Graphical Construction Glossary >> Temporary Work. >> formwork >> Strongback

Strongback

1.) In Stair Formwork. A timber or steel member sat on top of and bracing the riser forms in wide flights of concrete stairs.
2.) In Formwork. Any type of large stiffening member on the outside of formwork.
3.) In Tilt Slab Construction. Temporary steel or timber stiffeners as extra support to panels during erection. e.g. around openings or as legs to "L" shapes.

The photo above shows a flight of stairs about 3000 wide. The two beams sitting on top of the riser forms are supported at the top by a timber across the side forms. The beams have cleats that hold the risers up and also struts that stop the risers pushing horizontally outwards.

Note that they in turn are supported at the bottom by the existing concrete slab.

Above the guy on the left is steadying a tilt panel by holding the steel channel strongback.

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