,000,000
OFFICERIMEMBER EXCLUDED' HlA
(Mandatory in NH) E.L.DISEASE-EA EMPLOYEE S 1,000,000
If yes,describe under - 1,000,000
Or
OF OPERATIONS below E.L.DISEASE-POLICY LIMIT $
A Enors&Omissions8 14PKGWE00274 11/012014 11/012015 LIMIT 1,000,000
Contractors Pollution DEDUCTIBLE 5,000
DEWMMON OF OPERATIONS/LOCATIONS I VEHICLES (ABach ACORD 101,AddNignel Remarks Schedule,H more space is required)
The Certificate Holder and others as defined in the within agreement are included as additional insured where required by written contract with respect to General Uability.This insurance is primary end non-
contributory over any existing insurance and limited to liability arising out of the operations of the named insured and where required by written contract Waiver of subrogation is applicable where required by written
contract with respect to General Liability and Workers Compensation,
CERTIFICATE HOLDER CANCELLATION
City of Salem SHOULD ANY OF THE ABOVE DESCRIBED POLICIES BE CANCELLED BEFORE
93 Washington Sheet THE EXPIRATION DATE THEREOF, NOTICE WILL BE DELIVERED IN
Salem,MA 01970 ACCORDANCE WITH THE POLICY PROVISIONS.
AUTHORIZED REPRESENTATIVE
of Marsh USA Inc.
Kathleen M.ParsloeeA4llarac.Zl[- I244z�
01988-2010 ACORD CORPORATION. All rights reserved.
ACORD 25(2010105) The ACORD name and logo are registered marks of ACORD
WCONSULTING Wyssling Consulting
«.. . . 321 West Main Street
Boonton, NJ 07005
Scott E. Wyssling, PE, PP, CME office (973) 335-3500
cell(201) 874-3483
fax(973) 335-3535
swysslingr?a wysslingconsulting.com
May 27, 2014
Mr. Dan Rock, Project Manager
Vivint Solar
24 Normac Road
Woburn MA 01801
Re: Structural Engineering Services
Addario Residence
12 Preston Road, Salem MA
AR#3097147
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 Vivint Solar and will be
utilized for approval and construction of the proposed system.
3. Photovoltaic Rooftop Solar System Permit Submittal prepared by Vivint Solar 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 8
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 ZEP 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 33 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.
Page2of2
_
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 "ZEP Code Compliant
Installation Manual', which can be found on the ZEP website (zepsolar.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 1/2", 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 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.
n r
4. Panel supports connections shall be staggered to distribute load to adjacent afters.
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.
e'yOF
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Scott E. Wys PE
cwi y MA Licens
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Vivint Solar - PV Solar Rooftop System Permit Submittal
1. Project Information
Project Name: Joseph Addario
Project Address: 12 Preston Rd,Salem MA
A. System Description:
The array consists of a 7 kW DC roof-mounted Photovoltaic power system operating in parallel with the utility grid.There are (28)250-
watt modules and (28)215-watt micro-inverters,mounted on the back of each PV module.The array includes (2) PV circuit(s).The array
is mounted to the roof using the engineered racking solution from 6cp Solar.
