may function as a part formed of one material in this example rails 302 are rectangular in profile the rectangular portion of each rail 302 on one side of body 301 is of a dimension that fits into channels provided on interfacing sides of the torsion locking blocks the i beam construction profile of structural members 101 and 102 provides sufficient transfer of load forces and is particularly suited for strength structural members 101 and 102 each have openings 303 in alignment with one another in appropriate configuration for assembly with the interspaced locking blocks openings 303 are sized to accept the tensioning bar or rod 107 structural members 101 and 102 have each have openings 303 at locations along each structural member where a torsion structural member lock may be placed not necessarily just at the ends of the members further structural members 101 and 102 may be of any required length for construction the structural members may be assembled using a torsion structural locking block at any desired linear angle including 180 degrees in one embodiment the angle of construction of the structural members is set by the construction of the torsion structural member locks for example a 90 degree angle would require a 90 degree torsion structural member lock fig4 is a perspective view of a torsion locking block 103 of fig1 according to an embodiment of the invention torsion locking block 103 may be manufactured of steel wood fiberglass or other construction materials locking block 103 in this example is quadrilateral in shape having 4 sides a top surface and a bottom surface.