The weight rating is the total amount spread out across the table, I don't think it's the weight rating of each leg of the table. When dealing with boiling water, go way over kill. If it did dump, the medical bills would cost a lot more. Find a friend with a mig welder and show up with steaks and beer, and all the tubing cut to size. Most tubing suppliers will also cut the tubing, then you just have to MIG it in place. Harbor fright sells cheap flux (no gas) "MIG" welders.