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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."
The Bridge over the River Kwai (1952 novel) and its 1957 film adaptation The Bridge on the River Kwai: The building and destruction of the eponymous bridge form the basis of the plot. In the novel, the bridge is merely damaged; in the film, it is destroyed.
Several construction phases can be seen in this early 2011 image, from finished columns to falsework erection through formwork completion prior to concrete pouring. Left: Temporary double deck S-Curve (upper deck is westbound toward tunnel).
The beams and formwork are typically set by hand and pinned, clipped, or screwed together. The advantages of a modular system are: does not require a crane to place the formwork, speed of construction with unskilled labor, formwork modules can be removed after concrete sets leaving only beams in place prior to achieving design strength.
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]
In August 1972 the falsework that had supported the westbound carriageway deck pour was moved over to the eastbound carriageway. [1]: 113 The two structures were separated by a gap of just 2 feet 10 inches (0.86 m). [1]: 111 The falsework was dragged across on a temporary track. It was inspected and some defects were rectified before it was put ...
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.
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]