Built-Up Member

Definition

A built-up member is a single structural component made by joining together multiple pieces, typically through welding, bolting, or riveting, to form a stronger or more complex section.

Purpose

Built-up members are used to create structural elements that can support greater loads or span longer distances than individual pieces alone. This technique allows for the optimization of material properties and the construction of custom shapes and sizes that meet specific design requirements.

Examples of Use

1. Steel Girders: Built-up girders made from plates and angles are used in bridges and buildings to support heavy loads.
2. Trusses: Built-up members form the components of trusses, which are used in roofs and bridges to provide strength and rigidity.
3. Columns: Built-up columns, often composed of steel plates and shapes, support large structures and resist compressive forces.

Related Terms

• Welding: The process of joining materials, usually metals, by causing coalescence.
• Bolting: The method of connecting pieces using bolts, often used in built-up members.
• Riveting: A permanent mechanical fastener used to join multiple pieces in built-up members, commonly used in historical structures.

Notes

The design and construction of built-up members must consider load distribution, stress concentrations, and potential points of failure. Proper engineering and fabrication techniques are crucial for ensuring the integrity and performance of built-up members.