Unformatted text preview: L“ __J 10.89 A sewn lumber column with a lZSmmsquare cross section and a 3.6m PROBLEM 10.90 eﬁ‘eetive length is made of a grade of wood that has an adjusted allowable stress for
mpression parallel to the grain are = 9.2 MPa and a modulus of elasticity E = 12
GPa. Using the allowablestress method, determine the maximum load 1’ that can be
safely supported with an eccentricin of 50 m. 10.90 Solve Prob. 10.89 using the interaction method and an allowable stress in SOLUTION bending of 12.8 We.
.‘ 3.C
a: 2§ mm = 0.12;,“ An” = riczswoJM aha—fa: , 288
5‘ : 01.2 HE: E: I2000 149:. 3mm 49w law: or 0.8 , Kce = 0300
_ Val? = (0.3003120001 : :4 MP /6 =0.47177
61a ‘(L/av)z (23.2? 4'5 A Q” °
C = \+ £62352: l/ \+ ggzozy  Sac/62 = 0. #IS‘”
P 26. Q 2:. C. 5d, c ~_ (SLQ = (q.2l(o.mss7)r 3.804 HPa e=50mm=0ﬁ$70m
J I = ﬁat”: #(nggj‘r 20.39010“ w.‘ c :ch = 0.0625'm I _ . a
’P < . ec:  W" 5“" (o.osaXo.oasS _ l  a.
ASL: r. I 61,2 05.615¥10'3)(3.80‘l «10‘ ) (20.3% no )(iza x :o‘) ll 34,7xlo3 N = 3%.? MU 4" ...
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 Summer '10
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