My other chunk of RR track: This one is even smaller gauge (or whatever the sizing metric is) than the shaped track is. Only 4-1/4" tall 2" wide on top 4-1/8 or so on the bottom flat, and 4-3/4" long. 6-1/2 lbs, so right at 16-1/2 lbs per ft.
You can see where someone got serious on it on the near edge.
Got this a couple of years ago at a yard sale, and keep it on the bench for just beating on stuff. where there is no finesse needed.
The round disk was my dad's "anvil" for inside the house, or at least that is where I found it. a hair over 6" round.
I'd like to find about a foot of the heaviest track available for my "Power hammer" setup being made from an old 50's power nailer. It would be a good piece for that. I'll probably wind up getting just a stray chunk of steel for it. I used to have a much thicker disk than my dad's, about 4' thick and 8 or 10 wide. not sure what I ever did with it...