Cameron Twin Trundle Bed, $800. Mortise and tenon joinery. Not sure about the color. Trundle can convert to a three-bay storage unit. I do not like the curvature on the cross braces on the headboard and footboard! 42" tall. 180 pounds. Upper bed can accommodate an extra long mattress, which means there will be a 4" gap if we use a standard mattress. Does it roll out on wheels? What do the mattresses rest upon: slats or platforms ?