Composite structural panel
First Claim
1. A structural panel comprising a thin substantially rectangular member of preselected length, width and thickness supporting a substantially flat upper surface and a peripheral flanged edge, said member supported on the lower surface thereof by a first plurality of substantially evenly spaced transverse ribs subtending the width of said member and a second plurality of substantially evenly spaced longitudinal ribs subtending the length of said member, said second plurality being greater than said first plurality, and at least one pair of intersecting diagonal ribs extending from respective diagonal corners of said member, said member and ribs comprising a molded unitary structure of a composite material composed of plastic, comminuted cellulosic matter or glass fibers, and a flame retardant.
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Accused Products
Abstract
A structural panel is described which includes a thin substantially rectangular member of preselected length, width and thickness having a substantially flat upper surface and a peripheral flanged edge and supported on the lower surface thereof by a first plurality of evenly spaced transverse ribs and a second greater plurality of evenly spaced longitudinal ribs, and at least one pair of intersecting diagonal ribs extending from diagonal corners of the member, the panel being hot formed of a composite of plastic, about 20 to 25 weight percent comminuted cellulosic matter or glass fibers and about 3 to 5 weight percent flame retardant.
48 Citations
13 Claims
- 1. A structural panel comprising a thin substantially rectangular member of preselected length, width and thickness supporting a substantially flat upper surface and a peripheral flanged edge, said member supported on the lower surface thereof by a first plurality of substantially evenly spaced transverse ribs subtending the width of said member and a second plurality of substantially evenly spaced longitudinal ribs subtending the length of said member, said second plurality being greater than said first plurality, and at least one pair of intersecting diagonal ribs extending from respective diagonal corners of said member, said member and ribs comprising a molded unitary structure of a composite material composed of plastic, comminuted cellulosic matter or glass fibers, and a flame retardant.
- 8. A structural panel comprising a thin substantially rectangular member of preselected length, width and thickness supporting a substantially flat upper surface and a peripheral flanged edge, said member supported on the lower surface thereof by a first plurality of substantially evenly spaced transverse ribs subtending the width of said member and a second plurality of substantially evenly spaced longitudinal ribs subtending the length of said member, said second plurality being greater than said first plurality, and at least one pair of intersecting diagonal ribs extending from respective diagonal corners of said member, said member and ribs comprising a molded unitary structure of a composite material composed of plastic containing 20 to 25 weight percent comminuted cellulosic matter or glass fibers and 3 to 5 weight percent flame retardant.
Specification