Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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ROOP TILE SECURING MEANS
Thi~ invention relates to an improved tile rooflng sy~tem and
in partic1~lar to an improved means for securing together roof
tiles in the laying of same to form a tile roof.
S It is well known for new tlle roof6 to be assembled by laying
the upper end of each tile to re~t directly upon a support
batten while the lower end of each tile lies upon the upper or
head end of one or more tiles in the next lower course.
Normally some of the tiles ln a roof are held down by fasteners
such as, for example, a nail which is driven through a nail
clearance hole near the upper or head end of the tile into the
6upporting batten. It is also custo~ary for some of the tiles
to be held down by means of a tie wire arranged to extend
through a lug projecting downwardly from the underside of the
tile and is tied a~ound the batten supporting tke upper or head
end of the tile. Whether nails or tie wire~ are u~ed, such
hold-down devices for one tile serves also to hold down the
tiles which overlap it~
.
It has been found however that such roof tile systems are
generally not satisfactor,v in conditions where the roofs are
~ubjected to extremely severe uplift wind forces, e.g. in
cyclonic or tropical areas, in that if one tile is uplifted and
separated from the others, normally a significant portion of
the roof i8 also 106t (i.e. a chain reaction effect). The
reason for thls is possibly due to the fact that e~isting
arrangements are genesally effective only to tie down the upper
or head end of the tile - not the lower or tail end. Thus ln
the event of high wind forces on the tile, a leverage effect
3C occurs which causes the lower or tall end of the tile to be
uplifted and in turn the tie-down device being detached.
The applican is also aware of variou~ attempts to replace the
nail and tie wire hold-down devices wlth securing cllps.
However, whilst such clip8 are designed to secure or hold down
the tiles near their lower or tall end, the installatlon of the
clip~ ls both labo1~r intenslve and tlme-consumlng and ge~erally
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~ot favoured by roof installers. Particularly it has been
found that the tiles cannot be laicL without the installer
having to work both outside of and within the roof space.
It is the main object of the preserlt invention to provide an
i~proved roof tile securing ~ystem which is effective to anchor
or hold down the lower or tail end of a tile without the ~eed
for any separate hold-down or fixi~g member such as a clip,
nail or tie wire.
It is a further object of the present invention to provide
improved roof tile securing ~eans which will allow a tile roof
to be assembled simply and quickly and in a more co~t effective
~nn~r than with known roof tile systems.
It is a further object of the present invention to provide an
improved roof tiling system whereby tiles can be readily and
securely mounted on roofing battens and, when so ~ounted, will
be able to withstand the forces caused by gale force wind6, and
will not result in a portion of the roof being n lost~ if in the
unlikely event an individual tile should be uplifted and
8 eparated.
According to this invention therefore, there is provided
improved means for securing roof tiles to a roof structure
comprising a tile support batten having an upst~n~;nq web, an
upper flange exte~ding to one side of said web, and a lower
flange extending to the other side of said web, the flanges
bei~g approximately pasallel, said lower flange being adapted
for securement to the roof structure, e.g. rafters, a roof tile
having an upper or head end portion supported on the upper
surface of said lower flange of one tili~g batten, a~d a lower
or tail end portion which is supported by the upper flange of
an adjacent lower batten, said lower or tail end portion
overlapping the upper or head end portion of an adjacent lower
tile, groove or slot forming walls forming a~ upper flange
locating groove or slot on the underside of the tile near to
and facing in the direction of its lower or tail end portion,
sald upper flange of the batten belng arranged to slidably
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engage within said groove or slot, whereby with the upper
flange so engaged, the lower or ta:il end portion of the tile i6
restrained against upward lifting rnovement.
Preferably, said tile support batten is formed as an integral
metal strlp of approximately Z eross-sectional shape.
Preferably, the groove or slot extends continuously across the
underside of the tile and lies in a plane approximately
parallel to the plane of the tile.
In another preferred form of this invention, each tile is
moulded with a lug formation on its underside surface which has
a lug body portion parallel to and spaced from the underside
surface of the tile so as to form said upper flange locati~g
slot or groove.
In yet another preferred embodiment of the invention, each of
the tili~g battens is a roll formed strip of galvanised steel
or other metal, the width of the upper flange being less than
the width of the lower flange which is preferably secured to a
roof rafter by means of fastening nails. Preferably the lower
flange is provided with a raised stiffening rib formation
having a flattened upper ~urface on which rests an underside
surface portion of the upper or head end of a tile.
~he interengagement of the tiles along their side margins is in
accordance with known art, and the tiles are laid in a
conventional manner where an upper tile is laid so as to
overlap a pair of adjacent lower tiles.
Preferably, the underside of each of the tiles is approximately
planar which is in mar~ed contrast to existing tile designs.
~he upper surfaces of the tiles may be patterned as desired.
In order to more fully explain the applicant's invention, two
embodlments are described hereunder in some further detail and
with reference to the accompanying drawings, wherein:
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FIG. 1 ls a perspective ~iew of a roof a~sembly formed in
accordance with one e~bodiment of the invention;
FIG. 2 is a partly sectioned side elevational view of FIG. 1;
FIG. 3 is an enlarged fragmentary view similar to FIG. 2;
FIG. 4 is a sectional view taken along the lines A-A of FLG. 2
(omitting the batten);
FIG. 5 is a perspective view of one of the tiles shown in
FIG. 1;
FIG. 6 is a fragmentary sectional ~iew of a roof tile formed
according to another embo~;msnt of the invention, and
FIG. 7 is a perspective view of an anchorage plate embedded in
the tile 6hown in FIG. 6.
