Q:

How is an I-joist installed?

A:

Quick Answer

According to Norboard, I-joist installation requires special tools, flexible planning and an understanding of framing techniques. It is not a simple job. An I-joist is an engineered joist that is stronger than the wooden variety. However, it does require some care during installation in order to function properly. Before installing an I-joist, read the manufacturer's instructions and technical guides.

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Full Answer

Bracing and nailing the I-joist is the first step in installation. Use the appropriate blocking panels, joist hangers and rim board to brace the I-joist. Use temporary bracing during installation to keep the I-joists from buckling. Do not place any weight on the I-joists until properly bracing and sheathing them.

For installation, use rim framing around the edges of the floor or roof. This transfers weight to the surrounding walls in order to keep it off the end of the I-joists.

Blocking refers both to the process of installing material between the joists and to the material used in this process. It creates a grid between the joists that distributes the weight placed on the walls or the floors. To determine how much blocking is needed and where to put it, consult a manufacturer's span chart or a design professional.

I-joists are more durable than wood, but they do require some care to store until use. For storage, ensure that the I-joists are stacked level and upright. When storing the I-joists, keep them off the ground, and protect them from the weather. Do not attempt to modify I-joists, as the modifications may negatively affect their ability to transfer loads to the joist supports.

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