CasoLine MF Concealed grid MF suspended ceiling system

Transcription

1 Concealed grid MF suspended ceiling system! This section includes updated information, added since it was first published in July 009. Please see the WHITE BOOK update document for details. Last updated 0/09/0 0 Joseph Chamberlain College, Birmingham

2 α w Sound absorption is a suspended ceiling system suitable for most internal drylining applications. The fully concealed grid and ceiling lining can be used in conjunction with Gyproc plasterboards and Gyptone and Rigitone boards to create a seamless, monolithic appearance. R w db Airborne L nw db Impact l l l mins Key facts Monolithic appearance Suspension from concrete or timber floors and purlins Acoustic hangers provide option of resilient suspension GypWall RAPID and RAPID CasoLine db Plus MF A l Durable ceiling lining l Ventilation ducts and other services accommodated in plenum l Simple accommodation of access panels l Easy to create bulkheads and level change l Easily integrated with CasoLine GRID A Gypframe MF7 Primary Support Channel Gypframe MF Perimeter + Support Channel Gyproc Wafer Head Jack- Point Screws + + Gypframe MF Ceiling Section l Fully integrated access hatches Applications A wide range of residential and commercial applications. Sector Education High-rise multi-occupancy Healthcare Apartment buildings 0

3 L SPECSURE System components Gypframe metal products MF Ceiling Section Secondary section below Gypframe MF7 Primary Support Channel. MF Perimeter Channel Perimeter support for Gypframe MF Ceiling Section. MF7 Primary Support Channel Primary support section. MF Strap Hanger Suspension of ceiling grid. or GA Steel Angle Length 00mm Length 00mm Length 00mm Length m (coil) Length 900mm Fixing and finishing products Gyproc Profilex Access Panels For access to the plenum for maintenance purposes. Gyptone Access Panels To integrate with the Gyptone range of ceiling boards - LINE, QUATTRO, and 7. Gyproc Wafer Head Drywall Screws For Gypframe metal-to-metal fixing less than 0.mm thick ( I studs less than 0.mm thick). Gyproc Wafer Head Jack-Point Screws For fixing hanger to Gypframe MF7 Primary Support Channel, and for fixing Gypframe MF Ceiling Section to Gypframe MF7 Primary Support Channel. Gyproc Drywall Screws For fixing boards to Gypframe metal framing less than 0.mm thick ( I studs less than 0.mm thick). Gyproc Sealant Sealing air paths for optimum sound insulation. GAH Acoustic Hanger GAH Acoustic Hanger (supplied with washers). Length mm Length 70mm Gyproc jointing materials For seamless jointing. MF9 Connecting Clip Alternative method for fixing Gypframe MF Ceiling Section to Gypframe MF7 Primary Support Channel. MF Nut and Bolt Joining hanger to soffit cleat. MF Soffit Cleat Suspension point from structural soffit. Board products Gyproc WallBoard Thickness., mm Width 900mm Gyproc SoundBloc Thickness., mm Width 00mm Gyproc FireLine Thickness., mm Width 900mm Glasroc F MULTIBOARD Thickness, 0,.mm Width 00mm Glasroc F FIRECASE Thickness mm Width 00, 00mm Also available in DUPLEX grades where vapour control is required. Rigitone installation tools For installation and finishing of Rigitone boards. Rigitone Vario 0 For jointing of Rigitone boards. Thistle GypPrime For controlling suction on Rigitone board edges. Thistle Multi-Finish or Thistle Board Finish To provide a plaster skim finish. or Thistle Spray Finish Gypsum finish plaster for spray or hand application. Insulation products Isover APR 00 mm and 0mm, for improved acoustic and thermal performance. Isover Spacesaver Ready-Cut 00mm, for improved acoustic and thermal performance. Isover Frame Batt 0mm, for improved acoustic, thermal and fire performance. Isover Sound Deadening Floor Slab For providing sound deadening in timber-based intermediate separating floors. Stone mineral wool (by others) To achieve fire performance. T E F I I M E S Y S T E M W A R R A N T Y Always use genuine branded British Gypsum components to qualify for SpecSure lifetime warranty 0

