Graphical Construction Glossary >> Temporary Work. >> formwork >> Timber Props

Timber Props

Vertical timber supports, posts or shores.

Formwork Cleat or Scab

Short lengths of timber or steel used to join other members together.

Fox wedges, Folding Wedges

Pairs of timber wedges used for adjusting props and many other wedging and tightening operations.

Props made of timber are vertical members used to support formwork. Shown at the side is a prop with a head fixed to it for a beam support.

In common with all types of props they should follow these simple rules.

• They should be strong enough and enough of them to do the job with a large factor of safety. The old saying "better ten too many than one not enough" applies to all formwork supports but more so to props.
• They must be vertical.
• They must be fixed in some way top and bottom to stop movement.
• They must have something to spread the load, top and bottom.
• Slender props or tall props should be braced at the middle. Preferably in groups.
• They should have room for adjustment, shown here is the traditional way of using fox wedges.

For non glossary articles of a general and how to nature go to the formwork section on this site.

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Adam Smith 1723-1790

"When we build, let us think that we build for ever."John Ruskin 1819-1900