Not anything in particular, I was hoping for some 'common' information. Or possibly the word that I disdain when reading model railroading magazines 'Typical'.
I guess if I had to pick something, then I'd choose Colorado narrow gauges. D&RGW, C&S, C&T.
I've never visited out there, so even a 'this is what they do now' would be fine.
At a RR museum I volunteer at, we're building a new siding. 85# rail, most of it is 33ft long, with regular 7"x9"x8.5' ties on 24" centers.
I've seen photos from an amusement park narrow gauge which used regular ties, and had the large portion overhanging. I've seen amusement park 'rides' which resemble trains, they were 24" gauge, with what looked like 4x4's as ties. Those seemed to be 32"-36" centers.
Just looking for standard practices.