CEILING CONCEALED GRID-ACOUSTIC CEILING
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GYPTONE/RIGITONE
Gyproc Gyptone/Rigitone is a range of characteristically styled ceiling boards with high levels of acoustic
absorption and impact resistance. Gyptone Rigitone boards are characterised by circular perforations and
Gyproc Gyptone are characterised by rectangular or square perforations.
NRC from 0.55 to 0.90
KEY FACTS
• Perforated appearance
• Services accommodated in the plenum
• Durable ceiling lining
• Suspension from concrete soffits,
timber trusses and purlins
• Acoustic properties
APPLICATIONS
Concealed grid acoustic ceiling where superior aesthetics and sound absorption are required
SECTOR
Commercial, educational, entertainment
CEILING CONCEALED GRID-ACOUSTIC CEILING
GYPTONE ACOUSTIC CEILING
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SPECIFICATION
1 layer Gyproc Gyptone (Big Line 6/Big Quattro
41/Bend Line 7) fixed to Donn ceiling grid. Fix
Gyptone boards using Gyproc RhinoBoard Sharp
Point Screws 25mm at maximum 150mm centres.
Apply RhinoTape to all joints. Jointed finish and
covering of the screw heads is done using Gyproc
RhinoGlide. Ceiling grid consisting of Donn QRC
T37K Main Tees at 1200mm centres and Donn QRC
T32K Cross Tees at (300mm/600mm) centres.
Donn QRC T37K Main Tees suspended using Donn
Galvanised Steel Angle 25mm x 25mm at 1200mm
centres. Fix galvanised steel angles to Donn QRC
T37K Main Tees using Gyproc Wafer Head Tek
Screws 13mm.
Install specified Isover insulation where required.
GYPTONE RIGITONE ACOUSTIC CEILING
SPECIFICATION
1 layer Gyptone Rigitone (12-20/66/8-15-20 Super)
fixed to Donn ceiling grid. Fix Rigitone boards
using Gyproc RhinoBoard Sharp Point Screws 25mm
at maximum 150mm centres. Finish the joints and
spot the screw heads using Rigitone Vario Joint
Filler. Ceiling grid consisting of Donn QRC T37K
Main Tees at 1200mm centres and Donn QRC T32K
Cross Tees at 300mm centres. Where required,
install additional cross tees. Donn QRC T37K Main
Tees suspended using Donn Galvanised Steel
Angle 25mm x 25mm at 1200mm centres. Fix galvanised steel angles to Donn QRC T37K Main Tees
using Gyproc Wafer Head Tek Screws 13mm.
Install specified Isover insulation where required.
CEILING CONCEALED GRID-ACOUSTIC CEILING
Ceiling Lining
Thickness of
board
(mm)
Board size
(mm)
Percentage
Perforation
1
Gyptone Bend
Line 7
6.5
2400 x 900
1
Gyptone BIG
Quattro 41
12.5
1
Gyptone BIG
Line 6
2
2
Finish
Acoustic
performance2
NRC
T32K
Cross Tee
Spacing1
(mm)
14%
Jointed
0.55-0.65
300
1200 x 2400
16%
Jointed
0.6-0.75
600
12.5
1200 x 2400
13%
Jointed
0.55-0.65
600
Gyptone/
Rigitone
12-20/66
12.5
1188 x 19803
20.2%
Joint Filler
technique
0.65-0.90
300
Gyptone/
Rigitone
8-15-20 Super
12.5
1200 x 19693
10%
Joint Filler
technique
0.60-0.70
300
Based on limiting deflection of L/360.
Performance depends on the plenum depth and installation of acoustic insulation. See sound absorption data.
For all joints to be on the ceiling framework, additional cross tees are required.
1
2
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Relative
Humidity
70%
CEILING CONCEALED GRID-ACOUSTIC CEILING
SOUND ABSORPTION DATA
GYPTONE BEND LINE 7
GYPTONE BIG LINE 6
GYPTONE BIG QUATTRO 41
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means Rigitone can be used in extreme environments from indoor gyms to cinema
boards are installed on the Donn screw
up ceiling grid and are assembled in
20
providing a homogeneous and aesthetically satisfying look and feel.
