A frame member (14, 16, 18, 20, 51, 414, 416, 418, 502, 504, 590) for a structural assembly for automation equipment which can be interlocked to form a structure or to other components, comprising: four generally flat, elongated faces (30a-30d, 512, 514) and at least one face having an elongated slot therein extending along an axis, the slot being defined by: first and second generally flat, converging sidewalls (34, 36), the first and second converging sidewalls (34, 36) lying in corresponding planes which are at acute angles between 30° and 80° extending from the face and having first terminal edges (34a, 36a); first and second diverging, generally planar outer abutment walls which extend from the first terminal edges (34a, 36a) of the first and second converging sidewalls (34, 36) and have inner edges (42a, 44a), the first and second diverging outer abutment walls being non-parallel to the first face; first and second diverging inner abutment walls (46, 48) extending from the inner edges (42a, 44a) of the first and second outer diverging sidewalls toward the face, the first and second diverging inner abutment walls (46, 48) having second terminal edges (46a, 48a); and a generally concave terminal wall interconnecting the second terminal edges (46a, 48a); and a nut can be provided within the slot in the at least one face and threaded onto a shaft of a bolt to clamp components against the frame member (14, 16, 18, 20, 51, 414, 416, 418, 502, 504, 590). four generally flat, elongated faces (30a-30d, 512, 514) and at least one face having an elongated slot therein extending along an axis, the slot being defined by: first and second generally flat, converging sidewalls (34, 36), the first and second converging sidewalls (34, 36) lying in corresponding planes which are at acute angles between 30° and 80° extending from the face and having first terminal edges (34a, 36a); first and second diverging, generally planar outer abutment walls which extend from the first terminal edges (34a, 36a) of the first and second converging sidewalls (34, 36) and have inner edges (42a, 44a), the first and second diverging outer abutment walls being non-parallel to the first face; first and second diverging inner abutment walls (46, 48) extending from the inner edges (42a, 44a) of the first and second outer diverging sidewalls toward the face, the first and second diverging inner abutment walls (46, 48) having second terminal edges (46a, 48a); and a generally concave terminal wall interconnecting the second terminal edges (46a, 48a); and a nut can be provided within the slot in the at least one face and threaded onto a shaft of a bolt to clamp components against the frame member (14, 16, 18, 20, 51, 414, 416, 418, 502, 504, 590). first and second generally flat, converging sidewalls (34, 36), the first and second converging sidewalls (34, 36) lying in corresponding planes which are at acute angles between 30° and 80° extending from the face and having first terminal edges (34a, 36a); first and second diverging, generally planar outer abutment walls which extend from the first terminal edges (34a, 36a) of the first and second converging sidewalls (34, 36) and have inner edges (42a, 44a), the first and second diverging outer abutment walls being non-parallel to the first face; first and second diverging inner abutment walls (46, 48) extending from the inner edges (42a, 44a) of the first and second outer diverging sidewalls toward the face, the first and second diverging inner abutment walls (46, 48) having second terminal edges (46a, 48a); and a generally concave terminal wall interconnecting the second terminal edges (46a, 48a); and a nut can be provided within the slot in the at least one face and threaded onto a shaft of a bolt to clamp components against the frame member (14, 16, 18, 20, 51, 414, 416, 418, 502, 504, 590).