Traditional timber framing was developed over centuries by trial and error while combining art and science. Modern designs and an intrinsic need to validate traditional timber framing has led to an architectural and engineering scrutiny of materials and methods not prescribed in codes and standards. Proprietary fasteners and steel hardware have become commonplace for non-traditional and hybrid timber framing. Traditional timber framing does not employ these materials as primary mechanisms. On-wood, in-wood, to-wood connections are the essence of traditional timber framing. Part 2 will offer an overview of design standards and allowable stresses. The subsequent discussion will include rules of timber joinery design, overview of typical connections, rounded dove-tail joints, pegged connections, keyed-through tenon joints, and moment connections.
Robert L. Raffle, AIA, SE, ME