Usg Donn Dwall-16

CI/SfB (35) Xh2

Screw Fix Rapid FixWall to Wall

DONN DXSF Suspension Systems for Plasterboard Ceilings

The USG DONN DX Screw Fix range represents a major breakthrough in plasterboard ceiling construction and is another example of USG's excellence in innovation and system engineering. The USG DONN DX Screw Fix range is a pre-engineered ceiling suspension system created to reduce the design and installation difficulties associated with plasterboard ceilings.

Flat Plasterboard CeilingsThe pre-engineered components of the USG DONN DX Screw Fix range can be quickly connected to form attractive, rigid plasterboard ceilings. The system eliminates the labour-intensive practice of connecting furring profile to channel profile. In contrast to conventional plasterboard suspension systems, the USG main tees with pre-indexed cross tee hole locations significantly reduce time spent measuring cross member locations.

TransitionsNo other suspension system gives you the flexibility to make easy transitions from soffits, flat to curved plasterboard ceilings. Transitions from plasterboard to acoustical ceilings are also easily accomplished.

Additional InformationThis technical brochure will guide you through the details of the USG DONN DX Screw Fix range. For samples - which now include DONN DX Rapid Fix and DONN DX Wall to Wall system for spanning shorter distances in corridors and small rooms - or for technical assistance, call our Customer Service/Technical Department on 0191 586 1121.

About USGWorld wideUSG has been a leader in the building materials industry for 100 years. Our products can be found in buildings where people live and work, in more than 125 countries throughout the world.

Headquartered in Chicago, USA, we have offices throughout the U.S., Europe, Canada, Mexico, Middle East and Asia/Pacific. With sales in excess of $5 billion, we are the world’s largest producer of gypsum wallboard and a leading manufacturer of ceiling components and systems. USG is the world’s leading manufacturer of ceiling grid – in fact, DONN brand DX grid can be found in more ceilings, world wide, than any other supplier.

EuropeUSG’s European operations are based on four regional sales and manufacturing organisations: in France (Dreux); Germany (Viersen); Russia (St. Petersburg); and United Kingdom (Peterlee). ISO 9000/BS 5750/EN 29000 programmes have been implemented in all USG European plants. Strict quality assurance procedures covering manufacturing and finished products are your guarantee of complete satisfaction.

USG sales offices throughout western and eastern Europe provide local expertise and support to an extensive distribution and sales network, ensuring that products can be delivered wherever you need them - on spec and on time.

�

DONN DXSF Suspension Systems for Plasterboard Ceilings

�

Contents

�

Flat plasterboard ceilings

Flat plasterboard ceilingsFeatures and benefits

The pre-engineered cross tees and main tees of the USG DONN DX Screw Fix range join easily for rapid installation. The tees lock in place to form a rigid, square, level structure to which plasterboard is easily attached.

Feature Benefit

Pre-indexed hole locations on main tees Reduces measuring, aligning, and squaring time significantly

Quick insertion of DONN cross tees into main tee Faster installation; eliminates labour-intensive practice of connecting furring profile to channel profile; substantial labour cost savings

DONN DX Quick-Release™ clip on cross tees Removes without tool

Integral main tee splices Fast, locked-in connections, no overlap waste or fixings

System flexibility Easily transitions from soffits, flat and curved surfaces Also transitions to acoustical ceilings

USG accessories Allow easy creation of a variety of details (see page 5)

Knurled face on DX components Easier screw attachment

Heavy-duty main tees, 40mm face width Heavy-duty systems for all applications improve flexibility for increased load bearing capability

Hot dipped galvanised steel Protection against corrosion in high humidity environments

Fire rated assembly 60 minutes structural fire protection in accordance with BS 476 pt.23

Perimeter channel trim Holds grid sections securely without the need for additional screw fixings

Introduction��2-3

DONN DX Screw Fix range��4-5

DONN DX Screw Fix�� 6

DONN DX Rapid Fix�� 7

DONN DXWW Wall to Wall system��8-9

Accessory selector�� 10

Transition to acoustical ceilings�� 11

Soffits��12-13

Frequently asked questions��14-15

�

DONN DXSF Suspension Systems for Plasterboard CeilingsConstruction details

�

USG DONN DX Screw Fix suspension system is designed to install quickly, easily, and inexpensively.

