GRANAB SUBFLOOR SYSTEMS
For environmentally friendly and quieter indoor environments with comfortable flooring in homes, offices, schools and public buildings.
Vers
ion
7. O
ctob
er 2
008
Lay
out:
blom
ill.s
e
Pri
ntin
g: R
ydin
s Tr
ycke
ri A
B
GRANAB manufactures subfloor systems for homes, offices,
schools and public buildings. The systems feature steel
floor girders with dampening elements for effective impact
and airborne sound insulation.
Granab subfloor systems are patented and type-approved
with respect to sound-dampening properties, dynamic loads
and strength. About 4 million m2 have been installed in vari-
ous projects. Granab's main office is in Vårgårda, Sweden
with production facilities in both Vårgårda and Lindköping.
Welcome to Granab AB
2 3
Bygg- och Miljöteknik Granab ABPhone: +46 (0) 322-66 76 50 Fax: +46 (0) 322-66 76 55
E-mail: [email protected] www.granab.se
Mailing address: P.O.Box 172 SE-447 24 Vårgårda Sweden
Street address: Verkstadsgatan 4 Vårgårda, Sweden
2 3
CONTENTS:Granab Subfloor Systems 4–5
System 3000 System 7000
Planning instructions 8–9 Testing, certification, approval 10–11
Material properties Alternative floor coverings
Tiled surfaces, bathrooms 14
Bathroom modules 15 Planning
Comfort-adapted deflection 18–19
Impact and airborne sound insulation 20–21
Impact sound reduction in the lab 22–23
Sound insulation measurementsSubfloor HD/F 270 mm, System 3000 24Subfloor HD/F 185 mm, System 3000 25–26Subfloor HD/F 270 mm, System 7000 27
Offices, public buildings Sound insulation, comfort-adapted floors 28 Planning, electrical – datacom – telecom 29
Ventilated subflooring Floor heating
Installation tools, accessories 35
Material specifications
Detailed solutions, installation
Examples of projects 38–39
2 3
Materials, environmental impact, durability 12
Load capacity, c/c distances, girders
System information, dimensions, design 6
System information, dimensions, design 7
Chipboard & carpet, chipboard & parquet,
Moisture, mould, radon 30–31
Addition of levels to existing
structures, attic conversions,
wooden subfloors 34
Waterborne floor heating 32Recessed convectors 33
Systems 3000 and 7000 36
High level, plastic film, door openings 37
parquet, tiles 13
Drawings, delivery optimisation andinstallation drawings 16–17
2 3
Granab subfloor systems provide many benefits:
Granab subfloor systems are constructed with non-deformable floor girders of galvanised steel and an effective sound-dampening resilient system. The subfloor system is secured to the subflooring with screws and set at the desired height. Surface flooring of either parquet, chipboard and parquet, or carpet is laid over the subfloor system. The Granab system contributes to improving the quality and environmental friendliness of homes, schools and public buildings.
4 5
System 3000
System 7000
Effective impact sound dampening and airborne sound insulation for alternative sound classes. Dry installation method. Installed directly on untreated subfloors without wet surface levelling. Provides floors with adapted comfort for better living and working environments. Creak-free floors. The Granab system is environmentally friendly and consists entirely of non-organic materials, and is not affected by variations in humidity or temperature. Structural height from 30 to 420 mm excluding flooring. Special heights up to 1000 mm. Flexible line routing in space between the surface flooring and subfloor. Load capacity/m2 distributed load, 4000 kg. Ventilation systems for ventilated subfloors. Designed for various floor heating systems.
The system facilitates future modifications or renovations. Comfortable, environmentally friendly floors. Low weight. Granab system weight, 5 kg/m2. Compared to conven-tional topping solutions, 100 – 200 kg/m2
Granab Subfloor Systems
Shape permanence
More than 4,000,000 m2 of Granab's patented and type-approved subfloor systems have been installed in homes,
offices, schools, shops and public buildings. Granab systems are type-approved, and tested and certified by the
SP Technical Research Institute of Sweden with respect to sound-dampening properties, dynamic loads, durability
and comfort properties. Granab systems are tested annually in various projects with respect to sound insulation and
deflection properties, and an extensive technology bank with test documentation is available our customers.
InstallationAn installed floor's quality is dependent both on the choice of floor covering, and that the Granab system and the flooring covering are correctly installed. Granab has detailed installation instructions for the Granab systems in a separate pamphlet along with check-lists for installation. Installation of flooring over a Granab system must be carried out in accordance with the flooring manufacturers' instructions. Laminated wooden floors must always be laid under controlled forms in compliance with the range of temperatures and relative humidity percentages stipulated by the respective manufacturers and suppliers of the flooring material.
SubfloorsHollow core slabs: Granab systems are commonly installed on hollow core slabs when the objective is to attain sound class A or B without additional topping (for more information, see pages 20–27).
In situ cast subfloors: With Granab systems, subflooring can be cast thinner. A cast subflooring of approximately 300 mm can be reduced to approximately 200 mm, when structural factors permit, with retained or improved sound insulation. This produces a lighter overall construction and improved overall economy. Flexible line routing in the space between the subfloor and floor covering also facilitates future renovations.
Wooden subfloors: Granab systems are installed directly on wooden subfloors so as to achieve improved impact and airborne sound insulation for the overall construction. Granab systems are, for example, widely used in attic conversions.
Planning and installation drawingsGranab prepares plans and installation drawings for each room or building unit with detailed dimensions and locations of all included girders. See the examples on pages 14 – 15. The girders are cut according to the installation plans and all included adjustment units, including dampening elements, are pre-fitted at the factory. This ensures that all girders receive the right support without deviations.
Granab systems are designed with non-deformable galvanised steel girders. They retain their shape and are not affected by humidity or temperature variations.
Other composite parts in the systems are also made of non-organic materials that do not absorb moisture. Granab systems – with guaranteed shape permanence – elimi-nate. for example, the risk of creaking or sag due to the effects of drying and moisture on girders, which is the case with girders made of organic materials such as wood.
Sound insulation
Comfort
Granab systems provide very effective impact and airborne sound insulation. Granab systems have been tested and type-proved for their sound-insulation properties by the SP Technical Research Institute of Sweden. Granab systems have also been tested in a large number of completed residential projects with respect to impact and air-borne sound insulation for sound class B, as well as sound class A in certain projects.
In a good living and working environment, it is important that floors are not hard or entirely rigid, which can cause pain in the back and legs. Granab systems, with their integrated impact-dampening effect, provide comfortable floors with documented deflection properties for point loads.
4 5
Granab Subfloor System 3000
400 60020 600 600 600 600 600 400
600
600
General installation drawing, Subfloor System 3000 – Residential
Construction heights: Flexible construction heights from 30 to 180 mm, excl. floor covering
With supplementary sheet between the girders
NB: The c/c distance between girders is determined by the choice of floor covering. For other premises, see the c/c distance between floor girders on page 8.
for adjustable heights 30 – 180 mm, excl. floor covering
Section with support block and dampening element, level adjustment screw and concrete anchor
6 7
22-mm parquet, alternatively 22-mm chipboard & 15-mm parquet or carpet
26,5
4517 17
79
Max. height180 mm
MIn. height30 mm
Granab Subfloor System 7000
400 600
600
600
20
600 600 600 600 600 400 20
General installation drawing, Subfloor System 7000 – Residential
Construction heights: Flexible construction heights from 70 to 420 mm, excl. floor covering.Special heights up to 1000 mm with masonite beams on girders (see page 37).
