30 CLOVERDALE AVE - BUILDING PERMIT APP CKI
The Commonwealth of Massachusetts �,
iNSPECTIONkL Sr R'IJCCB'OF
Board of Building Regulations and Standards
Massachusetts State Building Code, 780 C SALEM
\�J IS �EP �q A I�eIW6d Mar 2011
n / Building Permit Application To Construct, Repair, Renovate Or emo ish a 44
One-or Two-Family Dwelling
This Section For Official e Only
Building Permit Number: Date At/plied:
lo
Building Official(Print Name) Signature Date
SECTION 1:SITE INFORMATION
1.1 Property Address: 1.2 Assessors Map& Parcel Numbers
1.1 a Is this an accepted street?yes no Map Number Parcel Number
1.3 Zoning Information: 1.4 Property Dimensions:
Zoning District Proposed User - Lot Area(sq ft) Frontage(ft)
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 ifyes❑
SECTION 2: PROPERTY OWNERSHIP'
2.1 Owner'of Record: ,,, �A � � I Qh U t ,af ���71D
m�//� r /� (_yI/� ,(� 9��J�. �,'(n �Sstatteee k °—`�/,'/_/ /(J
No�rd'Stree Telephone V I -Email Address
SECTION 3: DESCRIPTION OF PROPOSED WORK2(check all that apply)
New Constructio Existing Building❑ Owner-Occupied ❑ Repairs(s) ❑ 1 Alteration(s) ❑ Addition ❑
Demolition ❑ 1 Accessory Bldg.❑ Number of Units Other ❑ Specify:
Brief escription of Proposed Work:
SECTION 4:ESTIMATED CONSTRUCTION COSTS
Item Estimated Costs: Official Use Only
Labor and Materials
1. Building $ d 1. Building Permit Fee: $ Indicate how fee is determined:
2.Electrical $ ❑Standard City/Town Application Fee
❑Total Project Cost (Item 6)x multiplier x \
3. Plumbing $ 2. Other Fees: $ [//+ .U\►
4.Mechanical (HVAC) $ List:
5. Mechanical (Fire $
Suppression) Total All Fees:$
C Check No. - Check Amount: Cash Amount:
6.Total Project Cost: $ 6 0 Paid in Full 0 Outstanding Balance Due:
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wovi ll II t10 solar , 3301 North Thanksgiving Way, Suite 500
Structural Group Lehi, UT 84043
P: (801) 234-7050
Scott E. Wyssling, PE
Senior Manager of Engineering - scott.wyssfing@vivintsolar.com
August 12, 2015
Mr. Dan Rock, Project Manager
Vivint Solar
3301 North Thanksgiving Way, Suite 500
Lehi, UT 84043
Re: Structural Engineering Services
Meimeteas Residence
30 Cloverdale Ave, Salem MA
S-4504694
9.36 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 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 Sections (1, 2, and 3): Roof section is composed of 2x10 dimensional lumber at 16" on center
with 2x4 collar ties every 16". 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. The existing roofing material consists of composite shingle. 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 37
and 18 degree roof slopes on the dwelling areas. Ground snow load is 40 PSF for Exposure B,
Zone 2 per(ASCE/SEI 7-10).
vivint. solar
Page 2 of 2
2. Total area subject to wind uplift is calculated for the Interior, Edge and Corner Zones of the
dwelling.
B. Loading Criteria
10 PSF = Dead Load (roofing/framing) 40 PSF = Live 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. Analysis performed of 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. 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 or deflect non-uniformly,
our office should be notified before proceeding with the installation.
2. The solar panels are 1 ''/2" thick and mounted 4 '/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 Nation
Design Standards (NDS) of timber construction specifications for Spruce-Pine-Fir assumed. Based
on our evaluation, the pullout value, utilizing a penetration depth of 2 '/2", is less than the maximum
allowable per connection and therefore is adequate.
4. Roof Sections (1, 2, and 3): 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, 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.
V truly yours, OF
`P� s
s��
AIL
Scott E. Wyssli PE No 507
MA License No. 505 q90,, 9FG/STE �aF�
FSS/ONAL ENG
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=N zw INSTALLER VIVI ,,- AR M1` 11c1■,' Meimeteas Residence
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m ROOF m m INSTALLER NUMBER:1.67].604.4129 ��"�Y Y Y I 30 Cloverdale Ave
PV 2,Q S MA LICENSE:MANIC I]0846 v u. Salem.MA 01970
PLAN DRAWN BY:RBR AR 4504694 Lasi Mo lifed 7/292015 UTILITY ACCOUNT NUMBER:50717- 5006
EcolibriumSolar
Layout
r
r
Skirt
e Coupling Note: If the total width of a continuous array exceeds 35 ft, break array to allow for thermal
expansion and contraction. See Installation Guide for details.
O Clamp Warning: PV Modules may need to be shifted with respect to roof trusses to comply with
0 Bonding Jumper maximum allowable overhang.
_ EcolibriumSolar
Layout
Skirt
e Coupling Note: If the total width of a continuous array exceeds 35 ft, break array to allow for thermal
expansion and contraction. See Installation Guide for details.
O Clamp Warning: PV Modules may need to be shifted with respect to roof trusses to comply with
0 Bonding Jumper maximum allowable overhang.