US 6,665,991 B2 · Seam plate for retaining roof decking membrane

Abstract

A stress plate or seam plate for use in connection with securing membrane sheets to underlying roofing decking substructure comprises a circular disk having a central aperture for receiving a screw fastener. A plurality of concentric ribs are defined between the central aperture and the peripheral edge of the plate for providing reinforcing and bending or flexibility characteristics to the stress plate or seam plate, and in accordance with the principles and teachings of the present invention, a plurality of circumferentially spaced, downwardly extending projections having substantially V-shaped cross-sectional configurations are provided upon the underside of the seam or stress plate so as to engage the membrane sheets and retain the same at their desired locations upon the underlying roofing deck substructural assembly. Contrary to conventional stress plates having sharp-pointed prongs or tangs, the projections of the present invention have substantially rounded or radiused apices so as not to puncture or rupture the membrane sheets.

Claims35

Dependent claims

A seam plate for securing a membrane sheet to an underlying substructure, comprising:

a plate;
an aperture defined within a central portion of said plate for receiving a fastener for securing said plate to an underlying substructure;
and
a plurality of projections, respectively severed from said plate along first opposite regions, integrally connected to said plate along second opposite regions, and having rounded engagement portions extending downwardly from said plate, and continuously between said second oppositely disposed integrally connected regions, for engaging a membrane sheet so as to effectively secure the membrane sheet to the underlying substructure without piercing the membrane sheet so as not to cause tearing and rupture of the membrane sheet when said plate is fixedly secured to the underlying substructure by the fastener.

1 more element

In combination, a roof decking substructure assembly, comprising:

a roof decking substructure;
a first membrane sheet having a first end portion which is adapted to be secured atop said roof decking substructure;
a second membrane sheet having a second end portion which is adapted to be overlapped and secured to said first end portion of said first membrane sheet so as to form a seamed connection with said first membrane sheet;
a seam plate for securing said first end portion of said first membrane to said roof decking substructure;
and
a fastener for securing said seam plate to said roof decking substructure;
said seam plate having an aperture defined within a central portion thereof for receiving said fastener for securing said seam plate to said roofing decking substructure;
and a plurality of projections respectively severed from said seam plate along first opposite regions, integrally connected to said seam plate along second opposite regions, and having rounded engagement portions extending downwardly from said seam plate, and continuously between said second oppositely disposed integrally connected regions, for engaging said first end portion of said first membrane sheet so as to effectively secure said first end portion of said first membrane sheet to said roof decking substructure without piercing said first end portion of said first membrane sheet so as not to cause tearing and rupture of said first end portion of said first membrane sheet under wind uplift conditions when said seam plate is fixedly secured to said roof decking substructure by said fastener.

5 more elements

Dependencies are inferred from the claim text.

Seam plate for retaining roof decking membrane

Life of this patent

Seam plate for retaining roof decking membrane

Life of this patent

Abstract

Claims35