Prop is a main part in Formwork project, a complete set of steel prop consists of an inner tube, an outer tube, a prop nut, a Jack plate and a base plate. it can be adjusted to any length inside its range. Shoring props are known by several names including: scaffolding prop, formwork prop, industrial prop, building prop, shore prop, acro prop, acro jack, acrow prop and post shores. They are height adjustable by a wide diameter screw thread, which is on the outside of the tube. The use of a screw thread means that the props are able to be tightened when already in place, which allows the user to adjust the load that each one bears. The sizes are from 1500mm to 5000mm with working bearing load limits from 20kN to 30kN.
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