Cross Laminated Timber

Cross Laminated Timber (CLT) is a recent development which is used as the major structural element in pre-fabricated buildings such as the eight storey residential block built at Murray Grove, Islington. CLT is essentially a development of glue-laminated timber where cross-laminated planks of whitewood are bonded into large structural elements from which walls, roofs and floors are machined. Kiln-dried boards are graded and finger jointed into endless lamellae which are planed and edge-bonded into lamellae. The faces of the lamellae are face-bonded into CLT under high pressure and subsequently CNC machined to size with door and window openings.

The advantage of CLT over conventional timber-framed buildings include precision manufacture with negligible defects, ease of contruction by crane, assembly using standard power tools and simple brackets and very rapid build times. CLT has all the advantages of timber including low embodied energy, excellent acoustic and thermal properties and good load-bearing performance in fire. CLT is often lined with plasterboard to further enhance fire-resistance. Overall, CLT is a dimensionally stable material of construction wich allows highly flexible design of timber buildings and rapid construction through pre-fabrication in controlled environments.

 

Useful links

Reinhard Brandner 'Production and Technology of Cross Laminated Timber (CLT)'

B&K Cross-Laminated Timber (X-LAM)

KLH (Kreuz Lagen Holz) Cross-Laminated Timber

Waugh Thistleton Architects, Murray Grove

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