Challenges in the design of a modular multi-storey CLT building using Irish timber

Cross Laminated Timber (CLT) has been developed in recent years to the stage of automation in production, from timber classification, joining boards, applying adhesive, assembly pressing and CNC machining to form completed CLT panels. Volumetric buildings incorporating CLT are now being developed and completed, showing promising results as sustainable solutions for the construction industry. The majority of European CLT panel manufacturers use grade C24 timber, while countries such as Ireland also have an increasing supply of Sitka Spruce grade C16 timber which has been shown to be suitable for use in CLT. This paper presents elements of a larger research project and focuses on the preliminary design and development of a proposed modular seven-storey building in CLT manufactured from Irish timber, addressing the usage of CLT in volumetric modular construction. Challenges in delivering a building of this type are addressed in terms of building layout, loading arrangement, transportation, and structural design of panels. Design for deconstruction is also considered for the connections between the units to enable future reuse.