Metal Joist

Definition

A horizontal cold-formed metal framing member of a floor, ceiling, or flat roof to transmit loads to bearing points. Often refers to a bar joist.

Purpose

Metal joists provide structural support for floors, ceilings, and roofs, ensuring they can bear loads and maintain stability. They are commonly used in commercial and industrial buildings for their strength and durability.

Examples of Use

• Floor systems: Supporting floors in multi-story buildings.
• Roof structures: Forming the framework for flat or low-slope roofs.
• Ceilings: Providing support for suspended ceilings in commercial spaces.

Related Terms

• Bar Joist: A type of open-web steel joist used in construction to support floors and roofs.
• Truss: A structural framework of connected elements forming triangular units.
• Beam: A horizontal structural element that supports loads across a span.

Notes

• Metal joists are typically made from steel and offer advantages such as fire resistance and reduced weight compared to traditional wood joists.
• Proper installation and alignment are crucial to ensure the structural integrity of the building.
• Regular inspections and maintenance help ensure the longevity and performance of metal joists.