Glued laminated timber

Glued laminated timber (often shortened to glulam) is a structural engineered wood product made by bonding layers of dimensional lumber with moisture-resistant structural adhesives so the wood grain in each layer runs parallel to the member’s length. The resulting elements can be manufactured in a range of sizes and shapes, including straight members and curved components such as arches and frames used in building structures.

In North America, the lumber used for the laminations is commonly called laminating stock (or lamstock). Glulam is produced by preparing and grading lumber, joining boards to create longer laminations, applying adhesive and pressing the layers under controlled conditions, and then finishing the cured members to meet structural and appearance specifications.

Glulam is used in applications that benefit from long spans and prefabricated structural members, including roof systems, public buildings, and bridges, and is manufactured to meet established building and product standards.

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