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Dong Engineering Inc. <br />ADDITION-ADU <br />2102 N.WRIGHT ST, SANTA ANA, CA 92705 <br />Job#: 230520 <br />Date: 11/28/2023 <br />PLAN: 1 <br />CODE: CBC 2022 <br />SECTION: 3X <br />Number of Story: 1 Section width: 17.5(ft)Section length: 13(ft) <br />Base height: 0(ft)Slope roof height: 10.5(ft)Gable mean roof height: 9.5(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 = 60(ft), L = 50(ft), H = 11(ft)-->L/B = 0.83, H/L = 0.22 <br />Wall coefficient: Cpw = 0.8, Cpl = -0.5, Roof coefficient: Cpw = (0.14;-0.36), Cpl = -0.57 <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 =1.05, SD1 = 2FvS1/3 =0, <br />Seismic design category: D, I = 1, 0.7*V = 0.7*SDS*I*W/Rx = 0.7*1.05*1*W/6.5 = 0.1131*W <br />Total Seismic Load = 35.62 = 35.62 PLF <br />Redistrib: 315*8 = 2520 PLFxFT <br />DIAPHRAGM & CHORD FORCE PER ASCE07-16 SECTION 12.10 <br />ROOF DIAPHRAGM <br />Max shear = 50.89 x 17.5 / (2 x 13) = 34.25 PLF <br />Use: 15/32" apa rated unblock 32/16 w/8d common nails at 6", 6", 12" o.c. <br />Chord force = 50.89 x 17.5^2 / (8 x 13) = 149.86 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, 24.7) <br />ROOF <br />Roof = 15*13 = 195 PLF <br />Wall = 15*2*4 = 120 PLF <br />Shear = 0.1131(195+120) = 0.1131*315 = 35.63 PLF <br />Plate height: ROOF = 8(ft) <br />SHEAR ROOF = 35.62*315*8/2520 = 35.62 PLF <br />SHEAR ROOF = 0.6*W = 79.4(plf) <br />ROOF 79.4 PLF WIND GOVERN <br />10 of 25 <br />2102 N Wright St & #2 - <br />101117955-566/13/2024