DXSF Range Selection Chart

Properties DX Screw Fix DX Rapid Fix DX Wall to WallFast installation of plasterboard ceilings a a a

Pre-punched holes for fast setting out a a aAbility to insert cross tees for integration of services a a a40mm wide tee face for flexible board location a a aKnurled tee face for positive screw location a a aPerimeter channel to secure ends of all tees a a aCarry ceiling loads up to 19.85 kg/m2* a r rCarry ceiling loads up to 15.00 kg/m2* a a rFire rated ceiling assemblies a r rUse in corridors and small areas with maximum span of 3.6m r r aUnsupported span up to 1.8m** r r aShallow void depths (as little as 50mm) a a aSimple transistion from plasterboard to acoustical ceiling a a rEasily create bulkheads and other details a a r

* - Based upon main runners and hangers spaced at 1200mm crs** - Based upon a maximum board weight of 8kg/m2

450mm max.

cross tee

main tee splice

main tee

fire expansionnotch

rigid hanger

gypsum board

�

A

➊

➋

➌

➍

DONN® DX Screw

Fix and Rapid Fix assembly

�

Typical grid layout to suit 1800 x 900mm and 2400 x 1200mm boards

Component quantities for DONN DX Screw Fix (per m2 ceiling)

Nr Description Item reference

Module (board size) 1800 x 900mm 2400 x 1200mm

Quantity Spacing Quantity Spacing

➊ Main Runner DXSF40Q H360X 0.833 lin m B - 1200mm 0.833 lin m B - 1200mm

➋ 1200 Cross Tee DXSF 120 2.23 lin m D - 450mm 1.66 lin m D - 600mm

➌ Perimeter Channel DCSF41X30X19 - -

➍ Rigid Hanger DGA5 0.694 no A - 1200mm 0.694 no A - 1200mm

Component quantities for DONN DX Rapid Fix (per m2 ceiling)

Nr Description Item reference


Quantity Spacing Quantity Spacing

➊ Main Runner DXSF40X H360 X 0.833 lin m B - 1200mm 0.833 lin m B - 1200mm

➋ 1200 Cross Tee DXSF 120 2.23 lin m D - 450mm 1.66 lin m D - 600mm

➌ Perimeter Channel DCSF41X30X19 - -

➍ Rigid Hanger DGA5 0.694 no A - 1200mm 0.694 no A - 1200mm

Board fixing as per board manufacturers recommendations

DONN® DX Screw Fix and Rapid Fix assembly

7

B

DONN® DX Screw Fix

Specification DONN DXSF

Grid shall be DONN DXSF Screw Fix concealed grid system for fixing of gypsum and other boards. Hot dipped galvanised steel ' T ' section with knurled hot dipped galvanised steel capping for easier screw attachment. Table width 40mm. To suit variable module sizes, most typically accomodating board sizes 1800 x 900mm and 2400 x 1200mm.

Main runners: 38 x 40mm, ref DXSF40Q H360X shall be normally spaced at 1200mm centres and suspended from the structure or soffit using 25 x 25mm HDG steel angle section, ref DGA5, fixed to main runners using appropriate self drilling screws or nut and bolt fixings, at typically 1200mm centres. First hanger shall be no more than 450mm from the perimeter. Main runners joined end on by means of the integral splice. Splice connections shall be supported within 150mm with a hanger, and shall be staggered across the ceiling area.

Cross tees: 1200mm cross tees, 38 x 40mm ref DXSF120, shall be installed perpendicular between the main runners at either 450mm or 600mm centres dependant upon the board size being used. All cross tees feature a ‘joggled’ end detail.

Perimeter trims: 41 x 30 x 19mm knurled hot dipped galvanised steel channel trim ref DCSF41X30X19, fixed to perimeter wall using fixings appropriate to the structure at maximum 450mm centres. Cut ends of main runner or cross tees will fit into the web of the channel to be held secure when fixing boards up to the grid.

