Static structures (e.g. – buildings) – Lapped multiplanar surfacing; e.g. – shingle type – With spacing or space-forming feature
Patent
1986-02-10
1987-05-05
Bell, J. Karl
Static structures (e.g., buildings)
Lapped multiplanar surfacing; e.g., shingle type
With spacing or space-forming feature
52478, 52518, 52533, E04D 100
Patent
active
046621415
ABSTRACT:
The invention relates to a roofing element, in particular a concrete roofing panel, at whose underside extend a suspension ledge and a base rib, while at least two cross ribs of lesser thickness than the base rib extend in the covering or overlapping region next to the base rib and parallel thereto, with the basic surface of the base rib extending parallel in relation to the outer surface of the roofing element. For increasing the tightness of the roofing element, the thickness of the roofing element of optionally S-shaped or wave-shaped cross section in the apex of the cross rib farthest removed from the base rib is slightly, up to 6 percent at the most, less than the thickness of the roofing element in the base rib and the height of further cross ribs disposed between the base rib and the cross rib farthest removed from the base rib is less than the height of the cross rib farthest removed from the base rib.
REFERENCES:
patent: 1931709 (1933-10-01), Schaffert
patent: 2210941 (1940-08-01), Leemhuis
patent: 3862532 (1975-01-01), Markos
patent: 4432183 (1984-02-01), Pike et al.
Bell J. Karl
Eternit-Werke Ludwig Hatschek Aktiengesellschaft
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