#Lvl lumber windows#
It has been reported that about 29% of all LVL is used in I-beam flanges, while 64% is used as heavy-duty beams and headers over windows and doors (Anonymous 2009). LVL is a structural material, and it is used extensively in the construction of residential and commercial buildings in the U.S. For example, Populus tremuloides, Populus balsmifera, Liriodendron tulipifera, Acacia mangium, Gmelina arborea, Albizia falcata, and some Eucalyptus species have been used or tested for use in the manufacture of LVL (Ozarska 1999). LVL is manufactured from softwood species and low-to- medium density (290-690 kg/m 3) hardwood species of trees. Another commercial, wood-based product is LVL. Plantations of fast-growing trees are being used increasingly for the commercial production of reconstituted products, such as hardboard, particleboard, medium density fiber board (MDF), oriented strand board (OSB), and laminate strand lumber (LSL) (Cossalter and Pye-Smith, 2003). Poplar, Pinus, and Eucalyptus plantations have been established in many countries due to their advantages of short production time and low cost. Fast-growing tree plantations are being established in many parts of the world to overcome the shortage of wood. Naturally-grown forests are decreasing enormously due to the extensive use of wood and the rapid growth of the population (Anonym 2006). The fast-growing trees include Eucalyptus, Acacia, Pinus, and Poplar trees, and the mean annual increment of these species is in the range of 5-40 m 3/ha/year (Cossalter and Pye-Smith 2003). Some trees grow faster than other trees, and these trees are named fast-growing trees. Keywords: Eucalyptus grandis, physical properties, mechanical properties, Populus x euramericana, reinforcement. As a result, it can be said that both Poplar and Eucalyptus veneers can be used to produce laminated veneer lumbers, and Poplar laminated veneer lumbers can be reinforced with Eucalyptus veneers. When the two were combined and Eucalyptus was used as the top and bottom plies, the mechanical properties also were better than those of Poplar laminated veneer lumbers. According to the test data that were obtained, the mechanical properties of laminated veneer lumbers produced with Eucalyptus were greater than those of laminated veneer lumbers produced with Poplar. Some physical and mechanical properties, including density, thickness swelling, water absorption, modulus of elasticity, modulus of rupture, impact bending, and bonding performance were investigated. In this study, laminated veneer lumbers were produced using different combinations of Poplar ( Populus x euramericana I-214) and Eucalyptus ( Eucalyptus grandis) veneers. These two species have been cultivated in many parts of the world, and they are used in several ways, including in the pulp and paper industry, as wood- based panels, and as structural composite lumber. Both the Poplar and Eucalyptus species are fast-growing trees. Turkey.įast-growing tree species are important due to their short growth time before they are harvested. Some technological properties of laminated veneer lumber produced with fast-growing Poplar and Eucalyptusġ Kahramanmaras Sütcü Imam University, Faculty of Forestry, Department of Forest Industry Engineering, Kahramanmaras.
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