Anchor for hurricane-resisting building roof structure tie-down

Claim 1

A building system, comprising: a building having a foundation including a pair of holes on opposite sides of the building, said building having a roof structure and a vertical wall structure supporting said roof structure on said foundation; a flexible tie-down strap extending over a transverse plane of said roof structure in the vicinity of said holes; a pair of anchor pins, each of said anchor pins having an enlarged head, each of said pins being permanently fixed to said foundation within said holes with the enlarged head thereof extending outwardly from said foundation; a pair of bolts; a pair of hollow steel boxes, each having near one end a keyhole slot, wherein the head of a corresponding one of said anchor pins is engaged in said keyhole slot, each of said boxes having a pair of holes receiving a corresponding one of said bolts therein; and a pair of tensioning devices, one for each end of said tie-down strap, each connected to a corresponding one of said boxes by means of the corresponding one of said bolts through the pair of holes of said box, each said tensioning device engaging one end of said tie-down strap and operable to draw said strap toward said tensioning device, to thereby firmly tie said roof structure to said wall structure.