Allowable working stress corresponding to the slenderness ratio of double angles

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Question
Allowable working stress corresponding to the slenderness ratio of double angles placed back to back and connected to one side of a gusset plate, is reduced to
Options
A. 50%
B. 60%
C. 70%
D. 80%
E. 40%

Correct Answer

80%

Steel Structure Design problems

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1. The maximum tensile and compressive bending stress in extreme fibres of rolled I-sections and channels on the effective section, is
Options
A. 1500 kg/cm²
B. 1420 kg/cm²
C. 1650 kg/cm²
D. 2285 kg/cm²

3. Assuming the values of maximum deviation ?P and ?E to be 25% of the computed value of P and E respectively, the minimum value of the factor of safety is
Options
A. 1.00
B. 0.67
C. 1.67
D. 2.67
E. none of these.

4. If d is the distance between the flange angles, the vertical stiffeners in plate girders without horizontal stiffeners, are spaced at a distance not less than
Options
A. 0.15 d
B. 0.22 d
C. 0.33 d
D. 0.44 d

6. On eccentrically loaded columns, the equivalent axial load may be obtained by
Options
A. adding the axial load, eccentric load, the product of the bending moment due to eccentric load and the appropriate bending factor
B. adding the axial load and eccentric load and subtracting the product of bending moment and appropriate bending factor
C. dividing the sum of axial load and eccentric load by the product of the bending moment and appropirate bending factor
D. none of these.

8. The effective length of a double angle strut with angles placed back to back and connected to both the sides of a gusset plate, by not less than two rivets, is
Options
A. 0.5 L
B. 0.67 L
C. 0.85 L
D. L
E. 2 L

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