Engineered Lumber outperforms conventional lumber providing greater strength and stability over large spans. It's also resistant to shrinking and warping, easy to install and flexible. Our Trus Joist® Brand Engineered Lumber by Weyerhaeuser includes wood I Beam joists in a variety of widths and lengths. The Ford Lumber staff is committed to work with contractors to determine the optimum joist beam for your roof or floor framing project. Give us a call and speak with a customer support associate, or set up an appointment for an Outside Sales Representative to visit your work site..