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Glulam Beam with Combined Bending & Axial Loads <br /> (Version 2.0, 1-15-10) <br /> DESCRIPTION : Dragstrut with axial wind <br /> ALLOWABLE STRESSES <br /> Shear stress = 265 psi <br /> Bending stress = 2,400 psi <br /> Tension parallel to grain = 1,100 psi <br /> Compression parallel to grain — 1,650 psi <br /> Ex = 1,800 ksi <br /> Ex min = 930 ksi <br /> Ey min = 830 ksi <br /> Maximum allowable deflection = Span/ 240 <br /> Allowable stress increase for vertical loads only = 1.15 <br /> Allowable stress increase for combined loading = 1.60 <br /> DESIGN DATA <br /> Beam span = 16.00 ft Unbraced Lengths <br /> Uniform Dead Load = 540 plf "X" axis = 16.00 ft <br /> Uniform Live Load = 640 plf "Y" axis -top = 4.00 ft <br /> Axial Load = 10.80 kips "Y" axis - bottom = 16.00 ft <br /> Percent of live load to combine with axial load 50 % <br /> Allowable overstress 0 % <br /> ===> Beam Design is Adequate <br /> Area = 76.9 inA2 <br /> 5.125 x 15.00 Section Modulus = 192.2 in^3 <br /> Moment of Inertia = 1441.4 inA4 <br /> VERTICAL LOADS ONLY! <br /> Span = 16.00 ft Reaction = 9.44 kips <br /> Uniform Load = 1.180 kips/ft Moment = 37.76 kip-ft <br /> Maximum Stress Allowable Stress Stress % <br /> fv = 155 psi Fv' = 305 psi 51.0 % <br /> fb = 2,358 psi Fb' = 2,735 psi 86.2 % <br /> Deflection = 0.671 inches ===> Span/ 286 <br /> Cv = [(5.125 * 12 *21)/(b*d * L)]^0.10 = 1.000 <br /> CI = (1+z)/1.9 - [((1+z)/1.9)^2-z/0.95]^0.5 = 0.991 <br /> Le = 2.06Lu = 98.88 in <br /> Rb = [(Le*d)/b^2]^0.5 = 7.51 <br /> FbE = 1.20*Emin/Rb^2 = 17,638 psi <br /> Fb* = Fb*DOL = 2,760 psi <br /> z = FbE/Fb* = 6.39 <br /> F'b =,Fb* DOL* (Cv or CI) = 2,735 psi <br />