Track centres for double and passing tracks

[Tisim]

What were the above, typically, on Irish lines circa 1900?

Was it the same as in England, where there is 6’ between the outer faces of the rails of adjacent track, and the centres are derived from this plus the track gauge and the width of two rail heads, or was it set wider?

Apologies if it has been asked before, but an extensive search here and elsewhere hasn’t turned anything up for me, other than discussion over Peco Streamline and Setrack centres.

I am talking about prototype dimensions, not model: I can work them out from the real thing.

[Mayner]

Minimum clearance between running lines appears to have been 6' as used in the UK, I have a MGWR Loading and Structural gauge apparently from the early 1900s that shows 6'25/8" between adjacent rail centers for double track & 2'4" between rail center and platform faces. 

 

[Tisim]

Thanks. Just add 6 ½ “ to the GB centres, then!

[StevieB]

Taking account of the 6.5” gauge difference, I use 20mm track centre to platform edge and 47mm track centre to track centre, if that makes sense.

Stephen