The top is roughly 48x32 and the legs are about 18" long on the outside, 14 on the inside. The side rails are about 4". made rabbets in the side rails, then glued the rails to the plywood base.
I had previously promised to upload the drawing but completely forgot. I sent a message to myself at home to remind me. I'll also check if my coworker that gave the plan to me still has his copy here in the office. If he does, I can scan it on the fancy copier and make a PDF to upload.