The use of large (8mm diameter and larger) fully threaded and partially threaded screws are critical to facilitate the design and construction of Mass Timber (MT) structures. This includes basic applications such as fixing Cross-Laminated Timber (CLT) panels to supporting glued-laminated beams, but also at critical gravity (i.e. beam-to-column) and seismic (timber lateral systems and/or steel collector plates to timber) connections.
The following tech note will explain the conditions required for hydrogen embrittlement to occur, how to identify connections with a higher risk profile, along with recommendations on how to mitigate the risk.
