How many feet do you think I'd need per string? I found an online site selling the same grade/size chains for $7.68 per foot with free shipping over $79. For the price of BWTG ($92), I'd be able to get 12' of chain for the same price. I'm thinking I could bump that up to 16' for 2 sets of 4' chains. Should they be longer or shorter?
I also found a site that sells bulk. BIG bulk! Like 2000' of 1/4" chain in drums. Useless for our purposes, but for 5/8" grade 30 coil chain they have 150' for $5.38 per foot ($807) and free freight. They also have 75' for $6.91 per foot ($519). Something to think about if someone was..., say..., starting a gym or something.

The PVC is 1 1/2 inch SCH 40 and hold pretty good at 70lbs. Buy the chains from blackwidowtraining out of NJ. Around $85 including shipping.
Damn that is some fat chains! I was going to pick some chain up at a hardware store, but i don't think they have that size. I think 5/8" was the thickest they had.
That bamboo bar looks fun and scary all at once. Especially doing JMs! How's the PVC hold up? Is it regular sched-40 or 80?