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<br /> PROPERTIES OF MEMBERS PAGE 3 <br /> FROM TIMBER CONSTRUCTION MANUAL, '85, T-7.1 <br /> SIZE S I <br /> 2X4 SA4=3.063 IA4 =5.359 <br /> 2X6 SA6=7,563 IA6=20,80 <br /> 2X8 SA8= 13.14 IA8=47.64 <br /> 2X10 SAI0=21.39 IAI0=98,92 <br /> 2X12 SAI2=31.64 IA12= 178,0 <br /> SPECIES GRADE Fb (SSTD 10-93) EX 106 <br />GROUP SPECIES 2X4 2X6 2X8 <br />II S YELLOW PINE #2 2750 2300 2200 1,6 <br /> DOUGLAS FIR-LARCH #2 2400 2100 1950 1.7 <br />III HEM-FIR #2 2350 2350 1900 1.4 <br /> SPRUCE-PINE-FIR #2 2400 2100 1950 1.3 <br /> <br />WALLS: <br /> <br />TRIAL: <br />Fb=2350 <br /> <br />SELECT MEMBERS: <br />SPECIES: HEM-FIR, #2 <br />Eb= 1.4.106 RD=240 DEFLECTION RATIO, lid <br /> <br />FOR SIMPLE BEAM, UNIFORMLY LOADED: WPLFWIT = 17,568 TRANS <br />MLD= (WPLFWIL). (WSPA 12)2 M = wl2 /8 WPLFWIL =21.96 LONG IT <br />12 8 <br /> <br />MLD =2108,155 <br /> <br />M = wl2 / 8 SIZE <br />S = M / Fb <br />DEFL = 5 wJ4 /384 E I ~: <br /> <br />2X8 <br />S = M / Fb 2X10 <br />2X12 <br /> <br />S <br /> <br />SA4=3.063 <br />SA6=7,563 <br />SA8= 13,14 <br />SAI0=21.39 <br />SAI2=31.64 <br /> <br />I <br /> <br />IA4=5,359 <br />IA6=20,80 <br />1A8=47,64 <br />1A10=98.92 <br />1A12= 178,0 <br /> <br />SECTION MODULUS REQUIRED: <br /> <br />SLP= MLD <br />Fb <br />SLP = 0,897 <br /> <br />MOM OF INERTIA REQUIRED: <br /> <br />FROM MEMBER PROPERTIES: <br /> <br />DEFL = 5 wJ4 /384 E I (RE-ARRANGING:) <br /> <br />ILP=5,RD, (WPLFWIT). (WSPA 12)3 <br />12 384. Eb <br /> <br />REQUIRED SIZE IS: 2X4 <br /> <br />ILP =2.891 <br />