Cut the legs and arms to size, drill 1 1/2" pocket holes at one end of each of the leg pieces and attach them to the arms with 2 1/2" pocket hole screws and wood glue. Build 2 arm assemblies.
Cut the side runner to size, drill 1 1/2" pocket holes at both ends and attach it between the legs with 2 1/2" pocket hole screws and wood glue.
Cut the bottom runners to size and drill 1 1/2" pocket holes at both ends. Attach them at the bottom of each side with 2 1/2" pocket hole screws and wood glue.
Cut the cleats to size and attach them to the side, slat support with 2 1/2" wood screws and wood glue.