66
12
Rigitone
66
20
Rigitone 8-15
12-20
/ 66
8
15
PRODUCT CODE 10851
PRODUCT CODE 10852
CEILING
CONCEALED
GRID-ACOUSTIC
SIZE OF BOARD:
1188 1980
SIZE OF BOARD: CEILING
1200 1960
M2/ BOARD = 2.35
x
mm
M2/ BOARD = 2.35
x
CEILINGS | 27
mm
Rigitone is a range of characteristically styled ceiling
boards, currently available in
66
patterns. Both of these boards offer high levels of acoustic absorption and hig
means Rigitone can be used in extreme environments from indoor gyms to cinem
boards are installed on the
Donn
screw
up ceiling grid and are assembled in
66
12
20
providing a homogeneous and aesthetically satisfying look and feel.
PRODUCT CODE 10851
PRODUCT CODE 108
SIZE OF BOARD: 1188 x 1980mm
SIZE OF BOARD: 12
M2/ BOARD = 2.35
M2/ BOARD = 2.35
GYPTONE RIGITONE 12-20/66
Rigitone
Rigitone 8-1
12-20 / 66
66
ally styled ceiling boards, currently available in 2 distinguished perforation
er high levels of acoustic absorption and high impact resistance, which
eme environments from indoor gyms to cinemas and restaurants. Rigitone
screw up ceiling grid and are assembled in a jointless ceiling system,
sthetically satisfying look and feel.
12
66
20
PRODUCT CODE 10851
SIZE OF BOARD: 1188 x 1980mm
M2/ BOARD = 2.35
PRODUCT CODE 1
SIZE OF BOARD: 1
M2/ BOARD = 2.3
Rigitone 8-15-20
is a rangeSUPER
of characteristically styled ceiling boards, currently available in 2 distinguished perforation
Rigitone
patterns. Both of these boards offer high levels of acoustic absorption and high impact resistance, which
means Rigitone can be used in extreme environments from indoor gyms to cinemas and restaurants. Rigitone
boards are installed on the Donn screw up ceiling grid and are assembled in a jointless ceiling system,
providing a homogeneous and aesthetically satisfying look and feel.
Rigitone
66
20
Rigitone 8-15-20 SUPER
12-20 / 66
8
6
15
PRODUCT CODE 10852
SIZE OF BOARD: 1200 x 1960mm
M2/ BOARD = 2.35
20
66
Rigitone is a range of characteristically styled ceiling boards, currently available in 2 distinguished perforation
8
15
patterns. Both of these
high
levels66of acoustic absorption and high impact resistance,
which
12
20
EWboards offer
Nbe
means Rigitone can
used
in
extreme
environments
from
indoor
gyms
to
cinemas
and
restaurants.
Rigitone
PRODUCT CODE 10851
PRODUCT CODE 10852
boards are installed
the Donn
screw
up ceiling grid and are assembled
in a jointless
SIZEon
OF BOARD:
1188
x 1980mm
SIZE OF BOARD:
1200 x ceiling
1960mm system,
providing a homogeneous
and
aesthetically
satisfying
look
and
feel.
M2/
BOARD
=
2.35
M2/
BOARD
=
2.35
GYPTONE RIGITONE 8-15-20 SUPER
Rigitone acoustic ceilings
Rigitone
Rigitone 8-15-20 SUPER
12-20 / 66
20
66
12
20
PRODUCT CODE 10851
SIZE OF BOARD: 1188 x 1980mm
M2/ BOARD = 2.35
66
8
15
PRODUCT CODE 10852
SIZE OF BOARD: 1200 x 1960mm
M2/ BOARD = 2.35
Indoor sports areas
Rigitone 8-15-20 SUPER is suitabl e
for use in extreme environments such
as indoor sports areas .
