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Q: Which of the following is NOT a disadvantage of using rods and bars as a tension member of steel structures?
  • A. Inadequate stiffness
  • B. High slenderness ratio
  • C. Sag under own weight
  • D. Tensile strength
Correct Answer: Option D - A tension member is the one which is intended to resist axial tension. Tension members are also called ties or hangers. Type of tension members– • Wires and cables • Rods and bars • Single structural shapes • Built up sections. Rods and bars–Members carrying tensile force of small magnitude may be made from hot-rolled square or round rods or of flat bars. Round bars are threaded at the ends and are used with nuts. The major disadvantage of these sections is the inadequate stiffness resulting in noticeable sag under their own weight, specially during erection and high slenderness ratio.
D. A tension member is the one which is intended to resist axial tension. Tension members are also called ties or hangers. Type of tension members– • Wires and cables • Rods and bars • Single structural shapes • Built up sections. Rods and bars–Members carrying tensile force of small magnitude may be made from hot-rolled square or round rods or of flat bars. Round bars are threaded at the ends and are used with nuts. The major disadvantage of these sections is the inadequate stiffness resulting in noticeable sag under their own weight, specially during erection and high slenderness ratio.

Explanations:

A tension member is the one which is intended to resist axial tension. Tension members are also called ties or hangers. Type of tension members– • Wires and cables • Rods and bars • Single structural shapes • Built up sections. Rods and bars–Members carrying tensile force of small magnitude may be made from hot-rolled square or round rods or of flat bars. Round bars are threaded at the ends and are used with nuts. The major disadvantage of these sections is the inadequate stiffness resulting in noticeable sag under their own weight, specially during erection and high slenderness ratio.