A couple of years ago we bought a solid oak bed. Instead of the side rails just dropping into brackets on the head and foot boards they are through bolted into embedded nut plates in the side rails. And instead of the cross boards on the head and foot boards just being mortised and glued in they also are through bolted. This bed is super solid and have never had a squeak or rattle yet. Oh, and the half moon shaped cutouts where the cross boards join the uprights have come in REAL handy also! *Evil Grin*