update! Not wood at all and is pressed board! Little board that is on side boards can not hold any weight because side boards is pressed wood. I weigh about 165lb and am the only one sleeping in bed. Came apart n will not support mattress. So lasted 6 months and ready for garbage can!!!!
first review:  It is a little strange since weight of mattress makes the middle legs come into contact with floor. The 4 cross supports to me have to be screwed to frame, screws are provided but bed frame is not marked or predrilled for screws. Kinda of important so screws do not split wood. Scratches easy but at least it is wood and can be touched up easy. If I did not need it to sleep I would coat it with a polyurethane.