22-mm parquet, alternatively 22-mm chipboard & 15-mm parquet or carpet
for adjustable heights 70 – 420 mm, excl. floor covering
Special heights up to 1000 mm (see page 37)
NB: The c/c distance between girders is determined by the choice of floor covering. For other premises, see the c/c distance between floor girders on page 8.
Section with support block and dampening element, level adjustment screw and con-crete anchor
6 7
Adjustment height
70–420 mm 45
40
8 9
Planning instructions for for various load conditions,Granab Subfloor Systems 3000 and 7000
1. Rooms in dwellings, hotels, hospital rooms and staff rooms, c/c distance, girders (sections), 600 mm.
2. Assembly rooms such as classrooms, rooms in child-care centres, lecture halls, office rooms, premises for restaurants, cafes and dining halls, c/c distance, girders (sections), 400 mm.
3. Open areas in libraries, spaces with fixed seating such as in churches, theatres and cinemas, c/c distance, gird-ers (sections), 400 mm.
4. Spaces without fixed seating in churches, concert halls, theatres, cinemas, museums, exhibition halls, retail are-as in department stores and shops, gyms, sports cen-tres, dancehalls, corridors in schools, etc., c/c distance girders (sections), 300 mm.
Recommended c/c distances between floor girders (sections) and support blocks, Systems 3000/7000:
System 7000
System 3000
Distance from wall, approx.
40 mm
1st – 2nd girders, 400 mm c/c distance between floor girders (sections), 600 mmc/c distance between
support blocks, 600 mm
Distance from wall, approx.
20 mm
1st – 2nd girders, 400 mm c/c distance between floor girders (sections), 600 mmc/c distance between
support blocks, 600 mm
Load capacityFor girder spacing for homes, c/c distance 600 mm = 4 tons/m2
The point load capacity and distributed load of various floor coverings installed on Granab systems are calculated according to the specifica-tions of the respective flooring manufacturers.
8 9
The unique design of the Granab systems – with components of non-organic materials, steel girders, damp-ening elements and adjustment screws in various lengths – permits installation in many different types of projects and entails considerable benefits. The dampening element, which provides progressive resilience, makes the system an excellent choice for floors in sports centres and other multi-purpose areas, for example.The specified load capacity, 4 tons/m2 at c/c 600, can be significantly improved with tighter c/c spacing of both girders and adjustment units.
Planning instructions for various load conditions, Granab Subfloor Systems 3000 and 7000
Granab Subfloor Systems type-approved by the SP Technical Research Institute of Sweden
Granab Subfloor Systems 3000 and 7000 have been tested and certified by the SP Technical Research Institute of Sweden with respect to load capacity, stability and durability with veri-fied values for sound-dampening characteristics.
Granab systems fulfil the requirements of para-graph 2 in the Swedish act (1994:87) on techni-cal properties of constructions for intended usage – BVL.
Certificate and type-approval number 19 21 01, 15 April 2008
Evaluation documentation
Report 97B1, 9804 | Report P302700 | Report P302700A | Report P302700B | Report P302700C Report P302700D | Report P300682 | Report P300682A on dampening pads | IFP Research, 040317 Report, Assessment of flooring system IFP Research, 040206 | Report P302635 | Report P705473 Statement P705473A
10 11
Tested and certified by the SP Technical Research Institute of Sweden
See information on pages 18 – 19
1. Deflection properties
Load testing of the support block was conducted by placing the support block with an adjustment screw between two steel sheets and applying a load using a hydraulic press. Force and defor-mation were registered. During testing, only 10 mm of the adjust-ment screw was threaded into the support block.
2. Load testing, a separate support block/level adjustment screw
10 12
10 12
The deflection test was con-ducted by placing a steel rail in a hydraulic presswith two sup-port blocks fitted at a c/cdis-tance of 600 mm. A point load was thereafter applied on the steel rail between the support blocks. Force and deformation were registered.
3. Deflection testing, section with spliced sheet (without dampening pad)
4. Fatigue testing of installed Granab floor construction
Fatigue testing was conducted over a support block by applying a pulsating load of between 0.1 Fk and 0.6 Fk 10,000 times at a frequency of 1 Hz. Fk was the characteristic value from support block load test-ing. A total of two fatigue tests were conducted over the support blocks at the outer corners of the test floor. The load was pulsated between 0.1 and 0.6 Fk with Fk set at 8.5 kN. Both load tests were conducted without any lasting deformations or damages.
10 11
12
Elastomer, GRAB-310
No environmental impact, recyclable into new polyurethane products
GRAB-310´s resistance to short-term extreme overloads is very high and the material springs back entirely if overloaded.The long-term creep has no effect on the material's dynamic E-modules.
Material:
Environment:
P V
≤ 17 %≤ 18 %
≤ 2 mm≤ 2.2 mm
Resilience durability:
Total deflection (momentary + long-termcreep) at 106 h (114 years)
DynamicE-module
GRAB-310 Relative thickness For 12-mm thickness Change
≈ 0 %≈ 0 %
Elastomer has extremely long durability. Not affected by ozone, UV radiation or by commonly occurring chemicals.
Functional durability:
Granab Subfloor Systems are designed for easy removal when neces-sary and for subsequent reinstallation as complete units.
Granab Subfloor Systems, materials, environmental impact, durability, specific product properties
Material: Galvanised steel, alternatively, untreated steel, thickness 1.5 mm
Environment: Thin steel plate is a part of the ecosystem and processed into new steel in electro-steel works.
Functional dura-bility:
Galvanised steel has extremely long durability.
20%
15
10
5
2010° 10 1 10 2 10 3
2 N/mm 2
10 4 10 5 10 6
h
(114 years)
Granab subfloor systems
Floor girders
Dampening elements
Support blocks with adjustment screws
Materials: Polypropylene, Granab stand-ard, according to DIN 53444
Environment: No environmental impact. Recyclable into new basic material.
Functional dura-bility:
Very long according to the diagram
12 13
Examples of alternative floor coverings
22-mm chipboard & 15-mm parquet
Follow the instructions for installation and laying from the respective chipboard and parquet manufacturers.
22-mm chipboard & carpet
Gluing/screwing chipboard
NB: Casco Superset no. 3879 or equivalent
22-mm parquet, floating or glued to the girders
Floating Gluing, parquet
NB: Casco Superset no. 3879 or equivalent
NB: Use intermediate strips of flooring paper.
Tiles
WC/Bathroom Entrance/Hall
NB: Use flooring paper as an interlayer between the chip-board and parquet.
Granab systems are installed as subfloor systems for tiled areas in halls and wet rooms in various construction projects.
Granab systems – which consist entirely of non-organic materials – are not sensitive to moisture and at the same time, provide effective impact and airborne sound insulation.
The girders are installed with c/c spacing of 300 mm.
Example, remodelling: Granab subfloor system, c/c 300 mm, with 22-mm chipboard, sheet of non-organic material, moisture barrier, tiles.
