The report presents structural considerations of the novel cross-laminated timber and cold-formed steel hybrid system, also referred to as the CLT/CFS system. This novel hybrid system uses CLT floor panels and CFS walls in a platform-type construction to carry all gravity loads, whereas the lateral loads are carried by conventional systems, typically concrete cores or steel braced frames. The CLT/CFS system is a new costeffective and structurally efficient system that helps meet the demand for taller mass timber buildings.
The first section of the report introduces timber as a material and the new trends towards mass timber construction. The second section describes typical and conventional structural systems for hybrid mass timber buildings. The third section explains the combinations of CLT and CFS as structural components to make up the CLT/CFS system, including structural system optimisations and a typical building example. The fourth section outlines the main advantages of the system; and the fifth section presents the key structural considerations of the new CLT/CFS system by means of a worked example.