Here is an autocad dwg file for 3d view of a bridge. a structure carrying a road, path, railway, etc. across a river, road, or other obstacle.
section drawing of wall bl
Construction view of dam d
Contention wall details
Staircase and several cons
Hatch plan and section aut
Expansion joint section de
Semi-circular Staircase se
Screw plan and section aut
Girder beam and column det
Foundation of staircase de
Sky light design drawing
Wall section plan layout f