Hangers: Shall be 25 x 25mm HDG steel angle section, ref DGA5, fixed to main runners using appropriate self drilling screws or nut and bolt fixings. Hangers shall be normally spaced at 1200mm centres although alternative spacings are acceptable provided maximum loadings stated above are not exceeded. Hangers to be fixed to structure or soffit using fixings appropriate to the structure or soffit.

Short�Cross�Tee�DXSF60�(where�applicable)

Long�Cross�Tee�DXSF120

Main�Runner�DXSF40Q�H360X

40mm

40mm

40mm

40mm

40mm

40mm

40 mm

66

Maximum allowed weight of tiles per m2 of ceiling

ModuleMain runner 1200 Main runner 600

„�Hanger dist (mm) 1800 x 900 2400 x 1200 1800 x 900 2400 x 1200800 36.2 36.93 - -

1000 36.2 36.93 - -1200 19.46 19.85 38.91 39.71500 7.01 7.15 14.01 14.3

Note: The load per m2 must be distributed uniformly (no point loads) over the ceiling area. After loading, the deflection of any grid component will remain within the maximum deflection per span as stated in BS: 8290: 1991, provided the grid layout is as presented in the sketch. Maximum loads above have been determined by calculation.

Features and Benefits

Featuring a heavy duty main runner for increased strength, DONN DXSF Screw Fix is the highest specification in the Screw Fix range of products, offering maximum performance.

Use DONN DXSF Screw Fix where double skin board finishes are required, supporting a load of up to 19.85kg/m2 under normal grid configuration.

DONN DXSF Screw Fix is designed for fire rated ceiling assemblies, tested in accordance with BS 476: part23 with various brands of plasterboard. Contact USG Technical dept for further details.

Where specialist boards, e.g. USG Fiberock Clima-Tough Interior board, are to be used as a ceiling lining, DONN DXSF Screw Fix system is capable of carrying the heavier loads associated with these boards. See loading information for details.

Where ‘double hung’ ceilings are installed, DONN DXSF Screw Fix may be utilised without additional hangers. Contact USG Technical dept for further details.

System characteristics:

• Fast and simple to install – up to 50% faster when compared to conventional gypsum ceiling suspension systems

• Pre-indexed hole locations on main tees reducing measuring, aligning and squaring time

• Pre-engineered splice – eliminating overlap waste and connection time

• Patented QUICK-RELEASE™ clip design: easy to remove without tools

• Knurled face on DX components – easier screw attachment

• System flexibility – easy transitions from soffits, flat and curved surfaces Easy transitions to acoustical ceilings and USG speciality range, Curvatura, Compässo, DXC

• Multi transitional features including borders to acoustical ceilings, boxed soffits, upstands etc.

The original drywall ceiling grid tried, tested & proven


NEW DONN DX Rapid Fix from USG is an economical way of installing monolithic plasterboard ceilings quickly and easily. With a standard duty main runner. DONN DX Rapid Fix is suitable for most plasterboard ceiling installations.

Use DONN DX Rapid Fix where single skin board finishes are required, or double skins of thin board with a maximum load of up to 15.00kg/m2 under normal grid configuration.

DONN DX Rapid Fix is suitable for use with many performance boards such as abuse or sound resistant plasterboards.

NOT SUITABLE for fire rated ceiling installations.


• Fast and simple to install – up to 50% faster when compared to conventional gypsum ceiling suspension systems


• Pre-engineered splice – eliminating overlap waste and connection time

• Patented QUICK-RELEASE™ clip design: easy to remove without tools


• System flexibility – easy transitions from soffits, flat and curved surfaces Easy transitions to acoustical ceilings

• Multi transitional features including borders to acoustical ceilings, boxed soffits, upstands etc.

