Design of steel structures

1. The range of economical spacing of trusses varies from A. $$\frac{{\text{L}}}{3}$$ to $$\frac{{\text{L}}}{5}$$ B. $$\frac{{\text{L}}}{4}$$ to $$\frac{{2{\text{L}}}}{5}$$ C. $$\frac{{\text{L}}}{3}$$ to $$\frac{{\text{L}}}{2}$$ D. $$\frac{{2{\text{L}}}}{5}$$ to $$\frac{{3{\text{L}}}}{5}$$ where L is span

$$rac{{ ext{L}}}{3}$$ to $$rac{{ ext{L}}}{5}$$
$$rac{{ ext{L}}}{4}$$ to $$rac{{2{ ext{L}}}}{5}$$
$$rac{{ ext{L}}}{3}$$ to $$rac{{ ext{L}}}{2}$$
$$rac{{2{ ext{L}}}}{5}$$ to $$rac{{3{ ext{L}}}}{5}$$ where L is span

Detailed SolutionThe range of economical spacing of trusses varies from A. $$\frac{{\text{L}}}{3}$$ to $$\frac{{\text{L}}}{5}$$ B. $$\frac{{\text{L}}}{4}$$ to $$\frac{{2{\text{L}}}}{5}$$ C. $$\frac{{\text{L}}}{3}$$ to $$\frac{{\text{L}}}{2}$$ D. $$\frac{{2{\text{L}}}}{5}$$ to $$\frac{{3{\text{L}}}}{5}$$ where L is span

4. Horizontal stiffener in a plate girder is provided to safeguard against A. Shear buckling of web plate B. Compression buckling of web plate C. Yielding D. All of the above

Shear buckling of web plate
Compression buckling of web plate
Yielding
All of the above

Detailed SolutionHorizontal stiffener in a plate girder is provided to safeguard against A. Shear buckling of web plate B. Compression buckling of web plate C. Yielding D. All of the above

5. Shape factor is a property which depends A. Only on the ultimate stress of the material B. Only on the yield stress of the material C. Only on the geometry of the section D. Both on the yield stress and ultimate stress of material

Only on the ultimate stress of the material
Only on the yield stress of the material
Only on the geometry of the section
Both on the yield stress and ultimate stress of material

Detailed SolutionShape factor is a property which depends A. Only on the ultimate stress of the material B. Only on the yield stress of the material C. Only on the geometry of the section D. Both on the yield stress and ultimate stress of material

8. Shear buckling of web in a plate girder is prevented by using A. Vertical intermediate stiffener B. Horizontal stiffener at neutral axis C. Bearing stiffener D. None of the above

Vertical intermediate stiffener
Horizontal stiffener at neutral axis
Bearing stiffener
None of the above

Detailed SolutionShear buckling of web in a plate girder is prevented by using A. Vertical intermediate stiffener B. Horizontal stiffener at neutral axis C. Bearing stiffener D. None of the above

10. In a gusseted base, when the end of the column is machined for complete bearing on the base plate, then the axial load is assumed to be transferred to base plate A. Fully by direct bearing B. Fully through fastenings C. 50% by direct bearing and 50% through fastenings D. 75% by direct bearing and 25% through fastenings

Fully by direct bearing
Fully through fastenings
50% by direct bearing and 50% through fastenings
75% by direct bearing and 25% through fastenings

Detailed SolutionIn a gusseted base, when the end of the column is machined for complete bearing on the base plate, then the axial load is assumed to be transferred to base plate A. Fully by direct bearing B. Fully through fastenings C. 50% by direct bearing and 50% through fastenings D. 75% by direct bearing and 25% through fastenings

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