Granabmontering_eng

GRANAB SUBFLOOR SYSTEMS INSTALLATION INSTRUCTIONS

Granab Subfloor Systems 3000 and 7000 have been tested and certified by the SP Technical Research Institute of Sweden.

Welcome to Granab AB 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.

Bygg- och Miljöteknik Granab AB Phone: +46 (0) 322-66 76 50 Fax: +46 (0) 322-66 76 55 E-mail: epost@granab.se www.granab.se Mailing address: P.O.Box 172 SE-447 24 Vårgårda Sweden Street address: Verkstadsgatan 4 Vårgårda, Sweden

2

CONTENTS: Granab Subfloor System 3000

4

Design

Granab Subfloor System 7000

5

Design

Planning instructions

6

For various load conditions

Alternative floor coverings

7

Chipboard & carpet, chipboard & parquet, floating parquet

Planning

8-9

Drawings, delivery optimisation and installation drawings

This is what you need

10 - 11

Installation tools, girder spacers, height adjustment, trimming girders, ergonomic tools

Installation, step by step

12 - 20

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

Ventilated subfloors

20

Moisture, mould, radon

Tiled surfaces, bathrooms

Checklist 1 – 2

21

22 – 23

Installer's inspection of Granab Subfloor Systems 3000/7000

3

Granab Subfloor System 3000 for adjustable heights 30-180 mm, excl. floor covering

26,5 17

45

17

79

MIn. height 30 mm

Max. height 180 mm

Section with support block and dampening element, level adjustment screw and concrete anchor

Construction heights: Flexible construction heights from 30 to 180 mm, excl. floor covering

With supplementary sheet between the girders

22-mm parquet, alternatively 22-mm chipboard & 15-mm parquet or carpet

20

600

600

General installation drawing, Subfloor System 3000 – Residential

400

600

600

600

600

600

600

400

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.

4

Granab Subfloor System 7000 for adjustable heights 70-420 mm, excl. floor covering Special heights up to 1000 mm (see page 19)

40

Adjustment heights 70-420 mm

45

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 19)

Section with support block and dampening element, level adjustment screw and concrete anchor

22-mm parquet, alternatively 22-mm chipboard & 15-mm parquet or carpet

20

600

600

General installation drawing, Subfloor System 7000 – Residential

400

600

600

600

600

600

600

400

20

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.

5

Planning instructions for various load conditions, Granab Subfloor Systems 3000 and 7000 Recommended c/c distance between floor girders (sections) and support blocks, Systems 3000/7000: 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 childcare 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, girders (sections), 400 mm.

4. Spaces without fixed seating in churches, concert halls, theatres, cinemas, museums, exhibition halls, retail areas in department stores and shops, gyms, sports centres, dancehalls, corridors in schools, etc., c/c distance girders (sections), 300 mm.

Load capacity For 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 specifications of the respective flooring manufacturers.

System 3000 1st – 2nd girders, 400 mm

c/c distance between floor girders (sections), 600 mm

c/c distance between support blocks, 600 mm

Distance from wall, approx.

40 mm

System 7000 1st – 2nd girders, 400 mm Distance from wall, approx.

20 mm

6

c/c distance between floor girders (sections), 600 mm

c/c distance between support blocks, 600 mm

Examples of alternative floor coverings Follow the instructions for installation and laying from the respective chipboard and parquet manufacturers.

22-mm chipboard & 15-mm parquet

NB: Use flooring paper as an interlayer between the chipboard and parquet.

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: Use intermediate strips of flooring paper.

NB: Casco Superset no.

3879 or equivalent

WC/Bathroom

Entrance/Hall

Tiles

7

Planning, logistics efficiency Delivery optimisation

Granab 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.

