Cross laminated timber (CLT)

Cross laminated timber (CLT) consists of at least three layers of layer-glued (or joined using dowels) softwood timber planks where the direction of the grain in adjacent layers is perpendicular to each other. Individual planks are either visually sorted or machine graded prior to joining using adhesives or dowels. Lay-up of CLT has to be symmetrical in cross section of the product. Planks may be joined by edge-gluing and may also be finger-jointed in the longitudinal direction. There is a gradual transition from multi-layered solid wood panels to cross laminated timber (in the latter the dimensions of individual elements are larger).

Structural solid panels

Cross laminated timber (CLT) provides a leading-edge alternative for mid/high-rise buildings. Although the technology is relatively new and not yet recognized in Chinese codes, it is widely used across Europe. So far, there are a number of six to ten story wood buildings erected in Sweden, Austria, Germany, UK etc. and higher practices are ongoing.

Cross-laminated boards are glued together and used to build walls and joists. Panels are machined in a factory to fine tolerances by computercontrolled equipment. The panels arrive on site with apertures for doors and windows, and wiring and plumbing channels already prepared. The walls can be insulated to provide a high level of energy-efficiency. Superior load-carrying characteristics, including lateral stability against wind and seismic forces, as well as excellent fire safety performance, make cross laminated timbers suitable for medium and even high-rise buildings. And the amount of timber used means buildings made with solid wood panels are highly effective carbon stores.

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Cross laminated timber

 
European Wood (in China)
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Sino-European Wood
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