Veneer lumber
As parallel strand lumber (PSL derived from parallel beach Lumber ) is a wood-based material referred to, the group consisting of veneer is produced. The three to seven millimeter thick veneer is cut into strips around 13 millimeters wide and 1.8 to 2.5 meters long and glued together.
Due to the parallel position of the strips, the veneer strip wood differs from the classic plywood , which is also made from veneers . Laminated veneer lumber is also made from parallel layers of veneer, but here they are glued together over their full width to form a material panel.
Veneer strip wood can be produced in almost any cross-section and used, for example, as an alternative to beams made of solid wood . It is also possible to provide targeted reinforcements of the cross section, in particular to absorb compressive forces on sections subject to higher loads.
Beams made of strips of veneer wood have a higher strength than solid beams of the same type of wood because they have a more even structure and in particular there are no weakening knots.
Veneer strip wood is manufactured in the USA by the Weyerhaeuser company under the name Parallam from softwoods such as Douglas fir . Cross-sections of 300 × 300 mm and 300 × 460 mm in lengths of up to 18 m are produced, which are then sawn open as required.
literature
- André Wagenführ, Frieder Scholz (Ed.): Pocket book of wood technology. Carl Hanser Verlag, Leipzig 2008; 155. ISBN 978-3-446-22852-8 .
- Nicole M. Stark, Zhiyong Cai, Charlie G. Carll (Eds.): Wood Handbook . Forest Products Laboratory, Madison, WI 2010, pp. 11-21.
Web links
- Veneer strip lumber (PSL) (accessed on August 14, 2020)
- Properties and potential uses of new wood-based materials in construction (accessed on August 14, 2020)
- Wood-based materials (accessed on August 14, 2020)
- Constructive wood-based materials (accessed on August 14, 2020)
- Wood use (accessed on August 14, 2020)