B.Site Design Temperature: (From Boston Logan INTL ARPT weather station)
Average low temperature: -21.1 °C (-5.98 OF)
Average high temperature: 38.4°C (101.12 OF)
C. Minimum Design Loads:
Ground Snow Load: 40 psf (State Board BR&S)
Design Wind Speed: 100 mph (State Board BR&S)
2. Structural Review of PV Array Mounting System:
A.System Description:
1.Roof type: Comp. Shingle
2. Method and type of weatherproofing roof penetrations: Flashing
B. Mounting System Information:
1.Mounting system is an engineered product designed to mount PV modules
2. For manufactured mounting systems, following information applies:
a.Mounting System Manufacturer: Zep Solar
b. Product Name: ZS Comp
c.Total Weight of PV Modules and mounting hardware: 1204 Ibs
d.Total number of attachment points: 41
c.Weight per attachment point: 29.36 Ibs/square foot
f.Maximum spacing between attachment points: * See attached engineering talcs
g.Total surface area of PV array: 493.08 square feet
h.Array pounds per square foot: 2.44 Ibs/square foot
i.Distributed weight of PV array on roof sections:
-Roof section 1: (28)modules,(41)attachments 29.36 pounds per square foot
vivin4. solar
3. Electrical Components:
A. Module (UL 1703 Listed) Qty
Trina TSM 250-PA05.18 28 modules
Module Specs
Pmax- nominal maximum power at STC - 250 watts
Vmp- rated voltage at maximum power - 30.3 volts
Voc-rated open-circuit voltage - 37.6 volts
Imp-rated current at maximum power - 8.27 amps
Ise-rate short circuit current - 8.85 amps
B. Inverter (UL 1741 listed) Qty
Gnphasc M215-60-2LI.S22 28 inverters
Inverter Specs
1. Input Data (DC in)
Recommended input power(DC) - 260 watts
Max.input DC Voltage - 45 volts
Peak power tracking voltage - 22V-36V
Min./Max. start voltage - 22V/45V
Max.DC short circuit current - 15 amps
Max. input current - 10.5 amps
2. Output Data (AC Out)
Max. output power - 215 watts
Nominal output current - 0.9 amps
Nominal voltage - 240 volts
Max. units per PV circuit - 17 micro-inverters
Max. OCPD rating - 20 amp circuit breaker
C.System Configuration
Number of PV circuits 2
PV circuit 1 - 14 modules/inverters (20) amp breaker
PV circuit 2 - 14 modules/inverters (20) amp breaker
vivin . solar
D. Electrical Calculations
1. PV Circuit current
PV circuit nominal current 12.6 amps
Continuous current adjustment factor 125% 2011 NEC Article 705.60(B)
PV circuit continuous current rating 15.75 amps
2. Overcurrent protection device rating
PV circuit continuous current rating 15.75 amps
Next standard size fuse/breaker to protect conductors 20 amp breaker
Use 20 amp AC rated fuse or breaker
3.Conductor conditions of use adjustment(conductor ampacity derate)
a.Temperature adder
Average high temperature 38.4°C (101.12°F)
Conduit is installed 1"above the roof surface Add 22°C to ambient 2011 NEC1'able 310.15(B)(3)(0)
Adjusted maximum ambient temperature 60.4°C (140.72°F)
b.PV Circuit current adjustment for new ambient temperature
Derate factor for 60.4°C (140.72-F) 710% 2011 NEC Table 310A5(B)(2)(a)
Adjusted PV circuit continuous current 22.1 amps
c. PV Circuit current adjustment for conduit fill
Number of current-carrying conductors 6 conductors
Conduit fill dcrate factor 80% 2011 NEC Table 310.15(3)(3)(a)
Final Adjusted PV circuit continuous current 27.7 amps
Total derated ampacity for PV circuit 27.7 amps
Conductors(tag2 on 1-line) must be rated for a minimum of 27.7 amps
1TIWN-2 (90°C) #12AWG conductor is rated for 30 amps (Use#12AWG or larger) 2011 NECPable 310.15(B)(16)
4.Voltage drop(keep below 3%total)
2 parts:
1.Voltage drop across longest PV circuit micro-inverters (from modules to j-box)
2. Voltage drop across AC conductors (from j-box to point of interconnection)
1.Mirco-inverter voltage drop: 0.48%
The largest number of micro-im-crtcrs in a row in the entire array is 10 inCircuit 1. According to
manufacturer's specifications this equals a voltage drop of 0.48%.
