ZUR VERWENDUNG MIT VERBUNDBAUHOLZ GEEIGNETE DECKSCHRAUBEN

摘要

A deck screw and an installation method is intended for use with composite lumber, although it can be used with other products. The deck screw may be provided with a head and a shaft that has two regions of varying diameter. The upper region has threads that exceed the number of threads of the lower shaft, on a unit length basis. The threads of the upper shaft may be configured in an inverted buttress design. The lower region of the shaft terminates at a tapered distal end having a pointed tip that leads the screw through the wood material. The head of the screw is provided with an upper surface, a lower surface, and a crown that extends around the perimeter of the head. The crown extends beyond the lower surface of the head, forming a recessed region between the lower edge of the crown and the shaft of the screw. During installation the geometry of the deck screw functions to direct and capture displaced composite material to prevent volcanoing.