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Falsework includes temporary support structures for formwork used to mold concrete [1] in the construction of buildings, bridges, and elevated roadways. The British Standards of practice for falsework, BS 5975:2008, defines falsework as "Any temporary structure used to support a permanent structure while it is not self-supporting."
Formwork is molds into which concrete or similar materials are either precast or cast-in-place. In the context of concrete construction, the falsework supports the shuttering molds. In specialty applications formwork may be permanently incorporated into the final structure, adding insulation or helping reinforce the finished structure.
Centring [1], centre [2], centering [3] [4], or center [5] is a type of falsework: the temporary structure upon which the stones of an arch or vault are laid during construction. Until the keystone is inserted an arch has no strength and needs the centring to keep the voussoirs in their correct relative positions.
Shoring is designed to prevent collapse where shielding is only designed to protect workers when collapses occur. Concrete-structure and stone-building shoring, in these cases also referred to as falsework, provides temporary support until the concrete becomes hard and achieves the desired strength to support loads.
It expanded rapidly in formwork and scaffolding under GKN ownership in the end of the 1980s. [2] In June 2000, GKN Kwikform merged with RMD (Rapid Metal Developments, established in 1948), the formwork and scaffolding unit of RM Douglas (part of Tilbury Douglas), to form RMD Kwikform. [3] [1] Tilbury Douglas renamed itself Interserve in 2001. [4]
Traditional formwork is fabricated using wood, but it can employ steel, glass fibre, reinforced plastics and other materials. [3] Formwork for beams takes the form of a box that is supported and propped in the correct position and level. The removal time for the formwork will vary with air temperature, humidity and consequent curing rate.
A wooden deck was then erected atop the falsework to support the lowest forming surface. Reinforcing for the lowest surface of the box structure was then added, and the concrete was poured. During the initial pour, reinforcing and formwork for interior shear beams and any included tendon conduits were added. Later, another concrete pour was ...
Doka is an international producer and supplier of formwork and scaffolding used in all fields of the construction sector. It is a branch of the Umdasch Group AG based in Amstetten, Austria. Doka has a worldwide workforce of ~9,000, with 180 branches in 58 countries. [1]