4 L SPECSURE T F 0 E bgtechnical.enquiries@bpb.com System components (continued) Gyptone board products Gyptone QUATTRO Thickness.mm Gyptone QUATTRO Thickness.mm Length 00mm Length 00mm Width 00mm Width 900mm Rigitone board products Rigitone / Thickness.mm Length 99mm Width mm Rigitone 0/ Thickness.mm Length 00mm Width 9mm Gyptone QUATTRO Thickness.mm Length 00mm Width 00mm Gyptone QUATTRO 7 Thickness.mm Length 00mm Width 00mm Rigitone /0 Thickness.mm Length 00mm Width 00mm Rigitone -0/ Thickness.mm Length 90mm Width mm Gyptone LINE Thickness.mm Length 00mm Width 00mm Gyptone LINE 7 Curve Thickness.mm Length 00mm Width 900mm Rigitone --0 Thickness.mm Length 000mm Width 00mm Rigitone --0 SUPER Thickness.mm Length 90mm Width 00mm Gyptone BASE Curve Thickness.mm Length 00mm Width 900mm T E F I I M E S Y S T E M W A R R A N T Y Always use genuine branded British Gypsum components to qualify for SpecSure lifetime warranty 0

5 Installation overview Suspension from concrete soffit Gypframe MF Perimeter Channel is fixed to the wall at maximum 00mm centres, and Gypframe MF Soffit Cleats secured to the soffit at 00mm centres, using appropriate fixings. Gypframe MF Strap Hanger or Gypframe GA Steel Angles are pre-cut and secured to the soffit cleats with Gypframe MF Nut and Bolt. Gypframe MF7 Primary Support Channels are installed over the Gypframe MF Perimeter Channels. Fix hangers (two per fixing) to Gypframe MF7 Primary Support Channel using Gyproc Wafer Head Jack-Point Screws. Gypframe MF Ceiling Sections are run at right angles to the underside of primary channels to form the secondary grid. The ceiling sections are secured to the primary channels by using two Gyproc Wafer Head Jack-Point Screws. Alternatively, the Gypframe MF Ceiling Sections can be secured to the Gypframe MF7 Primary Support Channels using Gypframe MF9 Connecting Clips. Please refer to Ceiling lift in the Design section. Boards are fixed to the secondary grid to form single or multi-layer linings as specified. Suspension from timber joists The procedure is as for concrete except that soffit cleats are not required hangers are twice fixed directly to the side of the joists. Board fixings Board fixings for Gyproc and British Gypsum specialist boards should be at 0mm centres at board-ends, and at 0mm centres within the field of the board. Board fixings for Gyptone boards should be at 0mm centres across board-ends and through the field of the board. Board fixings for Rigitone boards should be at 0mm centres at perimeters and 0mm through the field of the board. A special procedure is used for fixing and jointing Rigitone boards. Detailed installation notes are given in the current British Gypsum Ceilings Installation Guide, available to download from For full installation details, refer to the British Gypsum SITE BOOK, available to download from For full installation details, refer to the British Gypsum SITE BOOK, available to download from 0

