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STRUCTURAL ANALYSIS FOR NEW PHOTOVOLTAIC SOLAR SYSTEM <br />NOTE: THESE CALCULATIONS ARE BASED ON INFORMATION AND MEASUREMENTS PROVIDED BY THE CONTRACTOR FROMHIS SITE INSPECTION. <br />1 Project Information:PV SOLAR ARRAY: NGUYEN RESIDENCELatitude33.7402°deg N 509 S. STARBOARD STREET, SANTA ANA, CA 92704Longitude-117.942°deg WWind Speed 110 mph 95 mph (ASCE 7-22)Wind Exposure CSite Class DSeismic Design Category D <br />2 Loads: <br />Existing Roof Dead Loads:2 x 4 Trusses @ 24" OC 2.6 psf1/2" Roof Sheathing 1.7 psfRoof Felt 1.5 psfComposition5.0 psfMiscellaneous3.2 psfTotal14.0 psf <br />Existing Snow Load:0.0 psfExisting Roof Live Load:20.0 psfProposed Roof Live Load: 20.0 psf <br />Wind Load: Using CBC 2022 (ASCE 7-22), Chapter 29: Wind Loads on Rooftop Equipment, the following wind pressures were calculated.p = qh (GCp) (ge) (ga) = 7.88 -40.52 psfqh = 0.00256 Kz Kzt Kd Ke V2 =21.76 psfKz = 0.85 (0-15 = 0.85, 20 = 0.90, 25 = 0.94, 30 = 0.98, 40 = 1.04)GCp =0.7 -3.6 (Roof pitch = 17 deg, Zone = 2, Aeff = 23.2 sf) <br />ge = 1.50 <br />ga = 0.80 <br />Lag Bolt Capacity:5/16" lag bolt capacity = 270 lbs per inch embedmentWith 2 1/2" minimum embedment, capacity = 675 lbsRequired Capacity:40.52 psf *6 modules *23.2 sf =5640.2 lbs5640.2 lbs /10 lag bolt connections = 564.0 lbsThe pull-out capacity of the 5/16" lag bolts with a minimum 2 1/2" embedment into the roof rafter is sufficientto meet the demand of the wind uplift force on the solar system. <br />Seismic Load: Per the CEBC 2022 Section 503.4, if the demand-capacity ratio of the lateral load-carrying elements increases less than 10% due to the addition of the solar system, no special provisions or structuralmodifications are required.Existing Roof Weight = 14.0 psf *2490 sf =34860 lbsWeight of Solar System = 27 modules *54.5 lbs +313 lbs of racking = 1785 lbs1785lbs / 34860 lbs =0.05The increase in load from the solar system will not increase the demand-capacity ratio of the existing lateralload-carrying elements by over 10%. <br />NOTICE: VISION CIVIL ENGINEERING: JENNIFER KEMME, PEANY CHANGES TO OR USES OF THESE DOCUMENTS 12273 11TH STREET, YUCAIPA, CA 92399WITHOUT THE WRITTEN CONSENT OF VISION 909.754.8300,JENKEMME@VISIONCE.COMCIVIL ENGINEERING IS STRICTLY PROHIBITED.RCE 73054, EXP 12/31/24 <br />Prepared by JENNIFER KEMME 7/24/2024 Page 1 <br />509 S Starboard <br />St-Solar9/16/2024