An engineered wood joist, more commonly known as an I-joist, is a product designed to eliminate problems that occur with conventional wood joists. Invented in. 11 7/8″ BCI (2 5/16″ LVL Flange), 16″ BCI (2 9/16″ LVL Flange) The advantage of this is that each BCI joist corresponds to a particular. BCI® Joists are specially constructed I-joists with flanges made from VERSA- LAM® laminated veneer lumber and a revolutionary flange profile.

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A similar situation occurs where the I-joist crosses a main beam. Sizes vary according to the I-joist’s intended load and span. An engineered wood joistmore commonly known as an I-joistis a product designed to eliminate problems that occur with conventional wood joists.

By using this site, you agree to the Terms of Use and Privacy Policy. The advantage of I-joists is they are less likely to bow, crown, twist, cup, check or split as would a dimensional piece of lumber. From Wikipedia, the free encyclopedia. The biggest notable difference from dimensional lumber is that the I-joist carries heavy loads with less lumber than a dimensional solid wood joist.


Depths can range from 9. Invented inthe I-joist is an engineered wood product that has great strength in relation to its size and weight. I-joists require correct installation. After assembly, the I-joist is end-trimmed and heat-cured or left at room temperature to reach approximately equilibrium moisture content.

BCI® Joists – Boise Cascade

I-joists’ dimensional soundness and little or no shrinkage help eliminate squeaky floors. Common mistakes made with installing I-joists include cutting or chiseling the flange, improperly sized joist hangers, improper nailing and wrong-sized nails.

Charcoal biochar Firelog Firewood Pellet fuel Hci fuel. The lightweight nature of I-joists makes them more vulnerable to fire than dimensional lumber. Languages Deutsch Edit links. After sizing the webs and flanges, they are assembled with water-resistant glue by pressing the web into the top and bottom flange. Retrieved from ” https: Building materials Engineered wood.

Missed nails and josit setting too fast can lead to an uneven or squeaky floor. The intended use for an I-joist is for floor and roof joists, wall studs and roof rafters in both residential and commercial construction.


An I-joist has two main parts, the web and flange. National Fire Protection Association Journal. It is grooved on one side to receive the web.

The flange can be made from laminated veneer lumber or solid wood finger-jointed together for ultimate strength. Fundamentals of Building Construction.

The web is typically made from plywoodlaminated veneer bcu, or oriented strand board. Views Read Edit View history. Mismatches can strain the joist. This page was last edited on 23 Decemberat The most common mistake is misplacing or improperly sizing holes in the web, which can compromise the joist’s jokst, potentially leading to structural failure.

The rim joist depth must match the I-joist joisst. The disadvantage is very rapid structural failure when directly exposed to fire, reducing the time available for residents to escape and increasing the danger to firefighters.