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SIMPLY SUPPORTED BEAM DESIGN <br />FALSE FALSE FALSE FALSE FALSE FALSE <br />RJ CJ HDR1 HDR2 CB1 HDR3 <br />SPAN ft 12.00 14.00 6.00 5.50 18.00 3.00 <br />MATERIAL (WOOD, STEEL)WOOD DF-L WOOD DF-L WOOD DF-L WOOD DF-L WOOD DF-L WOOD DF-L <br />BEAM SECTION in 2x 8 2x 8 6x 6 6x 8 6x12 6x 6 <br />GRADE No.2 No.2 No.2 No.2 No.1 No.2 <br />LOAD CASE 6:(1.0 + 0.105SDS)D + 0.525E + 0.75(L + Lr)Wood Load Duration Factor = 1.6 <br />MAX. BENDING MOMENT lb-ft 474 441 397 922 6,583 349 <br />MAX. DEFLECTION in 0.215 0.272 0.028 0.022 0.432 0.006 <br />LEFT REACTION lbs 211 168 352 894 1,950 621 <br />RIGHT REACTION lbs 211 168 352 894 1,950 621 <br />LOAD CASE 7:(0.6 − 0.14SDS)D + 0.7E Wood Load Duration Factor = 1.6 <br />MAX. BENDING MOMENT lb-ft 101 55 115 201 822 73 <br />MAX. DEFLECTION in 0.046 0.034 0.008 0.005 0.054 0.001 <br />LEFT REACTION lbs 45 21 103 195 244 130 <br />RIGHT REACTION lbs 45 21 103 195 244 130 <br />CHECK BENDING STRESSES <br />MAX. BENDING MOMENT lb-ft 670.3 847.2 528.9 1,168.4 12,636.0 439.9 <br />SECTION MODULUS, S in3 13.1 13.1 27.7 51.6 121.2 27.7 <br />BENDING STRESS psi 612.1 773.7 228.9 271.9 1,250.8 190.4 <br />CHECK BENDING STRESS RATIO 49% OK 62% OK 26% OK 31% OK 93% OK 22% OK <br />CHECK SHEAR STRESSES <br />MAX. SHEAR FORCE lbs 239.4 242.06 392.49 1,014.75 2,808.00 706.50 <br />SECTION AREA, A in2 10.88 10.88 30.25 41.25 63.25 30.25 <br />SHEAR STRESS, fv psi 33.02 33.39 19.46 36.90 66.59 35.03 <br />CHECK SHEAR STRESS RATIO 16% OK 16% OK 11% OK 22% OK 39% OK 21% OK <br />CHECK DEFLECTION <br />MOMENT OF INERTIA, I in4 47.63 47.63 76.26 193.36 697.07 76.26 <br />MAX. DEFLECTION, DL in 0.122 0.091 0.022 0.013 0.144 0.003 <br />MAX. DEFLECTION, LL in 0.163 0.302 0.010 0.012 0.478 0.004 <br />DEFLECTION LIMITS, LL L / 360 L / 360 L / 360 L / 360 L / 360 L / 360 <br />CHECK DEFLECTION LL < 0.4 OK < 0.47 OK < 0.2 OK < 0.18 OK < 0.6 OK < 0.1 OK <br />MAX. DEFLECTION, DL+LL in 0.285 0.392 0.031 0.025 0.622 0.007 <br />DEFLECTION LIMITS, DL+LL L / 240 L / 240 L / 240 L / 240 L / 240 L / 240 <br />CHECK DEFLECTION (DL+LL)< 0.6 OK < 0.7 OK < 0.3 OK < 0.28 OK < 0.9 OK < 0.15 OK <br />01-23 602 S Genoa Dr 1-Story_R3.xls, Roof Beam Design 1 Page 18