This research measures installation productivity for CLT panel construction on a 10-storey case study building in Sydney, Australia. It aims to show the potential efficiency of this type of construction and, in doing so, assist with uptake in the marketplace.
The research method for data gathering utilised a time and motion approach using a time lapse camera mounted on the mast of the tower crane, plus other cameras. Crane cycle times were recorded and analysed for each panel, including the square meter of each panel placed. Statistical and observational analysis were undertaken with a view to deriving expected rates of installation productivity, as well as testing certain independent variables that affect installation speed.
The study shows how crane cycle speed is correlated to productivity, including gross and net crane time scenarios. The research contribution is the focus on the crane as the lead resource and key unit of measure driving installation productivity in prefabricated construction, as distinct from past labour based studies. It shows the potential of tall timber buildings from a construction process perspective.