In the em~o~;ment illustrated in FIGS. 1 to 5, reference 18
made to a roof assembly comprising timber rafters 10 on which
are supported a plurality of elongate tiling battens 11 which
in turn 6upport rows of interlocked roof tiles 12 (some of
which are patter~ed, others not), each upper tile 12 being
arranged to overlap a pair of adjacent lower tiles 12 in
accordance with known art. FIG. 1 shows the battens 11 secured
to rafters 10 as well as to an existing iron roof where the
tiles 12 are laid thereover.
Each of the tiling battens 11 is a roll formed strip of
galvanised steel of approximately Z cross-sectional shape
defined by an upper planar flange 13, an oppo61tely directed
lower flange 14, and an upst~ g or approximately vertical
web 15-which interconnects the fla~ges 13, 14. In tbis
embodiment the upper flange 13 has a width smaller than the
width of the lower fla~ge 14. The battens 11 are secured to
the rafters 10 by mean~ of nails 16 which are driven through
the lower flange 14 of each of tbe battens 11.
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Each of the tiles 12 i~ a rectangular ~haped approximately
planar moulding having a locking lug 17 projecting from the
underside surface thereof near its lower or tail end. In this
embodiment the locking lug 17 has a lug body portion 17' which
extends approximately parallel to the underside of the tile 12
and is spaced therefrom so as to form a flange receiving groove
or slot 18 which extends continuously across the underside
surface of the tile 12, the width and depth of the groove or
slot 1~ being sufficient to slidably accommodate the upper
flange 13 of a tiling batten 11 to thereby interlock the tile
to the tiling batten. Preferably the end face of the lug 17,
when in the interlocked condition, is contiguous with the
batten web 15. It will of course be appreciated that the lug
17 need not extend continuously across the underside of the
tile and may, for example, comprise a series of spaced
individual lug formations on the tile underside surface.
As shown in FIG~. 1 to 3, each of the tiles 12 has its upper or
head end portion resting o~ the lower flange 14 of one tiling
batten 11 and its lower or tail end portion resting on the
upper flange 13 of the next lower tiling batten 11 and
overlapping the upper or head end portions of a pair of
adjacent lower tiles 12, the upper flange 13 of the next lower
tiling ~atte~ 11 lockingly engaged within the slot or groove 18
of the tile 12.
With this arrangement each tile can be simply and quickly laid
in po~ition without the need for additional tie-down devices
such as nails or tie wires. The interlocking engagement
between the upper flanges 13 of the battens 11 and the groo~es
or slots 18 on the tiles 12 effectively anchors the lower end
portions of the tiles and renders the upliftlng thereof, e.g.
by wi~d forces unlikely. Of course the upper or head end
portions of the tiles are effectively restrained by the
overlapping portions of the adjacent higher tiles.
As shown in FIG. 3, each of the lower flanges 14 of the tiling
battens 11 is provided with an approxi~ately centrally located
raised stlffening rib formation 20 extending longitudinally
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thereof, the rib 20 having a flattened upper surface which
forms a seating surface for the upper end portion of a tile 12
which is supported thereon. The flattened upper surface is
inclined with respect to the plane of the lower flange 14, the
slope being in accord with the slope of the roof. The height
of the rib formatlon 20 is designed so that the upper surface
of the upper end portion of each tile is contiguous with the
underside surface of an overlapping portion of an adjacent
higher tile.
As also shown in FIG. 3, the upper surface of each of the tiles
12 is formed with a transversely extending groove 22 adjacent
' its upper end portion and which is overlapped by the lower end
portions of a pair of adjacent higher tiles. The groove 22
forms a well a~d reduces the likelihood of any water, e.g.
rai~, seeping between the tiles and entering the roof space.
In the embodiment shown in FIGS. 6 and 7, each tile 25 has
embedded therewithin a plurality (preferably two) of
transversely aligned a~chorage plates 26 projecting fro~ the
underside of the tile 25, the plate 26 having a pro~ecting
flange 27 which together with the tile underside surface forms
a locating groove or slot 28 displaced from the plane of the
tile and facing in the direction of its lower end portion. The
slot 28 is sized and shaped to receive the upper flange 13 of
the tiling batten 11. Preferably, each tile has two such
plates 26, one adjacent each side thereof. Referring to
FIG. 7, each plate 26 is formed with an opening 2g in its inner
flange 30 to ensure its secure anchorage in the tile during
moulding thereof. The plates 26 can be formed of plate metal.
The actual laying method for the roof tiles of this invention
will of course be self-evident as will the simplicity and the
quickness of such method.
~o~
A brief consideration of the a~ove-described embodiment will
indicate that the invention provides for an extremely simple
and effective roof tiling 6ystem wherein the roofing tiles are
securely fastened in such a manner that the likelihood of their
S being uplifted by high velocity winds is ~1 n1 m~l .
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