Abstract: Composite structural timber which is reinforced with deformed metal bars. The timber comprises a plurality of wooden laminations bonded together by a resin adhesive. There are at least two longitudinally extending metal bars. One bar is located near one longitudinal edge of the timber and the other is located near the other longitudinal edge. The composite structure provides superior load carrying capacity and reduction in deflection under a given load. The main use is as structural timber beams and posts.