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| Offices
– Public buildings |
Configuration
Granab Subfloor System 7000 incl. 22-mm
chipboard & 15-mm parquet. Light weight
wall erected continuously on Granab system
incl. surface layer.
Measurement results
Impact sound: Lnw 59 dB Airborne sound: Rw 56 dB
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 Impact
and airborne sound insulation
Granab subfloor system are installed in many office projects.
Flexible line routing between subfloors and floor coverings
entails major benefits while at the same time, the Granab
system creates a good acoustic environment.
Granab systems fulfil the acoustic requirements for offices
in accordance with SS 25268 by a very wide margin.
Pleasant, comfort-adapted floors for a better
working environment
In a good working environment, it is important that floors
are not hard or rigid, which can lead to pain in the shoulders,
back and legs. Granab systems, with their integrated steel-dampening
effect, provide comfortable floors with documented degree
of deflection for point loads.
Acoustic requirements, offices, according to SS 2
52 68
Airborne
sound insulation, in accordance with
SS 2 52 68 Lowest total airborne sound insulation between
spaces Rw (dB) |
Type
of space |
Sound
class B |
Sound
class C |
| Office room |
35 |
35 |
| -"- along corridor |
30 |
30 |
| Interview/conference room |
44 [1] |
44 |
| -"- along corridor |
35 [2] |
35 |
1) For special requirements,
48 dB.
2) For rooms with glazed walls, 5 dB lower is acceptable. |
Impact
sound insulation, in accordance with
SS 2 52 68 Highest impact sound level between different
spaces, L´nw (dB) |
| Type of space |
Sound class B |
Sound class C |
Office room, Conference room, break room..
– along corridor |
64 |
68 |
| from other space |
60 |
68 |
|
Example
– Planning Electrical, datacom,
telecom – Offices
 System
description – Electrical
Granab subfloor systems permit distribution of supply systems
for power, telecom, datacom, etc. Premises larger than 1000–
2000 m2 are divided into supply zones.
Spaces – Central units
The supply zone is equipped with a fixed unit (so-called island
with toilettes, etc.) where central units for power, telecom,
datacom, fire alarms, etc. are placed.
Canalisation – Line routes
Ledningsnäten förläggs på kabel- och/eller
trådstegar under The cable networks are run on cable
trays or baskets under the floor along a primary route from
the central units and on to the supply zone. The floor is
equipped with access hatches over the route. From the primary
route, the cables are run in installation conduits to the
equipment locations (outlets).
The system can be potential equalised. |
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Granab
subfloor system installed in the Kv. Stallet project, Stockholm
Remodelling into offices, library and other public premises |
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