rafter letter Finger Lakes Engineering,PC
i tit 2536 State Route 21
Canandaigua,NY 14424
MORS: phone (585)396-3438
Anthony Yannotti, PE fax (585)394-386
Mr. Michael Prinzi March 27, 2019 ig e
Director of Project Management and Service Sheet 1 of 1 cn m q
Solar Liberty R1153 caw z 0
6500 Sheridan Drive Suite 120 oZ3
Buffalo,NY 14221 11 »— 0 2
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RE: Michael Hoffman, 27 Linden Avenue, Queensbury,NY 12804
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24
Dear Mike,
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Per your request we conducted a Preliminary Structural Condition Assessment that
included an on-site visit on 3/25/19, an observational examination of the existing roof
structure, and a review of any drawings, blueprints, or sketches that were available.
PV solar panels are proposed for the roof of this home as summarized below. The panels
are mounted on rails which are attached to the roof with an anchored deck base system
installed per manufacturer's specifications and recommendations.
I found that the roof structure, as noted on Site Plan PV-S 1, can satisfactorily withstand
the additional loads as proposed and will also meet the applicable standards included in
the NYS 2017 Supplement,ASCE 7-10, and 2015 IRC.
My analysis indicates that the areas of the existing roof,where the additional weight is to
be located, and only as it applies to Solar Liberty specified equipment and their tributary
areas, are capable of supporting a total load of at least 56 psf.
In 2009 the roof was replaced,was a "tear off', and a single layer of asphalt shingle
roofing was added to the existing plywood sheathing.
The maximum existing total load on these areas of the roof is estimated to be 48 psf
(DL=9,LL=39) leaving an available capacity of at least 8 psf. The average weight of the
proposed solar panels and framework is less than 4 psf.
Therefore,the roof framing in these areas will not be overstressed by the installation of
the solar panels and framework. � O Neil/NEi y
Thank you for the opportunity to be of service coA ,C�t3�2z A4,0°114.
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Sincerely, iti
R(1144.it4°' da oa36t4
Anthony R Yannotti
FingerLakesEngineering.com 1-800-255-8779