Variable Amplitude Segment lifters are designed to install segments that weigh between 200t and 1200t, In varied design configurations like ramps, in tight locations, or in areas that are generally difficult to access. Segment lifters are constructed from steelwork, however a segment lifter is not required to span from one pier to the next and consequently it does not contain as much steel as the launching truss. A segment lifter is much easier to construct than a launching truss and is more versatile. Two segment lifters work in tandem with its mirror equivalent, with one lifter erecting in one direction from the pier and the second lifter erecting in parallel in the opposite direction. For both the segment lifters and the launching truss, the elevated road is required to be constructed evenly from both sides of the pier. This is termed a balanced cantilever design, which places either side of the pier (balanced) to ensure they are not eccentrically overloaded. Segment Lifter (referred to as bridge deck crane for pre-cast segment balanced cantilever construction) is mainly used for assembling construction of roads, cross river cross sea steel box beam of cable-stayed bridge, the equipment is installed on the bridge deck, and accurately and safely lift the steel box girder section from sea beam transport ship (or steel trestle bridge) to the bridge deck for assembling and welding, and it can also be used to hoist for other beam block or steel girder. It is mainly divided into fixed deck crane, luffing deck crane and tower type deck crane and its derivatives products "shore crane" Segment lifter also called bridge builder or Lifting frame, mainly adopts balance cantilever construction method for precast segment bridge construction and widely used in cable-stayed bridge. ZHONGJIAN has developed several types of Segment Lifter system tailored for the various erection requirements of pre-cast segmental viaduct. The technology has been used successfully to complete several large balanced cantilever bridges worldwide. The lifter is fitted with electric winches or strand jacks system and is launched forward by hydraulic system. The lifter can also be equipped with steel wheel/rails or rubber tyre mounted for increased mobility.
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