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Granab Subfloor Systems 3000 and 7000 have been tested and certified by the SP Technical Research Institute of Sweden. GRANAB SUBFLOOR SYSTEMS INSTALLATION INSTRUCTIONS
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Granab Monteringsanvisning
Transcript of Granabmontering_eng
Granab Subfloor Systems 3000 and 7000 have been tested and certified by the SP Technical Research Institute of Sweden.
GRANAB SUBFLOOR SYSTEMS
INSTALLATION INSTRUCTIONS
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 various 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
Granab Subfloor System 3000 4
Granab Subfloor System 7000 5
Planning instructions 6
Alternative floor coverings 7
Planning 8 - 9
This is what you need 10 - 11
Installation, step by step 12 - 20
Ventilated subfloors 20
Tiled surfaces, bathrooms 21
Checklist 1 – 2 22 – 23
CONTENTS:
2 3 2 3
Design
Design
Installation tools, girder spacers, height adjustment, trimming girders, ergonomic tools
For various load conditions
Drawings, delivery optimisation and installationdrawings
Installer's inspection of Granab Subfloor Systems 3000/7000
Moisture, mould, radon
Chipboard & carpet, chipboard & parquet,floating parquet
Support blocks and dampening elements 12
Laying out girders 13
Height adjustment, frame girders 13
Attachment of frame girders 14
Height adjustment and attachment of other girders 14
Trimming and adjustment of adjustment screws 15
Recessing adjustment screws 15
Adjustment of adjustment screws 16
Recessing adjustment screws 17
Door openings, thresholds, cover mouldings 18
Installation for high levels, 250 – 420 mm 19
Installation of masonite beams, 420 – 1000 mm 19 Installation of skirting 19
Installation of plastic film on Granab girders in moist environments 20
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 6.
for adjustable heights 30-180 mm, excl. floor covering
Section with support block and dampening element, level adjustment screw and con-crete anchor
22-mm parquet, alternatively 22-mm chipboard & 15-mm parquet or carpet
26,5
4517 17
79
Max. height180 mm
MIn. height30 mm
4 5
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 coveringSpecial heights up to 1000 mm with masonite beams on girders (see page 19)
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 19)
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 6.
Section with support block and dampening element, level adjustment screw and con-crete anchor
Adjustment heights
70-420 mm 45
40
6 7
Planning instructions 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 distance 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.
6 7
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
NB: Use flooring paper as an interlayer between the chip-board and parquet.
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
8 9
Packaged and labelled for each flat
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
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.
8 9
Girders are pre-cut to the correct lengths according to the drawing for each room unit.
Planning, logistics efficiency
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
10 11
Accessories Girder spacers
Installation tools, Granab Subfloor Systems 3000 and 7000
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 bits 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 anchor, system 7000
Automatic screwdriver type HILTI, 4000 rpm unit. For chipboard 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
10 11
Insulation bracket System 7000
Ergonomics during installation
Level adjustment with laser levelling
Trimming girderswith compass saw
Insulation bracket System 3000
Screwing tool, longCat. no. 8200
Mandrel, long Cat. no. 850C
Installation pipe for concrete anchors Cat. no. 8900
System 3000 with built-in insulation bracket in the section for 25-mm insulation
All installation tasks can be carried out in comfortable working positions using the long screwing tool model, long mandrel model and installation pipe for concrete anchors. (Contact Granab.)
Insulation thickness, A mm: 40, 80, 120 or as agreed.Cat. nos. 7040, 7080, 7120
12 13
Installation, step by stepGranab Subfloor Systems
Important general joints: NB: Always ensure that the flooring manufacturer's requirements are fulfilled regarding expansion joints, gaps against walls, etc.
Both prior to installation and after installation, all surfaces must be carefully cleaned. All adjustment screws must be carefully secured in the sub-floor with concrete anchors. If all adjustment screws are not properly secured, there is risk for creaking and unevenness in the floor covering after installation.
Adjustment screws must always be recessed into the floor girders so that the upper edges of the adjuster screws do not come in contact with the floor covering, which would cause “bridging” in the sound insulation.When installing chipboard or chipboard/parquet on the girders, it is very important that the chipboard or parquet is not in contact with walls. There must always be a gap of about 5 mm between the walls and chipboard/parquet so that the floor is able to move freely. This is necessary to ensure that the planned sound insulation is attained.
