Falsework

Falsework is a system of temporary supports used in construction to hold formwork and loads until a structure can carry those loads itself. It is distinct from formwork, which shapes the concrete, while falsework provides the temporary support for that formwork and other construction loads during construction or repair.

Typical components include vertical props or posts, horizontal transoms, braces, and ties. In arch and vault construction the term centering is sometimes used for the falsework that supports the arch during shaping and is removed once the keystone and surrounding concrete gain strength. The arrangement creates defined load paths and adequate stability, with removal scheduled only after safety criteria and strength criteria are met.

Falsework is employed in a variety of applications, such as concrete slabs and beams, arches and bridges, towers, and building repairs. It may be used alone or in combination with other temporary supports like shoring. The design and configuration depend on factors such as loads from plaster or concrete, weather, construction sequence, and the expected duration of support.

Safety and regulation are central to falsework practice. Structures must be planned by qualified engineers, designed to withstand both construction and environmental loads, and inspected regularly. Proper bracing, redundancy, and controlled removal sequences reduce the risk of collapse or damage. If removal is premature or inadequately performed, it can compromise the permanent structure and endanger workers.