BENCH & BED
When in bench mode, the two small cushions are the backrest while a large cushion is the bottom support.
When switched to bed mode, a platform mounted on heavy duty drawer slides pulls out to double in size. The bed is almost the size of a queen.
Technical Details: the bench is made from ¾” 5 ply birch plywood and pine framing. The slide is 28 x 69” supported by 28” 500 lb. rated drawer slides on each end. This places quite a bit of torsion on the side walls of the bench, so the sides are made of 2.25” thick birch plywood.
Here's the schematic of how the bench turns into the bed.
The top of the bench folds up and the bed comes up and out from underneath.