DONN® DX Screw

Fix and DONN® DX Rapid Fix

��

DONN® DX Rapid Fix

The low cost solution for drywall ceiling grids


Long�Cross�Tee�DXSF120

Main�Runner�DXSF40X�H360�X

40

40

40

40

28 mm

2400 mm, 3000 mm, 3600 mm

41 mm

19 mm

30 mm

3000 mm

40 mm

Maximum allowed weight of tiles per m2 of ceiling

ModuleMain runner 1200 Main runner 600

„�Hanger dist (mm) 1800 x 900 2400 x 1200 1800 x 900 2400 x 12001000 27.5 28.0 - -1200 14.7 15.0 29.5 30.11500 - 7.15 10.6 10.8


Specification DONN DX Rapid Fix

Grid shall be DONN DX Rapid Fix concealed grid system for fixing of gypsum and other boards. Hot dipped galvanised steel ' T ' section with knurled hot dipped galvanised steel capping for easier screw attachment. Table width 40mm. To suit variable module sizes, most typically accomodating board sizes 1800 x 900mm and 2400 x 1200mm.

Main runners: 38 x 40mm, ref DXSF40X H360 X shall be normally spaced at 1200mm centres and suspended from the structure or soffit using 25 x 25mm HDG steel angle section, ref DGA5, fixed to main runners using appropriate self drilling screws or nut and bolt fixings, at typically 1200mm centres. First hanger shall be no more than 450mm from the perimeter. Main runners joined end on by means of the integral splice. Splice connections shall be supported within 150mm with a hanger, and shall be staggered across the ceiling area.

Cross tees: 1200mm cross tees, 38 x 40mm ref DXSF120, shall be installed perpendicular between the main runners at either 450mm or 600mm centres dependant upon the board size being used. All cross tees feature a ‘joggled’ end detail.

Perimeter trims: 41 x 30 x 19mm hot dipped galvanised steel channel trim ref DCSF41X30X19, fixed to perimeter wall using fixings appropriate to the structure at maximum 450mm centres. Cut ends of main runner or cross tees will fit into the web of the channel to be held secure when fixing boards up to the grid.

Hangers: Shall be 25 x 25mm HDG steel angle section, ref DGA5, fixed to main runners using appropriate self drilling screws or nut and bolt fixings. Hangers shall be normally spaced at 1200mm centres although alternative spacings are acceptable provided maximum loadings stated above are not exceeded. Hangers to be fixed to structure or soffit using fixings appropriate to the structure or soffit.


NEW DONN DX Wall to Wall from USG is the fast and easy way to install flat plasterboard ceilings in corridors and small rooms.

Eliminates or minimises hanger wires and cross tees reducing material and labour costs.

Single span up to 1.8m supporting a typical single skin gypsum board. For spans greater than this up to 3.6m a single hanger centrally is usually sufficient.

Standard main runner lengths of 2.4m, 3.0m & 3.6m. Custom lengths can be manufactured on request.

Spans of 1.2m, 1.5m or 1.8m to be formed from full length main runners cut in two.

Cross tee holes at 100mm along length of main runner to allow installation of a DXSF60 cross tee for integration with services, forming of access hatches and additional stability of the system.

Standard DCSF41X30X19 perimeter channel supports and secures main runners at perimeters whilst allowing movement for adjustment of module.

Main runners can be secured to perimeter channel simply using a self drilling (TEK) screw.


• Fast and simple to install - up to 50% faster when compared to conventional gypsum ceiling suspension systems


• Hot dipped galvanised steel construction for corrosion resistance

• NOT SUITABLE for fire rated ceiling installations


DONN® DXWW Wall to Wall system

��

For easy installation of short span plasterboard ceilings

Specification DONN DXWW

Grid shall be DONN DXWW Screw Fix concealed grid system for fixing of gypsum and other boards spanning corridors or short distances up to a maximum of 3.6m. Hot dipped galvanised steel 'T' section with knurled hot dipped galvanised steel capping for easier screw attachment. Table width 40mm. To suit variable module sizes, most typically accomodating board sizes 1800 x 900mm and 2400 x 1200mm.

Perimeter trims: 41 x 30 x 19mm knurled hot dipped galvanised steel channel trim ref DCSF41X30X19, fixed to perimeter wall using fixings appropriate to the structure at maximum 450mm centres. Cut ends of main runner will fit into the web of the channel to be held secure when fixing boards up to the grid.

