The headboard and footboard come with a frame to which they are attached. The frame is made up of two siderails, each of which has two swing out crossarms which link with the crossarms from the other siderail. As the instructions clearly state "swing out the crossarms 90 degrees" and then engage them together.

The crossarms are the problem. One is fine on each rail. They swing out a full 90 degrees and even can swing out a bit more. However the other crossarms (one on each rail) do not swing out 90 degrees. They will go about 80 degrees or so and then are blocked by the steel rail. There is nothing that can be done to fix this. It is just terrible machine tooling and quality control. The result is a bed with a crazy angles funhouse shape and one end about a 1/2 inch wider than the other.

I called Wayfair and they will have new siderails w/ crossarms sent. But I am not confident the next ones will be any better.