Final answer:
The flange of an I-joist can be constructed using solid sawn lumber or engineered wood products like LVL or PSL.
Step-by-step explanation:
The flange of an I-joist can be constructed using either solid sawn lumber or engineered wood products such as laminated veneer lumber (LVL) or parallel strand lumber (PSL).
When solid sawn lumber is used for the flange, it is typically made from a single piece of wood that is cut to the desired dimensions. This type of construction may be more time-consuming and expensive, but it offers the advantage of using a natural material.
Engineered wood products like LVL or PSL are made by layering wood veneers or strands together with adhesives to create a stronger and more consistent product. These materials are often preferred for their strength, dimensional stability, and resistance to warping or splitting.