I rebuilt the city pond hockey goals this summer. The old ones were more than a bit haggard. (Pics in the DIY Gear Repair/Restore thread)
...but after finishing them, I said to myself, "Self, you need a backyard hockey goal...and you should probably do a backyard rink this winter."
So I dug in my steel scrap pile and built the uprights/crossbar out of 2" SCH40 steel pipe (2 3/8" OD and almost 1/4" wall like the NHL goals--HEAVY!) and bent up the lower frame and top shelf. I made the lower frame only 28" deep instead of 40" deep--so it takes up less space in the yard.