Definition: Rail loading gauge
United Nations terminology
The profile through which a rail vehicle and its loads (wagons - ITUs) must pass, taking into account tunnels and track-side obstacles.
There are 4 basic gauges recognised by UIC: international gauge, A, B and C gauge.
These gauges are indicated for individual lines.
In principle, the smallest loading gauge may not be exceeded throughout the transport journey. Restrictions regarding the width and height of the load in curves have to be taken
Combined transport consignments often exceed loading gauges A and B. Another gauge of particular significance for combined transport is the B+ Gauge. There are also
many other gauge codes (P/C/S/...) recognised.
Terminology on combined transport, UNECE/ECMT/EC, UNITED NATIONS, New York and Geneva, 2001