Cross-laminated timber
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Cross-laminted timber (CLT) is a plate-like product made from timber. Layers of planks are glued orientated at 90° to each other, 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). The cross gluing allows using the plates with two span directions whereby some differences in stiffness and strength are observed along the two directions. It is similar to Plywood but with distinctively thicker laminations.
CLT must not be confused with Glued laminated timber (GLT), a product with all laminations orientated in the same way.[1]