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815 Demolition Safety
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Pre-tensioned Members

Pre-tensioned members usually do not have any end anchors, the wires being embedded or bonded within the length of the member.

  • Demolish simple pre-tensioned beams and slabs of spans up to about 23 feet (7 meters) in a manner similar to ordinary reinforced concrete.
  • Lift and lower pre-tensioned beams and slabs to the ground as complete units after the removing composite concrete covering to tops and ends of the units.
  • Turn the members on their sides to facilitate breaking up.
  • Lift the structure from points near the ends of the units or from lifting point positions.
  • Whenever possible, reuse lifting eyes if they are in good condition.
  • When units are too large to be removed, consider temporary supporting arrangements.

Knowledge Check Choose the best answer for the question.

4-4. You should demolish simple pre-tensioned beams and slabs in a manner similar to ordinary reinforced concrete if they're width is under how many feet?