BALKONG CA 6,5 m2

2600 2600

1360

670

380

760

1520

1620

820

2360

300 830

1460

1360

300

360

2600

1080

2600

1080

2210 2600

310

500

2040

500 320

2600 2600

SOVRUM 3 2210 CA 11,5 m2 2210

1080

2600

2600

SOVRUM 2 CA2600 8,5 m2

2520

2210

1080

2600 2370

500

440

1360

2600

300

2450 1570

1100

1240

1620

2600

300

500

300

2460

450

2690

1520

2600

KÖK/V-RUM CA 30 1080 2600 m2 2600 (V-RUM CA 20 m2) 1080

2600

2460

2600 1630

1520

2600

730

2600

950 2530

2090

300

300

250

2000

1520

1470

1500

1500

650

850

1700 990

300

2360

300 530

300

2360

SOVRUM 1 CA2360 12,5 m2

300

500

2360

2360

300

2360 1970

HALL 2000

850

300

2600 850

2820

SOVRUM 2360 1 CA 11,5 2360 m2

300 1460

300

2360

1110

2450 2360

2600

2600

2600

510

1110

300

2600

1110

2600

300

2360

2600

1110

2600

2360 850 2600

1110

300

1520

2600

2600

2450

2600

BALKONG CA 6,5 m2

1110

300

2480

2600

2600

850

2600

500

1520

2600

2600 2600

1470

300

1110

2600

HALL1510

2380 2600

1110

2600

2600

1520

2600

2600

750

850 1460

1510

2600

WC/DUSCH CA 5,5 m2

KLK 1220 WC CA CA 2,5 m21310 E 1,5 m2

2820

1110

2390 2600

450

2600

340

1110

580

850 1550 1550

850 300

1230

2600

2600

1520

2600

2000

2450

WC/DUSCH CA 5,5 m2

1220

FRD 1430

2600

1460

2600

1520

2600

760

1310

8 520 30

2 m2 E CA 1520

1410

2450

WC/DUSCH CA 5,5 m2

1370

2600

KÖK/V-RUM CA 33 2600 m2 (V-RUM2600CA 23 m2)

2600

2380

640

2600 310

2600

500 360

2600 1320

1360

850

2430

950

1370

380

1370

2600

1070

2600

2600

1560

2600

1070

2600

2600

2430

1070

370

740

500 300

1320

1320 2600

1320 1320 950

2390

1070

2600 2600

2600

2340

850

KLK CA 23403,5 E m2 2340

520

m2

2580 850

HALL 2600

1550

2600

2600

300 850 2600

1460 850 KLK 1530

1070

KÖK/V-RUM CA 30 1070 m2 2600 (V-RUM CA 20 m2)

1070

640

1500

300

300

2450

2600 2600

1,5 E CA 1430

2120 310 1120

HALL

WC/DUSCH CA 5,5 m2

2360

340

960 1070

2600

2030

1370

2600

500

300

2350 2600

1620

2600

2600

1590

2460

2600

1200

500

2480

300

1460

1460

2280

2480

300

1370

2600

500 330

300

300

990

2010

2600

300

2360

2600

500

310 1370

2480

2360

2600 2290

2450 2600

2480

SOVRUM 1 2480 CA 11 m2 2480

300

2600

380

1370

300

1880

500

300

1500

1370

2600

2360 SOVRUM 2 CA 12,5 m22360

850 1740

850

570

300

2460

950

490

650

2600

300

2360

2460

2600

1320

1580

2600

530

2360

1810

1090

300

1810

2600

2250 2600

1090

1770

500

2600

2600 1320

2350

1520 1980

500

1090

2600

720

2250

2350 2600

300

2460 SOVRUM 1 CA 12,5 m2 2460

2250

1090

300

2600

2600

850 2600

1090 720

500 1600

2600

1090

330

2460

0

2600

KÖK/V-RUM CA 33 2600 m2 2600 CA 23 m2) (V-RUM

2250

SOVRUM 2 CA 2250 9 m2

500

2460

49

1090

2250

400

2250

2250

2260

2600

2160

BALKONG CA 6,5 m2

1090

1540

1090

2600

720

2600 2600

340

950

1080 500 300

960

2210 1930

BET

ANT

ÄNDRINGEN AVSER

SIGN

DATUM

KV.UGGLAN VEIDEKKE SVERIGE

BALKONG CA 6,5 m2

GRANAB AB BOX 172 447 24 VARGARDA UPPDRAG NR

RITAD AV

HANDLÄGGARE

Claes-Goran Andreasson

DATUM

ANSVARIG

SKALA

NUMMER

071116 GRANAB S-7000 PLAN 2-5 HUS 1 GR 1:75 1:50(A1)

Packaged and labelled for each flat 8

BET

Planning, logistics efficiency Interior walls for finished Granab subfloors

Walls for flats or other subdivisions are first erected from floor to ceiling. 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.

