Chord

Definition

A chord is one of the main members of a truss braced by web members of the truss. It is also the perimeter member of a building or structure that resists lateral forces.

Purpose

The purpose of a chord is to provide the primary structural support in a truss system, helping to distribute loads and resist bending and lateral forces. Chords are critical components in the structural integrity of buildings and bridges.

Examples of Use

1. Roof Trusses: The top and bottom chords of roof trusses provide support and shape for roofs.
2. Bridges: Chords in bridge trusses help distribute the weight of vehicles and pedestrians.
3. Framing Systems: Perimeter chords in building frames help resist lateral forces such as wind or seismic activity.

Related Terms

• Web Member: The internal braces of a truss that connect the top and bottom chords.
• Beam: A horizontal structural element that supports loads, similar in function to chords.
• Lateral Forces: Forces acting horizontally on a structure, such as wind or seismic forces.

Notes

• Chords must be designed and constructed to withstand specific loads and stresses.
• Proper connection and bracing of chords are essential for the overall stability of the truss system.