Dear Douglas,
I'll talk to our fabricator about making them longer. Or you could place several of them along the edge of the fan. That is place 3 or 4 of them along 24 to 36" wide fan curb.
If you got 2 kits, you'd have 2 chains and 4 hinges. Each hinge is approx. 6 inches long. Space the hinges evenly along one edge and you'd accomplish about the same as one long hinge.
The 2 plates are about 1/4" apart (don't have it in front of me to measure). The backing plate isn't threaded, the screws pinch the edge of the fan between the 2 plates with the 2 bolts. The locking nuts screw down and prevent the bolts from backing out.
The hinges are designed so that they only tip to about 110 degrees even without the chains. Although on your larger fans you'd definitely want the chains.
This is actually a hinge that we found and liked, but when we went to buy them the guy had gone out of business and folded up. So all we had was the prototype and have started fabricating them ourselves since we liked it so much.
What we like about it is how easy it is to install. No drilling pilot holes and fooling around in the dark with nuts and bolts. Just tap it in place, tighten the two bolts and two lock nuts. Use the good ol' Dewalt and sink the self tapping screws.
We installed the kit above on that fan in about 5 min and we were stopping to take pictures.
On tight fitting fans, you'll have to apply a little hammer action to make a little clearance for the edge to slide up underneath the lip.
It doesn't work on every fan, but on the ones that it does work it's cheap, easy and efficient.
Rusty