Re: Need some leads

I did some checking, starting with AISC "Manual of Steel Construction" for crane rail. They only go down to 30 pound per yard, which is 3.125 in high.

Next, live steam at 14 inch gauge, which is 1 inch high for 14" gauge.

Next, amusement parks, and, bingo. They appear to go as low as 12 or 16 pound per yard, which, per the link bcp provided, is 2 or 2.375 inches high, respectively, by ASCE standards.

So, if you are planning to build a three foot qauge 0-4-0, your first stop should be to get heavier rail. It should work just fine for 14" live steam, but it will be hard to bend.

There is a whole community out there, start with them.