A: Chipboard flooring, 22 mm B: Sheet of non-organic material C: Floor levelling compound
C
B
A
Tiled surfaces
Bathrooms
C C BA
General drawing for tiled area
14 15
Testing of Granab subfloor systems with tiled surfaces
Bathroom modules
Granab subfloor systems with tiling have been tested by the SP Technical Research Institute of Sweden with respect to deflection and strength properties.
Complete bathroom modulesPrefab bathrooms are becoming increasingly common in residential construction in Sweden.
They have been widely used by our Scandinavian neighbours for several years.
A Granab system combined with a prefab bathroom, entails a complete solution with many benefits, includ-ing effective sound insulation.
The level difference between the subfloor and module is adjusted with the Granab system.
14 15
HALL
KÖK/V-RUM CA 33 m2(V-RUM CA 23 m2)
BALKONG CA 6,5 m2
SOVRUM 1CA 12,5 m2
HALL
KÖK/V-RUM CA 33 m2(V-RUM CA 23 m2)
BALKONG CA 6,5 m2
HALL
KÖK/V-RUM CA 30 m2(V-RUM CA 20 m2)
BALKO
NG
CA 6,5
m2
KÖK/V-RUM CA 30 m2(V-RUM CA 20 m2)
SOVRUM 2 CA 12,5 m2
SOVRUM 1CA 11 m2
SOVRUM 2CA 8,5 m2
HALL
SOVRUM 3CA 11,5 m2
SOVRUM 1 CA 12,5 m2
SOVRUM 2 CA 9 m2
SOVRUM 1 CA 11,5 m2
KLK CA 3,5 m2
WC/DUSCHCA 5,5 m2
WC CA 1,5 m2
KLK CA 2,5 m2
KLK CA 1,5 m2
WC/DUSCHCA 5,5 m2
WC/DUSCHCA 5,5 m2
FRDCA 2 m2E
E
EE
BALKO
NG
CA 6,5
m2
WC/DUSCHCA 5,5 m2
BOX 172447 24 VARGARDA
Claes-Goran Andreasson
DATUMSIGNÄNDRINGEN AVSERANTBET
HANDLÄGGARERITAD AVUPPDRAG NR
ANSVARIGDATUM
BETNUMMERSKALA
GRANAB AB
KV.UGGLAN
VEIDEKKE SVERIGE
071116GRANAB S-7000
1:50(A1)
PLAN 2-5HUS 1
850
1220
1220
1500
1310
1500
1310
15202600
15202600
15202600
15202600
2030
360
16202600
2450
1620 2600
10802600
10802600
10802600
10802600
108026002000
108026002000
1360260026002600
1360260026002600
300
2520
1470
9603002370
1080
2600
7302600
1240
2090
2530
1460 2600 2600 2600
500
850750
950
500
2210
2210
2210
2210
2210
3002460
3002460
1570
2600
1930510
2600
450
1100
250 2600
320
440
500
850
850
500
2600
2600
2600
2600
2600
2820
2040310
2820
2690
500
850
3002360
3002360
3002360
3002360
3002360
3002360
3002360
1460
2600
8301630
1460
2600
300 2450
850
500
3002360
3002360
3002360
3002360
3002360
3002360
990
2600
5301970
990
2600
300 2450
310
13702600
13702600
13702600
13702600
2450
14602600
2120
1460 2600
11102600500
500
500
1230
11102600
11102600
11102600
11102600
11102600
11102600
11102600
11102600
11102600
1200 2600
340
2600
2600
8202600330
2280
1590
1120
850
950
1550
3002380
15102600
15102600
1410
1470
450
3002480
1700
300 2390
1550
380
1560
850
1430
520
650
1520
830
580
850
3002360
500
3002360
3002360
3002360
3002360
3002360
3002360
1320
2600
3002450
1320
2600
720 1770
850
850
500
2480
2480
2480
2480
2480
2480
1320
2600
2580
1320
2600
530 1880
500
500
500
15202600
760
310
950
2390 380
2600 2600
15202600
15202600
15202600
15202600
2340
1360260026002600
1360260026002600
10702600
10702600
10702600
10702600
10702600
10702600
1540
300
2380
360
2000
16202600
2450
760
6702600
1810
340 2600 2600
640
2600
300 2350 960
850
2340
2340
1070
2430
1070
2430
2160
2600
720
2350
2600
7202250
2250
2250
2250
2250
400
850
2250
3302250
2600
1320
2600
2600
1320
2460 300
2460 300
2460 300
2460 300
2460 300
2460 300
500
2460 300
850
2600950
2260
1600
1580
2010
2600 1460
2450
570
490
2600
2600
340
2600 1090
2600 1090
2600 1090
2600 1090
2600 1090
2600 1090
2600 1090
2600 1090
2600 1090
2600 650
2600 1370
2600 1370
2600 1370
2600 1370
500
500
500 31
0
1740
640
2350
1980
2290 300
380
1550
1810
2250
2600 1500
2600 1500
1460850
1520
950
1530
1320
490
740370
520
1430
850
GR 1:75
Planning, logistics efficiency
Packaged and labelled for each flat
Delivery optimisationGranab systems are packed and delivered with pre-cut and dimension-adapted floor girders and factory-fitted support blocks and dampening elements. Each girder is labelled with a room name and length that matches the information on the installation drawing for each flat or other agreed-upon space subdivision. Granab systems are packaged in bundles on EUR pallets with a maximum length of either 2600 mm or 3800 mm.
16 17
Planning, logistics efficiency
Girders are pre-cut to the correct lengths according to the drawing for each room unit.
Because Granab systems consist of non-organic materials and are not affected by moisture or temperature varia-tions, they can be delivered while the framework is still under construction. Granab girders can be produced with a maximum length of 2600 mm – the same length as for a bundle of plasterboard. The plasterboard for the walls can be moved in along with the wall girders, which are placed on stands above the Granab girder packages.
By lifting the materials into place during framework construction and erecting the interior walls above the Granab system, workflow is more efficient and costs for logistics are minimised.
Interior walls for finished Granab subfloorsWalls for flats or other subdivisions are first erected from floor to ceil-ing. It is advisable to erect interior walls within a flat or subdivision on finished Granab subflooring, including the chipboard.Erection of interior walls in this manner permits the chipboard to be installed quicker and entails less waste in that one is working with larger, continuous floor surfaces. Material consumption for the interior walls is lower and installation of both the Granab floor and interior walls goes significantly faster.
Intra-transport in conjunction with framework construction
6.9 m²
SOV1
40.7 m²
STUE/KJØKKEN
3.9 m²
WC10.3 m²
GANG
3.2 m²
SKAP/BOD
8.6 m²
BAD/OMKL.
8.4 m²
SOV36.6 m²
SOV2
11.8 m²
SOV17.4 m²
BAD/VASK/OMKL.7.8 m²
HALL
2.6 m²
SKAP
39.5 m²
STUE/KJØKKEN
6.6 m²
SOV2
4.5 m²
BOD
28.4 m²
STUE/KJØKKEN
4.7 m²
HALL
6.9 m²
SOV110.4 m²
SOV2
7.5 m²
BAD/VASK/OMKL.
