Laserfiche WebLink
% <br /> i � � I <br /> ' ' ' ,�� �I ,��, ,,_. 18�0 W AshtOn B9vd. � <br />' � "-� '� Lehi, L➢T 84043 <br /> Structural Group <br /> Jon P. Ward, SE, PE Clint C. Karren, PE <br /> Structural Engineering Manager Structural Engrneering Manager <br /> jon.ward�a vivintsolar.com clint.karren�vivintsolar.com <br /> Januar 13, 2017 <br /> Y <br />� <br /> Mr. Dan Rock, Project Manager <br /> Vivint Solar <br /> 1 S00 W Ashton Blvd. <br /> Lehi, Utah 84043 <br /> Re: Structural Engineering Services <br /> Harnden Residence <br /> 6.840 Stephens Path,Zephyrhills, FL <br /> S-5390299; FL-01 <br />' Dear Mr. Rock: <br />�' Pursuant to your request,we have reviewed the following information regarding solar panel installation on the roof of <br /> I the above referenced home: <br /> 1. Site VisiWerification Form prepared by a representative from our office under my supervision identifying <br /> specific site information including size and spacing of inembers for the existing roof structure. <br /> 2. Proposed layout of the system including connection details for the solar panels. <br />' 3. Photographs of the interior and exterior of the roof system identifying existing structural members and <br /> their conditions. <br /> Based on the above information we have evaluated the structural capacity of the existing roof system to support the <br /> additional loads imposed by the solar panels and have the following comments related to our review and evaluation: <br />'�, Description of Residence: <br /> The existing residence is typical wood framing construction with the roof system consisting of the following: <br />, • Roof Section: Prefabricated trusses at 24" on center. The attic space is unfinished and photos indicate <br /> that there was free access to visually inspect the size and condition of the roof inembers. <br /> All wood material utilized for the roof system is assumed to be Southern Pine#2 or better with standard construction <br />� components. The existing roofing material consists of a maximum of two layers of composite shingle. <br />� A. Loading Criteria <br /> 8.0 PSF= Dead Load (roofing/framing) <br /> 2.6 PSF= Dead Load (solar panels/mounting hardware) <br /> 10.6 PSF=Total Dead Load <br /> � 20 PSF= Ground Snow Load (based on local requirements) <br /> ; Wind speed of 145 mph (based on Exposure Category D-the total area subject to wind uplift is calculated for the <br /> Interior, Edge, and Corner Zones of the dwelling.) <br />� B. Solar Panel Anchorage <br /> 1. The solar panels shall be mounted in accordance with the most recent "EcoFasten Solar Installation Manual", <br /> which can be found on the EcoFasten Solar website (www.ecofastensolar.com). If during solar panel <br /> Page 1 of 2 � � - - � <br /> � � • �_z. ' ' -, I <br />