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Dong Engineering Inc. <br />2 ADU'S <br />512-514 HUYLARS LN, SANTA ANA, CA 92703 <br />Job#: 250195 <br />Date: 5/21/2025 <br />PLAN: 1 <br />CODE: CBC 2022 <br />SECTION: 1Y <br />Number of Story: 1 Section width: 56.5(ft)Section length: 33(ft) <br />Base height: 1.5(ft)Slope roof height: 15(ft)Gable mean roof height: 11.5(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 = 56.5(ft), L = 35(ft), H = 13(ft)-->L/B = 0.62, H/L = 0.37 <br />Wall coefficient: Cpw = 0.8, Cpl = -0.5, Roof coefficient: Cpw = (0.01;-0.45), 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-->Ry = 6.5, Site class :D, SDS = 2FaSs/3 =1.06, SD1 = 2FvS1/3 =0, <br />Seismic design category: D, I = 1, 0.7*V = 0.7*SDS*I*W/Ry = 0.7*1.06*1*W/6.5 = 0.1142*W <br />Total Seismic Load = 90.64 = 90.64 PLF <br />Redistrib: 794*8 = 6352 PLFxFT <br />DIAPHRAGM & CHORD FORCE PER ASCE07-16 SECTION 12.10 <br />ROOF DIAPHRAGM <br />Max shear = 129.49 x 56.5 / (2 x 33) = 110.85 PLF <br />Use: 15/32" apa rated unblock 32/16 w/8d common nails at 6", 6", 12" o.c. <br />Chord force = 129.49 x 56.5^2 / (8 x 33) = 1565.77 LBS <br />Splice w/ min. (9) 16d sinker nails each side of splice at 8" o.c. (standard construction) <br />(z, Kz, qz, P): (16.5, 0.87, 22.8, 25.01); (15, 0.85, 22.35, 24.7) <br />ROOF <br />Roof = 18*33 = 594 PLF <br />Wall = 15*2*4 + 10*2*4 = 200 PLF <br />Shear = 0.1142(594+200) = 0.1142*794 = 90.67 PLF <br />Plate height: ROOF = 8(ft) <br />SHEAR ROOF = 90.64*794*8/6352 = 90.64 PLF <br />SHEAR ROOF = 0.6*W = 106.39(plf) <br />ROOF 106.39 PLF WIND GOVERN <br />8 of 26