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WEST <br />t J..., <br />COAST !........ l� 9540 Semiahmoo Parkway (425) 347-8998 <br />STRUCTURAL° ! #137 wcse.net <br />J.....:. <br />ENGINEERING INC. Blaine, WA98230 <br />Two Story Shear Wall Design <br />Shear Wall Grid Location <br />Misc. Info: <br />Overturning Moment (OTM) <br />OTM = 12.1 k-ft <br />Resisting Moment (RM) <br />W Above = 0.2 kips <br />W Middle = 0.1 kips <br />W Wall = 0.5 kips <br />RM = 2.3 k-ft <br />Grid Line: 4 <br />Aspect Ratio Check (2w/h) = 1.33 <br />Uplift Force Qa end of Shear Wall ( T) <br />T = 1.8 kips <br />Wind or Seismic Critical : W <br />V t : 1/2(3.03)/16 = 0.095 kif <br />V m : 1 /2(2.65)/16 = 0.083 kif <br />H upper = 9.0 It H lower = 8.0 ft H total = 17.0 It <br />L = 5.3 It <br />Trib. Length Upper ( A) <br />Dead Load Above ( w above) <br />4 ft Lower ( M) : 4 ft <br />15 psf Lower ( w lower) : 10 psf <br />Reliability - Redundancy Factor: <br />Seismic Base Shear: <br />Shear Wall Base Shear ( Vb) : 178 plf <br />Internal / External ( I/E) : E <br />Nailing Designation : SW2 <br />Holdown Force ( T) : 1.8 kips <br />Holdown Designation : ? <br />Roof Diaphragm: 3.74 kips 2nd Floor Walls: 3.74 kips 66% <br />2nd Floor Diaph: 1.93 kips 1st Floor Walls: 5.67 kips 100% <br />Note: Seismic force -resisting system shall consist of at least two bays of seismic force resisting <br />perimeter framing on each side of the structure in each orthogonal direction at each story resisting <br />more than 35 percent of the base shear. The number of bays for a shear wall shall be calculated <br />as the length of shear wall divided by the story height or two times the length of shear wall divided <br />by the story height for light -framed construction. <br />Shear Wall Bays in X - Direction Shear Wall Bays in Y - Direction <br />2nd Floor Side 1: 5.75 Side 2: 4.00 Side 1: 6.75 Side 2: 8.50 <br />1 st Floor Side 1: 8.00 Side 2: 4.00 Side 1: 8.00 Side 2: 8.00 <br />No increase in Seismic Force <br />Project: W4861 Sheet No: 17 9/13/2023 <br />