We recently replaced the mattress and box spring set on our full sized bed and discovered that new box spring was too flimsy that the whole set sagged in the middle. The 1x4 oak slats are positioned on the side rails with small wooden blocks glued and pegged to the side rail sills. I ended up gluing and screwing 1x4 center vertical pieces to each slat to support the center. We had two twin sized beds made by an Amish firm (Yutzy Woodworking) for our spare bedrooms and they have cast aluminum fixtures for joining the rails to the head board and foot board. They also have cast aluminum dovetail fittings screwed to the side rails to support the slats. The ends of the 1x3 slats are dovetailed and lock into the aluminum fittings. No central support as these are twin beds, but the supports would work for any size bed.
I've gone out to find myself. If I return before I get back, have me wait for me.
"Sawdust is Man Glitter"
Last edited by Jim Frye; 02-01-2018 at 11:50 AM.