Furthermore, relative humidity in the room is very important to take into consideration when using wood-based flooring, both during and after laying. The manufacturer's instructions must be carefully followed.
Sections with support blocks and dampening elements, level adjustment screws and concrete anchors
System 3000 System 7000
1. Support block and dampening element
If blocks and dampening elements are not ordered factory-installed in the girders, these shall be fitted in the girders according to the general drawings on page 4, alternatively, page 5.
Carefully follow the points on the installer's checklist on pages 22–23.
12 13
2. Laying out girders 3. Height adjustment, frame girders
The girders are laid out according to the general drawing on page 4, alternatively page 5, depending on the choice of system – 3000 or 7000 (residential).
For offices, schools and assembly rooms, see c/c dis-tance, girders, on page 6.
When using installation instructions prepared by Granab for specific projects, follow the specifications for girder locations on the layout drawing.
To facilitate installation and obtain the correct c/c spacing between the girders, use a Granab girder spacer.
Girder spacers are available in the following lengths: 300, 400, 500 and 600 mm. See page 10.
Height adjustment, first frame girders, using a laser. The height is adjusted to 10 mm lower than the final girder height. Begin with the adjustment screws that are to be fitted at each end and at the middle of the girder. The girders are adjusted upwards with the screwing tool in an electric drill. See page 10.
14 15
4. Attachment of frame girders 5. Other girders
Begin by attaching the frame girders. Drill through the adjustment screw down into the base about 30 mm when using a 25-mm long concrete anchor (also available in 40-mm lengths). NB: Begin with three points of attachment (at the ends and middle of each girder).
Drop the concrete anchor through the screw.
Secure the concrete anchor using an installation mandrel, cat. no. 850. See page 10.
The frame girders are now in place, adjusted to 10 mm below the final girder height.
Follow the same attachment and height adjustment method for all other girders as used for the frame girders (10 mm lower than the final height with three points of attachment).
14 15
6. Trimming and adjustment of adjustment screws
7. Recessing adjustment screws
Once all girders have been adjusted to 10 mm under the final height with three points of attachment in each girder, the girder screws must be trimmed even with the tops of the girders. Trim the screws using a chisel.
Once the screws at the three points of attachment in each girder have been trimmed, all girders are adjusted 10 mm upward to their final height.
NB: The reason for trimming the adjustment screws and for the girders being adjusted upward 10mm only after trimming is to prevent the upper edges of the adjustment screws from coming in contact with the overlying floor covering installed later. This pro-cedure ensures that they are recessed into the sec-tions. “Bridging” in the sound insulation would oth-erwise occur if the upper edges of the screws were in contact with the floor covering.
16 17
8. Adjustment of adjustment screws
After the girders have been installed and adjusted upwards at their three points of attachment to the final, correct height, attachment of all other adjust-ment screws in the girder holes is begun; the blocks with the dampening elements are pre-fitted.
NB: The screws are threaded down into the respec-tive girders with the blocks so that there is about 10 mm remaining to the subfloor (see the figure at the upper right).
The screws are thereafter trimmed and threaded down towards the subfloor.
Approximately 10 mm of clearance between adjustment screw and subfloor
10 mm
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9. Recessing adjustment screws
Lastly, the screws are secured using the same method as previously described for the concrete anchors.
After all girders are properly secured to the subfloor and adjusted to their final height, all points of attach-ment must be checked to ensure that all screws are recessed into the girders.
On some projects, concrete anchors can be replaced with concrete screws, alternatively concrete nails, set in place using a bolt gun. (NB: Not recommended for prefab subfloors of the type HDF)Wood screws are used with wooden subfloors.
10. Alternative attachments
Carefully follow the points on the checklist for the installer's inspec-tion on pages 22–23.
NB: If any screw projects above a girder (so that it can come in contact with the subsequently laid floor cover-ing), it must be recessed. This is done using Granab's cutting drill bit for recessing adjustment screws, cat. no. 8600, that is included in the standard set of installation tools (see the accessories on page 10).
