Joist

Joist

A joist is a horizontal structural member used in framing to span an open space, often between beams that subsequently transfer loads to vertical members. When incorporated into a floor framing system, joists serve to provide stiffness to the subfloor sheathing, allowing it to function as a horizontal diaphragm. Joists are often doubled or tripled, placed side by side, where conditions warrant, such as where wall partitions require support.

Types of joists

Open web steel joists

Open web steel joists, sometimes known as bar joists, are an engineered, truss-like construction component used to support loads over short and long spans alike. They are designed and manufactured to be efficient structural components, handling significant loads by utilizing the least amount of material necessary.

Wood joists

Wood joists were historically made of rough-sawn lumber, but are currently typically made of engineered wood for its strength and stability. The use of a floor joist system provides a lot of benefits. They are lightweight, quick to install, and provide a flat surface upon which the subfloor can be installed.

Engineered wood joists

Engineered wood joists - This type of joist is typically made from engineered wood products and is designed to be strong and stable. They are often used in floor systems because they can span long distances without requiring support from underneath.

See also

• Beam
• Truss
• I-beam
• Structural steel

References

Joist Resources
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