This metal bunk bed stacks a twin over a full, so a child sleeps up top while a teen or adult takes the wider lower bed. The upper bunk is rated for 330-lb and the lower for 440-lb, riding on twenty-one powder-coated slats per deck. Full-length guardrails stand 10-in tall around the top, and an integrated ladder is built into the frame for easy and safe access. Fit a 3-in to 4-in mattress above and an 8-in to 10-in mattress below. Foam at the joints stops squeaking, and 11.5-in of clearance underneath holds storage bins.