4.1 m²
HALL
13.8 m²
GANG
11.3 m²
TERRASSE
10x21M
10x21M
10x21M
8.4 m²
SOV36.6 m²
SOV2
40.7 m²
STUE/KJØKKEN
6.9 m²
SOV1
8.6 m²
BAD/OMKL.
4.1 m²
HALL
10.3 m²
GANG
3.2 m²
SKAP/BOD
3.9 m²
WC
9.9 m²
TERRASSE
9.5 m²
TERRASSE
37.8 m²
STUE/KJØKKEN
6.6 m²
SOV2
11.8 m²
SOV17.4 m²
BAD/VASK/OMKL.
7.8 m²
HALL
2.6 m²
SKAP
21.1 m²
TRAPPEROM10x21M
10x21M
10x21M
10x21M
10x21M
8x21M
10x21M
10x21M
8x21M
8x21M
10x21M
10x21M
10x21M
8x21M
10x21M
10x21M
10x21M
10x21M
10x21M
10x21M
10x21M
10x21M
28x21M
9x21M 10x21M 9x21M
10x21M10x21M
10x21M
8x21M
28x21M
10x21M
10x21M
10x21M
10x21M
10x21M
8x21M
10x21M
10x21M
0.6 m²
EL-SKAP8
11
46
1
2
2
1
1
2
2
9 10
9
99
9
99
8
1 1
46
1
2
2
1
1
2
2
1
1
1
5
2
2
1111
11 11
11
1
1
1
5
2
2 11
4
1
1
1
1
5
6
2
2
26002600260026001980
2600
2600
10
2600
5302600 380
2500
2180
2310
300 2600 2470
1810
2600680
400
2420
2600 1010
2560
300
2600 2600 2600 2600 1910
2600 2600 2600 2600 1910
2600 2600 2600 2600 1910
2600 2600 2600 2600 1910
2600 2600 2600 2600 1910
2600 2600 2600 940
2600 2600 2600 940
2600 2600 2600 940
2600 2560 1320
2600 2000 2600 2400
2600 1400 2600 2400
2600 800 2600 2400
1170
2600
430
1170
2600
430
1100
1100
1100
1100
1100
950
950
26002600260026001980
2560
300 2600 870
2420
4102600820
1810
2600 2470
2560
2180
2570
2600 380
2600
530
2600
2600
2600 2600 2600 2600 1910
2600 2600 2600 2600 1910
2600 2600 2600 2600 1910
2600 2600 2600 2600 1910
2600 2600 2600 2600 1910
2600 2600 2600 940
2600 2600 2600 940
2600 2600 2600 940
1320 2600 2560
2600 2400 2600 2000
2600 2400 2600 1400
2600 2400 2600 800
2600440
1600
1880
1170
2600
430
1170
2600
430
1100
1100
1100
1100
1100
950
950
26001500
2440
300
2600430
2600
270
2530300
1720
1290
1280
26002600
390
2600 1970
18201680
2600
2600
1580
2540 300
2310
2460 300 2600 1430
2460 300 2600 1430
2460 300 2600 1430
2600 600 2600 1430
2600 950 1230
2600 2600 2140
2600 2600 1960
2600 2600 1960
2600 2600 1960
2600 2600 1960
2600 2600 1960
2600 2600 1960
2600 2600 1950
2600 2600 1950
2600 2600 1950
2120
920
2400
2600420
950
26001430
26002600410
400
1190
2600
2600
870
2600 2600 2600 1810
2600
1010
2460300
2600
400
2600 2600 340
2600 2600 1480
2600 2600 1480
2600 2600 1480
2600 2600 1480
2600 2600 2600 1740
2600 2600 2600 1740
2600 2600 2600 1740
2600 2600 2600 1740
2600 2600 2600 1740
2600 2600 2600 1740
26002600270
2530300
2510
300
2600430
2500
30026001500
2310
2400 300
2600
2600
1720
2600 2600 2020
2600
2600
390
1280
1220
1790
2600 1430 2460 300
2600 1430 2460 300
2600 1430 2460 300
2600 1430 2600 600
1230 2600 950
2600 2600 2140
2600 2600 1960
2600 2600 1960
2600 2600 1960
2600 2600 1960
2600 2600 1960
2600 2600 1960
2600 2600 1950
2600 2600 1950
2600 2600 1950
2330
2600350
26001410
950
2600880
2260
320 2600 690
2500
2600 820
2600 820
2600 820
2600 820
2600 820
2600 820
2600 820
2600 820
1550
1900
2600410
2600880
2520
2600 680 320
2270
2600 800
2600 820
2600 820
2600 820
2600 820
2600 820
2600 820
2600 820
1800
2440
660 410
1200
1880
560
560
1680
1680
1680
1680
1680
1680
2520300
2380
300 2520 300
2380
300
2410 300
2410 300
2410 300
2410 300
2410 300
2410 300
2410 300
2420 300
2420 300
2410300
2330
300 2410 300
2330
300
2600
2600
2600
2600
2600
2600
2600
2600
2600
2520300
2380
300 2520 300
2380
2410 300
2410 300
2410 300
2410 300
2410 300
2410 300
2410 300
2410 300
2410 300
300
1970
1890
1280
520
660
2440
1870
1870
1870
1870
1870
1870
560
560
BOX 172447 24 VARGARDA
Claes-Goran Andreasson
DATUMSIGNÄNDRINGEN AVSERANTBET
HANDLÄGGARERITAD AVUPPDRAG NR
ANSVARIGDATUM
BETNUMMERSKALA
GRANAB ABTERRASSE
TERRASSE
GVJ
KV.RONNVIKVEIEN
PLAN 1-4
GR 1:731:50(A1)
080214GRANAB S-7000
HUS C
16 17
Deflection during application of point loads on floors laid on a Granab system is dependent on – besides the subfloor construction and c/c distance between the girders – the choice of floor covering and how installa-tion is performed.The respective flooring manufacturers provide informa-tion about deflection for each type of floor covering.Deflection of the finished floor construction with a point load of 1 kN should not exceed 2 – 3 mm accord-ing to the SP Technical Research Institute of Sweden.
Deflection properties
Testing and certification are conducted by the SP Tech-nical Research Institute of Sweden. Contact Granab about full type-approval no. 192101.Granab systems with 22-mm chipboard and both 15-mm or 22-mm parquet have been tested in a number of residential projects by the SP Technical Research Institute of Sweden with respect to deflection of the completed floors. The results show an average deflec-tion within 2 mm of other measurement points in each flat with a point load of 1 kN.Documentation from measurements conducted by the SP Technical Research Institute of Sweden with alternative floor coverings from a large number of field measurements in completed residential projects can be provided by Granab upon request, as well as figures from lab measure-ments conducted by the SP Technical Research Institute of Sweden and measure-ments from a large number of assembled test floors in Granab's testing facility with alternative floor coverings.All measurement results are within the margins for recommended values.
Pleasant, comfort-adapted floors with Granab systems for a better working and living environmentIn a good living and working environment, it is important that floors are not hard or entirely rigid, which
can lead to pain in the shoulders, back and legs. Granab systems, with their integrated impact-dampen-
ing effect, provide comfortable floors with documented degree of deflection for point loads.
