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These laminated and glued (also known as laminated) spruce/white spruce beams are made of several 40mm thick lamellas, glued horizontally to obtain a greater diversity of sections (they range from 100-640mm thick by 80-240mm high. They are also finger-jointed to obtain large lengths of 13.5m (standard lengths). Due to the previous selection of the wood and the manufacturing processes, this material presents characteristics superior to those of a solid wood piece with the same section. Its main advantages are its high mechanical resistance, namely to bending, compression, traction and cutting, besides a high dimensional stability.Glued laminated timber presents a great set of advantages when compared to other materials used in structures (for instance, on average, its resistance/weight ratio is 1.3 times higher than steel and 10 times higher than concrete), thus being considered an excellent construction material, ecological, used for advanced and demanding constructions, allowing interior spaces to be configured in multiple ways. These beams are marketed in two qualities, visual and industrial, and classified in resistance classes: GL24/BS11, GL28/BS14, GL32/BS16 or GL36/BS18. They can be H-Homogeneous (the most resistant) or K/C-Combined (normally the most marketed).
GL24: 100-640mm thick by 80-240mm wide
Duo Lam: 140-160mm thick by 140-200mm wide
Trio Lam: 160-200mm thick by 200 to 240mm wide