: Composed of top and bottom flanges (lumber or LVL) with an OSB web. Best for : Long spans and high-performance floors.

: Cost-effective and widely available at retailers like The Home Depot .

: The traditional choice made from solid lumber like Douglas Fir or Southern Pine . Best for : Simple residential projects and shorter spans.

: Combine timber flanges with a steel "V" web.

: Complex builds requiring HVAC, plumbing, or electrical routing through the floor zone.