Steel Erection by Crane Quiz
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Questions and Answers

What is a key requirement for erection by crane?

  • Large number of equipment on site
  • Good accessibility around and on the site (correct)
  • Suitability for high-rise buildings
  • High level of labor required

    • What must the designer ensure for the steelwork elements during handling and transportation?

  • Resistance to wind forces only
  • Resistance to seismic forces only
  • Resistance to global forces
  • Resistance to local forces (correct)

    • When is temporary support (falsework) required for erection by crane?

  • When there is good accessibility on the site
  • When the bridge is less than 15m above ground (correct)
  • In case of heavy lifting equipment availability
  • When the steelwork elements are lightweight

    • What can happen if the steel beams are temporarily fixed to the abutment during the erection process?

    <p>The piers will experience bending moments that exceed those when the bridge is in service</p> Signup and view all the answers

    Why can the erection of the steel structure by crane result in significant stressing of the piers?

    <p>The variation in temperature causes lengthening or shortening of the steel beams</p> Signup and view all the answers

    In the final state, how are the beams fixed to the central piers?

    <p>They are fixed permanently to ensure stability</p> Signup and view all the answers

    Why are the bearings at the abutments made moving bearings in the final state?

    <p>To accommodate movement of the steel structure due to temperature changes</p> Signup and view all the answers

    How can leaving the bearings between the beams and piers temporarily free to move during erection help avoid stressing the piers?

    <p>It allows for lengthening and shortening of the beams due to temperature variation</p> Signup and view all the answers

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