glulam

Glulam, short for glued laminated timber, is an engineered wood product composed of multiple layers of dimension lumber bonded together with durable adhesives. The wood laminations are arranged with their grain running parallel, allowing the creation of long, strong members such as beams, columns, arches, and curved elements. By combining lams from available timber, glulam can be tailored to specific spans, loads, and architectural shapes.

Manufacturing involves selecting appropriate species, drying the lam sections to a target moisture content, applying high-strength adhesive, and pressing the bonded stack into the desired cross-section and length. The cured member is then finished with end-trade surfaces, a protective coating if needed, and sometimes facing or trim to meet aesthetic or exposure requirements. Glulam can be produced in straight or curved forms, enabling architectural versatility beyond conventional lumber.

Performance and use: glulam offers a high strength-to-weight ratio and excellent dimensional stability, enabling longer spans and lighter construction than many solid timbers. Its properties can be engineered through lam orientation, species choice, and grade. Glulam is used in a wide range of structural applications, including floor, roof, and bridge systems, as well as exposed architectural features. Outdoor and exposed environments may require protective coatings, preservative treatments, or fire-resistant design measures.

Standards and sustainability: glulam is manufactured to international standards (for example, European EN 14080 and various national regulations) and evaluated for mechanical performance, durability, and fire behavior. It is considered a renewable material, though the choice of adhesives and finishes can influence environmental impact and indoor air quality.