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US 8,316,621 B2Granted
Cold formed roof and columns building structure system
OwnerKamal Safari Kermanshahi, Haddad Miladi +3inventors
InventorsKamal Safari Kermanshahi, Haddad Miladi, Abolghasem Rastgoo, Kamran Safari Kermanshahi, Koroush Safari Kermanshahi
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Abstract
An improved roof structure formed of metal sheet s. The structure comprises a plurality of cold formed columns supported by a concrete foundation, a plurality of cold formed girders supported by the plurality of columns, a plurality of cold formed beams supported by the plurality of girders, a plurality of cold formed open web joists supported by the plurality of beams, and a plurality of polystyrene roof boards supported by the plurality of joists.
Claims20
A roof structure comprising:
- (a) a plurality of cold-formed columns, each column comprising a pair of vertical posts attached to each other in juxtaposition, each post of a substantially tapered I-beam cross section comprising an elongate vertical column web interconnecting a pair of column flanges wherein the outer vertical surfaces of the column flanges are horizontal, the cross-section of each column symmetrical about central horizontal and vertical axes;
- (b) a plurality of cold-formed girders supported by the plurality of columns, each girder of a substantially tapered I-beam cross section comprising an elongate girder web interconnecting a pair of upper and lower girder flanges wherein the top and bottom surfaces of the girder flanges are horizontal, the cross-section of each girder symmetrical about central horizontal and vertical axes;
- (c) a plurality of cold-formed beams supported by the plurality of girders, each beam comprising a tapered I-beam comprising an elongate beam web interconnecting a pair of upper and lower beam flanges wherein the top and bottom surfaces of the beam flanges are horizontal the cross-section of each beam symmetrical about central horizontal and vertical axes;
- (d) a plurality of open web joists supported by the plurality of beams, each joist comprising a cold-formed upper chord, a cold-formed lower chord, and a triangulated open web interconnecting the upper and lower chords wherein, the open web comprises a plurality of angled open web members, each open web member interconnecting the upper and lower chords by means of forging, the cross-section of each joist symmetrical about a central vertical axis;
- and
- (e) a plurality of roof boards supported by the plurality of joists.
3 more elements
Dependencies are inferred from the claim text.