Example from test measurements of deflection when a point load is applied
Lab tests of deflection for various point loads
18 19
9
5
6
7
8
4
3
2
1
00 0,5 1,5 2,5 3,5 4,52
Deformation (mm)
Kra
ft (
kN
)
3 41
Granab systems provide pleasant
and comfort-adapted floors for
improved living and working
environments.
Floor constructions with par-quet or other floor coverings on girders entail less elastic deflection in the floor layer when point loads are applied.In certain cases, residents who are accustomed to entirely rigid flooring on concrete subfloors may have questions about the floor construction and the new floors.
Granab can provide separate information sheets for answering these questions.
Non-deformableBecause Granab systems are non-deformable and constructed entirely of non-organic materials, there will be no problems with sagging or creaking that can occur in conjunction with drying or creep of floor joists made of wood, for example, or
other organic materials.
Floor coveringsThe choice of floor covering is an important factor for the final comfort of a completed floor. Point-load deflection for Granab systems is in compliance with the applicable standards and recommendations. For the entire finished floor construction (including the floor covering) to attain the expected comfort – besides the choice of floor covering laid over the Granab sys-tem – it is important that the both the Granab system and floor covering are installed by trained installers and floor-layers, and that the installation instructions and checklists are carefully followed.
Testing methodology for deflection of completed floorsThe SP Technical Research Institute of Sweden has developed a measurement method and device with digital deformation sensors for reliably and easily measuring deflection of com-pleted floors. Please contact Granab for information about the measurement device and instructions for use.
Testing methodology for deflection of completed floors
Information to residents
18 19
Impact and airborne sound insulationImpact and airborne sound insulation in homes and offices Granab systems provide effective impact and airborne sound insulation. Effective insulation against sound from surrounding spaces is important for a good living and working environment. Investigations show that in older structures, residents are often disturbed by impact sounds, loud music, slamming doors and staircase traffic, as well as noise from running water, lifts, ventilation and traffic. A good sound environment has become a prioritised requirement when building new homes, and there are also more stringent requirements for quieter working environments in offices and schools.
Sound classification standards stipulate acoustic requirements for homes and other premisesThe Swedish Board of Building, Planning and Housing (BBR) has established a generally formulated requirement for acoustic environments, calling for buildings being designed so that residents and other occupants are effectively protected against noise. In a general recommendation, BBR mentions sound class C in the SIS standards SS 25267 (dwellings) and SS 25268 (other premises), where detailed requirements and verification methods are described. The recommendation also states that “if better sound conditions are preferred, sound class A or B can be selected.” In practice, dwellings are usually planned for sound class B to fulfil customers' wishes. The standards place special requirements on sound insulation for low frequencies, due to these frequencies having been found to be especially important for the subjectively perceived sound environment. Appendix B in SS 25267 provides guidance on how floor constructions can be chosen so that impact sound requirements are fulfilled, and how one can calculate which sound class will be achieved with a certain combination of subflooring and floor construction. In buildings with Granab's sound-dampening subfloor systems, significantly improved sound insulation of sub-flooring is achieved (even at low frequencies) in comparison with conventional, thin floor coverings. Installations run freely under a Granab floor do not produce structure-borne sound because they are not attached to the framework.
Documentation of Granab systems' sound-insulating properties Granab systems have been developed in close collaboration with researchers and acoustic consultants in the building industry to satisfy highly placed demands on impact and airborne sound insulation in homes, offices and schools. Granab systems func-tion as supplementary insulation for building frameworks both in new construction and remodelling projects. The impact and sound insulating function of the systems has been carefully documented in accordance with the requirements of SS 25267 through, for example, lab measurements and a large number of field measurements in completed buildings. In this way, values for sound dampening could be established, permitting sound insulation in buildings to be verified with calculations as specified in SS 25267. Calculation of sound insulation in completed buildings shall be conducted according to the Swedish and European standard SS-EN 12354, Parts 1 and 2 with input data from Granab. Input data for concrete subfloors is in the BASTIAN database, as well as at www.byggamedprefaf.se and www.betongbanken.com. For lightweight subfloors, such as wooden subfloors, contact Granab.
A number of examples of acoustic measurements in the SP Technical Research Institute of Sweden's impact-sound lab, as well as vertically between flats with Granab subfloor systems installed on hollow-core slabs HD/F 120/19 and HD/F 120/27 in build-ings, are presented on pages 22–27.
SS 25267 Applicable sound class limits for dwellings
Sound class according to SS 25267
Highest permitted impact sound lev-el* L´n,w+ CI,50-2500
Lowest permit-ted airborne sound level* R´w+ C50-3150
A 48 dB 61 dB
B 52 dB 57 dB
C 56 dB 53 dB
Examples of measurement results
Impact sound L´n,w+ Ci,50-2500
Airborne sound R´w + C50-3150
Remarks
Accredited sound measurements in completed building with a Granab system on hollow-core slabs HD/F 185 mm
and HD/F 270 mm
Granab system, height 65 mm incl. floor covering laid on HD/F 270 mm
Granab system, height 70 mm incl. floor covering laid on HD/F 185 mm
Granab system, height 150 mm incl. floor covering laid on HD/F 185 mm Granab system, height 165 mm incl. floor covering laid on HD/F 270 mm
System 3000Also see measure-ment results for alternative con-figurations of Granab systems on pages 24 – 26.
System 7000page 27
51 dB
51 dB
46 dB
47 dB
50 dB
65 dB
58 dB
61 dB
59 dB
• The impact sound value shall be as low as possible.
• The airborne sound value shall be as high as possible.
20 21
* Verification with calculations. When performing verification measurements, the requirement shall be fulfilled in average values, although deviations of no more than 2 dB are permitted in isolated cases as long as the average value is attained.
Presented field measurements with alternative configurations of Granab systems show impact and airborne sound values that comply with sound class B and in certain configurations, sound class A.
ConditionsGranab subfloor systems, including floor coverings, can be configured for various sound classes (A – C according to BBR and SS 25267/SS 25268).
For a planned sound class between rooms in buildings with Granab subfloor systems to be attained both vertically and horizon-tally, it is important:• That the floor and wall constructions provide the correct conditions for attaining the correct sound class, which can be veri-
fied by calculating the sound insulation in unfinished floors and walls according to SS-EN 12354 or by measuring the sound insulation during the production phase according to the methods in SS 25267. Measurements are made before the under-floor system is installed with temporary actions taken during measurement to prevent airborne sound leakage between measurement spaces.
• That Granab subfloor systems are installed by trained installers and and in accord-ance with Granab's installation instructions and installation checklists.
• That Granab systems and the floor coverings can move freely and do not have rigid contact points against the building framework, for example, at attachments and lead-throughs.
• That sound leakage through joints and installations in floors and walls is prevented.• That flank transmission via attached constructions – exterior walls, subceilings, etc. –
is prevented.• That sound transmission via ventilation ducts between flats does not occur.• For more information, see Granab's general delivery and sales terms.
Granab subfloor systems are constructed with non-deformable steel girders and an effective resilient suspension system. The subfloor systems are secured to stable subfloors with screws and set at the desired height. Floor coverings of the parquet or chip-board of your choice can be glued, screwed or laid floating. Hollow-core elements and solid subfloors do not require the application of levelling compounds when they are complemented with a Granab subfloor system, which means shorter construction times, reduced building humidity and increased flexibility.
