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Lateral Load Resisting System Design (Cont.) <br />Horizontal Diaphragm Design <br />Loading Case 2 Blocked Diaphragm <br />Total Length, L =16.0 ft <br />Max Width, W =40.0 ft <br />L/W Ratio = 0.40 <4:1 Satisfactory <br />Shear at Supports =2.2 kips <br />Distance to Shear Wall Line =31.0 ft <br />Min Shearing Distance =40.0 ft <br />Shear Transferred from above =0.0 kips value at the location of max shear <br />Max Shear, Vu =6.4 kips <br />Max Unit Shear, Vunit =160 plf <br />Chord Design 10.00 <br />Linear Load on the Diaphragm, w = aW = 279 plf <br />Moment on the Diaphragm, Mu = wL2/8 =8.9 k-ft <br />Chord Axial Load, Tu = Cu =Mu/W =223 lb <br />Use 1 2x4 DF-L No.2 or larger w/1 CMST14 Strap(s) at splices <br />Tall =9781 lb Tall =9271 lb <br />DCR = Tu/Tall =0.023 <1 Satisfactory DCR = Tu/Tall =0.024 <1 Satisfactory <br />Alternatively, use 1 continuous 2x4 DF-L No.2 or larger <br />Call =17605 lb Tall =9781 lb <br />DCR = Cu/Call =0.013 <1 Satisfactory DCR = Tu/Tall =0.023 <1 Satisfactory <br />Summary of Results <br />4 plf <br />160 plf <br />Required Nominal Resistance, Vn = Vu/φ 201 plf <br />Use 15/32" blocked Sheathing Panel w/ 10d nails @6-6-12 <br />L <br />Provided Resistance <br />Vn =580 plf <br />φ =0.8 <br />DCR = Vu/φVn =0.346 <1 Satisfactory <br />Loading Case Max Unit Shear, Vu <br />1 <br />2