Steel home in Texas

WHAT IS A STEEL TRUSS?

Grinda metalica zabrelita

We define a steel lattice truss or steel truss as a structural component that acts as a load-bearing element in a building. The truss consists of a set of bars connected at nodes which are fixed with stiffeners. This means that they do not withstand bending moments or excessive in-plane forces (plane trusses). The bars and nodes form a rigid body that is not deformable in the plane. However, a truss can be a three-dimensional structural element that will also be able to resist out-of-plane forces (space-frame truss).
In principle, bars, and nodes form triangles, either in 2D or 3D, we know that the triangle is the “strongest” geometric shape.

In a structure, a steel truss can have several functions, depending on its position and geometry, and can be:

  • floor truss – described as an element with parallel upper and lower chords. These elements will form the support for the floor layers above and the ceiling below. As static supports, we can consider trusses to be simply or continuously supported. We calculate the height of the truss according to the distance between the supports and the local loads.
  • roof truss – described as an element that forms the shape of the roof. It can have different shapes (parallel trusses, hip trusses, truncated trusses, etc.). The support conditions are similar to those of floor trusses. Column is usually used in industrial buildings to form three-dimensional vertical elements or in residential projects to stabilize a column in a wall.
  • and spatial trusses – to stabilize an element out of its plane, we need to use the extension in the other direction.
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