Morris 91715 Morris Products 91715 I Beam Ground Clamp, Isolated From Beam, #8 - #4 Wire Range

If you get the item, it will be pretty obvious to you how the clamps clamp down on the beam and how the ground wire attaches

Using the grooved portion of the beam, you can secure skinned wire to it. Ideally, the two points should meet and the clamp should be forced to tighten properly so that the wire (on the beam side) makes good If you want to choose the right clamp, you must consider the wire size. Using C clamps and solid # 6, I bonded the frames of a double wide to each other to reduce ground variation in the ground. Rather than use a torque wrench, I used an ohm meter to check the continuity.

A clamp clamps around the conductor at the upper end. A clamp will clamp the conductors 12,10,8 if it is placed over them. In smaller wire sizes, such as 14,12,10, you can double the conductor by double backing the wire so it will fit into a 1/2 clamp.