I used 2 L-bracket,angle iron or Or the predrilled angle tubeing spacing is about 1/2 inch apart.20 chains about 8links each,with s hooks to hold or bolts,I the chain is 1/4.thick I inter weaved a smaller chain throw the bigger chain for added weight. and use a bungee to hold up the links while loading and unloading from job sight.The guy from lowes hated me after ward from cutting 20 peices of chain.but he was a good sport about it!