- railroad track having the standard width of 56.5 inches
- For standard gauge the measurement points are 1500 mm apart.
- Vehicle track interaction and gauging, Wheelset dimensions and tolerances for standard gauge
- The gauge of trains designed for running on lines of the Ireland and Northern Ireland networks shall be compatible with the Irish standard structure gauge.
- The minimum structure gauge to be used on the lines in Ireland and Northern Ireland is the IRL1 Irish standard structure gauge.
- The maximum and minimum dimensions for wheels for standard track gauge (1435 mm) are given in Annex M.
- The maximum and minimum dimensions for wheelsets and wheels for standard gauge will be given in the Freight wagons TSI.
- The maximum and minimum dimensions for wheelsets and wheels for Standard Gauge are given in Annex E.
- The maximum and minimum dimensions for wheelsets for standard track gauge (1435 mm) are given in Annex M.
- It shall be possible for the wagons to run through curve of 60 m radius for flat wagons and 75 m for other types on standard-gauge track and through curves of 120 m on broad-gauge track.
- Below 1100 mm ARL, the fixed infrastructure gauge defined in Railway Group Standard GC/RT5212 (Issue 1, February 2003) shall be applied.
- On electrified lines of the Irish and Northern Irish networks, the IRL1 Irish standard structure gauge and the necessary clearances define the nominal contact wire height.
- All performance levels and specifications of the present TSI are given for lines built with the standard European track gauge, as defined in Point 4.2.2 for lines complying with the present TSI.
- The height of the pivoting centre shall be 925 mm above rail level and the radius of the pivoting bearing shall be 190 mm as for the standard-gauge bogie.
- The height of the pivoting centre shall be 925 mm above rail level and the radius of the pivoting bearing shall be 190 mm as for the standard-gauge bogie. The pivot shall comply with the drawing in Annex X Plate 8. Axle box for wagon bogies.
- The test conditions applicable for bogies running on standard gauge track under normal conditions of speed and track quality are defined in Annex J. They represent only the common part of the full range of tests to be performed on all types of bogie frames.