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DOUGLAS FIR 24F - V4 <br />Fb = <br />2400 psi <br />F„ = <br />265 psi <br />E = <br />1800 ksi <br />Fc-L = <br />650 psi <br />b x d <br />(i <br />Ma11ow (ft-k) = Fb' S <br />Vapow (k) = 2/3 * Fv' "` b * d <br />El <br />` " <br />11 <br />")(in) <br />S <br />(in") <br />Cva15 <br />Co = 1.0 <br />= 1.15 <br />= 1.33 <br />'Cp = 1.0 <br />= <br />1.33 <br />3 1 /2 x 6 <br />4.20 <br />4.83 <br />5.60 <br />3.71 <br />4.27 <br />4.95 <br />113.40 <br />63.00 <br />21.I0 <br />1.00 <br />3 1 /2 x 7 1 /2 <br />6.56 <br />7.55 <br />8.75 <br />4.64 <br />5.33 <br />6.18 <br />221.48 <br />123.05 <br />32.81 <br />1.00 <br />3 1 /2 x 9 <br />9.45 <br />10.87 <br />12.60 <br />5.57 <br />6.40 <br />7.42 <br />382.73 <br />21263 <br />47.25 <br />1.00 <br />3 1 /2 x 10 1 /2 <br />12.86 <br />14.79 <br />17.15 <br />6.49 <br />7.47 <br />8.66 <br />607.75 <br />337.64 <br />64.31 <br />1.00 <br />3 1 /2 x 12 <br />16.80 <br />19.32 <br />22.40 <br />7.42 <br />8.53 <br />9.89 <br />907.20 <br />504.00 <br />84.00 <br />1.00 <br />3 1 /2 x 13 1 /2 <br />21.26 <br />24.45 <br />28.35 <br />8.35 <br />9.60 <br />11.13 <br />1,291.70 <br />717.61 <br />106.31 <br />1.00 <br />3 1 /2 x 15 <br />26.25 <br />30.19 <br />35.00 <br />9.28 <br />10.67 <br />12.37 <br />1,771.88 <br />984.38 <br />131,25 <br />1.00 <br />3 1 /2 x 16 '1 /2 <br />30.84 <br />35.47 <br />41.12 <br />10.20 <br />11.73 <br />13.60 <br />2,358.37 <br />1310.20 <br />158.81 <br />0.97 <br />3 1 /2 x 18 <br />36.39 <br />41.85 <br />48.52 <br />11.13 <br />12.80 <br />14.84 <br />3,061.80 <br />1701.00 <br />189.00 <br />0.96 <br />3 1 /2 x 19112 <br />42.36 <br />48.72 <br />56.49 <br />12.06 <br />13.87 <br />16.08 <br />3,892.81 <br />2162.67 <br />221.81 <br />0.95 <br />3 1 /2 x 21 <br />48.77 <br />56.09 <br />65.03 <br />12.99 <br />14.93 <br />17.31 <br />4,862.03 <br />2701.13 <br />257.25 <br />0.95 <br />3 1 /2 x 22 1 /2 <br />55.60 <br />63.94 <br />74.13 <br />13.91 <br />16.00 <br />18.55 <br />5,980.08 <br />3322.27 <br />295.31 <br />0.94 <br />3 1 /2 x 24 <br />62.85 <br />72.28 <br />83.81 <br />14.84 <br />17.07 <br />19.79 <br />7,257.60 <br />4032.00 <br />336.00 <br />0.94 <br />3 1 /2 x 25 1 /2 <br />68.53 <br />78.81 <br />91.37 <br />15.77 <br />18.13 <br />21.02 <br />8,705.22 <br />4836.23 <br />379.31 <br />0.90 <br />3 1/2 x 27 <br />76.39 <br />87.85 <br />101.85 <br />16.70 <br />19.20 <br />22.26 <br />10,333.58 <br />5740.88 <br />425.25 <br />0.90 <br />3 1 /2 x 28 1 /2 <br />84.65 <br />97.35 <br />112.87 <br />17.62 <br />20.27 <br />23.50 <br />12,153.29 <br />6751.83 <br />473.81 <br />0.89 <br />3 1 /2 x 30 <br />93.32 <br />107.32 <br />124.43 <br />18.55 <br />21.33 <br />24.73 <br />14,175.00 <br />7875.00 <br />525.00 <br />0.89 <br />3 1 /2 x 31 1 /2 <br />102.38 <br />117.74 <br />136.51 <br />19.48 <br />22.40 <br />25.97 <br />16,409.33 <br />9116.30 <br />578.81 <br />0.88 <br />3 1/2 x 33 <br />109.38 <br />125.78 <br />145,84 <br />20,41 <br />23.47 <br />27.21 <br />18,866.93 <br />10481.63 <br />635.25 <br />0.86 <br />3 1 /2 x 34 1 /2 <br />119.02 <br />136.87 <br />158.69 <br />21.33 <br />24.53 <br />28.44 <br />21, 558.40 <br />11976.89 <br />694.31 <br />0.86 <br />3 1/2 x 36-7 <br />1 129.041 <br />148.401 <br />172.0511 <br />22.261 <br />25.601 <br />29.6811 <br />24,494.40 1 <br />13608.001 <br />766.0011 <br />0.85 <br />aThe preceding table assumes the following <br />values. Refer to 2001 NDS 5.3.2 to determine <br />actual Cv. <br />CV = (21 /L) " (12/d) "" (5.125/b) "<_ 1.0 <br />x= 10 <br />L <_ 20' for depths up to 15" <br />20' <_ L <_ 30' for depths up to 24" <br />30' <_ L <_ 40' for depths up to 31'/2" <br />40' <_ L <_ 50' for depths up to 36" <br />Cr3 <br />