02 · Scaffolding & Props

Adjustable Steel Props

Also called Props · Shoring · Acrow props · Jacks · Shoring posts

Adjustable steel posts that temporarily hold up slabs, beams and walls until the permanent structure can carry the load.

Manual / non-powered
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Overview

Adjustable steel props are temporary columns. They carry the weight of a slab, beam or wall for as long as the permanent structure cannot — while concrete cures, while a wall comes out, or while a repair is made.

Supporting slab and beam formwork while concrete cures, temporary support when removing walls or fitting lintels, and propping during structural repairs.

Spacing and layout come from the engineer or the formwork designer, not from judgement on the day. Props are a structural element, and where they go is part of the design.

Set every prop plumb, because a leaning prop loses a large part of its capacity, and use only the correct prop pin. Rebar or a bolt dropped through the hole will shear.

Catalogue specifications

  • ALLOWABLE LOAD IN POUNDS (LBS)
  • 8350 @ 7'
  • 7900 @ 8'
  • 7400 @ 9'
  • 6800 @ 10'
  • 6591 @ 11'
  • SPECIFICATIONS
  • LENGTH 6' 6" - 11'
  • EXTERNAL TUBE 2-3/8" X 0.118"
  • INTERNAL TUBE 1.91" X 0.14"
  • WEIGHT 41LBS

Best uses

  • Supporting slab and beam formwork while concrete cures
  • Temporary support when removing walls or fitting lintels
  • Propping during structural repairs

Troubleshooting

Collar won't turn

Checks to try, in order

  1. Clean dried concrete off the thread with a wire brush.
  2. Apply a light oil to the thread.
  3. Take the load off first — never force the collar while it's carrying weight.

Reference draft — always follow the manufacturer’s manual.

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Prop is settling or sinking

Checks to try, in order

  1. Place a timber sole plate or pad under the base plate on soft ground.
  2. Re-check the prop is plumb and re-tighten.

Reference draft — always follow the manufacturer’s manual.

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Safety

  • Never remove props until the engineer or supervisor confirms the concrete has reached strength.
  • Bent inner or outer tubes mean the prop is out of service.

For manual / non-powered

  • Inspect for damage before every use and never exceed the rated load.

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