4-2
| Installation of steel roof of trapezoidal plates in the sizes 10 – 31
connection between rails and unit to prevent rainwater from passing under the rails and into the unit. Mount the rails
A1 and B2 on the front side (the side with the inspection doors) – use the simple self-drilling screws without the sealing
washer – see the illustration of the screw below.
Note:
Rail B2 fits into the rail A1, and this offers the advantage that the rail B2 can be slid inside the rail A1 to
adjust the length of rail B2 accurately to the length of the unit. In this way it is not necessary to spend time
and effort cutting the rail B2
Mount the lower rails C3 and D4 on the back side of the unit.
Note:
Rail D4 fits into the rail C3, and this offers the advantage that the rail D4 can be slid inside the rail C3 to
adjust the length of rail D4 accurately to the length of the unit. In this way it is not necessary to spend time
and effort on cutting the rail D4.
Mount vertical rail – E5 - with the roof slope at each end of the unit
Caution
It is important to place a screw in each hole
– even though the number of holes for screws seems to be
very large, a screw in each hole is necessary as the stress on the roof during stormy weather is extremely
high.
4.1.2
Mount rails. Units of size 16 and units larger than size 16.
On units of size 16 and on units that are larger than size 16, rails A1, B2, C3, D4, E5 must be mounted on the unit for
support of trapezoidal roof plates, but also rails Y and Z must be mounted longitudinally at the centre-line of the units
to hold the trapezoidal roof plates.
Squeeze sealant in sufficient quantity between the underside of the rails A1, B2, C3, D4, E5 and the horizontal top side
of the unit before the rails are mounted. This means that the rails are standing on sealant to achieve the tightest
connection between rails and unit to prevent rainwater from passing under the rails and into the unit. Mount the rails
A1 and B2 on the front side (the side with the inspection doors) – use the simple self drilling screws without the sealing
washer – see the illustration of the screw below.
output |
