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i <br /> JOSE D. GARCIA Job Name: Gambocorto, Daniel Residence <br /> CONSULTING ENGINEER,I.I.C. Job Address: 38721 9th Ave. <br /> CML/STRUCTURAL <br /> 17440N.E.4th.Ave.NwthWaml Beach,Fl33182 Zephyrhills, Florida 33542 <br /> Tel:(305)903-5706 Emall:)garda.pe®outlook.eom <br /> FLA P.E.Llcence No.78M Job Number: 19-085 <br /> CHAPTER 3: BACKWARD CALCULATIONS TO DETERMINE MAXIMUM WIND LOAD:CAPACITY <br /> _._. <br /> 1.0 lag screw(s)with 2.5" penetration into SYP= 307 Win* 2.5 in= 767.5 lb(withdrawal) <br /> Tributary area for the worst case.Zone 2 PV panels= 11 sf <br /> Net uplift wind load W= 767.5 / 11 <br /> W= 69.77 psf Net Uplift <br /> That is why 1.0 lag screw(q) (5/16"dia.)with 2.5" penetration to 5YP at 11 sf Atrib. per group <br /> of screw(s)have a wind load capacity of= 69.77 psf(Net Uplift) <br /> Actual wind load with 145 mph at 18 sf area <br /> Zone 1= 19 psf OK <br /> Zone 2= 31.5 psf 10 K' <br /> Zone 3 = 47.08 psf OK <br /> CHAPTER 4,:'VERIFICATION EXISTING STRUCTURE"WILL ACCOMMODATE ;ADDITIONAL, <br /> 6EAD`LOAD <br /> i <br /> Existing structure superimposed loads(estimated design loads): <br /> Dead load= 25+10=35 psf <br /> Live load= 30 psf <br /> Photovoltaic system superimposed loads <br /> Dead Load= 3 psf <br /> Life Load= 0 psf <br /> Assume Design Parameters: <br /> The exist.Structure has been built under a building permit and is in its original condition.The existing <br /> roof structure is capable of its code required loads and the ability of the roof structure to support LL&DL <br /> loads has not been substantially reduced by age of the structure.Contractor shall make an inspection of the <br /> existing roof framing system prior to installation of the roof mounted solar system to verify that the existing <br /> roof is capable of supporting minimum roof live loads. <br /> I <br /> Page 6 <br />