Firebird,
You can always look while you're in the game by looking at the arena settings of the arena you are in. Bring up the clipboard, then click on options>arena setup>objects>object settings. 1=1,000lbs. So, a hanger is 2.7=2,700lbs, but 3,000lbs would be better. FLS gave you a good lead for a list. I'm not sure all of them are correct, but you can check them against the arena settings to be sure. Usually, all the Malee arenas have the same settings. If you would like maps of all object locations and some other helpful information, send me a private message with your e-mail address and I will be happy to send them to you. If you see me in the game, I will gladly give you help with anything you may have a problem with.
Cheers, One-eye