DOUBLE-TRACK MECHANIZED BRIDGE Russian patent published in 2006 - IPC E01D15/12 

FIELD: bridge structures, particularly collapsible bridges adapted to span obstacles for transport passing in disaster-stricken zone and in area of military operations.

SUBSTANCE: bridge comprises two tracks connected by tie members and composed of at least two pivotally connected sections formed as welded frame box girders having upper and lower decks, side walls, transversal diaphragms, longitudinal stringers, longitudinal and transversal antiskid bars, fastening members of bridge expansion mechanism and bridge mounting mechanism members. Each stringer is made as U-shaped longitudinal beam having flange width of 0.05-0.15 from upper deck width and wall height of 0.025-0.075 from upper deck width. Side walls of each section are corrugated and fixedly secured by end edges to upper and lower decks. The corrugations are transversal to the decks.

EFFECT: increased bridge structure length, reduced weight thereof and increased safety and stability factor without load-bearing capacity reduction.

2 dwg