9.39 A short timber post of Douglas fir is subjected to an axial compressive load of $40, 000 lb$ . The nominal dimensions of the post area are 8 in. by 8 in. Its length is 8 $ft ? 6$ in. Assume a proportional limit of 6000 psi. Using dressed dimensions, compute (a) stress (b) strain (c) total deformation

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9.39 A short timber post of Douglas fir is subjected to an axial compressive load of

40, 000 lb

. The nominal dimensions of the post area are 8 in. by 8 in. Its length is 8

ft ? 6

in. Assume a proportional limit of 6000 psi. Using dressed dimensions, compute (a) stress (b) strain (c) total deformation

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