1. What are Engineered Wood Products (EWP)?
Engineered wood products (EWP) can be defined as the range of manufactured composite products processed for increased quality and capacity for the architecture, engineering and construction (AEC) industry.
For example, glue-laminated timber (glulam) is manufactured by bonding together layers of solid timber boards or laminations with structural adhesives. Each board runs parallel to the element's longitudinal axis. Before being glued together to form the cross-section desired, the boards are often finger-jointed, i.e., bonded in the lengthwise splice of continuous laminations. Glulam has a high strength-to-weight ratio, superior fire performance and corrosion resistance. Glulam elements are often used as load-bearing joists, beams and columns, and need to be tested and approved by official testing bodies.
A typical adhesive bond line in timber engineering has a thickness of 0.1-1mm. Although adhesive bonding often represents only a tiny part of an EWP, it is usually crucial for the product's strength and reliability.