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Loyd W. Martin Solar Structures Engineering <br />2510 W. 237th St. #206 Torrance, CA 90505 Tel:1.310.464.1804 <br />Email: loydwmartin@gmail.com www.loydwmartin.com <br />Check Existing Roof Rafters: <br />P PP PP P <br />W DL + LL -k kk kh k <br />//////A <br />l/////////////////////////////j <br />W DL+LL = 30 psf x 2 ft. = 60 pif W DL - <br />Rl R2 <br />19.5' <br />3' 16.5' <br />Total load on rafter =60 plf x 3 ft. + 28 plf x 16.5 ft + ( 4' x 2.75' x 3 psf x 6 ) <br />= 840 lbs <1,170 lbs OK <br />Check attachment of Support to Existing Structure for Wind Uplift <br />CHECK SOLAR STRUCTURE ATTACHMENTS PER ASCE 7-10 COMPONENTS AND <br />CLADDING METHOD 1 PART 2 FIGURE 30.5-1 THEREFORE CHECK ATTACHMENT <br />FOR TYPICAL CRITICAL LOAD WHICH IS THE EDGE ZONE - ZONE 2 <br />NOTE: PER DEFINITION ON SHEET 243 OF ASCE 7-10 EFFECTIVE WIND AREA: <br />"FOR CLADDING FASTENERS THE EFFECTIVE WIND AREA SHALL NOT BE <br />GREATER THAN THE AREA THAT IS TRIBUTARY TO AN INDIVIDUAL FASTENER." <br />PER FIGURE 30.5-1 OF SHEET 346 ASCE 7-10 WIND SPEED 130 MPH <br />EFFECTIVE AREA =15 SQ FT <br />INTERPOLATION OF WIND UPLIFT FORCE: <br />PWOF ESS/8:» <br />No. C58724 i <br />Pneoo = -46.5 psf <br />4* Exp. 3-31-15 <br />9/4!YAL·/ <br />2014-870 Smart Energy Tammy Doan Residence <br />Sht # 3 of 6 <br />Date: May 30,2014 <br />a.* HBB517