2.10. Space trusses
A space truss is a unidirectional framework that can be imagined as two planes of trusses intersecting at the lower chord, with the upper two chords forming a third truss. This 3D truss is now capable of resisting vertical, horizontal, as well as torsional forces.

Trusses are typically made of steel, wood, or occasionally a combination of steel and wood. Concrete is seldom utilized for trusses due to its weight. Whether to use steel or wood depends on the type of structure required, the intended aesthetic, and compatibility with the roof framing and roofing materials.