This twin wooden bed frame keeps a second sleeping surface tucked underneath until it is needed. The trundle rolls out on wheels and stops against built-in blocks, so it lands square instead of running past the frame or hitting a wall. Wooden slats over a solid wood frame and support legs rate both the main bed and the trundle at 200 lbs each. The main deck takes a mattress 6 in thick or more, while the trundle is sized for a 4-in or 5-in mattress, and neither needs a box spring. An 18-in footboard closes the foot end. Assembly is required.