Sjoists

Sjoists are a type of engineered wood joist used in residential and commercial construction for floor and roof framing. They are also known as I-joists or IJ-joists. Sjoists are manufactured by combining two components: a solid wood flange, typically made of kiln-dried lumber such as pine or fir, and a web made of oriented strand board (OSB) or plywood. These two components are bonded together, often with structural adhesives, to create a strong, lightweight, and dimensionally stable structural member. The "I" shape of the joist, similar to an I-beam in steel construction, provides excellent strength and stiffness in both bending and shear. This design allows Sjoists to span longer distances than traditional dimensional lumber joists of equivalent depth, reducing the need for intermediate support walls. They are also less prone to warping, twisting, and shrinking, which can be common issues with solid lumber. The manufacturing process ensures a consistent quality and performance, and their lightweight nature makes them easier to handle and install on job sites. Sjoists are an environmentally friendly option as they are typically made from wood resources that are sustainably managed, and their efficient use of material can lead to less waste. They are widely used in modern building practices due to their performance advantages and cost-effectiveness.