Re: What lb rail is used on...

Biggest laugh for the morning.
So trains will not bend the rail and develop low joints. Luckily the steam engine has equalized suspension which spreads out all the weight over the entire wheel base, much better than having all the weight in two short wheel bases of a dismal. The lighter weight on twenty wheels is better than on eight.

That makes me remember working with 155# rail where we had it in some yard tracks and it was so strong only 4 ties per rail could hold it up and you will never bend it even with 110 ton cars. It always tripped you with the extra inches height. That rail would handle car twice what they were ever built to weight, but the pattern of rail head shelling of the surface metal of any rails under heavy axle loading began to limit the weight of cars and its axle loading. Therefore, the 140# per yard became the upper limit of rail size.