The above picture shows a top view of the base assembly. The base assembly consists of a 3/4” thick framing, plywood bottom, base attachments for ladders (2) and a base attachment for the perch post. All wood used for the base is oak.
The 3/4” thick border is routed on the left and right sides and notched three places on front and back to receive the grate. The ladder base attachments are fixed to the plywood bottom with glue and screws. The ladder base attachments have five routed grooves on top to receive the grate. The perch post base attachment is off-set to the right, glued and screwed to the plywood bottom and routed in the center to receive the grate. The plywood bottom is given three coats of polyurethane.