What are I-Joists?
I-Joists are a prefabricated joist suited for long span construction in residential and commercial buildings. The “I” shape of the joist is formed by a top and bottom flange usually constructed of laminated veneer lumber (LVL) or machine stress rated (MSR) lumber and glued together with a oriented strand board (OSB) web. This “I” shape gives the joist great strength, while maintaining a light weight. Since they are manufactured they have a uniform strength and stiffness unlike traditional dimensional lumber. For more information on prefabricated wood I-joists in general please visit the Canadian Wood Council. Why use I-Joists? • Large range of depths and series available • Uniform depth and strength • Prefabrication nearly eliminates warping, shrinkage, crowning and splitting • Wide top flange allows for easy installation of sheathing • Span farther and can carry more load • Environmentally friendly as wood is used efficiently • Weight less for easy handling and installation • Factory
