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SITE STRUCTURES Project Airport 100 sheet 914 <br />10511 19th Ave SE, Suite C date ©%- ,2k_gX <br />Everett, WA, (425)-357-9600 pr . no. S-21-006 <br />INTERIOR WALL HEADER DESIGN <br />Header Data <br />Header width "` 8 inches Concrete Strength 4006 psi <br />Header span !.00 ft <br />Header depth 24 inches d = 21.00 inches <br />In/d ratio 2.29 Deep Beam limit In/d < 5.0 <br />Min shear steel ( Area / spacing) ratio 0.012 Min Rebar spacing <br />Max spacing of shear steel 4.8 inches # 3 @ 9.17 <br /># 4 @ 16.67 <br />Min horiz steel ( Area / spacing ) ratio 0.02 # 4 @ 10.00 <br />Max spacing of horzontal steel 8 inches # 5 @ 15.50 <br />Review shear capacity of header <br />Reinforcing yield strength <br />Shear reinforcing area <br />spacing <br />Reinf shear capacity (I)Vs <br />Total Shear Capacity <br />Max Wn @ In/d < 2 <br />Max Wn @ 2 < In/d < 5 <br />Review flexural capacity of header <br />60 ksi <br />0.20: sq in <br />On <br />34 k nn <br />52k U <br />72 k <br />8496 k <br />Horz reinf area <br />Harz reinf spacing <br />Conc shear capacity OVc <br />Factored shear Vu <br />min As based on 200 bwd/fy 0.56 sq inches /rr11 <br />min As based on eq 10-3 0.53 sq inches <br />As reqd based on bending model 0.60 sq inches <br />As reqd based on tie - strut model <br />assume Vu is focused @ the center of the header <br />then Tu = 41.00 k <br />As reqd = 0.76 sq inches <br />36 k <br />0.31 sq in <br />12 in <br />W*—W <br />