6 T F 0 E bgtechnical.enquiries@bpb.com Performance ( Fire resistance EN Refer to section - Basic principles of system design) Table fire protection to timber floor construction Solutions to satisfy the requirements of BS EN -: 000 L I F E T I M E SPECSURE S Y S T E M W A R R A N T Y Floor boarding of mm minimum t&g softwood or wood particle floor boarding. Solid timber joists x 9mm at 00mm centres. suspended ceiling fixed to joists. Ceiling linings as in table. Floor boarding of mm minimum t&g softwood or wood particle floor boarding. Solid timber joists x 9mm at 00mm centres. suspended ceiling fixed to joists. Ceiling linings as in table. Detail Board Ceiling MF MF7 System type lining support support reference thickness centres centres mm mm mm 0 minutes fire resistance EN FireLine x C minutes fire resistance EN Glasroc F MULTIBOARD x G00 EN Table fire protection to floor or roof cavity above suspended ceiling Solutions to satisfy the requirements of BS EN -: 999 L I F E T I M E SPECSURE S Y S T E M W A R R A N T Y suspended ceiling fixed to structure. mm stone mineral wool slabs (00kg/m ) laid over Gypframe MF Ceiling Section. Ceiling linings as in table. Detail Board Ceiling MF MF7 System type lining support support reference thickness centres centres mm mm mm 0 minutes fire resistance EN FireLine x C00 0 minutes fire resistance EN Glasroc F FIRECASE x 0 00 G000 The requirement for providing cavity barriers in the same plane as fire-resistant walls may not apply to cavities in floors and roofs if the ceiling beneath the floor or roof cavity provides a minimum of a full 0 minutes fire resistance (0 mins. integrity : 0 mins. insulation) in addition to satisfying other requirements. Refer to section 0 Cavity fire barriers. NB The fire resistance and sound insulation performances are for imperforate partitions, walls and ceilings incorporating boards with all joints taped and filled, or skimmed according to British Gypsum s recommendations. The quoted performances are achieved only if British Gypsum components are used throughout, and the Company s fixing recommendations are strictly observed. Any variation in the specifications should be checked with British Gypsum. NBS work section K0 - Plasterboard drylinings / partitions / ceilings 07

7 Performance ( BS Refer to section - Basic principles of system design) Table fire protection to timber floor construction Solutions to satisfy the requirements of BS 7: Part : 97 L I F E T I M E SPECSURE S Y S T E M W A R R A N T Y Floor boarding of mm minimum t&g softwood or wood particle floor boarding. Solid timber joists. x 9mm at 00mm centres. suspended ceiling fixed to joists. Ceiling linings as in table. Floor boarding of mm minimum t&g softwood or wood particle floor boarding. Solid timber joists x 9mm at 00mm centres. suspended ceiling fixed to joists. Ceiling linings as in table. Floor boarding of mm minimum t&g softwood or wood particle floor boarding. Solid timber joists x 9mm at 00mm centres. suspended ceiling fixed to joists. Ceiling linings as in table. Detail Board Ceiling Approx. MF MF7 System type lining weight support support reference thickness centres centres mm kg/m mm mm 0 minutes fire resistance BS FireLine x C000 WallBoard x C000 0 minutes fire resistance BS FireLine x C minutes fire resistance BS FireLine x C000 0 minutes fire resistance BS Glasroc F MULTIBOARD x G00 BS Table fire protection to floor or roof cavity above suspended ceiling Solutions to satisfy the requirements of BS 7: Part : 97 L I F E T I M E SPECSURE S Y S T E M W A R R A N T Y suspended ceiling fixed to structure. Normal fixing centres for Gypframe MFs and MF7s (0mm and 00mm respectively). Insulation laid over Gypframe MF Ceiling Section. 00mm Isover General Purpose Roll laid over Gypframe MF Ceiling Section. Ceiling linings as in table. suspended ceiling fixed to structure. Normal fixing centres for Gypframe MFs and MF7s (0mm and 00mm respectively). 0mm stone mineral wool slab kg/m laid over Gypframe MF Ceiling Section. Ceiling linings as in table. Detail Board Ceiling MF MF7 System type lining support support reference thickness centres centres mm mm mm 0 minutes fire resistance BS WallBoard x C00 0 minutes fire resistance BS FireLine x 0 00 C00 The requirement for providing cavity barriers in the same plane as fire-resistant walls may not apply to cavities in floors and roofs if the ceiling beneath the floor or roof cavity provides a minimum of a full 0 minutes fire resistance (0 mins. integrity : 0 mins. insulation) in addition to satisfying other requirements. Refer to section 0 Cavity fire barriers. NB The fire resistance and sound insulation performances are for imperforate partitions, walls and ceilings incorporating boards with all joints taped and filled, or skimmed according to British Gypsum s recommendations. The quoted performances are achieved only if British Gypsum components are used throughout, and the Company s fixing recommendations are strictly observed. Any variation in the specifications should be checked with British Gypsum. NBS work section K0 - Plasterboard drylinings / partitions / ceilings 0

