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Dong Engineering Inc. <br />ADU <br />3205 S.DEEGAN DR, SANTA ANA, CA 92704 <br />Job#: 240165 <br />Date: 4/15/2024 <br />PLAN: 1 <br />CODE: CBC 2022 <br />SECTION: 1Y <br />Number of Story: 1 Section width: 44.5(ft)Section length: 20(ft) <br />Base height: 0(ft)Slope roof height: 15.5(ft)Gable mean roof height: 12.5(ft) <br />WIND PARAMETERS PER ASCE7-16, CHAPTER 27, MWFRS BUILDINGS OF ALL HEIGHTS: <br />Wind speed = 110, Wind exposure = C, Wind importance factor Iw = 1 <br />Coefficients: Kd = 0.85, Kzt = 1, G = 0.85, Gcpi = +/-0.18, omega = 1 <br />B = 44.5(ft), L = 20(ft), H = 12.5(ft)-->L/B = 0.45, H/L = 0.63 <br />Wall coefficient: Cpw = 0.8, Cpl = -0.5, Roof coefficient: Cpw = (0.06;-0.41), Cpl = -0.6 <br />Wind exposure = C-->anpha = 9.5, zg = 900 <br />Kz = 2,01*(15/zg)^(2/anpha)qz = 0,00256*Kz*Kzt*Kd*V^2*Iw P = G(Cpw*qz+Cpl*qh) <br />WIND LOAD: <br />SEISMIC PARAMETERS PER ASCE7-16, CHAPTER 12.8, ELF PROCEDURE: <br />Light frame wood-->Ry = 6.5, Site class :D, SDS = 2FaSs/3 =1.038, SD1 = 2FvS1/3 =0, <br />Seismic design category: D, I = 1, 0.7*V = 0.7*SDS*I*W/Ry = 0.7*1.038*1*W/6.5 = 0.1118*W <br />Total Seismic Load = 53.66 = 53.66 PLF <br />Redistrib: 480*9 = 4320 PLFxFT <br />DIAPHRAGM & CHORD FORCE PER ASCE07-16 SECTION 12.10 <br />ROOF DIAPHRAGM <br />Max shear = 76.66 x 40 / (2 x 20) = 76.66 PLF <br />Use: 15/32" apa rated unblock 32/16 w/8d common nails at 6", 6", 12" o.c. <br />Chord force = 76.66 x 40^2 / (8 x 20) = 766.6 LBS <br />Splice w/ min. (5) 16d sinker nails each side of splice at 8" o.c. (standard construction) <br />(z, Kz, qz, P): (15.5, 0.85, 22.51, 24.8); (15, 0.85, 22.35, 24.7) <br />ROOF <br />Roof = 15*20 = 300 PLF <br />Wall = 15*2*4.5 + 10*1*4.5 = 180 PLF <br />Shear = 0.1118(300+180) = 0.1118*480 = 53.66 PLF <br />Plate height: ROOF = 9(ft) <br />SHEAR ROOF = 53.66*480*9/4320 = 53.66 PLF <br />SHEAR ROOF = 0.6*W = 115.71(plf) <br />ROOF 115.71 PLF WIND GOVERN <br />Page 7 of 20 <br />3205 S Deegan Dr <br />#23/10/2025