Glulam is made by gluing multiple layers of 33-45 mm lamella together. This means the growth defects of each individual lamella are distributed over the whole beam cross section, producing a high strength beam. Glulam has a bending strength much greater than standard solid section timber.
When assessing the strength of Glulam you look at the capacity in three different strength categories: Tensile, Compressive and Bending
The tensile strength is the force required to pull the board to the point of failure
The compressive strength is the force required to press the board to the point of failure.
The bending strength is the force required to board break the board when bent.
Compared to other materials, Glulam can produce lightweight structures with large free spans. The resultant column-free area provides high utilisation and flexibility for warehouses and other industrial buildings.
Lower weights can often make savings in foundation costs and are easier to handle with smaller cranes.
The average weight of Whitewood (Spruce) Glulam is 475 kg/m³