10x21M 10x21M

2600

2600

2600

2600 SOV2 6.6 m²

1

1

2600

2600

2600

2600

2600

2600

2600

2600

1910

2600

2600

2600

2600

2600

2600

2600

1910

2600

2600

2600

2600

2600

2600

2600

2600

1910

2600 2600

2600

2600

2600

2600

1960

2600

2600

1960

2600

2600

1960

2600

1960

BOD 4.5 m²270

8x21M

2600

2600 2600

2600

1950

2600

SOV1 6.9 m²

9

2600

2600

2600

1

1950

2420

10x21M 2600 BAD/VASK/OMKL. 2600 7.5 2600 m²

0 53

32

2600

1880

2570

00 26

300 300

2600

300

300

24102520 2410

800

28x21M

6

380

2530 2460

300

2460

300

2460

300

TERRASSE 9.9 m²

300

BAD/VASK/OMKL. 7.4 2410 m²

300

10x21M

300

2410

300

2410

300 300 300

2

2600

300

600

2600

950 80

2600

SOV1 11.8 m²

2

2420 2420

2520

2510

2560

2440

410

560 660

2380

300

1400

2600

4

300

41

0

2380

2500

2520 1810

950

2600

950

2270 0

300

430

2600

1200

2600

2600

2140

1 350

2600

2600

2600

2600

2600

2600

2600

2600

2600

1

1960

1960

2600

2

1480

10x21M

2600 2410

300

2

2600

1740

2600

1740

2600

1740

2330

1

2600

2600

2600

2600

SOV2 10.4 1740 m²

2600

1740

2600

2600

1740

2600

2600

1810

1960

SOV2 6.6 1960 m²

8x21M

2460

2600

10x21M

80

20

18

TERRASSE

920

2600 2600

2120

10x21M

11

m²

2410

11

2000

1680

2410

1430

2560

2600

9

1960

5

2600

STUE/KJØKKEN 37.8 m²

1960

2600

1950

2600

2600

1950

2600

2600

2600

2600

BET

ANT

ÄNDRINGEN AVSER

SIGN

DATUM

KV.RONNVIKVEIEN

1950 2020

GVJ

9x21M

16

390

1970

9x21M

870

2600

2600

260010x21M 1480

2600 2410

300

143010x21M

1230

2600

1

2600 2600

1480

1

1430

1430

300

2

300

300

1960

1950

2600

2600

STUE/KJØKKEN 28.4 2600 m²

8x21M

2600

430 2600

1960

2600

STUE/KJØKKEN 2600 39.5 m²

300

300

2600

5

2600

2600

2600

2600

430 2600

2600

2600

2600

6

2600

8x21M

1

2600

430

2500

1

2600

340

HALL 1480 4.7 m²

2600

2600

2400

2600

2600

5

2600

2600

2600

SOV2 6.6 2600 m²

2600

2600

2600

2600

2600

1580

4 1190

9

2600

HALL 7.8 m²

2600 2400

10x21M

300

410

1410

2330

1

2140

1430

2540

10x21M

2600

1430

2600

10x21M

WC

3.9 1680 560

2470

2600

940

1 2600 2600

1680

SKAP 2.6 2600 m²

940

2600 1880

1680

10x21M

2600

GANG 13.8 m²

10x21M

2600

940

1680 2400

2400

1010

2600

1430

HALL 7.8 m² 2600

1230

80 420

1

2600

2600

8

1500

EL-SKAP 0.6 m² 10x21M

1430

2600

2 1800 1680

2400

2600

1170

2600

2180

SKAP/BOD 3.2 m²

2600

11

300

2600

m²

1430

12 2600

8 SKAP

2600 2.6

2600

2600

1100

1170

2600

20

300 300

2520

1100 2470

2600

10x21M

1320

GANG 10.3 m²

2600

10x21M

2600

300

2410 2410

1100

10x21M 1100

1720

300

2410

10x21M

1100

1910

2600

12

300

2410

2

430

1500

10x21M

300

1100

680

2

1910

1910 8x21M 2600

440

STUE/KJØKKEN 40.7 m²

2600

11

820

2600

2600

950 2310

300

10x21M

820

2600

800

10x21M 2600

4.1 m²

400

300

2410

4.1 m²

10x21M 1600

820

2600

HALL 1100

HALL 1100

820 820