8 T F 0 E bgtechnical.enquiries@bpb.com BS Table fire protection to steel beams supporting concrete floors Solutions to satisfy the requirements of BS 7: Part : 97 L I F E T I M E SPECSURE S Y S T E M W A R R A N T Y ceiling suspended beneath steel beams supporting a concrete floor. Ceiling linings as in table. ceiling suspended beneath steel beams supporting a concrete floor. Ceiling linings as in table. Detail Board Ceiling Approx. MF MF7 System type lining weight support support reference thickness centres centres mm kg/m mm mm 0 minutes fire resistance BS WallBoard x C000 0 minutes fire resistance BS FireLine x C000 Glasroc F MULTIBOARD x G000 0 minutes fire resistance BS Glasroc F MULTIBOARD x G000 FireLine x C000 Concrete floors as described in BS 7: Part. The steel beams subjected to test had a section factor A/V (Hp/A) of 0m - calculated on the basis of three sided profiled exposure. The suspended ceiling will also provide adequate protection to steel beams with a lower section factor. NBS work section K0 - Plasterboard drylinings / partitions / ceilings 09

9 Performance ( Refer to section - Basic principles of system design) Sound insulation Table upgrading the sound insulation of concrete floors L I F E T I M E SPECSURE S Y S T E M W A R R A N T Y ceiling suspended beneath basic floor to give 0mm cavity. Ceiling linings as in table. ceiling suspended beneath basic floor to give 0mm cavity. Ceiling linings as in table. ceiling suspended beneath basic floor to give 0mm cavity, with 00mm Isover Spacesaver Ready-Cut in cavity. Ceiling linings as in table. ceiling suspended beneath basic floor to give 0mm cavity, with 00mm Isover Spacesaver Ready-Cut in cavity. Ceiling linings as in table. Detail Board Ceiling Approx. Sound insulation System type lining weight Airborne Impact reference thickness R w (R w + Ctr) L nw mm kg/m db db WallBoard x. 0 (0) C000 WallBoard x. () C0007 SoundBloc x. () 0 C000 SoundBloc x. () 7 C0009 Basic floor construction is lightweight concrete joist floor with insulated concrete infill panel (surface density of infill is 90kg/m ) and total depth 0mm. Sound insulation is R w db (airborne) and L nw 9 db (impact). NB The fire resistance and sound insulation performances are for imperforate partitions, walls and ceilings incorporating boards with all joints taped and filled, or skimmed according to British Gypsum s recommendations. The quoted performances are achieved only if British Gypsum components are used throughout, and the Company s fixing recommendations are strictly observed. Any variation in the specifications should be checked with British Gypsum. NBS work section K0 - Plasterboard drylinings / partitions / ceilings 0