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GYPTONE TOP VIEW
7
6
4
5
1
2
3
GYPTONE BOTTOM VIEW
6
4
2
1
3
5
KEY
1. Gyptone board
5. Jointed finish
3.Donn QRC T32K Cross Tees
7. Acoustic liner
2.Donn QRC T37K Main Tees at 1200mm centres
4.Donn Plaster Trim 9.5mm - where applicable
6.Donn Galvanised Steel Angle 25mm x 25mm
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GYPTONE RIGITONE TOP VIEW
6
4
7
5
1
2
3
GYPTONE RIGITONE BOTTOM VIEW
6
4
2
1
3
5
KEY
1. Gyptone Rigitone board
5.Rigitone Vario Joint Filler
3.Donn QRC T32K Cross tees at 300mm centres
7.Acoustic liner
2.Donn QRC T37K Main tees at 1200mm centres
4.Donn Plaster Trim 9.5mm
6.Donn Galvanised Steel Angle 25mm x 25mm
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CEILING CONCEALED GRID CEILING
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DESIGN GUIDELINES FOR CONCEALED GRID CEILING
FIRE AND SMOKE BAFFLES
Where fire/smoke baffles are required, these can be created using Gyproc Firestop fixed to a simple metal or
timber frame. The framework should be fixed to the building structure to avoid undue loading of the ceiling
suspension grid or, alternatively, additional hangers should be incorporated to support the ceiling alongside
the fire/smoke baffle.
RELATIVE HUMIDITY
GypCeil ceilings lined with Gyproc RhinoBoard or Gyptone ceilings are suitable for use under normal
occupancy conditions. Buildings in which these linings are used should be dry, glazed and enclosed, with
environmental conditions of not greater than 70% RH at 10°C to 21°C. For high humidity or high moisture
conditions, Gyproc MoistureResistant shall be used.
VAPOUR CONTROL
Two coats of Gyproc Gypseal applied to the face of the ceiling will provide water vapour control.
ACOUSTIC PERFORMANCE
Gyptone and Rigitone boards are perforated and designed to provide sound absorption when used in
conjunction with an air space behind the ceiling. Increased levels of sound absorption can be achieved by
installing specified Isover Glasswool insulation onto the ceiling.
Where room-to-room sound insulation is required, sound attenuation (Dncw) can be improved by the
installation of specified Isover Glasswool insulation onto the ceiling. Alternatively, other design considerations
should be adopted such as extending adjoining partitions into the plenum void or installing a plenum barrier.
THERMAL PERFORMANCE
Isover Glasswool insulation can be laid over the ceiling to provide the required standard of thermal insulation.
Insulation shall be laid securely with closely butted joints, leaving no gaps. Contact Saint-Gobain Technical and
Specification for further guidance.
CEILING LIFT
Airtightness requirements within dwellings, can lead to greater changes in air pressure when a door is opened.
The ceiling is normally the lightest fixed element in the room, and therefore most likely to be affected by
this change in pressure. This can cause the ceiling to lift, which may create a noise. Whilst this noise can be
annoying to the occupier, it has no detrimental effect on the performance of the ceiling. The designer should
consider incorporating a pressure release system to minimize the risk of ceiling lift. Where sufficient pressure
relief cannot be incorporated, it is recommended that a rigid hanger is used e.g. Donn Galvanized Steel Angle
25mm x 25mm.
CEILING FRAMEWORK
Fixing points for suspending the metal grid are required at 1200mm centres. Suitable fixing devices should be
used when fixing to the structure.
The ceiling grid (screw-up grid) must be suspended from a concrete soffit using Donn Galvanized Steel Angles
25mm x 25mm. This provides a more robust suspension support, which restricts any flexing of the lining when
pressure is applied from below. Donn Galvanized Steel Angle 25mm x 25mm is thus the preferred suspension
option when a plaster finish is specified to Gyproc RhinoBoard. If Donn Galvanized Steel Angle 25mm x 25mm
is used, it is recommended that it’s fixed to the soffit via Donn Angle Cleats.
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Donn Suspension Brackets (for steel brandering) or Donn Galvanized Steel Angle 25mm x 25mm (for screwup grid) shall be used to suspend the grid from timber joists/trusses. Donn Suspension brackets and Donn
Galvanized Steel Angle 25mm x 25mm are fixed to the timber joists/trusses using Gyproc RhinoBoard Sharp
Point Screws 35mm. Maximum joist/tie beam spacing shall be 1200mm centres.
Timber brandering can be fixed directly onto the joists/trusses. The size of timber brandering used will depend
on the joists/truss spacing.
Joist/Truss spacing
Brander size
<1000mm
38mm x 38mm
1001 - 1200mm
38mm x 50mm (with 50mm dimension vertically)
1201 - 1400mm
50mm x 75mm (with 75mm dimension vertically)
>1401
Consult a structural engineer
SUSPENSION - GYPTONE RIGITONE BOARD LININGS
T37K Main Tees are installed at maximum 1200mm centres. The main tees shall be suspended using Gyproc
RhinoBoard Sharp Point Screws 35mm at 1200mm centres along the length of the main tee. In addition to this,
the T32K Cross Tees should be installed at 300mm centres. Additional cross tees should be fixed to the main
tees using Donn Angle Cleats.