2600

9

1

820 820 820

BAD/OMKL. 2600 8.6 2600m²

2330

2410

1100

2600 950

2310

300

300

300

2410

1170

2600

2 600

950

24102520

1100

2400

SKAP/BOD 3.2 m²

2600

BAD/VASK/OMKL. 2410 7.4 m²

12

2600

2

1170

690

2400

9

9

2600 2400

2600

870 2600

10x21M

2600

10x21M

300

300

2600

2460

2600

90

660

10x21M

GANG 10.3 m²

2600

2380

300 10x21M

2600

2

680

2440

520

270

6

2380

2460

SOV1 11.8 m²

560

300 300

820 820

10x21M 560

4

300

10

1720

2530 2460

2440

m² 1870 1280

300

1890

2500

WC

1870 3.9

0

380

300

TERRASSE

40

0

53

2600

2600

1870

11

800

820

2600 2600 0

1400

2600

2600

32

00

26

2600

28x21M

820

8.6 m²

2600 2600

820

2600BAD/OMKL.

2 2600

880

TRAPPEROM 21.1 m²

2600

940

1320

1870

2000

820

2600

11

1870 2600

820

1810

2600 2180 1870 2 1970

1900

1010 820

2310

1 2560

2

2600

2600

950

940

2600

2600

2600

10x21M

2600

430

2600

10x21M 2600

2600 2600

880

400

2600

1 940

2420

2600

2600

950

10x21M 1550

2600 STUE/KJØKKEN 40.7 m²

2560

2600

1910

SOV11910 6.9 m²

1

2600

2600 2600

2600 SOV3 8.4 m²

9 10

2600

1980

SOV3 1910 8.4 m²

1

1790

1910

2600

2600 8x21M 2600

2600

2600

2600 2600

SOV2 6.6 m²

1

12

2600

390

2600

2600

2260

2600 410

2600

2600

2600

2600

1

6.9 m²

2600

2600 SOV1

2560

2600 2600

300

1980

TERRASSE 11.3 m²

TERRASSE 9.5 m²

GRANAB AB BOX 172 447 24 VARGARDA UPPDRAG NR

RITAD AV

HANDLÄGGARE

Claes-Goran Andreasson

DATUM

ANSVARIG

SKALA

NUMMER

080214 GRANAB S-7000 PLAN 1-4 HUS C

1:50(A1)

GR 1:73

BET

Intra-transport in conjunction with framework construction Because Granab systems consist of non-organic materials and are not affected by moisture or temperature variations, 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.

Girders are pre-cut to the correct lengths according to the drawing for each room unit.

9

Installation tools, Granab Subfloor Systems 3000 and 7000 Mandrel for recessing in predrilled holes

Screwing tool for adjusting floor girder heights For screwdrivers Short model: Cat. no. 8100 Long model: Cat. no. 8200

Drill bit for recessing adjustment screws in girders Cat. no. 8600

Mandrel for final fixation

Mandrel for installation of concrete 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

Screwing tool for manually adjusting floor girder heights Short model: Cat. no. 8300 Long model: Cat. no. 8400

Concrete drill bits for concrete anchors.

Cat. no. 8700, 250 mm, short Cat. no. 8800, 460 mm, long

Installation pipe for concrete anchors Cat. no. 8900

Accessories Girder spacers

Cat. no.

9300 9400 9500 9600

Tool Girder spacing 300 mm Girder spacing 400 mm Girder spacing 500 mm Girder spacing 600 mm

Automatic screwdriver

Chipboard flooring screws Insulation anchor, system 7000 FĂśr isoleringstjocklek A 20

Automatic screwdriver type HILTI, 4000 rpm unit. For chipboard flooring screws.

Contact Granab.

10

Self-tapping screws for chipboard. Contact Granab.