Main runners: 38 x 40mm, ref DXWW 240, 300 or 360 shall be normally spaced at 450mm or 600mm centres and span between perimeter channels up to a maximum span of 1.8m (see loading chart for specific details).

Where additional suspension is required (over 1.8m span), main runners are to be suspended from the structure or soffit using 25 x 25mm HDG steel angle section, ref. DGA5, fixed to main runners using appropriate self drilling screws or nut and bolt fixings. Typically, no more than one hanger should be required (see loading chart for specific details).

Hangers: Where required shall be 25 x 25mm HDG steel angle section, ref DGA5, fixed to main runners using appropriate self drilling screws or nut and bolt fixings. Hangers to be fixed to structure or soffit using fixings appropriate to the structure or soffit.

Cross tees: Not normally required with the wall to wall system. However, if forming a hatch, opening, framing for recessed light fittings or similar modular feature, 600mm cross tees, 38 x 40mm ref DXSF60, can be installed perpendicular between the main runners at either 450mm or 600mm centres dependent upon the feature being created. All cross tees feature a 'joggled' end detail.


Perimeter�Channel�DCSF41X30X19

Main�Runner�DXWW�240,�300�and�360

35 mm

28 mm

2400 mm, 3000 mm, 3600 mm

41 mm

19 mm

30 mm

3000 mm

40

40

40 mm 50 mm 100 mm 100 mm

38 mm

2400 mm, 3000 mm, 3600 mm

41 mm

19 mm

30 mm

3000 mm

Maximum allowed weight of board per m2 of ceiling

Module„�Support centres of

Main runner (mm)Main runner @ 450mm Main runner @ 600mm

1200 38 kg/m2 28 kg/m2

1500 19 kg/m2 15 kg/m2

1800 8 kg/m2 7 kg/m2

All above loads are based upon a maximum deflection of the main runner of L/300.


DONN® DXW

W W

all to Wall System

��

Component quantities for DONN DX Wall to Wall (per m2 ceiling)

Nr


Description Item reference Quantity Spacing Quantity Spacing

➊ Main Runner DXWW 240 2.23 lin m D - 450mm 1.66 lin m D - 600mm

DXWW 300 2.23 lin m D - 450mm 1.66 lin m D - 600mm

DXWW 360 2.23 lin m D - 450mm 1.66 lin m D - 600mm

➌ Perimeter Channel DCSF41X30X19 B - Spaced no greater than 3.6m apart

➍ Rigid Hanger DGA5 Centre span of main runner when req'd (over 1.8m span)

➊

➌

➍

DXWW main runner

accessdoor

off modulemain runner

off modulemain runner

DCSF41X30X19perimeter channel

450mm

450mm 600mm

600mm

450mm

450mm

450mm

DXSF60cross tee Cross tee connection

Off-module detail

1010

Accessory selector

The following information will help you select and use the appropriate accessories. Many of the accessories are multifunctional. Transitions from soffits, curved, or flat surfaces can be easier with the use of accessories.

DGTC-90 / Transition Clip

The Transition Clip securely joins two tier grid components, regardless of face width, at a 90° angle. Bend down tabs secure the clip to the grid. Screws are required to provide a structural connection.

The Transition Clip has a slotted bend line to facilitate connecting grid members that are not in line.

The primary purpose of the Splice Clip is to join two field cut to length in-line main tees, either straight or curved.

Another common use of the Splice Clip is joining two grid tees that are intersecting off module, such as a utility opening. The link joining the bend down tabs on the clip is cut allowing it to be folded on the slotted bend line.

DGC4 / DGC6 / DGC8 / Compässo Clips

Three Compässo Trim Clips are available for DXSF to match 100mm, 150mm, or 200mm Compässo trim. These clips are suitable for varying thicknesses of plasterboard - see USG Technical Department for details. The two portions of the clip are pivoted to accommodate Compässo Trim at any angle in relation to the grid.

