Structure / Engineered structural wood

Mass timber

/mæs ˈtɪm.bər/noun

From Latin massa, “bulk,” and Old English timber, “building wood.”

Definition

Structural framing made from large prefabricated engineered wood elements, such as cross-laminated timber (CLT) panels and glulam beams and columns.

Lengthwise plyCross ply at 90°Cross-laminated timber (CLT) panel
Fig. 95 — Mass timber: schematic studyNOT TO SCALE
Illustrative photograph of mass timber
Illustrative study — Mass timber · AI-generatedSAMPLE IMAGE
Photo study — Mass timber · AI-generated00:06

Structural & construction notes

CLT glues layers of boards at right angles for strength in both directions. Large sections char at a predictable rate in fire, and the material stores carbon. Connections, moisture protection during construction, and code limits on height need care.

An educational reference. Project-specific design requires professional guidance.