Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by origin]
6. biological material
7. plant material
8. [wood and wood by product]
9. [wood by product]

Anotations

Scope note:

A type of structural lumber product composed of a wood core with several layers of wood veneer bonded to the front and back by durable adhesive known as laminating stock. Glue-laminated timber beams are used as an alternative to steel beams in construction due in part to the relative energy-efficiency of their manufacture which produces far less greenhouse gas emissions.