Hi MF,
G'day Gadge and mich,
I used to have foot long piece of track. Man they're heavy. I would hate to drop that on my foot!!
Yep, the standard 'critical measurement' for conventional railway rails; is the weight in pounds, per yard of length.
Older branch lines in Vic were 50-70 lb/yd; mainlines could be up to 130 lb/yd rails.
It's all spelled out in most of the Vic Railways 'Track Charts' at this link!
https://www.victorianrailways.net/grades/gradehome.html