Reusable fall restrain supports and fall arrestor

A modular system having mostly re-usable components for fall restrain support and fall arrest of construction and maintenance workers on the perimeters of roofs and incomplete stories of building construction sites, said system comprising:

• a) at least one disposable base permanently attached to an I-beam, a floor or a roof, said disposable base comprising:
• a section of a C-Channel with a top horizontal portion and two vertical flanges extending downward, forming an outside surface and an inside surface between the two vertical flanges;
• a cylindrical hole passing though the top horizontal portion from the outside surface to the inside surface;
• a top nut comprising a cylindrical hole having a diameter and a center and further comprising a female screw thread, said top nut being welded to the top horizontal portion on the outside surface so that a line extended through the center of the cylindrical hole of the top nut coincides with a line extended through the center cylindrical hole passing through the top horizontal portion of the C-Channel;
• and,
• a bottom nut comprising a cylindrical hole having the a center and a diameter equal to that of the top nut and with a female screw thread having a pitch equal to that of the top nut, said bottom nut being welded to the top horizontal portion on the inside surface so that a line extended through the center of the cylindrical hole of the bottom nut coincides with a line extended through the center of the cylindrical hole passing through the top horizontal portion of the C-Channel and further coincides with the line passing through the center of the cylindrical hole of the top nut;
• (b) at least one re-usable post positioned vertically and having a vertical height, wherein said re-usable post further comprises a cylindrical bottom portion, said cylindrical bottom portion further comprising a male screw thread having a pitch that mates with the female screw thread of both the top nut and bottom nut;
• wherein, when use of the system is desired, the at least one re-usable post is screwed into the at least one disposable base through both the top nut and the bottom nut, so as to securely stand up in a vertical position;
• and,
• wherein, when use of the system is no longer desired, the at least one re-usable post may be removed by unscrewing.