Doug1966
Well-Known Member
Hi. Yes they are spring assisted. 1 piece of chain attached to bottom of extension, then the spring , then another piece of chain, this one is attached to bottom of main bunk, usally a slot so spring tension can be adjusted. I attached some pictures of a set of bunks I made for 1/25 scale model. Gives you the idea how the set up works. Go to Arctic trailers web site, they have a parts cataloge, in there there are good pictures and drawings of the parts that go into the bunks.