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.
Typical floor drain detail
Details of an underground
Section elevation view of
Foundation plan and sectio
Footing plan detail dwg fi
Construction plan detail d
Detail of walls
Dwg file construction deta
Submuracion
Metal frame work for concr
Septic grave plan and sect
Tank detail plan and eleva