I just hang them from a joist in the roof of my garage.

Bob

 That's a good looking set-up you have going there 4nthony.

Wish I could say the same about the rest of the garage! Shops are always a work in progress, right?

Absolutely. I'm sort of in the planning stages of some rearrangement of mine right now. I think I'm going to add some more parallel clamps horizontally, around the base of my main assembly table.

You have a pretty good collection of Woodpeckers squares in there too.

I wrote a long detailed description of this but it did not post so here are pictures

My clamp rack evolved from a mobile sheet good lumber cart made from one 5x5' piece of 3/4" Baltic birch plywood. Sheet goods are on the front (along with a bunch of other wood), and clamps on the back. Not shown stored here are pipe clamps which are currently in use. In addition there's storage for Festool rails in several pockets on the end of the rack.

You’ve discovered the flaw in my design, which I failed to initially identify. Several weeks ago I was reorganizing my lumber storage and started by taking all the wood off the rack, which immediately fell over, surprising me, and making a mess in the process. As you accurately noticed the rack is inherently unstable without sufficient wood to counterbalance the weight of the clamps.

One solution would be to move the rack closer to the center of the platform, but that would decrease wood storage capacity. When I designed and built the rack it was simply for lumber storage, and was movable because I’m still in the process of building my workshop, and was tired of having to move the wood around. While unpacking tools I was also looking for a place to temporarily store clamps, and the backside of the rack was a perfect location.

In the long term I’ll build a wall mounted clamp rack to provide more capacity, after all are there ever enough clamps? I still haven’t decided if the rack will also be fixed or mobile. One advantage of mobility is I can move the rack into the garage to offload material from the car to rack, then roll the rack into the workshop.

I've got a piece of steel plate that I dug out of the ground when we were building the house that'd work perfectly as a counter weight, about 70 pounds. Thanks for the advice!