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701_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

# 701_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

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SECTION 8.5 Combined Loadings 695 Solution 8.5-17 P IPE : d 2 10.5 in. d 1 8.5 in. A 29.845 in. 2 I 340.421 in. 4 I p 2 I I p 680.842 in. 4 Q 45.292 in. 3 W 1 4000 lb S IGN : A s (8)(3) ft 2 Area A s 24 ft 2 Height from the base to the center of gravity of the sign Horizontal distance from the center of gravity of the sign to the axis of the pipe b 53.25 in. W 2 500 lb W IND PRESSURE P p w A s P 840 lb S TRESS RESULTANTS AT THE BASE M Ph M 4.082 10 5 lb in. T Pb T 4.473 10 4 lb in. V P V 840 lb N z W 1 W 2 N z 4.5 10 3 lb # # p w 35 lb/ft 2 b a (4)12 + 10.5 2 b in. h a 42 3 2 b ft Q 1 12 1 d 2 3 d 1 3 2 I p 64 1 d 2 4 d 1 4 2 A p 4 1 d 2 2 d 1 2 2 c d 2 2 (a) S TRESSES AT POINT A (b) M AXIMUM S TRESSES AT POINT A Max. tensile stress Max. compressive stress Max. shear stress

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