Static structures (e.g. – buildings) – Lapped multiplanar surfacing; e.g. – shingle type – Interfitted sections
Patent
1995-01-03
1997-04-01
Friedman, Carl D.
Static structures (e.g., buildings)
Lapped multiplanar surfacing; e.g., shingle type
Interfitted sections
52518, 52542, 52555, E04D 118, E04D 330
Patent
active
056155271
DESCRIPTION:
BRIEF SUMMARY
This invention relates to roof tiles and in particular to roof tiles formed from thin sheet material.
A problem associated with ceramic and slate roof tiles is their inherent lack of flexural strength and brittleness, particularly in the case of roofing slate, so that rooves made from slates or tiles can be easily damaged by persons walking over the roof.
A further problem associated with large slates and roof tiles in that due to their weight should they come loose from the roof and fall to the ground, they are extremely dangerous and could cause injury or death if a falling tile should strike a person or animal.
In the past fabricated roof tiles have been formed from heavily filled plastic materials, such as P.V.C., coloured to appear like slates. However, these tiles are again brittle and will easily snap into pieces if subject to flexural loads for example by persons walking on them during maintenance. Flat thin sheet metal roof tiles could be used but such tiles whilst not being brittle will tend to bend and distort when walked upon.
The present invention provides a roof tile which overcomes the above problems.
Accordingly there is provided a sheet metal roof tile which in use co-operates with other such roof tiles for laying in rows upon a roof such that tiles in one row overlap the upper portions of tiles in a lower row, and are themselves overlapped by the pans of tiles in an upper row, characterised in that the sheet metal tile is formed with at least one offset strengthening portion raised out of the plane of the tile and which in use acts as support to a pan of an overlapping portion of another tile.
The invention also comprises a roof covering comprising a plurality of roof tiles of the above type arranged side-by-side in a single row , the tiles being formed as a single sheet metal pressing and being connected at their lateral edges.
The invention will be described by way of example and with reference to the accompanying drawing in which:
FIG. 1 is a plan view of a tile according to the invention,
FIG. 2 is a section on the line II--II of FIG. 1,
FIG. 3 is a section on the line III--III of FIG. 1,
FIG. 4 is a sketch showing the overlapping arrangement between two rows of tile, and
FIG. 5 is a roof covering comprising two side-by-side tiles in a single sheet metal pressing.
With reference to FIGS. 1 to 3 there is illustrated a roof tile formed from a sheet metal pressing, preferably from sheet steel having a thickness of between 0.5-0.9 mm, or sheet aluminium.
The tile 10 shown is a rectangular tile having a length of 20 7/8" and a width of 10 5/8" (530 mm .times.270 mm) however, other sizes and shapes could be selected.
The tile 10 has a substantially flat body portion 12 which has a turned down peripheral flange 11 around its outer edges.
The flange 11 comprises an inclined bottom flange 11a along the bottom edge of the tile 10 (that is the bottom edge in use when secured on a roof), substantially vertical side flanges 11b, 11c, and a top edge flange 11d. The peripheral flange 11 is about 6 mm in depth and serves two purposes, it strengthens the outer edge margins of the tile 10 and it also gives an appearance of "body" or thickness to the roof tile when viewed from the ground.
The tile 10 has an upper portion 12A which is reinforced by offset portions swaged out of the metal sheet, and a lower portion 12B of the tile which forms a substantially flat pan of the tile.
The upper surface 13 of the lower half of the tile is painted to look like slate, for example, with a layer of powder coated paint 13 which can be formed with an artificial grain effect to enhance its slate like appearance. Alternatively it can be coloured to look like other traditional roof covering materials such as concrete or clay tiles.
The upper portion 12A of the tile 10 has raised bosses 14 formed as a pair of spaced apart offset portions 14 raised above the general plane of upper surface of the pan 12B and the center portion of the upper portion 12A which together, define a primary plane of the tile. The two offset porti
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Friedman Carl D.
Germain Lee A.
Milliken Paul E.
Wilkens Kevin D.
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