What do the terms psl lvl and lsl stand for in construction?

In construction, "PSL" stands for "Product Specified Lumber," which refers to engineered wood products designed for specific structural applications. "LVL" stands for "Laminated Veneer Lumber," a type of engineered wood made from layers of thin wood veneers glued together, providing strength and stability. "LSL" stands for "Laminated Strand Lumber," which is made from strands of wood bonded together, offering a high strength-to-weight ratio and used in various structural applications. These materials are often used in framing and support structures in buildings.