Abstract: In accordance with the present invention, there is provided a timber formwork I-beam which incorporates a bolt receiving channel. The I-beam is formed from an elongated generally planar web member of laminated wood having opposite side edges. A first elongated rectangular wooden flange is rigidly attached to one of the side edges and a second elongated rectangular wooden flange is rigidly attached to the opposite side edge, the first and second flanges extending substantially along the entire length of the web portion. The second elongated flange has opposite first and second sides, the web being rigidly attached to the first side. An elongated metal conduit is contained within the second flange between the first and second sides, the conduit extending along the length of the flange. The conduit defines an elongated passage extending along the conduit. The second flange has an elongated slot opening on the second side, said slot communicating with the passage of the conduit.