The Institution of Structural Engineers-Operation and maintenance of bridge access gantries and runways. 2nd edition
Introduction
Bridge access gantries provide a particular solution to the problems of servicing the underside of bridge. They can be integral to a bridge from the outset or be devised to undertake a specific major strengthening or protective treatment project. They comprise moving carriages mounted on tracks or runway beams, permanently attached to the structure, with access systems to reach them from deck level or the substructures. Bridges can generally remain open to traffic whilst gantries are in use.
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