DRYWALL TO CEILING JUNCTION
In situations where a GypWall drywall passes through a GypCeil ceiling which is on both sides of the drywall
and the ceiling is appropriately fixed to this drywall and perimeter drywalls/walls, consideration can be
given to the lateral restraint provided by the ceiling when developing the partition specification. The relevant
maximum height is the greater of the floor to GypCeil ceiling or ceiling to structural soffit height. Care should
be taken during installation of high drywalls so as to not adversely affect their performance. Contact the
Saint-Gobain Technical and Specification for further guidance.
Where a GypWall drywall is fixed to the framework of a GypCeil ceiling, in accordance with Saint-Gobain
Gyproc installation instructions, the permissible maximum height is equal to the floor to ceiling height.
CEILING LINING
Tightly butt boards together. The boards shall be installed with the longer side running perpendicular to the
direction of brandering or cross tees. The boards shall be installed with the shorter side joints staggered by at
least 300mm and centered on ceiling framework. Where required install additional framing. For a two layer
lining, stagger joints between layers by at least 600mm.
For single layer lining onto a steel framework, fix boards securely using Gyproc RhinoBoard Sharp Point Screws
35mm screws at maximum 150mm centres.
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For double layer lining onto a steel framework: fix first layer using Gyproc RhinoBoard Sharp Point Screws
42mm at maximum 150mm centres and fix second layer with Gyproc RhinoBoard Sharp Point Screws 25mm
at maximum 150mm centres.
For single layer lining onto a timber framework: Fix boards securely using Gyproc RhinoBoard Sharp Point
Screws 35mm or galvanised clout nails at maximum 150mm centres. For plastered ceilings only Gyproc
RhinoBoard Sharp Point Screws 35mm must be used. Do not use semi-clout nails.
Position fixings not less than 13mm from cut edges and 10mm from bound edges of boards. Set heads in a
depression; do not break paper or gypsum core.
SERVICES
The plenum can be used to route all service requirements including ducting, pipework, electrical cables and
conduits. Where light fittings, access panels and similar components are incorporated as part of the design
requirements, consideration must be given to maintaining the integrity of the ceiling to meet fire resistance
and sound insulation requirements.
FIXTURES
Fixings to the system should always be made into the ceiling grid or to supplementary framing.
Where heavy loads are anticipated, an independent suspension should be provided from the structure.
CONTROL JOINTS
Gyproc Control Joints may be required in certain ceilings to relieve stresses induced by expansion and
contraction of the structure. Control joints are visible and may impinge on the aesthetics of the building.
Consequently the position of the control joints should be determined by the architect/designer. Control joints
shall be specified where any of the conditions listed below exist:
•
•
•
•
•
•
Where excessive movement is likely to occur.
Where a ceiling traverses movement joints within the surrounding structure. The width of the drywall
control joint shall be equal to that of structure.
Where the building/substrate structural system/material changes.
Interior ceilings with perimeter relief: Control joints shall be installed so that linear dimensions between control joints shall not exceed 15m and total area between control joints does not exceed 225m.
Exterior ceilings and soffit: Control joints shall be installed so that linear dimensions between control joints shall not exceed 9m and total area between control joints does not exceed 81m.
A control joint is desired or incorporated as a design accent or architectural feature.
GYPTONE RIGITONE EXPANSION JOINTS
Gyptone Rigitone boards should be cut 10mm short of the perimeter walls and should not be fixed to the
perimeter channel.
GYPTONE RIGITONE FINISH
Additional care and attention should be taken when jointing Gyptone Rigitone boards so as not to fill the
perforations and impair the acoustic performance of the finished ceiling.
BOARD FINISHES
For a jointed finish, Gyproc RhinoGlide shall be applied 300mm wide on the tapered side of the board and
600mm wide on the butt jointed sides.
For a skimmed finish, apply Gyproc RhinoLite to a minimum thickness of 3mm.
Do not apply epoxy paints onto surfaces with gypsum plasters.
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