Adjustable screw jacks come in two main forms: the base jack and the U-head jack. They work together at opposite ends of a scaffold or shoring leg.
Base jack
A base jack (base plate jack) goes at the bottom of a standard or shoring leg. Its flat plate spreads load onto the ground or sole board, and the thread levels the frame on uneven surfaces.
U-head jack
A U-head jack (fork head) sits at the top. Its U-shaped cradle holds a timber bearer or steel beam, and the thread fine-tunes the height of the slab formwork above.
Using them together
- Base jack levels the system on the ground
- Standards or props carry the load between
- U-head jack sets the final formwork height
We supply both solid and hollow screw jacks in standard and custom lengths. Send your load and adjustment range for a quote.