DGTC-90Transition Clip

DGC4 Compässo Drywall Clip

DGSC-180Splice Clip

DGTC-90 / Transition Clip / Field Modified

DGSC-180 / Splice Clip DGSC-180 / Splice Clip

Accessory selector and Transition to acoustical ceiling

1111

Transition to acoustical ceiling

main tee

galvanised angle

rigid hanger

main tee

cross tees

acousticallay-in panel

cross tees

main tee

gypsum board

C

�

D

�B

�

A-�

Construction details

The new USG DONN DX Screw Fix suspension system is totally compatible with our Donn® DX® acoustical suspension systems, making it easy to transition between flat plasterboard and acoustical ceilings. Flush or offset transitions are possible. Additional cross tees are necessary at plasterboard edge to provide adequate support (as shown above).

main tee

main tee

cross tee

cross tee

splice clip

gypsum board

bead

C

�

main teecross teemain teeacousticalmain tee

acoustical ceiling

bead

ceiling

cross tee cross teeacousticalcross tee

gypsum boardacoustical panel

D

�

Plasterboard ceiling to acoustical transition - field cut connection

35mm15mm or 24mm grid

225mm 150mm

gypsum boardacoustical panel

cross tee

main tee main tee

C alt

�

bead

main tee

gypsum boardaccoustical panel

galvanised angle

D alt

�

Plasterboard to acoustical transition - factory end connection

Plasterboard to acoustical transition

Flush transition

1�

Soffits

cross tee

cross tees

gypsum board

rigid hanger

E

11

F

11

F

11

B

�

G

11

H

11

C-1

��%

Construction details

The USG DONN DX Screw Fix suspension system is the best choice for designing and building soffits. Soffits can now be built at a much lower cost than with metal stud construction.

Soffit suspension system componentsThe soffit suspension system components are identical to the components used in flat surface areas.

Soffit notes • In some instances, rigid hangers, bracing,

and grid components have been omitted or truncated for clarity. For additional information, please contact technical services.

• When constructing soffits, bracing of the plasterboard suspension and/or additional rigid hangers may be necessary to ensure stability and structural performance during and after plasterboard attachment.

• The maximum vertical soffit height is 1200mm with cross tees spaced 600mm on centre. Intermediate cross tees are not necessary when soffit dimensions do not exceed 600mm.

• When used in soffit construction,all Transition Clips are to have a minimum of 4 screws for attachment.

Boxed soffits

galvanised angle

tee

main tee

cross teegypsum board

H

11

galvanised angle

transition clip (DGTC-90)

main tee or cross tee


gypsum board

E

11

galvanised angle


gypsum board

E alt

11

transition clip

main tee

galvanised angle

tee

gypsum board

G

11

bend transition clip (DGTC-90)

transition clip (DGTC- 90)

teegalvanised angle

gypsum board

main tee

F

11

�0˚ inside corner �0˚ outside corner with main tee at bottom edge

�0˚ outside corner using Transition Clip (DGTC-�0) �0˚ outside corner with field cut tee

�0˚ inside corner with galvanised angle at top edge

Soffits

1�

1�

?Frequently asked questions

1. What makes the DXSF system so fast to install compared with traditional furring systems?

The system is based around the DONN DX exposed grid system which is acknowledged worldwide as the fastest installing grid available due to the DX clip. DXSF systems have all holes pre punched to take cross tees, therefore all setting out of components is measured and controlled by the holes. Once initial set out is established, everything else is automatic. In addition, the cross tees connect by a simple push fit action so there are no wires or clips needed to connect main runners and cross tees. This makes installation and progress significantly faster, with whole ceiling areas being gridded out without interruption, prior to fitting of boards.

2. Can DXSF systems be used in fire protecting ceiling constructions?

Yes. Whilst we cannot cover every possible circumstance with DXSF systems, testing has been carried out at Warrington Fire Research in conjunction with various boards to provide 1 hour structural fire protection in accordance with BS 476: pt 23. Please consult USG Technical Services for full details of these tests.

