Metal ceilings may be perforated for either
architectural or technical reasons.
durlum
metal ceilings can be supplied with various
perforations. Special perforations are also
possible. The number of perforation patterns
grows continually. They may also be adapted
to suit other working widths.
Perforated
metal ceilings can be clad with durlum acoustic
felt. The use of other absorption materials
is also possible, e.g. mineral wool, plastic
foams etc.
The
standard perforations are RG-L08 "Pico Point", RG-L15, RV-L6 and RD-L30. All
other perforations entail additional cost.
Please
note that, with very small hole diameters
< 2 mm (L3), and a very small amount
of residual material, or large open areas,
Moiré effects may occur, which are
visible as light/dark shading.
The
following perforations are not suitable
for fire-protection ceilings: L19d, L17,
L24, L11, L20 and L12. All other perforations
are harmonised with our test certificates.
For other perforations, testing is required
in each case.
