I wouldn't call what we have as frames. There is a front facade that has three roll-up doors with bins inside. Then there are about five aluminum rectangular slats that bridge between the wall and the front facade. Two are hinged so that the plywood top can be lifted to allow access.
The bed in the picture I stretched to make it a full width twin, the other side is the 34" wide AS size.
The make mattresses now with inner springs, we purchased two and will open up the sewn seam and change the shape to a curve. The inner springs make this possible since they are not connected to the adjacent springs.
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