3. How can DXSF systems accom-modate the size variation and tolerance of boards?

Gypsum boards can be supplied up to 6mm under the specified length. DXSF grid is manufactured to much tighter tolerances, therefore there is potential for a mismatch at some point. In the worst case, with boards on bottom tolerance and assuming an 1800mm long board, there would be a problem fixing the end of the board into the tee after three lengths of boards are installed, or every 5.4m. The simple solution to this is to cut the board back to the centre line of the previous cross tee and use this as a new datum line. There will be very little extra material wastage and the time taken to cut the board is much less than having to readjust furring channels to accommodate the intolerance of board sizes, meaning installation time is still reduced. Of course where the boards are not up to the maximum tolerance, this equation is reduced accordingly. For example, if the boards were supplied 3mm under size, this action would be required only after every six board lengths, or every 10.8m.

4. Do boards need to be installed to line through with cross tees and main runners?

No. Try to think of the DXSF grid as having the benefits of an exposed grid in respect of installation speed with the benefits of a metal furring system in respect of versatility. Board fixings should be as recommended by the board supplier and are the same for the DXSF system as they would be for a metal furring system. Typically, an 1800 x 900mm board has lines of fixings along its length at 450mm centres. The DXSF system allows cross tees to be installed at 450mm centres to take these fixings. All fixings are into the cross tees; there is no need to fix into the main tees, therefore board edges do not need to line up along the DXSF main runners. Likewise a 2400 x 1200mm board is installed typically with lines of fixings at 600mm along length. The DXSF system can also allow for cross tees at 600mm centres thus satisfying this. Again the board edges do not need to line up with the main runners. However, if this is a requirement for some reason by the board supplier, this can obviously be accommodated with this grid layout.

5. Can DXSF systems be used to create plasterboard borders with exposed grid ceilings?

Yes. As the DXSF system is based around the use of the DX clip, all clips and cross tee holes are identical to our DONN DX24 and DX15 exposed grid systems. This therefore makes the creation of plasterboard borders very easy indeed with the DXSF grid simply splicing to the DX24 or DX15 grid automatically. Details of these junctions are covered on page 11 of this brochure.

6. Can DXSF systems accommodate a change in direction (for example the turn of a corridor or an L shaped room)

Yes. Using the accessories available with the system (DGSC-180) it is very simple to splice a tee at 90°, or indeed any angle, to allow changes in direction of the main runners. Details of this are covered on page 10 of this brochure.

7. What is the maximum recommended spanning distance from a main tee to the wall channels when setting out?

The first main runner parallel to the wall should be no more than 600mm from the wall. The first hanger on the main runner should be no more than 450mm from the perimeter.

8. Is there a benefit in cost or time using 1800 x 900mm boards over 2400 x1200mm plasterboards?

The size of board to be used may be dependent upon a number of factors, none of which are dictated by the DXSF systems. DXSF systems can accommodate both board sizes equally well and the installation of the DXSF system is effectively the same either way. If a particular board recommends fixings to be at 600mm centres rather than 450mm centres, this would result in DXSF cross tees being installed at 600mm centres, thus resulting in a saving in terms of material and cost.

9. Can DXSF systems be installed vertically? Is there a maximum vertical elevation recommended?

Yes. Using the accessories available with the system (DGTC-90) a vertical junction can be created. This is designed to create and construct bulkhead details quickly and with the minimum of fuss. Details of this are covered on pages 12 and 13 of this brochure. It should be noted however that DXSF systems are intended to be used as a ceiling system and should not be used as a wall lining, therefore the maximum vertical elevation should be limited. This will vary depending upon individual circumstances. Please contact USG Technical Services to discuss.

10. Can DXSF systems be used in an external application, i.e. under canopies?

No. Whilst DXSF systems are manufactured from Hot Dipped Galvanised steel, they are designed to be used in internal applications only.

11. What is the maximum board weight that can be carried by DXSF systems? Can DXSF systems take 2 layers of board?

The maximum load bearing capability of DXSF systems is dictated by the installation configuration but uniformly distributed loads of up to 39.7 kg/m² can be carried by DXSF systems. More information on this is contained in the specific system pages of this brochure. Please contact USG Technical Services to discuss high loading applications.

12. Can DXSF systems be suspended on wire hangers?

The recommended method of suspension for DXSF systems is to use a rigid HDG angle section. This is primarily to provide vertical resistance when screw fixing boards up to the grid. Wire hangers would not provide the vertical resistance required to fix the boards and are therefore not recommended.

