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PROJECT : PAGE : <br />CLIENT : DESIGN BY : <br />JOB NO. : DATE : REVIEW BY : <br />Determine Base Shear (Derived from ASCE 7-16 Sec. 12.8 & Supplement 2) <br />V =MAX{ MIN [ SD1I / (RT) , SDS I / R ] , MAX(0.044SDSI , 0.01) , 0.5S1 I / R } W <br />= MAX{ MIN[ 0.39W , 0.15W ] , 0.04W , 0.00W }^ <br />= 0.20 W, (SD)(for S1 ≥ 0.6 g only) <br />=0.14 W, (ASD) =5.49 kips <br />Where SDS =1.285 (ASCE 7-16 Sec 11.4.4) <br />SD1 =Null (ASCE 7-16 Sec 11.4.8) <br />S1 =0.46 (ASCE 7-16 Sec 11.4.1) <br />R =6.5 (ASCE 7-16 Tab 12.2-1) <br />I =1 (ASCE 7-16 Tab 11.5-1) <br />Ct =0.02 (ASCE 7-16 Tab 12.8-2) <br />hn =19.9 ft <br />x =0.75 (ASCE 7-16 Tab 12.8-2) <br /> T = Ct (hn)x =0.189 sec, (ASCE 7-16 Sec 12.8.2.1) <br />Calculate Vertical Distribution of Forces & Allowable Elastic Drift (ASCE 7-16, Sec 12.8.3 & 12.8.6) <br />Level Wx hx hx <br />k Wxhx <br />k Fx , ASD (12.8-11)dxe,allowable, ASD <br />Roof 16.3 7.833 7.8 128 2.0 ( 0.12 Wx )0.5 <br />2ND 22.6 9.67 9.7 219 3.5 ( 0.15 Wx )0.5 <br />38.9 346 5.5 <br />Where k = 1 for T <= 0.5 <br />k = 0.5 T + 0.75 for T @ (0.5 , 2.5)Cd =4 ,(ASCE 7-16 Tab 12.2-1) <br />k = 2 for T >= 2.5 Da =0.02 hsx, (ASCE 7-16 Tab 12.12-1) <br />Calculate Diaphragm Forces (ASCE 7-10, Sec 12.10.1.1) <br />Level Wx SWx Fx SFx <br />Roof 16.3 16.3 2.0 2.0 2.8 ( 0.17 Wx ) <br />2ND 22.6 38.9 3.5 5.5 3.9 ( 0.17 Wx ) <br />38.9 603.4 <br />Where Fmin = 0.2 SDS I W x / 1.5 , ASD <br />Fmax = 0.4 SDS I W x / 1.5 , ASD <br /> <br />Fpx , ASD, (12.10-1) <br />VISAL TE <br />dxe,allowable, ASD = Da I / (1.4 Cd), (ASCE 7-16 Sec 12.8.6) <br />2002 Parton St, Santa Ana, CA 92707 <br />Two Story Seismic Analysis CBC 2022 <br />