EBK MECHANICS OF MATERIALS
7th Edition
ISBN: 9780100257061
Author: BEER
Publisher: YUZU
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Chapter 10.3, Problem 78P
A column of 22.5-ft effective length must carry a centric load of 288 kips. Using allowable stress design, select the wide-flange shape of 14-in. nominal depth that should be used. Use σY = 50 ksi and E = 29 × 106 psi.
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Pr
A column of 6.7-m effective length is obtained by connecting four L89 x 89 x 9.5-mm steel angles with lacing bars as shown. Using
allowable stress design, determine the allowable centric load for the column. Use oy= 345 MPa and E= 200 GPa. Neglect the effect
of the lacing bars on the moment of inertia. (Round the final answer to the nearest whole number.)
| 89 mm
mm
The allowable centric load is
kN.
A pin-connected truss is loaded and supported as shown. Each aluminum member has a cross-sectional area of A = 3.7 in.². Assume a =
3.25 ft and b = 3.90 ft. If the normal stress in each member must not exceed 35 ksi, determine the maximum load Pmax that may be
supported by the structure.
A
B
b
b
Answer: Pmax=
kips
Chapter 10 Solutions
EBK MECHANICS OF MATERIALS
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