Does anyone have a recommendation for supporting a living room slide?

It's not recommended to use anything to support any of the slides, may even void your warranty. Are you having problems or trying to stop the movement?

Thanks for your reply, our concern is the weight we are placing in the chairs on one side , we are two large people.

No one has ever called me Tiny & we've been in ours fulltime for almost 4 years & NO problems. The kitchen slide is made the same way & it has all the heavy stuff on it, so don't worry & enjoy your RW.