Static structures (e.g. – buildings) – Inclined top cover – On existing roof
Patent
1978-09-14
1980-02-12
Bell, J. Karl
Static structures (e.g., buildings)
Inclined top cover
On existing roof
52223R, 52222, 52638, 52643, E04C 302
Patent
active
041876520
ABSTRACT:
Roof coverings may comprise one, two, three or more roof trusses including top and bottom longitudinal chords, diagonal rods and vertical posts by means of which the top chord is connected with the bottom chord. The roof trusses are interconnected by means of transverse bracing at distances sufficient to ensure lateral rigidity. Top and bottom abutment girder members are mounted at the ends of the top and bottom chords, respectively. Top and bottom purlins are arranged between the top and bottom abutment girder members at the same levels therewith in panel points of roof truss. The abutment girder members and purlins are secured to said top and bottom chords. Pre-stressed sheet coverings, supported by the abutment girder members and purlins, are secured to said members and purlins and to the longitudinal chords, with the abutment girder members keeping the sheet coverings tensioned and the longitudinal chords compressed. In an embodiment with two roof trusses, the top and bottom chords of each truss are made sectional lengthwise, with the connections between the sections made rigid. In an embodiment with three roof trusses, the top chord of each truss is made up of two longitudinal sections arranged in parallel with each other, one of said sections of the top chord of one of the trusses being connected with the other section of the top chord of another truss nearest it by means of abutment girder members, purlins and sheet covering, all forming a substantially flat panel extended in the longitudinal direction, while adjacent longitudinal sections of the top chord of each truss, belonging to the two adjoining panels, are interconnected by means of gusset plates provided between adjacent sections of the top chord, in places where the diagonal rods and vertical posts are attached to said top chord of each truss.
REFERENCES:
patent: 2753601 (1956-07-01), Brunton
patent: 2943366 (1960-07-01), Sanford
patent: 3019861 (1962-02-01), Rasch et al.
patent: 3058549 (1962-10-01), Anderson
patent: 3156018 (1964-11-01), Slayter
patent: 3352070 (1967-11-01), Raynes
patent: 3708928 (1973-01-01), Gaspers
patent: 4100708 (1978-07-01), Bobrovnikov et al.
Bobrovnikov Anatoly P.
Glushkova Nina N.
Golubeva Tamara N.
Mikhailov Gennady G.
Soloviev Gennady I.
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