Carpentry & Building ConstructionChapter 13:
Engineered WoodChapter SummariesSection 13.1 Plywood
Plywood is made from layers of wood veneer called plies. The plies are glued together with adhesives, some of which are water resistant. The plies are then joined under heat and pressure. Construction plywood grades are based on type of adhesives, veneer quality, wood species, construction, size, performance, and special characteristics. Plywood may be made from either softwood or hardwood. Section 13.2 Composite Panels, Laminated Veneer, &; I-Joists
Composite panels are made from pieces of wood mixed with adhesives and joined under heat and pressure. Composites include oriented-strand board, fiberboard, particleboard, and fiber-cement board. Some panels are given special finishes. Engineered-lumber products are often used in combination with conventional materials. Laminated-veneer lumber (LVL) is a family of engineered products made with wood veneer. One common laminated-veneer lumber product is the I-joist, used in floor and roof framing. Section 13.3 Other Types of Engineered Lumber
Glulam beams are made of layers of lumber glued together. Glulams are fire resistant. A finger-joint is a way of joining solid wood end to end. Finger-jointed lumber is consistently straight, can be sawed and nailed like solid lumber, and is available in longer lengths than standard lumber. Laminated-strand lumber (LSL) is made from strands of wood glued together. Parallel-strand lumber (PSL) is made from ribbons of wood veneer glued together.  | 