10 T F 0 E bgtechnical.enquiries@bpb.com EN BS Table 7 upgrading the fire resistance and sound insulation of timber floors Solutions to satisfy the requirements of BS EN -: 000 (where applicable) and BS 7: Part : 97 L I F E T I M E SPECSURE S Y S T E M W A R R A N T Y ceiling suspended beneath basic floor (ceiling removed) to give 77mm cavity. 00mm Isover Spacesaver Ready-Cut laid on ceiling boards. Ceiling linings as in table. ceiling suspended beneath basic floor (ceiling removed) with a layer of Gyproc Plank fixed to the underside of the chipboard to give a mm cavity. 00mm Isover Spacesaver Ready-Cut laid on ceiling boards. Ceiling linings as in table. ceiling suspended beneath basic floor (ceiling removed) using Gypframe Acoustic Hangers to give 77mm cavity. 00mm Isover Spacesaver Ready-Cut laid on ceiling boards. Ceiling linings as in table. New floating floor laid over joists. ceiling suspended beneath 9mm x mm timber joists at 00mm centres to give 77mm cavity. 00mm Isover Spacesaver Ready-Cut laid on ceiling boards. Ceiling linings as in table. ceiling suspended beneath GypFloor SILENT using Gypframe Acoustic Hangers to give 77mm cavity. 00mm Isover Spacesaver Ready-Cut laid on ceiling boards. Ceiling linings as in table. Detail Board Ceiling Approx. Floor Sound insulation System type lining weight depth Airborne Impact reference thickness R w (R w + Ctr) L nw mm kg/m mm db db 0 minutes fire resistance BS SoundBloc x C0007 SoundBloc x. 0 () 7 C0009 SoundBloc x. 0 () C00 SoundBloc x. 7 () 0 C00 0 minutes fire resistance EN BS SoundBloc x C00 FireLine x. 0 () C00 SoundBloc x 7 () C00 SoundBloc x 7 () 0 C00 SoundBloc x 7 () C00 90 minutes fire resistance BS FireLine x 9 C000 FireLine x () C00 Basic floor construction is mm x 9mm timber joists at 00mm centres with mm t&g wood chipboard flooring. mm t&g wood chipboard spot bonded to Gyproc Plank on Isover Sound Deadening Floor Slab laid on overlining of mm plywood. NB The fire resistance and sound insulation performances are for imperforate partitions, walls and ceilings incorporating boards with all joints taped and filled, or skimmed according to British Gypsum s recommendations. The quoted performances are achieved only if British Gypsum components are used throughout, and the Company s fixing recommendations are strictly observed. Any variation in the specifications should be checked with British Gypsum. NBS work section K0 - Plasterboard drylinings / partitions / ceilings

11 Table Sound absorption data for Gyptone boards - tested on a 00mm plenum QUATTRO Gyptone QUATTRO 0 00 k k k α w AC NRC C 0.70 C0A09 QUATTRO Gyptone QUATTRO Gyptone QUATTRO plus 0mm Isover APR k k k α w AC NRC C C 0.7 C0A0 C0A07 QUATTRO C0A0 C0A0 Gyptone QUATTRO Gyptone QUATTRO plus 00mm Isover Spacesaver Ready-Cut 0 00 k k k α w AC NRC (L) D (L) D 0. QUATTRO C0A0 C0A07 Gyptone QUATTRO 7 Gyptone QUATTRO 7 plus 0mm Isover APR k k k α w AC NRC (L) D 0. (L) D 0. AC Absorption Class. NRC Noise Reduction Coefficient. NB For further information on sound absorption performance of Gyptone boards, refer to British Gypsum Ceiling Products Acoustic Performance Data publication, available to download from NB All products have been tested to BS EN 0 and ISO. The single figure rating practical sound absorption coefficient α w is calculated in accordance with EN ISO. Suffix letters indicate where performance is limited at either low, medium or high frequencies.

12 T F 0 E bgtechnical.enquiries@bpb.com Table (continued) Sound absorption data for Gyptone boards - tested on a 00mm plenum LINE C0A00 C0A00 Gyptone LINE Gyptone LINE plus 00mm Isover Spacesaver Ready-Cut 0 00 k k k α w AC NRC (L) D (L) D 0. LINE 7 Curve C0A0 C0A09 Gyptone LINE 7 Curve Gyptone LINE 7 Curve plus 00mm Isover Spacesaver Ready-Cut 0 00 k k k α w AC NRC (L) D (L) D 0. AC Absorption Class. NRC Noise Reduction Coefficient. NB For further information on sound absorption performance of Gyptone boards, refer to British Gypsum Ceiling Products Acoustic Performance Data publication, available to download from NB All products have been tested to BS EN 0 and ISO. The single figure rating practical sound absorption coefficient α w is calculated in accordance with EN ISO. Suffix letters indicate where performance is limited at either low, medium or high frequencies.