1�

Frequently asked questions

?13. Can DXSF systems incorporate

lighting?Yes. Modular recessed lights can be easily supported on the bulb of the DXSF tees. Using the accessories available with the system (DGSC-180) it is very simple to splice a tee at 90° to provide a framework for the light fitting.

14. Can DXSF systems be adjusted once installed?

One of the advantages of DXSF systems is the use of the DONN DX clip which allows the cross tees to be demounted and removed from the installation without the need for cutting or specialist tools. If the installation needs to be adjusted for any reason then this feature allows demountability and reconnection as required.

15. What warranty is offered on ceilings incorporating DXSF systems?

USG is only able to offer a warranty on the materials and products manufactured and supplied by USG, therefore a system warranty including the board and finish is not possible. USG will offer a limited product warranty of up to 10 years on the DXSF system, however, which will be based upon the circumstances of the individual project. Please contact USG customer services to discuss.

16. Why should we use DXSF systems instead of traditional Metal Furring?

USG believes that the use of DONN DXSF systems can greatly reduce installation time over traditional systems in many different project applications. DONN DXSF systems offer these advantages of speed and simplicity in particular on projects where smaller rooms, corridors and short spans are prominent, i.e. Apartments, Housing, Student Accommodation, Schools, Hospitals and many more. The DONN DX clip allows fast and accurate installation without the labour intensive practice of connecting furring sections to channels and with fewer components required to complete an installation. No other system offers the flexibility to create bulkheads, upstands and transitions from plasterboard to acoustical ceilings quickly, easily and with standard components.

ISSUE 3, July 2008

16 www.usg.com/europe

United Kingdom, IrelandUSG (UK) Ltd.1 Swan RoadSouth West Industrial EstatePeterleeCo. Durham SR8 2HSUnited KingdomTel: +44 (0)191 586 1121Fax: +44 (0)191 586 0097e-mail: [email protected]

Deutschland, Österreich, SchweizUSG Deutschland GmbHMetallstrasse 1D-41751 ViersenDeutschlandTel: +49 (0)2162 9570Fax: +49 (0)2162 4461e-mail: [email protected]

España, Portugal, MarruecosUSG Interiors España S.L.C/José Lázaro Galdiano, 428 036 MadridEspañaTel: +34 (91) 457 00 50Fax: +34 (91) 457 10 16e-mail: [email protected]

France, Belgique, LuxembourgUSG France S.A.Z.I. Nord - BP 2879 Rue des Livraindières28109 Dreux CedexFranceTel: +33 2 37 38 50 50Fax: +33 2 37 42 10 73e-mail: [email protected]

ItaliaUSG Italia SRLVia Avv. Ambrosoli, 10/A20090 Rodano-loc. Millepini (MI)ItaliaTel: +39 02 95 32 85 87Fax: +39 02 95 32 86 37e-mail: [email protected]

Russia, Ukraine, Byelorussia, Kazakhstan & CIS countries USG Building Systems RUSul. Salova 45 F192 102 St. PetersburgRussiaTel: +7 812 347 79 26Fax: +7 812 347 79 27e-mail: [email protected]

Sverige, Norge, Danmark, Finland, IslandUSG ScandinaviaAnkdammsgatan 28S-171 43 SolnaSwedenTel: +46 (0)8 444 38 30Fax: +46 (0)8 626 94 51e-mail: [email protected]

Middle EastUSG Middle East Ltd.PO Box 2897Dammam 31461Saudi ArabiaTel: +966 3 812 0995/1075Fax: +966 3 812 1029

USG International Inc550 West Adams StreetChicago, Illinois 60661-3676USATel: +1 312 436 4000Fax: +1 312 672 7726

USG reserves the right to change specifications or design and supply products which may differ from those described and illustrated without notice and without liability. All weights and measures are nominal.

DONN® DX® is a trademark of USG Interiors Inc. or affiliated companies.

DC/02B/UK/08/08

© 2008

u

Documents

Usg Donn Dwall-16