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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I-joist – Wikipedia

Fundamentals of Building Construction. I-joists require correct installation. National Fire Protection Association Journal. Invented inthe I-joist is an engineered wood product that has great strength in relation to its size and weight. Languages Deutsch Edit links.

I-joists’ dimensional soundness and little or no shrinkage help eliminate squeaky floors. 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.

BCI® Joists

It is grooved on one side to receive the web. By using this site, you agree to the Terms of Use and Privacy Policy. Retrieved from ” https: A similar situation occurs where the I-joist crosses a main beam. An engineered wood joistmore bi known as an I-joistis a product designed to eliminate problems that occur with conventional wood joists.


From Wikipedia, the free encyclopedia. The web is typically made from plywoodlaminated veneer lumber, or oriented strand board. Building materials Engineered wood. The intended use for an I-joist is for floor and roof joists, wall studs and roof rafters in both residential and commercial construction.

The flange can be made from laminated veneer lumber or solid wood finger-jointed together for ultimate strength. The most common mistake is misplacing or improperly sizing holes in the web, which can compromise the jooist strength, potentially leading to structural failure. Views Read Edit View history. An I-joist has two main parts, the web and flange. After assembly, the Joish is end-trimmed and heat-cured or left at room temperature to reach approximately equilibrium moisture content.

Depths can range from 9.

Common mistakes made with installing I-joists include cutting or chiseling the flange, improperly sized joist hangers, improper nailing and wrong-sized nails.

The lightweight nature of Bcu makes them more vulnerable to fire than dimensional lumber. Mismatches can strain the joist. Charcoal biochar Firelog Firewood Pellet hoist Wood fuel.


Sizes vary according to the I-joist’s intended load and span. The biggest notable difference from dimensional lumber is that the I-joist carries heavy loads with less lumber than a dimensional solid wood joist.

Boise Cascade® BCI® Joist | BCI | Build With BMC

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.

After sizing the webs and flanges, they are assembled with water-resistant glue by pressing the web into the top and bottom flange. Missed nails and glue setting too fast can lead to an uneven or squeaky floor. The rim joist depth must match the I-joist size. This page was last edited on 23 Decemberat