To ensure that planned sound classes are attained both vertically (between floors) and horizontally (on the same floor) in com-pleted buildings, all components of the building construction must function in the correct manner. An acoustic consultant should be engaged to review planned building constructions (construction documents). During the construction phase, installation should be checked according to our checklists.
Definition, airborne sound insulation:The separating construc-tion's capability to reduce sounds that reach the construction via the air.
Definition, impact sound level:The sound pressure level in a demarcated space from a standardised impact sound device that hammers on a floor.
Sound class description, dwellings, according to SS 25267
Sound class A: The sound class corresponds to very good acoustic conditions.
Sound class B: The sound class corresponds to significantly better acoustic conditions than sound class C. This sound class should be applied when a good living environment is requested.
Sound class C: The sound class provides satisfactory acoustic conditions for a majority of residents and can be applied as a minimum requirement according to the Swedish Board of Building, Planning and Housing's directives.
Remarks: The function requirements in this standard are adapted to the respective sound classes on the basis of extensive practical experience of subjectively perceived acoustic environments in dwellings. It should be noted, however, that building constructions – for both practical and financial reasons – cannot be designed to entirely avoid audible sound from adjoining spaces from all types of activities. Audible sound can occur, for example, from jumping or substantial impact on a floor. even occur in buildings that fulfil the higher sound classes
Percussive sound: Percussive sound is addressed in SS 25268 (version 2 2007) and referred to there as ”impact sound in same room”. The requirement stipulates that percussive sound shall be limited in spaces in which several persons are present more than temporarily, such as in large office spaces, nursery schools, etc. Guidelines for measurement and assessment of percussive sound are included in the SIS technical report 2007:15 (www.sis.se). The degree of percussive sound is dependent on the floor covering used. Contact Granab for more information prior to planning.
20 21
Granab subfloor systems have been tested by the SP Technical Re-search Institute of Sweden on a reference subfloor of 16-cm concrete according to the Swedish and international standard SS-EN ISO 140. The impact sound tests were conducted with15-mm parquet flooring on flooring paper, Granab's subflooring of 22-mm chipboard flooring that was glued and screwed to the 7000 system's steel sections, green Sylodyn® dampening pads and spacer screws in the concrete subfloor. The dampening pads are built in under the steel sections and permit movements in the floor without impact sound being transmitted via the screws to the concrete subfloor.
By comparing measured impact sound levels for completed floors with the levels attained for the lab's concrete subfloor alone, the SP Techni-cal Research Institute of Sweden can present improvement values for the Granab system ( ) that were calculated in the one-third octave band according to ISO 140-8.
The improvement values from the lab can be used for calculating impact sound levels in buildings with other types of concrete subfloors in ac-cordance with SS-EN 12354-2. Values for Granab systems and various concrete subfloors are in the database for the calculation programme BASTIAN. When calculating impact and airborne sound insulation in subfloors between rooms, the programme takes consideration to the effects of areas and room volumes, as well as adjoining structural ele-ments, which enables both simple and cost-effective engineering of a building's sound insulation. The calculation results have been compared with a large number of values from field measurements and have been shown to agree well in regard to average values. Granab recommends maintaining a 1-dB margin when engineering against acoustic require-ments in completed buildings in accordance with SS 25267/-68.
Impact sound reduction in the lab
System 3000
System 7000
22 23
Guidance in the choice of floor coverings and upper flooring on thin concrete subfloors according to SS 25267 Appendix B, (<180 mm)
In Appendix B of SS 25267, classification is conducted of floor coverings' impact sound dampening on thin concrete subfloors. The classification is made in seven different floor covering classes with descriptions of impact sound dampening for the respective floor covering classes. The highest floor covering class is class 8A, which the Granab systems fulfil by a wide margin. Wooden floors and carpet on a thin elastic mat normally fulfil impact sound class 7, which results in sound class C on the same floor.Floor covering class Criterion dB Significance/Application. Floor coverings that belong to the group8A 25-28 can fulfil sound class A between dwellings when they are laid on concrete subfloors.For a full description, please refer to the standard SS 25267 (SIS proposal), www.sis.se
To facilitate comparisons of various floor solutions for dampening impact sound, there is a classification system in Appendix B of the Swedish standard for sound classification of dwellings (SS 25267). The impact sound classification is based on the weighed summation value w that the SP Technical Research Institute of Sweden calculates form 16 values in the one-third octave band (100 – 3150 Hz) according to SS-EN ISO 717-2. Buildings with concrete floors and coverings in impact class 7 normally fulfil BBR's requirements (sound class C). Granab systems produce 29 dB, which fulfils the highest impact sound class 8A. Floors in this class normally fulfil impact sound requirements for sound class A in buildings with concrete floors.
Impact sound reduction in the lab
with
Granab subfloor systems
29dB
22 23
Rw+c = 58 dBRw(8) = 59 dB
Rw+c = 65 dBRw(8) = 67 dB
ReduktionstalRdB100
90
80
70
60
50
40
30
20
10
0*2
63
50 100 200 400 800 1600 3150 630080 160 315 630 1250 2500 5000 10000
125 250 500 1000 2000 4000 8000
0-mätning.Referenskurva
System 300 B1-A1 VertikaltB1-A1 Vertikalt
0
StegljudsnivåL10 dB100
90
80
70
60
50
40
30
20
10
0*2*2
63
50 100 200 400 800 1600 3150 630080 160 315 630 1250 2500 5000 10000
125 250 500 1000 2000 4000 8000
0-mätning.Referenskurva
System 300 B1-A1 VertikaltB1-A1 Vertikalt Ln,w+c = 84 dB
Ln,w(8) = 84 dBLn,w(8) = 46 dBLn,w+c = 46 dB
0
Impact and airborne sound reduction, vertical, System 3000
ConfigurationGranab subfloor system installed on HD/F 270 mm and 22-mm chipboard & carpet
Measurement resultsImpact sound: Lnw+c 46 dB Airborne sound: Rw+c 65 dB
ConfigurationGranab subfloor system installed on HD/F 270 mm and 22-mm chipboard & 15-mm parquet
Measurement resultsImpact sound: Lnw+c 43 dB Airborne sound: Rw+c 65 dB
System 3000, airborne sound System 3000, impact sound
Sound insulation measurements
Granab subfloor system installed on HD/F 270 mm. Accredited sound insulation measurements according to: SS 02 52 54 - SS-ISO 717/1 and SS-ISO 717/2 conducted by Ingemansson Technology AB.
