DISMOUNTABLE METAL BRIDGE Russian patent published in 2013 - IPC E01D15/133 

FIELD: construction.

SUBSTANCE: dismountable metal bridge includes two main trusses of lattice type. Each truss is made of linear and planar elements connected by means of eyes and pins. Cross beams are fixed to lower belts of main trusses, where a carriage way is arranged in the form of a longitudinal plank floor. The novelty in the dismountable metal bridge is the fact that cross beams are fixed to main trusses with the help of eyes and pins at the bottom. At the same time the upper plane of the longitudinal plank floor is arranged below lower eyes of main trusses. Besides, main trusses jointly with cross beams and longitudinal plank floor form a dismountable metal bridge with roadway below. As this bridge is transformed into the dismountable metal bridge of higher load-carrying capacity with roadway above by application of additional main trusses, the specified cross beams with a longitudinal plank floor serve as scaffolding to assemble additional main trusses and ties between them.

EFFECT: using the proposed device will make it possible to reduce labour intensiveness of assembly operations of a dismountable metal bridge and provide for the possibility of its transformation into a bridge of another load-carrying capacity.

1 cl, 18 dwg