How Roof Trusses Work


how roof trusses work What is a truss?

A roof truss is a pre-built structural framework used to support the roof on a building. Trusses are usually made in a factory or somewhere off-site, then lifted into place where they are secured into the roof structure of a building.

Roof trusses are incredibly strong and can distribute the weight of a roof over a larger area. Moreover, they have a web-like design, generally made of wood or steel.

Trusses for roofs are mostly triangular. Triangles are commonly used in construction because of their practicality and ability to create maximum strength for bearing external loads.

Trusses are designed to withstand the three types of loads associated with a building:

  • Live loads — Transient forces within the building such as people, furniture, appliances, and cars.
  • Dead loads — Permanent structures that comprise the structure of a building such as beams, walls, and flooring.
  • Environmental loads — Forces like wind, rain, or snow that act against the building.

How do roof trusses work?

Roof trusses act in compression and force. Compression is the force that pushes elements together, causing the material to shorten or compress. The compression strength of a material is its ability to withstand external forces that push on it. When a column supports a load from above, it is under compressive stress. When this happens, the particles, atoms and molecules in the material shorten.

Tension is the opposite of compression. It pulls the elements apart, thus working to lengthen the material. If a beam is being compressed from the top, it will be in tension at the bottom.

Speak to Experts at CertainTeed for All of Your Roofing Needs

Are you considering building a roof truss at your residence or have additional questions? Contact ABC Roofing Company. Our team of experienced professionals can get the job done safely and quickly.

Contact us directly to discuss your roofing needs. We’re happy to assist you with your upcoming roofing project.

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