Editing Engineering tolerance (section)

==Clearance (civil engineering)==
{{Main|Clearance (civil engineering)}}
In [[civil engineering]], '''clearance''' refers to the difference between the [[loading gauge]] and the [[structure gauge]] in the case of [[railroad car]]s or [[tram]]s, or the difference between the size of any [[vehicle]] and the width/height of doors, the width/height of an [[overpass]] or the [[diameter]] of a [[tunnel]] as well as the [[air draft]] under a [[bridge]], the width of a [[Lock (water navigation)|lock]] or diameter of a tunnel in the case of [[watercraft]]. In addition there is the difference between the [[Draft (hull)|deep draft]] and the [[stream bed]] or [[sea bed]] of a [[waterway]].