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Dong Engineering Inc. <br />ADU <br />1602 W BROOK ST UNIT 2, SANTA ANA, CA 92703 <br />Job#: 240190 <br />Date: 5/14/2024 <br />PLAN: 1 <br />CODE: CBC 2022 <br />SECTION: 1X <br />Number of Story: 1 Section width: 18(ft)Section length: 20(ft) <br />Base height: 0.5(ft)Slope roof height: 12(ft)Gable mean roof height: 10(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 = 38.5(ft), L = 39(ft), H = 13(ft)-->L/B = 1.01, H/L = 0.33 <br />Wall coefficient: Cpw = 0.8, Cpl = -0.5 <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-->Rx = 6.5, Site class :D, SDS = 2FaSs/3 =1.037, SD1 = 2FvS1/3 =0, <br />Seismic design category: D, I = 1, 0.7*V = 0.7*SDS*I*W/Rx = 0.7*1.037*1*W/6.5 = 0.1117*W <br />Total Seismic Load = 44.67 = 44.67 PLF <br />Redistrib: 400*8 = 3200 PLFxFT <br />DIAPHRAGM & CHORD FORCE PER ASCE07-16 SECTION 12.10 <br />ROOF DIAPHRAGM <br />Max shear = 63.81 x 18 / (2 x 20) = 28.71 PLF <br />Use: 15/32" apa rated unblock 32/16 w/8d common nails at 6", 6", 12" o.c. <br />Chord force = 63.81 x 18^2 / (8 x 20) = 129.22 LBS <br />Splice w/ min. (1) 16d sinker nails each side of splice at 8" o.c. (standard construction) <br />(z, Kz, qz, P): (15, 0.85, 22.35, 24.65); (15, 0.85, 22.35, 15.2) <br />ROOF <br />Roof = 15*20 = 300 PLF <br />Wall = 15*1*4 + 10*1*4 = 100 PLF <br />Shear = 0.1117(300+100) = 0.1117*400 = 44.68 PLF <br />Plate height: ROOF = 8(ft) <br />SHEAR ROOF = 44.67*400*8/3200 = 44.67 PLF <br />SHEAR ROOF = 0.6*W = 66.05(plf) <br />ROOF 66.05 PLF WIND GOVERN <br />6 of 26