In architecture and structural engineering, a space frame or space structure (3D truss) is a rigid, lightweight, truss-like structure constructed from interlocking struts in a geometric pattern. Space frames can be used to span large areas with few interior supports. Like the truss, a space frame is strong because of the inherent rigidity of the triangle; flexing loads (bending moments) are transmitted as tension and compression loads along the length of each strut.
Their geometry is often based on Platonic solids. The simplest form is a horizontal slab of square-based pyramids interconnected and built by means of aluminum or tubular steel posts. In some ways it appears as a structure obtained by placing several horizontal arms of a crane, repeated in space, side by side.
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