=Introduction= 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.
=Challenges= A triangle is the simplest geometric figure that will not change shape when the lengths of the sides are fixed. In comparison, both the angles and the lengths of a four-sided figure must be fixed for it to retain its shape.
=Approaches= <gallery> Truss-simple.scad.png|Simple truss Truss-spacers.scad.png|Truss with spacers or stacked washers Truss-craftsman.scad.png|Truss with tri joints </gallery>
=References= * [https://en.wikipedia.org/wiki/Truss Wikipedia: Truss] * [https://en.wikipedia.org/wiki/Space_frame Wikipedia: Space frame]