railroad rails are not considered good for structural purposes like this.
Every time a train wheel rolls over them, they get strain hardened making
the rail very brittle.

--
don paolino
"SteveB" wrote in message
...

"Ignoramus31218" wrote in message
news
On 2008-02-04, Mechanical Magic wrote:
On Feb 4, 12:30 am, anderson2624
m wrote:

Is this frame as strong as "typical" or stronger.

6" C channel @13#/ft is ~20% stronger than 4" x 1/2" wall at 23#/ft.

4" by 1/2" wall tubing is a little bit heavy...

i

A "little"? That would be as heavy as 5" drill pipe. Why not just use
SOLID? Or railroad rails?

Steve ;-)