Lastly, check that all screws are properly secured to the subfloor.
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11. Door openings, thresholds, cover mouldings, System 3000
12. Door openings, thresholds, cover mouldings, System 7000
A board is placed on the girder flanges as a founda-tion for subsequent installation of a door threshold or cover moulding (NB: Not chipboard).
The girder is installed at the centre of the door opening so that the board has the same height difference as other girders. The board must be screwed and glued to the girder in the door open-ing. The board is used for subsequent installation of a threshold or cover moulding.
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13. Installation at high height
15. Installation of skirting
14. Installation at extra high height
For construction heights over 250 mm, the floor covering can be attached at the room corners for lateral stabilisation.
As standard, the level of the Granab Subfloor System 7000 can be adjusted up to 420 mm. If heights are preferred 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 secured to Granab girders with Superset no. 3879 or equivalent and self-tapping screws. NB: Mounting screws may not come in contact with adjustment screws/blocks.
When attaching the skirting, it must be pressed hard down against the floor covering.
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16. Installation of plastic film on Granab girders in moist environments NB: The plastic film is installed above the girders – not directly on the concrete subfloor.
Installation, floating parquet
Masonite beam installationInstallation, floating 22-mm chipboard
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.
Granab systems, including girders, are entirely non-organic and not affected by moist environments. By placing the plastic film over the girders, effective moisture protection is obtained against the floor layer above.
Plastic film used in installation of masonite lightweight beams. NB: The plastic film is placed under the masonite beam.
Ventilated subfloors when moisture, mould or radon is present
Granab subfloor systems entail:
• Freeairflowbetweenfloorgirdersandbottomslab.
• Attachmenttomechanicalnegativepressureventi-lation equipment ensures good ventilation between the bottom slab and floor.
• Toprotectthefloorcoveringagainstmoisture,plas-tic film is laid above the galvanised steel girders, which in combination with mechanical negative pressure ventilation ensures an environment free from moisture.
• Granabsubfloorsystemsarealsousedinradondecontamination.
Order our ventilation pamphlet for more information.
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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
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CHECKLIST 1 – Installation, subfloor systemInstaller's inspection of Granab Subfloor System 3000/7000
Subfloor system installation
1. The installation surfaces for the subfloor system must be carefully swept and vacuumed so that no organic or other residual materials remain on the subfloor/floor surfaces.
2. All adjustment screws are threaded (recessed) into the floor gird-ers by at least 10 mm (after any trimming) so that no adjustment screws come in contact with the floor covering.
3. The heights of all floor girders are adjusted so that they are the same.
4. There is clearance of at least 10 mm between the floor sections and adjoining walls.
5. There is clearance of at least 5 mm after trimming the sections.
6. All adjustment hardware is secured to the subfloor.
7. Installations in and beneath the subfloor system have at least 5 mm of clearance to other components of the the subfloor system.
8. Installation of the subfloor system has been conducted according to the provided installation instructions.
Inspection (check off)
Company:
Installer:
Object: Flat no.:
Date Supervising installer
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CHECKLIST 2 – Installation, floor coveringInstaller's inspection of Granab Subfloor System 3000/7000
Installation, floor covering
1. Cleaning is to be carefully checked prior to installation of the floor covering so that no organic or other residual materials remain under the subfloor system.
2. NB: Trimming and other tasks involving the floor covering may not be conducted so as to cause contamination (such as with sawdust) of the cleaned floor surface.
3. There is clearance of at least 5 mm between the floor and adjoining walls.
4. Chipboard flooring: When attaching chipboard, no glue has come in contact with the adjustment hardware. The instructions from the manufacturer have been observed for the used flooring sheet.
NB: Ensure that the screws used to secure the chipboard do not extend into the underlying adjustment unit and dampening pad.
5. Parquet: Instructions from the manufacturer for the parquet used have been followed. Flooring paper has been used as an interlayer between the chipboard and parquet.
6. For construction heights above 250 mm, the chipboard sheets are attached at the room corners so as to attain lateral stability (see point 13 on page 19).
Inspection (check off)
Company:
Installer:
Object: Flat no.:
Date Supervising installer
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
