It's a steel frame with slightly arched ash slats, similar to Scandinavian bed frames. My concern is whether the leg attachments are strong enough. They don't have any gusseting or bracing. That's one reason I'll build head and foot boards. They can stabilize the bed and keep the legs from folding at the joints. As far as straight down load bearing capacity goes, it's over 500 lbs, if I recall correctly.