I have a question about ledger boards. I am rebuilding a second floor to my old barn. It should be able to support car projects and parts/engines. I am going to use 20" tall x 6" wide steel I beams for a large span. I want to use 12" joists then for the floor. I wondered if I use a ledger board if I should use thicker than a 2x6. Say like maybe two 2x6 together so that more of the joist sits on the ledger. I want it to be really strong. The best would be to lay both joists on the I beam, but I don't want to give up 12 inches for this. I already am having to change the entrance slope 10" higher. The bolts holes for the ledger are already drilled. What do you guys say? Does a thicker ledger give any more strength? For supporting a lot of weight can I still use a ledger and get the same strength as joists lying across? Thanks for your responses in advance -Mike