Abstract: A rail and stile member of a wood frame is joined at a curvilinear edge at abutting facial surfaces. In a number of embodiments the members have a tenon and mortise connection behind the curvilinear edge. In one embodiment a three piece joint is formed with curvilinear edges at each pair of abutting facial surfaces. The method of forming the joint includes the forming of a guide template having the desired configuration but displaced from the joint line and cutting of the rail and stile with a router tool of a preselected bit size.