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Design information regarding installation on pitched roofs — above roof installation
14.3 Above roof installation with rafter flanges
General information
■ This mounting system is suitable for plain tiles and slate tiles. It is
designed for wind speeds up to 150 km/h and snow loads up to
1.25 kN/m
2
.
■ The mounting system comprises rafter flanges, mounting rails,
clamping brackets and screws.
■ The rafter flanges can be directly secured to the rafters, the battens
or counter battens, or to the timber shell.
■ Guarantees a permanently safe application of force to the roof struc-
ture. This reliably prevents tile breakages.
■ In conjunction with above roof insulation, secure the rafter flanges
on site.
For this, the screws must reach at least 80 mm into the load bearing
wood structure to ensure sufficient load bearing capacity.
■ Any unevenness in the roof can be compensated for by adjusting the
rafter flanges.
Criteria for selecting the fixing system:
■ Roof cover
■ Snow load
B Rafter flange
E Rafter
14
VIESMANN
120
B
E
B
B Rafter flange
F Seal (fully affixed)
(cont.)
F
VITOSOL
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