Floor Joist

Definition

A Floor Joist is a support beam, commonly installed in parallel with other beams, to create a structural floor system to which floor sheathing is fastened.

Purpose

The purpose of a Floor Joist is to provide structural support for the floor, distributing loads to the building's framework and creating a stable base for floor sheathing and finish flooring.

Examples of Use

• Residential Construction: Installing floor joists in homes to support floors and distribute loads.
• Commercial Buildings: Using floor joists in office buildings to create strong and stable floors.
• Deck Construction: Employing floor joists to support decking materials in outdoor structures.

Related Terms

• Beam: A structural element that primarily resists loads applied laterally to its axis.
• Sheathing: The board or panel material used to cover a floor, wall, or roof structure.
• Subfloor: The layer of material installed on top of floor joists, serving as a base for the finish flooring.

Notes

• Floor joists must be properly sized and spaced to support the intended loads and comply with building codes.
• The type of wood or material used for floor joists can affect the strength and performance of the floor system.