into three groups: upper cordon, cordon, and cordon lower diagonal.
* Triple-layer grid: Elements are placed in three parallel layers, linked by the diagonals. They are almost always flat.

Other examples classifiable as space frames include:

* Pleated metallic structures: Emerged to try to solve the problems that formwork and pouring concrete had their counterparts. Typically run with welded joint, but may raise prefabricated joints, a fact which makes them space meshes.
* Hanging covers: Designs on the cable taut,

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