13 Table 9 Sound absorption data for Rigitone boards / Rigitone / (plenum depth 0mm) Rigitone / (plenum depth 00mm) Rigitone / (plenum depth 00mm plus 0mm Isover Frame Batt ) 0 00 k k k α w AC NRC (M) D 0. C0A0 C0A07 C0A (LM) D (LM) C 0. 0/ Rigitone 0/ (plenum depth 0mm) Rigitone 0/ (plenum depth 00mm) Rigitone 0/ (plenum depth 00mm plus 0mm Isover Frame Batt ) 0 00 k k k α w AC NRC (M) D C0A0 C0A09 C0A (LM) D (LM) C 0. /0 Rigitone /0 (plenum depth 0mm) Rigitone /0 (plenum depth 00mm) Rigitone /0 (plenum depth 00mm plus 0mm Isover Frame Batt ) 0 00 k k k α w AC NRC (M) D 0. C0A00 C0A0 C0A (LM) D (LM) C 0. AC Absorption Class. NRC Noise Reduction Coefficient. NB For further information on sound absorption performance of Gyptone boards, refer to British Gypsum Ceiling Products Acoustic Performance Data publication, available to download from NB All products have been tested to BS EN 0 and ISO. The single figure rating practical sound absorption coefficient α w is calculated in accordance with EN ISO. Suffix letters indicate where performance is limited at either low, medium or high frequencies.

14 T F 0 E bgtechnical.enquiries@bpb.com Table 9 (continued) Sound absorption data for Rigitone boards -0/ Rigitone -0/ (plenum depth 0mm) Rigitone -0/ (plenum depth 00mm) Rigitone -0/ (plenum depth 00mm plus 0mm Isover Frame Batt ) 0 00 k k k α w AC NRC (M) D 0. C0A0 C0A0 C0A (LM) D (LM) C Rigitone --0 (plenum depth 0mm) Rigitone --0 (plenum depth 00mm) Rigitone --0 (plenum depth 00mm plus 0mm Isover Frame Batt ) 0 00 k k k α w AC NRC (LM) E 0. C0A0 C0A07 C0A (LM) D (LM) D SUPER Rigitone --0 SUPER (plenum depth 0mm) Rigitone --0 SUPER (plenum depth 00mm) Rigitone --0 SUPER (plenum depth 00mm plus 0mm Isover Frame Batt ) 0 00 k k k α w AC NRC (LM) D 0. C0A0 C0A09 C0A (LM) D (LM) D 0.70 AC Absorption Class. NRC Noise Reduction Coefficient. NB For further information on sound absorption performance of Gyptone boards, refer to British Gypsum Ceiling Products Acoustic Performance Data publication, available to download from NB All products have been tested to BS EN 0 and ISO. The single figure rating practical sound absorption coefficient α w is calculated in accordance with EN ISO. Suffix letters indicate where performance is limited at either low, medium or high frequencies.

