Fastener for Corrugated Sheet

A fastener for a corrugated sheet comprising:

• a corrugated sheet including a plurality of through holes;
• at least one support mounted on a top of the corrugated sheet;
• at least one steel member mounted on a bottom of the corrugated sheet;
• a cylindrical assembly including a plurality of elongated, plate shaped fastening members assembled as a hollow cylinder, each fastening member tapered to one end to form a hook at one end and having a curved groove on an outer surface, and a curved trough on the outer surface at the other end of the fastening member, the curved troughs assembled to form an annular recess;
• a retainer ring secured to the annular recess;
• a ring-shaped elastic member secured to the curved groove;
• and a washer;
• a threaded bolt driven through the washer, the retainer ring, the fastening members, the support, and the corrugated sheet into the steel member;
• an expansion nut having a multi-sided outer surface and moveably secured to the threaded bolt;
• and
• a ring-shaped first sealing member fastened between and by the support and the corrugated sheet and disposed on each through hole;
• wherein the threaded bolt is secured to the expansion nut which is surrounded by the hooks prior to driving through the support.