Patent ID: 8771544

Claim:
A first prefabricated stair tower module installed inside a wind tower, said wind tower having a plurality of first connection points, said first prefabricated stair tower module comprising: a. At least one preassembled ships style stair, said ships style stair having an angle of slope ranging from about 52 degrees to about 68 degrees, comprising; b. At least one stair stringer; c. A plurality of stair treads, each stair tread being supported by the stair stringer; d. Each stair tread being oriented relative to the stringer and to every other tread to comprise rising steps; e. An upper landing attached to the upper end of the stringer, said landing having a substantially flat surface, the upper landing for connecting to a second prefabricated stair within the first prefabricated stair tower module; f. A plurality of support members structurally connected to the upper landing, said support members having a plurality of second connection points whereby the second connection points cooperate with the first connection points and connect the first prefabricated stair tower module to the inside of the wind tower.