2. AC conductor voltage drop:
= I x R x D (=240 x 100 to convert to percent)
_ (Nominal current of largest circuit)x (Resistance of#12AWG copper) x(fotal wire run)
_ (Circuit 1 nominal current is 12.6 amps) x (0.0020162) x (130) -r (240 volts) x (100) 1.37%
Total system voltage drop: 1.85%
vivi t. solar
5/23/2014 3097147-Zepulator
ZepSolar
Engineering Calculations
3097147
Project Designer
Name:Ryan Salmon City,State,Zip:84604
Email:rsalmon@vivintsolar.com Country:United States
Phone:
Customer Information
Name: Street Address:12 Preston Rd
Email: City,State,Zip:Salem, Massachusetts 01970
Phone: Country:United States
System Details
Module Manufacturer Trina Solar Mounting System Zap Solar
PV Module TSM-250-PA05.18 Manufacturer
Quantity of PV Modules 28 Mounting System Type ZS Comp
Array Size (kW) 7.000 Roof type Composition Shingle
Attachment Type Comp Mount,Type C
Module-level Enphase Energy-M215-Z
electronics
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5r"2014 3097147-Zepulator
Engineering Calculations
Design Variables Excel/CSV (/projects/62840/summary/engineering_design_variables_csv.csv)
Description (Symbol) Value Unit
Module Orientation Landscape T
Module Weight 44.8 Ibs
Average Roof Height(h) 30.0 It
Least Horizontal Dimension(Ihd) 30.0 It
Edge and Corner Dimension"a" 3.0 ft
Roof Slope(0) 33.0 deg
Rafter/Truss spacing 16.0 in
Rafter/Truss dimension Min. nominal framing member depth of 4"
Basic Wind Speed(V) 110 mph
6ryosure Category B
Ground Snow Load(Py) 40 psf
Risk Category II
Topographic Factor(Kt) 1.0
Thermal Factor for Snow Load(Ct) 1.2
Exposure Factor for Snow Load(Ce) 0.9
Effective Wind Area 10 ftz
Snow Load Calculations (Using calculation procedure of ASCE 7-10 Chapter 7) Excel/CSV
(/projects/62840/summary/e ngi neeri ng_s now_load_calculations_csv.csv)
Description(Symbol) Interior Edge Corner Unit
Flat Roof Snow Load(Pf) 30.2 30.2 30.2 psf
Slope Factor(Cs) 0.7 0.7 0.7
Roof Snow Load 20.3 20.3 20.3 psf
Wind Pressure Calculations (Using simplified procedure of ASCE 7-10 Chapter 27) Excel/CSV
(/projects/62840/s umma ry/e ngi nee ring_wind_pressure_calculations_csv.csv)
Description (Symbol) Interior Edge Corner Unit
Net Design Wind Pressure uplift(Pnet30_up) -21.8 -25.5 -25.5 psf
Net Design Wind Pressure downforce(Pnet30 down) 19.9 19.9 19.9 Psf
Adjustment Factor for Height and Exposure Category(A) 1.0 1.0 1.0
Design Wind Pressure uplift(Wup) -21.8 -25.5 -25.5 psf
Design Wind Pressure downforce(Wdown) 19.9 19.9 19.9 psf
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ASD Load Combinations (Using calculation procedure of ASCE 7-10 Section 2.4) Excel/CSV
(/projects/62840/s ummary/e ngi nee ring_load_combinations_csv.csv)
Description (Symbol) _ Interior Edge Corner Unit
Dead Load(D) 2.5 2.5 2.5 psf
Snow Load(S) 17.1 17.1 17.1 psf
Load Combination 1 (D+0.75'(0.6'W1own)+0.75'S) 21.8 21.8 21.8 psf
Load Combination 2(D+0.6'Wd.wn) 14.1 14.1 14.1 psf
Load Combination 3(D+S) 16.4 16.4 16.4 psf
Uplift Design Load(0.6'D+0.6'Wup) -11.8 -14.0 -14.0 psf
Mapmum Absolute Design Load(PabO 21.8 21.8 21.8 psf
Spacing Calculations Excel/CSV
(/projects/62840/s ummary/e ngi nee ring_spacing_calculations_csv.csv)
Description (Symbol) Interior Edge Corner Unit
Max allowable spacing between attachments �T 72.0 72.0 72.0 in
User selected spacing between attachments given a rafter/truss spacing of 16.0 in 64.0 64.0 64.0 in
Max cantilever from attachments to perimeter of PV array 24.0 24.0 24.0 in
Distributed and Point Load Calculations (In conformance with Solar ABC's Expedited Permit Process
for PV System (EPP)) Excel/CSV
(/projects/62840/s umma ry/e ngi nee ring_distributed_a nd_poi nt_load_calculations_csv.csv)
Description (Symbol) Value Unit
Weight of Modules 1254.4 T Ibs
Weight of Mounting System 95.33 _ Ibs
Total System Weight 1349.73 Ibs
Total Array Area--_ ---� 493.17 _-- � ftz
Distributed Weight 2.74 psf
Total Number of Attachments 41
Weight per Attachment Point 32.92 psf
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