Laserfiche WebLink
Roof/Ceiling dead load, RDL =18 psf <br />Floor dead load, FDL =16.0 psf <br />Wall dead load, WDL =15 psf <br />Ω = 3.0 (May use 2.0 for flexible diaphragm, footnote b) <br />Base shear coefficient, Cs =0.164 SDS=1.063 <br />Wind pressure, WP =16.40 psf <br />Tributary Height at Roof, THR =4 ft Roof level shear wall height, HR =8 ft <br />Tributary Height at 2nd Flr, TH2 =4 ft 2nd level shear wall hegith, H2 =0 ft <br />ROOF LEVEL SHEAR WALLS - LINE 1 <br />Total shr wall length, SL =6.5 =6.5 <br />Tributary width, TW =(21) / 2 =10.5 <br />Tributary length, TL =16 =16.0 <br />Tributary area, TA =TW * TL =168 <br />Seismic shear, VSR=(RDL*TA + FDL*TA+2*WDL*TW*THR)*Cs =1140.4 lb <br />Vs=VSR / SL =175.4 plf <br />Wind shear, Vw =(WP * TW * THR) / SL =106.0 plf <br />Therefore V = max(VSR, Vw) =175.4 plf; <br />Use shear wall Type 1 w/ allow =280 plf <br />6.5 ft shr wall panel: <br />Hold-down, Use <br />HDU2 = 2306 lb <br />Mot = V * HR * (shr wall panel) =9123 <br />Mr= (WDL*HR)*(shr wall panel)2 / 2=2535 <br />Uplift = [(Mot)*0.7 - (Mr)*(0.6-0.14SDS)] / [1.2 *(shr wall panel)] =672.13 <br />ROOF LEVEL SHEAR WALLS - LINE 2 <br /> Total shr wall length, SL =Existing shr wall - no change =0 <br />Tributary width, TW =(21) / 2 =10.5 <br />Tributary length, TL =16 =16.0 <br />Tributary area, TA =TW * TL =168 <br />Seismic shear, VSR=(RDL*TA + FDL*TA+2*WDL*TW*THR)*Cs =1140.4 lb <br />Vs=VSR / SL =#DIV/0!plf <br />Wind shear, Vw =(WP * TW * THR) / SL =#DIV/0!plf <br />Therefore V = max(VSR, Vw) =#DIV/0!plf; <br />Use shear wall Type 1 w/ allow =280 plf <br />Existing shr wall - no change ft shr wall panel: <br />Mot = V * HR * (shr wall panel) =#DIV/0!Hold-down, Use <br />HDU2 = 2306 lbMr= (WDL*HR)*(shr wall panel)2 / 2=###### <br />Uplift = [(Mot)*0.7 - (Mr)*(0.6-0.14SDS)] / [1.2 *(shr wall panel)] =#DIV/0! <br />ROOF LEVEL SHEAR WALLS - LINE A <br /> Total shr wall length, SL =5.1 =5.1 <br />Tributary width, TW =(16) / 2 =8 <br />Tributary length, TL =21 =21.0