P aminohippurate clearance - vertaling naar
![Increasing the structure gauge for a larger loading gauge can involve substantial work. The UK's [[Midland Main Line]] being upgraded in 2014.](https://commons.wikimedia.org/wiki/Special:FilePath/2014 Replacement of New Road Bridge, Milton Ernest, Bedfordshire.png?width=200 "Increasing the structure gauge for a larger loading gauge can involve substantial work. The UK's [[Midland Main Line]] being upgraded in 2014.")
![A truck damaged by striking a railway bridge in [[Saltney]] in [[Cheshire]] in 2018](https://commons.wikimedia.org/wiki/Special:FilePath/Another bridge strike in Chester Street, Saltney (geograph 5852668).jpg?width=200 "A truck damaged by striking a railway bridge in [[Saltney]] in [[Cheshire]] in 2018")
![wayside objects]]hauteur libre = clear heightNiveau superieur des rails = Top of rails}}](https://commons.wikimedia.org/wiki/Special:FilePath/Gabarit-ferroviaire.svg?width=200 "wayside objects]]hauteur libre = clear heightNiveau superieur des rails = Top of rails}}")
![Calibration bridge in Germany, used to indicate the maximum height of [[vehicles]] on approaching a railway bridge](https://commons.wikimedia.org/wiki/Special:FilePath/Lichtraumprofilbrücke (001).JPG?width=200 "Calibration bridge in Germany, used to indicate the maximum height of [[vehicles]] on approaching a railway bridge")
Definitie
Wikipedia
A structure gauge, also called the minimum clearance outline, is a diagram or physical structure that sets limits to the extent that bridges, tunnels and other infrastructure can encroach on rail vehicles. It specifies the height and width of platforms, tunnels and bridges, and the width of the doors that allow access to a warehouse from a rail siding. Specifications may include the minimum distance from rail vehicles to railway platforms, buildings, electrical equipment boxes, signal equipment, third rails or supports for overhead lines.
A related but separate gauge is the loading gauge: a diagram or physical structure that defines the maximum height and width dimensions in railway vehicles and their loads. The difference between these two gauges is called the clearance. The specified amount of clearance makes allowance for wobbling of rail vehicles at speed or the shifting of vehicles on curves; consequently, in some circumstances a train may be permitted to go past a restricted clearance at very slow speed.
