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A typical
curved sheet in Plastisol |
This grain silo was
constructed using curved galvanised 3" corrugated steel
sheets in various gauges. |
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A pack of curved corrugated
Plastisol Roofing Sheets in 13.5 x 3" corr. x 0.7mm
thick |
For
curved roofs such as Dutch Barns, Nissan Huts, Romney Huts and Belfast
Hanger Roofs as well as in the restoration of Victorian Industrial
Architecture. Used also for circular Grain Bins, Silos, Pig Arks
and Circular Water Tanks.
The demand for curved
sheets has in the past been mainly for galvanised steel sheets, but
with the upturn of interest
in Industrial Heritage and modern designs, we are witnessing an increased demand
for Plastisol and Polyester coated curved steel sheets.
SLE Cladding Ltd can supply 0.7mm
curved corrugated in a 10 x 3" corr and
13.5 x 3" corr. With curved sheets it is standard
practice to double side lap the sheets for a better seal, this
reduces the effective coverwidth of a 10 x 3" corrugated sheet to
2ft 3" (685mm)
The tightest radius that
sheets can be curved to is :- Prime Quality, radius 3ft.
(914mm). Maximum length = 16ft (4.88 m). Superior Seconds Quality, radius
10ft (3.050m). Maximum length =
12 ft 6" (3.81m).
Required
Measurements :Length
from A to B and C to D, plus the length of sheets required. Maximum
curving
lengths are as per above.
Measuring. To
enable SLE Cladding Ltd to produce curved sheets to the
required length & radius, we require accurate measurements as per
above. Measuring the end of a building can be a dangerous
occupation. A safer method if an undamaged curved sheet off the
building is available, is to place it on level ground and take the
measurement off the curved sheet.
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10 x 3" Corrugated Iron
Profile |
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13.5 x 3"
corrugated Iron Profile. Note the extra .5 corr upturn on the
R.H. end |
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Re-roofing Curved Roof Dutch Barns.
On close
examination of some old agricultural barns, owners may be shocked to find that
their barn roof is supported by only a few light steel trusses,
timber eaves beams and a light wooden purlin at "top dead centre". The roof
will consist of narrow 8 x 3" corr. sheets (2ft coverwidth) x approx.
5ft long, taking 5 or more sheets to complete a curve. The roofs
strength is achieved by double lapped sheets and joined together
by two rows of closely spaced hot rivets around all edges.
The cost
of replacing like with like in this day and age would be phenomenal,
that is why we strongly recommend the fitting of 2 more wooden
purlins at 10 and 2 o'clock and using only 3 no. sheets to complete
a curve. Sheets should be laid working towards the prevailing wind.
They should be double sidelaped and may also be seam stitched around
all edges with Tek seam stitchers for greater security against wind. We
recommend that this method of sheeting is discussed with your
roofing contractor before placing an order for sheets.
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