70

Insulation thickness, A mm: 40, 80, 120 or as agreed.

Cat. nos. 7040, 7080, 7120

Insulation bracket System 3000

Insulation bracket System 7000

System 3000 with built-in insulation bracket in the section for 25-mm insulation

Insulation thickness, A mm: 40, 80, 120 or as agreed.

Cat. nos. 7040, 7080, 7120

Level adjustment

Trimming girders

with laser levelling

with compass saw

Ergonomics during installation

Screwing tool, long Cat. no. 8200

Mandrel, long Cat. no. 850C

Installation pipe for concrete anchors Cat. no. 8900

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.)

11

Installation, step by step Granab Subfloor Systems System 3000

System 7000

1. Support block and dampening

element

Sections with support blocks and dampening elements, level adjustment screws and concrete anchors

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 subfloor 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.

Carefully follow the points on the installer's checklist on pages 22–23.

12

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.

2. Laying out girders

3. Height adjustment,

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 distance, girders, on page 6.

When using installation instructions prepared by Granab for specific projects, follow the specifications for girder locations on the layout drawing.

frame girders

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.

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.

13

4. Attachment of frame 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 10Â mm below the final girder height.

14

5. Other girders

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).

6. Trimming and adjustment of

7. Recessing adjustment screws

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 procedure ensures that they are recessed into the sections. “Bridging� in the sound insulation would otherwise occur if the upper edges of the screws were in contact with the floor covering.

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8. Adjustment of adjustment screws

Approximately 10 mm of clearance between adjustment screw and subfloor

10 mm

After the girders have been installed and adjusted upwards at their three points of attachment to the final, correct height, attachment of all other adjustment screws in the girder holes is begun; the blocks with the dampening elements are pre-fitted.

NB: The screws are threaded down into the respective 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.

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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 attachment must be checked to ensure that all screws are recessed into the girders.

NB: If any screw projects above a girder (so that it can come in contact with the subsequently laid floor covering), 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.

10.

Alternative attachments 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.

Carefully follow the points on the checklist for the installer's inspection on pages 22–23.

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11.

Door openings, thresholds, cover mouldings, System 3000

A board is placed on the girder flanges as a foundation for subsequent installation of a door threshold or cover moulding (NB: Not chipboard).

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12.

Door openings, thresholds, cover mouldings, System 7000

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 opening. The board is used for subsequent installation of a threshold or cover moulding.

13.

Installation at high height

For construction heights over 250 mm, the floor covering can be attached at the room corners for lateral stabilisation.

14.

Installation at extra high height

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:Â Mounting screws may not come in contact with adjustment screws/blocks.

15.

Installation of skirting

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

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 chipboard

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.

Masonite beam installation

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: • Free airflow between floor girders and bottom slab.

• Attachment to mechanical negative pressure ventilation equipment ensures good ventilation between the bottom slab and floor.

• To protect the floor covering against moisture, plastic film is laid above the galvanised steel girders, which in combination with mechanical negative pressure ventilation ensures an environment free from moisture.

• Granab subfloor systems are also used in radon decontamination.

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Order our ventilation pamphlet for more information.

Tiled surfaces 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

Bathrooms C B A

A: Chipboard flooring, 22 mm

B: Sheet of non-organic material

C: Floor levelling compound

General drawing for tiled area

21 C

C

B

A

CHECKLIST 1 – Installation, subfloor system Installer's inspection of Granab Subfloor System 3000/7000

Company: Installer: Object:

Flat no.:

Subfloor system installation

Inspection (check off)

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 girders 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 5Â 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.

Date 22

Supervising installer

CHECKLIST 2 – Installation, floor covering Installer's inspection of Granab Subfloor System 3000/7000

Company: Installer: Object:

Flat no.:

Installation, floor covering

Inspection (check off)

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).

Date

Supervising installer 23

Bygg- och Miljöteknik Granab AB Phone: +46 (0) 322-66 76 50 Fax: +46 (0) 322-66 76 55 E-mail: epost@granab.se www.granab.se Mailing address: P.O.Box 172 SE-447 24 Vårgårda Sweden Street address: Verkstadsgatan 4 Vårgårda, Sweden