HomeMy WebLinkAboutStructuralCert T
January 20, 2021
Re: SolarRoofTM Structure Qualification Certification Letter
SolarRoofTM is a roofing system comprised of both PV and non-PV smooth or textured roofing
elements. Please refer to the product data sheets, UL listing, and installation documentation
for further information.
Installation of SolarRoofTm requires a full tear-off of all existing layers of roof covering
materials. This unloads the weight of all existing layers of roofing material from the roof
structure. The net installed weight of the smooth or textured SolarRoofTM system does not
exceed 4 psf, is evenly distributed, and no additional layers of roofing material is permitted.
Consequently, the net additional loading impact to existing gravity load resisting elements is
less than 5% for the framing of all pitched roof structures with existing roofing material
comprised of comp shingle, slate, or concrete/clay tile. Note that this assessment does not
apply to structures with light weight roofing materials such as metal, plastic, fiberglass,
synthetic, or other roof coverings.
Installer/Contractor shall perform a full tear-off of all existing layers of roofing material above
existing sheathing/decking and verify existing roof framing and sheathing/decking to be in
suitable condition and not exhibiting any signs of structural damage which may diminish the
capacity of its members or connections prior to commencement of roofing installation.
I certify that installation of the smooth or textured SolarRoofTM system on existing structures
with: a) existing roofing material comprised of comp shingle, slate, or concrete/clay tile and
b) with no existing structural damage; meets the criteria outlined in the "Alterations" section of
the "Prescriptive Compliance Method" chapter of the IEBC and the 2017 FEBC, and is
therefore permitted by code without alterations or strengthening of the existing framing.
Florida Product Approval # FL31342
Henry Zhu, P.E.
Civil Engineer, Tesla
yonzhu@tesla.com
Direct: (415) 992-1723
Licenses: AZ, CA, FL, MA, MD, NJ, NM, SC, TX, UT, WA
Henry Zhu e:2021 01.21itally signed"08:10:Henry
OaZhu
T - 5 L n Tesla, Inc.
3500 Deer Creek,Palo Alto,CA 94304