This invention allows attachment of strut channels 2, pipes, conduit, and mounting of equipment to the interior of buildings and other structures. Attachment to structures such as I-Beams, channels, structural angles, purlins and truss structures are improved. Extended use of self tapping screws 28 and commonly used metal strapping are enabled. The use of dimpled holes 7 facilitate insertion of self tapping screws 28 thus expanding their function. Tab cut outs 6 in attachment hardware that allow strapping to pass and hook provide new and efficient methods for using standard strapping. New mounting hardware in combination with beam clamps, another invention of mine, use the beam clamps along with appropriate accessories, which are part of that invention, to provide new methods of attachment. Strut channels 2 are changed to integrate the use of these improvements.