Attachment plate
An attachment plate for securing a roof membrane to a roof deck comprising a generally planar contact surface, at least one aperture for receiving a fastener for securing the plate to the deck with the membrane therebetween, a first reinforcing rib formed by a continuous portion of the plate being raised upward from the contacting surface of the plate and extending at least around the perimeter of the plate, and a gripping edge extending downwardly at the perimeter of the plate from the first reinforcing rib to a plane below the plane in the contacting surface. The plate may be generally square with the aperture located at the center of the plate, and may include a second reinforcing rib which intersects the first reinforcing rib at about the center of each of the sides of the first reinforcing rib.
1. A plate for attaching a roof membrane to a roof deck, the plate comprising:
a generally planar contact surface including at least one aperture for receiving a fastener for securing the plate to a roof deck;
a first reinforcing rib formed by a continuous portion of the plate being raised upward from the contacting surface of the plate and extending around the perimeter of the plate; and
a gripping edge formed from the outer wall of the first reinforcing rib, the gripping edge extending downwardly from at least a portion of the perimeter of the plate to a plane below the plane of the contacting surface, whereby, when the attachment plate is mounted on a roof deck by securing the fastener through the plate aperture and into the roof deck with the roofing membrane located therebetween, the contacting surface of the plate is pressed into contact with the membrane, and the gripping edge of the plate extends downward into and compresses the membrane.
2. The attachment plate of claim 1 wherein the plate is rectangular in shape and wherein the gripping edge is continuous.
3. The attachment plate of claim 2 wherein the plate is shaped generally as a square.
4. The attachment plate of claim 1 wherein the gripping edge is generally wavy in the horizontal plane, thereby providing contact with the membrane along a generally wavy line.
5. The attachment plate of claim 1 wherein the plate includes one aperture located at the plate, and further including a second set of reinforcing ribs which surround the aperture.
6. The attachment plate of claim 5 wherein the second set of reinforcement ribs are interconnected with the first reinforcement ribs.
7. The attachment plate of claim 6 wherein the second set of reinforcing ribs form a square, and wherein the shape is rotated forty-five degrees in the plane of the contact surface and is interconnected with the first reinforcing rib at the center of each side of the first reinforcing rib.
8. The attachment plate of claim 1 wherein the gripping edge extends downwardly at the entire perimeter of the plate to a plane below the plane of the contacting surface.
9. The attachment plate of claim 1 wherein the gripping edge is generally wavy in the vertical plane, thereby compressing the roof membrane to varying depths around the perimeter of the plate.