UniStrut clamped to I beam for under chassis storage

I used unistrut under my frame for water tanks, and gasoline tank. They work great, but I welded 2"x3/8" straps with 3/8" holes in them to mount to. By the way, make sure you use Nylock nuts so you don't have to worry about them coming loose.

I would stay away from Beam Clamps. They probably won't work well with vibration.