Cross-Laminated Timber: A Global Review of Standards and Research

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Abstrakt

Cross-laminated timber (CLT) has developed from a Central European engineered-wood innovation into one of the most widely discussed mass-timber systems in contemporary construction. Its appeal comes from the combination of plate action, prefabrication, low structural self-weight, dry assembly, and the possibility of integrating structural and architectural functions within the same panelised system. This review paper summarizes the main international standards, design frameworks, and research streams that have shaped present-day CLT practice. The paper first outlines the basic material form of CLT and the general benefits associated with orthogonal lamination, factory manufacture, and multi-storey timber construction. It then reviews the leading regulatory pathways in Europe, North America, Japan, and Australasia, with attention to the relationship between product qualification, structural design rules, and project-level verification. The literature review also synthesizes major research contributions on rolling shear, effective stiffness modelling, connection behaviour, seismic response, fire performance, moisture effects, creep, vibration, and building-serviceability issues. The discussion highlights the broad convergence that now exists between standards and research, while also identifying unresolved questions related to long-term behaviour, connection robustness, moisture management during construction, and prediction of vibration and acoustic performance in increasingly complex hybrid assemblies. The paper concludes that CLT is already a technically mature structural platform, but one whose continued expansion depends on coordinated product testing, reliable analytical methods, and deeper whole-building performance research.

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