search google maps, and the phone book for (as blue said) "steel supply", "metal supply", or "steel yard". you can also go to local welding shop(s) and ask them were they get steel from.
Check out any place that fab stuff because many times they will sell you steel for cheap... Stay away from fastenal at all cost because they charge you per inch at some really big price..
Go to a welding shop if you go to a hardware store you get ripped off. I went to a local welding shop and i bought 30 feet of 1 by 1 1/8 thick and paid $25. Hope this helped brett
On of the funnier moments of enlightenment on this site! I though it was common knowledge that HD not only asked too much, but wanted your lunch money too.