65
270
65
270
24 25
Rw+c = 55 dB
ReduktionstalRdB
90
80
70
60
50
40
30
20
10
0
63
50 100 200 400 800 1600 315080 160 315 630 1250 2500
125 250 500 1000 2000
0-mätning.Referenskurva
System 300 Vertikalt Rw = 62 dB
Vertikalt Rw = 57 dB
Rw+c = 58 dB0
StegljudsnivåL10 dB
90
80
70
60
50
40
30
20
10
0
63
50 100 200 400 800 1600 315080 160 315 630 1250 2500
125 250 500 1000 2000
Ln,w+c = 67 dB0-mätning.Referenskurva
System300 Vertikalt Ln,w= 49 dB
Vertikalt Ln,w= 80 dB
Ln,w+c = 51 dB0
Impact and airborne sound reduction, vertical, System 3000
ConfigurationGranab subfloor system installed on HD/F 185 mm and 22-mm chipboard & carpet
Measurement resultsImpact sound: Lnw+c 51 dB Airborne sound: Rw+c 58 dB
ConfigurationGranab subfloor system installed on HD/F 185 mm and 22-mm chipboard & 15-mm parquet
Measurement resultsImpact sound: Lnw+c 48 dB Airborne sound: Rw+c 59 dB
System 3000, airborne sound System 3000, impact sound
Sound insulation measurements
Granab subfloor system installed on HD/F 185 mm Accredited sound insulation measurements according to SS-EN ISO 140-4-7 conducted by KM Akustikbyrån.
70
70
185
185
24 25
6461
Impact and airborne sound reduction, vertical, System 3000
ConfigurationGranab subfloor system installed on HD/F 185 mm with 22-mm chipboard above.
Measurement resultsImpact sound: Lnw+c 47 dB Airborne sound: Rw+c 61 dB
ConfigurationGranab subfloor system installed on HD/F 185 mm and 22-mm chipboard, and 15-mm parquet above.
Measurement resultsImpact sound: Lnw+c 46 dB Airborne sound: Rw+c 63 dB
System 3000, airborne sound System 3000, impact sound
Sound insulation measurements
Granab subfloor system installed on HD/F 185 mm Accredited sound insulation measurements according to SS-EN ISO 717/1, 717/2 conducted by J&W Akustikbyrån.
150
185
150
185
26 27
ReduktionstalR'
90
80
70
60
50
40
30
20
10
0
63
50 100 200 400 800 1600 315080 160 315 630 1250 2500
125 250 500 1000 2000 4000
System 7000 Vertikalt Rw = 62 dBRw+c = 59 dB
StegljudsnivåL'
90
80
70
60
50
40
30
20
10
0
63
50 100 200 400 800 1600 315080 160 315 630 1250 2500
125 250 500 1000 2000 4000
System 7000 Vertikalt Ln,w= 47 dBLn,w+c = 50 dB
Impact and airborne sound reduction, vertical, System 7000
ConfigurationGranab subfloor system installed on HD/F 270 mm and 22-mm chipboard & carpet
Measurement resultsImpact sound: Lnw+c 50 dB Airborne sound: Rw+c 59 dB
ConfigurationGranab subfloor system installed on HD/F 270 mm and 22-mm chipboard, and 15-mm parquet above.
Measurement resultsImpact sound: Lnw+c 48 dB Airborne sound: Rw+c 61 dB
System 7000, airborne sound System 7000, impact sound
Sound insulation measurements
Granab subfloor system installed on HD/F 270 mm Accredited sound insulation measurements according to SS-EN ISO 140-4-7 conducted by KM Akustikbyrån.
150
270
150
270
26 27
Offices – Public buildingsImpact 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 acous-tic 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 environmentIn 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 com-fortable 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 68Lowest total airborne sound insulation between spaces Rw (dB)
Type of space Sound class B Sound class C
Office room 35 35 – along corridor 30 30Interview/conference room 441) 44 – along corridor 352) 351) 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 68Highest impact sound level between different spaces, L´nw (dB)
Type of space Sound class B Sound class C
Office room, interview roomConference room, break room. – along corridor 64 68from other space 60 68
28 29
Configuration
Granab Subfloor System 7000 incl. 22-mm chipboard & 15-mm parquet. Light weight wall erected continuously on Granab sys-tem incl. surface layer.
Measurement resultsImpact sound: Lnw 59 dB Airborne sound: Rw 56 dB
Offices – Public buildings
Example – PlanningElectrical, datacom, telecom – Offices
System description – ElectricalGranab 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 unitsThe 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 routesThe 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 con-duits to the equipment locations (outlets).
The system can be potential equalised.
KM ELTEKNIK AB Rullagergatan 6, 415 26 Gˆteborg ∑ Tel: 031-727 25 00 ∑ Fax: 031-727 25 01 www.km.se
KONTOR
Uppdragsnummer 203939 Datum
2000-02-15 Rev. datum Uppr‰ttad av Jorkby, Ingemar Granskad av
Godk‰nd av
GRANAB GOLVREGELSYSTEM SYSTEMBESKRIVNING - EL
GRANAB AB
Remodelling into offices, library and other public premises
Granab subfloor system installed in the Kv. Stallet project, Stockholm
28 29
Granab ventilated subfloors
Granab can provide ventilation planning that even encompasses function, operation and maintenance instructions. Installation of ventilation is conducted by a local HVAC installer or building contractor.
If there is uncertainty and risk concerning humidity content or emissions form the bottom slab or subfloor construction, air gaps under the finished floor should be ventilated using mechani-cal ventilation in combination with the fitting of a moisture barrier under the floor girders.
In its standard configuration, the height of the Granab system is adjustable from 30–420 mm and provides an open airflow under the girders.
The space under the floor constitutes a separate “room unit” (sealed box) that is ventilated independently, or in special cases, in combination with other ventilation.
System 3000 with moisture barrier above the girders
System 7000 with moisture barrier above the girders
Order our ventilation pamphletfor more information.
30 31
Granab ventilated subfloors
A large number of single-family dwellings and other buildings are subjected to moisture damage each year in basements, or elevated moisture content in basement slabs.
Besides performing checks and taking possible measures involving new drainage and filling materials around the structure, the wooden joists or plastic floor covering in-stalled or placed directly on the basement floor must be removed, followed by drying of the concrete floor.
Do not build in moisture!Moisture from concrete floors in basements or bottom slabs must be removed through ventilation and not built into the floor construction. A Granab system with floor girders of galvanised steel and no organic materials is adjusted up from the concrete floor to the desired height and air in the space between the subfloor and surface flooring is constantly extracted using ventilation.Granab systems with sound-dampening elements pro-vide comfortable floors with good acoustic properties.
Granab ventilated subfloor principle
Separate mechanical ventilation in “room unit” under the floor using an exhaust fan that draws air out via perforated air ducts of, for example, standard spiral ducting.
Inlet air to the ducts is obtained via a filter-equipped air terminal device that takes inlet air from the respective room units.Additional inlet air can be obtained with, for example, an additional outdoor air valve.
Avoid moisture, mould and stale indoor air – install a Granab system with underfloor ventilation.
30 31
32 33
Floor heating installed in Granab systems
Floor heating is installed in Granab systems in increasing num-bers of residential projects.
Granab systems with steel floor girders is entirely non-de-formable and not affected by temperature variations, which is a major advantage in avoiding subsequent floor construction problems.
Installation of most available floor heating systems with Granab Subfloor Systems 3000 and 7000 provides significant benefits.
Floor heating in 22-mm chipboard flooring with grooves
Floor heating in sealed floor heating units
Grooved 22-mm chipboard flooring that is glued and screwed in place on the Granab girders.Floor heating plates are fitted in the grooves to distribute the heat from the tubes to the floor. The floor heating tubes are then pressed into the heat distribution plates.
Floor covering15-mm parquet is laid directly on the floor heating installation, possibly with an underlying mois-ture barrier.It is important that installation instructions from the flooring manufacturers are carefully followed.
