
I have a captain's bed, which means it has a fixed base frame, not "under" the bed, it even protrudes a little over the mattress. This sleeper has spring loaded lower legs, I was able to attach it to the slats with straps and the lower legs fit snugly into the bed frame. The bunk "sits" about an inch from the bed frame and fits very snugly against the mattress with no gaps. I LOVE this bedside table!

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