Step 4: All Together Now
Attach two corner braces/feet to each long side with three 1/4" lag bolts. I popped a little drywall screw in each brace just to hold it while I got the other three into place. Stand up the short ends of the bed and get them attached to one side. Roll the frame down so the feet are sticking up in the air and attach the last side.
Pilot hole and countersink two 1/2" lag bolts through the ends of the two short sides and into the end grain of the long sides. Remember, the countersink hole needs to be bigger than the diameter of the socket that turns the bolt head, not the bolt head. Ratchet in the lags. As you can see in the one picture, you can screw a temporary block into the backside of the frame to have something to clamp against to pull this sides into line.