Heating coils are installed in the floor heating units. The sealed unit/floor plate is fitted parallel to the subfloor system's girders and on the sealed unit brackets, which are mounted between the girders (System 7000). Standard spacing between joints, c/c 600.
Floor covering
22-mm chipboard flooring & carpet or 15-mm parquet, alternatively, floor mortar & tiles
When choosing waterborne floor heating, two alternative primary systems are installed in Granab Subfloor Systems 3000 and 7000:
For detailed informa-tion, order our floor heating pamphlet.
32 33
Floor heating installed in Granab systems
Recessed convectors
Examples of projects with floor heating/recessed convectors
On many residential projects, solutions with recessed convectors are preferred; for example, when there are glazed floor-to-ceiling facades and downdraughts are to be avoided, but an attractive solution is also desired without visible radiators. In these cases, installation of a Granab subfloor system is very beneficial in that the space between the sub-floor and finished floor can be utilised.
Project: Kv. Klabben, 6000 m2, Stockholm
Client: Folkhem AB
Project: Sickla Udde, 5000 m2, Stockholm
Client: NCC AB / Familjebostäder
34 35
Granab systems with floor additions
Granab systems on wooden subfloors
Granab subfloor systems have been installed in a large number of projects where low weight, in combination with effective impact and airborne sound reduction, is prioritised.
Granab systems entail:Low weight/m2. Approximately 5 kg/m2 in comparison to correspond-ing 10-cm conventional topping solutions: approximately 240 kg/m2.
Project: Gånglåten, 6000 m2, GöteborgClient: PEAB AB / Bostads AB Poseidon, Göteborg
Granab subfloor systems can naturally also be installed on wooden subfloors. For attach-ment, wood screws are used instead of concrete anchors. Contact Granab for more infor-mation.
Granab systems in attic conversions for flats
Project: Attic conversion, 500 m2, Stockholm
34 35
Installation tools, Granab Subfloor Systems 3000 and 7000
Accessories Girder spacers
Mandrel for recess-ing in predrilled holes
Mandrel for final fixation
Screwing tool for adjusting floor girder heightsFor screwdriversShort model: Cat. no. 8100 Long model: Cat. no. 8200
Screwing tool for manually adjusting floor girder heightsShort model: Cat. no. 8300 Long model: Cat. no. 8400
Mandrel for installation of con-crete anchors (1 of each included)Cat. no. 850 A Length 250 mm Cat. no. 850 B Length 500 mm Cat. no. 850 C Length 1000 mm
Drill bit for recessing adjustment screws in girdersCat. no. 8600
Concrete drill bit for concrete anchors.Cat. no. 8700, 250 mm, shortCat. no. 8800, 460 mm, long
Installation pipe for concrete anchorsCat. no. 8900
Cat. no. Tool9300 Girder spacing 300 mm9400 Girder spacing 400 mm9500 Girder spacing 500 mm9600 Girder spacing 600 mm
För isolerings-tjocklek A
70
20
Automatic screwdriver Chipboard flooring screws Insulation bracket, system 7000
Automatic screwdriver type HILTI, 4000 rpm unit. For chip-board flooring screws. Contact Granab.
Self-tapping screws for chip-board. Contact Granab.
Insulation thickness, A mm: 40, 80, 120 or as agreed.Cat. nos. 7040, 7080, 7120
For detailed information, order our installation instructions and DVD.
36 37
Material specifications,Granab Subfloor System 7000
Support block with damp-ening element, adjustment screw and concrete anchor. Cat. no. 3001
Floor girder sectionCat. no. 3010
Support block with damp-ening element, adjustment screw and concrete anchor. Cat. no. 7001
Floor girder sectionCat. no. 7010.
Adjustment screws are availa-ble in standard lengths: 40, 65, 125, 150, 250 and 400 mmSpecial lengths can be pro-vided.
Granab subfloor system installed in project at University of Örebro
Material specifications, Granab Subfloor System 3000
36 37
Installation example
High height
Door openings
Plastic film
As standard, the level of Granab Subfloor System 7000 can be adjusted up to 420 mm. If heights are pre-ferred up to approximately 1000 mm, masonite beams are fitted to the Granab girders. Masonite beams are available in various heights and lengths. Masonite beams are attached to Granab girders with self-tapping screws. NB: Mounting screws may not come in contact with adjustment screws/blocks.
NB: The plastic film is installed above the girders – not directly on the con-crete subfloor.Installation, floating parquet.Granab systems, including girders, are entirely non-organic and not affected by moist environments. By placing the plastic film over the girders, effective, long-lasting moisture protection is obtained against the floor layer above.
Installation, floating 22-mm chip-boardGranab systems, including girders, are entirely non-organic and not affected by moist environments. By placing the plastic film over the girders, an effective moisture pro-tection is obtained against the floor layer above.
System 3000A board is placed on the girder flang-es as a foundation for subsequent installation of a door threshold or cover moulding (NB: Not chipboard).
System 7000The girder is installed at the centre of the door opening so that the board has the same height difference as other girders. The board shall be screwed and glued to the girder in the door opening. The board is used for subsequent installation of a threshold or cover moulding.
For detailed information, order our installation instructions and DVD.
System 3000
System 7000
38
Examples of installations
Project: Gåshaga, 48,000 m2, Lidingö
Client: Skanska AB
Project: Sjölyststranda, 9,000 m2, Oslo
Client: Veidekke ASA
Project: Sickla Udde, 45000 m2, Stockholm
Client: Skanska AB
Project: Lillåudden, 12,000 m2, Västerås
Client: PEAB AB/Mimer AB
Project: Hamar Bryggeri, 12,000 m2, Hamar
Client: Backe-Gruppen AS
Project: Kv. Mältplåten, 6,000 m2, Stockholm
Client: Skanska AB
Project: Sentrumgården, Bodö 14,000 m2
Client: Barlindhaug AS/Skanska AS
38 39
Examples of installations
Project: Sickla Udde, 45000 m2, Stockholm
Client: Skanska AB
Project: Kv. Hjässan, 9,000 m2, Halmstad
Client: NCC AB/Anjo Bygg AB
Project: Kv. Amnetisten, 9,000 m2, Solna
Client: Skanska AB
Project: Sannegårdshamnen, 13,500 m2, Göteborg
Client: JM AB
Project: Kv. Tastagate, 3,000 m2, Stavanger
Client: Skanska AS
Project: Hotell Haga, 4,500 m2, Stockholm
Client: PEAB AB
Project: Norconsult, 3,100 m2, Sandvika
Client: AF Skandinavia AS
Project: Kv. Kajkanten, 7,200 m2, Göteborg
Client: JM AB
See Granab's reference list for more projects.
Bygg- och Miljöteknik Granab ABPhone: +46 (0) 322-66 76 50 Fax: +46 (0) 322-66 76 55
E-mail: [email protected] www.granab.se
Mailing address: P.O.Box 172 SE-447 24 Vårgårda Sweden
Street address: Verkstadsgatan 4 Vårgårda, Sweden
Vers
ion
7. O
ctob
er 2
008
Lay
out:
blom
ill.s
e
Pri
ntin
g: R
ydin
s Tr
ycke
ri A
B
Recommended