HomeMy WebLinkAboutTaylor Ortiz STR R1 5000 Gateway Dr. Ste 105
Medina, OH, 44256
330-419-2520
www.SynEngServices.com
ajsniff@synengservices.com
Client: YellowLite, 1925 St. Clair Ave NE, Cleveland, OH 44114
Subject: Structural Roof Evaluation
To Whom It May Concern:
We have reviewed the documents provided by Yellowlite relating to the installation of the solar
array at the above- referenced site. Based upon our review, it is our conclusion that the installation
of the solar array on this existing roof will not adversely affect this structure. It is our
understanding that the structural components of the existing roof framing are in good condition
and free of damage. The design of the solar panel racking (mounts, rails, etc.) and attachment is
by the manufacturer or contractor. Please note a representative of Synergy Engineering has not
physically observed the roof framing.
Design Parameters
Conclusions
Code: Indiana Residential Building Code,
Risk Category: II
Design wind speed: 115 mph (3-sec gust) per ASCE 7-10 W ind exposure category: C
Ground snow load: 20 psf
Our conclusion regarding the adequacy of the existing roof is based on the fact that the additional
weight of the solar array and attachment hardware is 4 psf or less. In the area of the solar array ,
other live loads will not be present or will be greatly reduced. Evaluation of expected loads and
stress increase of the wood framing was made and shows sufficient reserve capacity in the roof
framing members. Regarding snow loads, because the panels are slippery and unobstructed,
effective snow loads will be reduced in the area of the solar array . The gravity loads in the area of
the solar array are decreased; thus, the stresses of the structural elements are decreased. Based on
these items, the proposed solar array is structurally acceptable to install per the areas
shown in the
Regarding lateral loads, the solar array will be flush-mounted (no more than 6" above the roof
surface) and parallel to the roof surface. Thus, we conclude that any additional wind loading on
the structure related to the addition of the proposed solar array is negligible. The connections to
the existing roof shall be spaced at 48" maximum. Thus the existing structure is permitted to
remain unaltered.
Project Address: 3837 Penzance Place Carmel, IN 46032
following layout drawing.
November 5 , 2020
12/17/20
5000 Gateway Dr. Ste 105
Medina, OH, 44256
330-419-2520
www.SynEngServices.com
ajsniff@synengservices.com
Limitations
Installation of the solar panels must be performed in accordance with manufacturer
recommendations. All work performed must be in accordance with accepted industry-wide
methods and applicable safety standards. The contractor shall notify Synergy Engineering
Services, LLC should any damage, deterioration or discrepancies between the as-built condition
of the structure and the condition described in this letter be found. Particular attention must be
paid to the maximum allowable spacing of connections and the location of solar panels relative to
roof edges. Connections to existing roof framing must be staggered, except at array ends, so as
not to overload any existing structural member. The use of solar panel support span tables
provided by others is allowed only where the building type, site conditions, site-specific design
parameters, and solar panel configuration match the description of the span tables. Electrical
engineering is the responsibility of others. Waterproofing around the roof penetrations is the
responsibility of others. Synergy Engineering Services, LLC assumes no responsibility for
improper installation of the solar array. Synergy Engineering Services, LLC assumes no
responsibility for the effects of snow falling from roofs onto other roofs, property or persons due
to the installation of the solar array.
Very truly yours,
Synergy Engineering Services
Adam J. Sniff, P.E.
Consulting Engineer
12/17/20
5000 Gateway Dr. Ste 105
Medina, OH, 44256
330-419-2520
www.SynEngServices.com
ajsniff@synengservices.com
Figure 1. Layout of Array
1925 St. Clair Ave NE
Cleveland, Ohio 44114
Phone: 216-333-1364
www.yellowlite.com
Customer Signature
PV Layout
11.2 kW Solar Photovoltaic
Project: 1050 – AR
Silfab
SIL-320NL
66.9 x 39.3 x 1.5 in
Anastasia Rowland-Seymour
15015 Onaway Rd
Shaker Heights, OH 44120
PH: (315) 657-6162
System Details:
· Residential 11.2kW grid tied (photovoltaic) system
· This system has been designed in accordance with all current and applicable
NEC, OBC, and RCO codes
· Height of the Array: 3-4in above the roof, parallel to the roof
· Weight of the Array: Less than 4lbs/ft^2
· Total Area of Array: 5.6ft x 3.3ft x 35 = 647 sq. ft.
· Weight of the Array on Roof: 41.8lbs x 35 = 1463 lbs
· Stress of Array on entire roof : 1463 lbs./647 sq.ft.= 2.26 lbs/sq. ft.
· No fencing or trenching would be needed with this project
SYSTEM: 35 x Silfab SIL-320 NL @ 320W – 11.2kW • AZIMUTH: R1: 286º, R2: 196º, R3: 106º • PITCH: R1,R2,R3: 37º
Legend
Utility Meter &
AC Disconnect
N
S
EW
Inspection Notes for Crew
2
1
3
33'
2
3'
24'
14' 5"
24' 23 '29'2
3'29'23'
Roof 1: West
06 x Modules
Roof 3: East
06 x Modules
Roof 2: South
23 x Modules
36"
36"
18"
18"36"18" 18" 18"18"12/17/20