Glass-fiber-reinforced gypsum roof deck

Claim 2

A roof deck structure comprising a plurality of tray units of glass-fiber-reinforced gypsum, and decking units also of glassfiber-reinforced gypsum mounted above and secured thereto, the decking units each have an effective width twice the width of a tray unit and each comprises a substantially flat web, a central pedestal constituted by a thickened region of said web, and end connection portions; the connection portion at one end comprising a terminal shoulder extending horizontally from and beneath the flat web, and a channel extending lengthwise of the tray unit between said web and said terminal shoulder; and the connection portion at the other end comprising a thickened rib integral with the web, a tongue extending horizontally from said thickened rib and terminating with a depending rib which engages in a channel of the adjacent decking unit with said tongue resting upon the terminal shoulder of the adjacent decking unit.

Claim 3

A roof deck structure comprising a plurality of tray units assembled side by side above roof supporting beams, each such tray unit being fabricated from glass-fiber-reinforced gypsum and including a generally horizontal flat base, generally vertical side walls and horizontal flanges extending inwardly from the tops of the said side walls over the said flat base; and also including a plurality of decking units disposed above the said tray units, each of the said decking units having an effective width which is twice the width of the tray unit and each decking unit comprising a substantially flat web, a central pedestal constituted by a thickened region of the said web, and end connection portions; the end connection portion at one end comprising a terminal shoulder extending horizontally from and beneath the flat web, and a channel extending lengthwise of the tray unit between the said web and the said terminal shoulder; and the end connection portion at the other end comprising a thickened rib integral with the web, a tongue extending horizontally from said thickened rib and terminating with a depending rib which engages in a channel of the adjacent decking unit with the said tongue resting upon the said terminal shoulder of the adjacent decking unit; fastening means extending between a said horizontal flange and the said central pedestal; and fastening means extending between a said horizontal flange and the said thickened rib.

Claim 4

A roof deck structure comprising a plurality of tray units assembled side by side above roof supporting beams, each such tray unit being fabricated from glass-fiber-reinforced gypsum and including a generally horizontal flat base, generally vertical side walls and horizontal flanges extending inwardly from the tops of the said side walls over the said flat base; and also including a plurality of decking units disposed above the said tray units, each of the said decking units having an effective width which is twice the width of the tray unit and each decking unit comprising a substantially flat web, a central pedestal constituted by a thickened region of the said web, and end connection portions; the end connection portion at one end comprising a terminal shoulder extending horizontally from and beneath the flat web, and a channel extending lengthwise of the tray unit between the said web and the said terminal shoulder; and the end connection portion at the other end comprising a thickened rib integral with the web, a tongue extending horizontally from said thickened rib and terminating with a depending rib which engages in a channel of the adjacent decking unit with the said tongue resting upon the said terminal shoulder of the adjacent decking unit; fastening means extending between a said horizontal flange and the said central pedestal; and fastening means extending between a said horizontal flange and the said thickened rib.

Claim 5

The roof structure of claim 2 wherein the top of each decking unit is coated with a layer of foamed organic plastics and a layer of weather-resistant plastic coating is applied to the top of the said layer of foamed organic plastics.

Claim 6

The roof deck structure of claim 3 wherein a layer of roofing felt is applied to the top of the said weather-resistant plastics coating.

Claim 7

A roof deck structure comprising a plurality of thin-wall tray units of glass-fiber-reinforced gypsum, and preformed, generally flat decking units also of glass-fiber-reinforced gypsum mounted above and secured thereto, said decking units presenting overlapping longitudinal edge portions which overly a longitudinal edge portion of a subjacent tray unit and which are secured thereto.

Claim 8

A roof deck structure comprising a plurality of thin-wall tray units of glass-fiber-reinforced gypsum, and preformed, generally flat decking units also of glass-fiber-reinforced gypsum mounted above and secured thereto, said decking units presenting overlapping longitudinal edge portions which overly a longitudinal edge portion of a subjacent tray unit and which are secured thereto.

Claim 9

The roof deck structure of claim 5, wherein said tray units have a horizontal flat base, vertical side walls, and horizontal flanges extending inwardly from the tops of said side walls over said flat base.

Claim 10

The roof deck structure of claim 5, wherein said decking units include substantially flat top surfaces, a layer of foamed plastics material covering the top surfaces of the glass-fiber-reinforced gypsum, and a layer of weather-resistant plastics material applied to the top of said layer of foamed plastics material.

Claim 11

The roof deck structure of claim 7, wherein the said layer of foamed plastics material is foamed polyisocyanurate.

Claim 12

The roof deck structure of claim 5, wherein said preformed decking units each have a longitudinal edge coincident with a longitudinal edge of one tray unit.

Claim 13

The roof deck structure of claim 5, wherein said tray units are assembled in side abutted relation.

Claim 14

The roof deck structure of claim 5, wherein said tray units are assembled in spaced-apart relation.

Claim 15

The roof deck structure of claim 5, wherein said tray units and said decking units are assembled in mutually parallel relation.

Claim 16

The roof deck structure of claim 5, wherein the space between said decking units and said tray units remains empty.

Claim 17

A roof deck structure comprising a plurality of thin-wall tray units of glass-fiber-reinforced gypsum, and preformed, genrally flat decking units also of glass-fiber-reinforced gypsum mounted above and secured thereto; said tray units having a horizontal flat base, vertical side walls, and horizontal flanges extending inwardly from the tops of said side walls over said flat base, said tray units being assembled in spaced-apart relation; and said decking units each including a substantially flat web, and a central pedestal constituted by a thickened region of said web; one horizontal flange of each tray unit being engaged with and secured to the central pedestal of one of said decking units.

Claim 18

A roof deck structure comprising a plurality of thin-wall tray units of glass-fiber-reinforced gypsum, and preformed, genrally flat decking units also of glass-fiber-reinforced gypsum mounted above and secured thereto; said tray units having a horizontal flat base, vertical side walls, and horizontal flanges extending inwardly from the tops of said side walls over said flat base, said tray units being assembled in spaced-apart relation; and said decking units each including a substantially flat web, and a central pedestal constituted by a thickened region of said web; one horizontal flange of each tray unit being engaged with and secured to the central pedestal of one of said decking units.

Claim 19

A roof deck structure comprising a plurality of thin-wall tray units of glass-fiber-reinforced gypsum, and preformed, generally fLat decking units also of glass-fiber-reinforced gypsum mounted above and secured thereto; said tray units having a horizontal flat base, vertical side walls, and horizontal flanges extending inwardly from the tops of said side walls over said flat base, said tray units being assembled in side abutted relation; and said decking units each including a substantially flat web, and a central pedestal constituted by a thickened region of said web; adjacent horizontal flanges of certain adjacent side abutted tray units being engaged with and secured to said central pedestal.

Claim 20

A roof deck structure comprising a plurality of thin-wall tray units of glass-fiber-reinforced gypsum, and preformed, generally fLat decking units also of glass-fiber-reinforced gypsum mounted above and secured thereto; said tray units having a horizontal flat base, vertical side walls, and horizontal flanges extending inwardly from the tops of said side walls over said flat base, said tray units being assembled in side abutted relation; and said decking units each including a substantially flat web, and a central pedestal constituted by a thickened region of said web; adjacent horizontal flanges of certain adjacent side abutted tray units being engaged with and secured to said central pedestal.