Abstract: Space frames incorporating flanged chords and struts with receiving spaces configured to receive at least portions of the chord flanges without the need for connector nodes that are separate from the chords. For example, a space frame can include a strut, a first chord, and a second chord. The first chord can have a first flange and a second flange fixed relative to the first flange. The second chord can have a third flange. The strut can include receiving spaces configured to receive portions of the first flange and the third flange. The strut can be secured relative to the first and second chords and the space frame can support a reflective surface configured to focus electromagnetic radiation.

Abstract: A portable ground anchor system comprises base plate members having a hinge pin passage formed therethrough and each base plate member having a multiplicity of holes formed therethrough for interaction with ground spikes; central triangular shaped plate members having circular openings formed therethrough at a triangular apex thereof; a spacer member adapted to provide an engagement for a cable, said spacer member interconnected between said central triangular shaped plate members; a cylindrical pin for pivotally joining the base plate members and the central triangular members.

Abstract: A portable ground anchor system comprises base plate members having a hinge pin passage formed therethrough and each base plate member having a multiplicity of holes formed therethrough for interaction with ground spikes; central triangular shaped plate members having circular openings formed therethrough at a triangular apex thereof; a spacer member adapted to provide an engagement for a cable, said spacer member interconnected between said central triangular shaped plate members; a cylindrical pin for pivotally joining the base plate members and the central triangular members.