Cross-laminated timber (CLT) is a wood panel product made from glueing layers of solid-sawn lumber together. Each layer of boards is oriented perpendicular to adjacent layers and glued on the wide faces of each board, usually in a symmetric way so that the outer layers have the same orientation. An odd number of layers is most common, but there are configurations with even numbers as well (which are then arranged to give a symmetric configuration). Regular timber is an anisotropic material, meaning that the physical properties change depending on the direction at which the force is applied. By gluing layers of wood at perpendicular angles, the panel is able to achieve better structural rigidity in both directions. It is similar to plywood but with distinctively thicker laminations.
However, it is produced in a cardboard form, unlike the glulam, and is used as a building material such as a wall, slab or roof, as well as furniture manufacture or exterior and interior finish.
Adhesives, that are environmentally friendly, do not contain harmful ingredients. Due to this reason CLT can breathe like a natural wood. Therefore, exposure to moisture can maintain long life without damaging it.
The Pyramidkogel Wood Tower used 100m3 of CLT, to construct office space and Skybox interior and interior materials.
Various uses of CLT