15 Design Cavity barriers Where cavity barriers are required, these can be formed using Gyproc FireLine or Glasroc F MULTIBOARD screw-fixed to a simple metal or timber frame. The framing should be fixed to the structure to avoid undue loading of the ceiling suspension grid or, alternatively, additional hangers should be incorporated to support the ceiling alongside the cavity barrier. Refer to section 0 Cavity fire barriers. Relative humidity ceilings lined with Gyproc, Gyptone, Rigitone or British Gypsum specialist boards are suitable for use under normal occupancy conditions. Buildings in which they are used should be dry, glazed and enclosed, with environmental conditions of no greater than 70% RH at 0 C to 0 C. For high humidity / high moisture conditions use Gyproc plasterboard MR variants or Glasroc F MULTIBOARD. Vapour control For areas other than where perforated Gyptone or Rigitone boards are used, a face layer of DUPLEX grade plasterboard or two coats of Gyproc Drywall Sealer applied to the face of the lining 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 airspace behind the ceiling. Increased levels of sound absorption can be achieved by including insulation over the back of the ceiling. Where sound insulation room-to-room is required, sound attenuation (D ncw ) of 9 db can be achieved by the inclusion of 00mm Isover Spacesaver Ready-Cut over the back of 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 insulation can be laid over the suspension grid to provide the required standard of thermal insulation. Contact the British Gypsum Drywall Academy for further guidance. Suspension - Gyproc, British Gypsum specialist and Gyptone board linings Fixing points for suspending the metal grid are required at 00mm centres in each direction. Suitable fixing devices should be employed when fixing to the structure. The ceiling grid can be suspended from a concrete soffit using Gypframe MF Soffit Cleats and Gypframe MF Strap Hanger, or alternatively, Gypframe GA Steel Angle. The latter provides a more robust suspension support, which restricts any flexing of the lining when pressure is applied from below. Gypframe GA Steel Angle is thus the preferred suspension option when a plaster finish is specified to Gyproc boards. If Gypframe GA Steel Angle is used, it is recommended that it is fixed to the soffit via Gypframe MF Soffit Cleats. If fixing Gypframe GA Steel Angle direct to the soffit, the angle is cut and bent to fit. However, this will reduce the maximum loads that the grid is capable of supporting by %. Furthermore, fixing Gypframe GA Steel Angles direct is not suitable if the ceiling is likely to deflect due to varying pressures and is not suitable for fixing to a sloping substrate. Gypframe Acoustic Hangers can be used to suspend the grid from timber joists to maximise the degree of acoustic isolation (see Construction details 7). In a comparative test a db improvement in airborne sound insulation and a db improvement in impact sound insulation were achieved. See Table 7, Construction details and, relating to double layer Gyproc SoundBloc linings. With concrete floors the high mass of the construction means that high levels of acoustic performance can be achieved when the ceiling is suspended by conventional means, i.e. Gypframe MF Strap Hangers or Gypframe GA Steel Angle. Suspension - Rigitone board linings Gypframe MF7 Primary Support Channels are fixed at 000mm centres. Fixing points to the structure for the Gypframe MF7 Primary Support Channels are required at 900mm centres. In addition to this, the Gypframe MF Ceiling Section should be installed at nominal 0mm centres. Ceiling lift Changes to Building Regulations Approved Document L, 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 minimise the risk of ceiling lift. Where sufficient pressure relief cannot be designed in, it is recommended that the Gypframe MF Ceiling Section and the Gypframe MF7 Primary Support Channel should be screw-fixed together using two Gyproc Wafer Head Jack-Point Screws at each intersection, particularly where non-perforated board linings are specified. Partition to suspended ceiling junction In situations where a GypWall metal stud partition passes through a ceiling, which is to both sides of the partition and appropriately fixed to both this partition and perimeter partitions / 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 ceiling or ceiling to structural soffit height. Care should be taken during installation of tall partitions so as to not adversely affect their performance. Contact the British Gypsum Drywall Academy for further guidance. Where a GypWall metal stud partition is fixed to the framework of a ceiling, in accordance with British Gypsum s installation instructions, the permissible maximum height is equal to that of where it is fixed direct to a structural soffit of the same height. Please refer to section - Basic principles of system design for general guidance

16 T F 0 E bgtechnical.enquiries@bpb.com Imposed loads Tables, and provide loading data for the suspension grid for Gyproc, British Gypsum specialist, Gyptone and Rigitone boards respectively. Maximum loads will be reduced by % when Gypframe GA Steel Angle is fixed directly to the soffit (modified loads are shown in brackets). Table 0 Maximum recommended loads on with Gyproc or British Gypsum specialist board linings Maximum load including Suspension MF7 weight of board and any point channel insulation centres centres MF at 0mm centres kg/m (modified load) mm mm Services The plenum can be used to route all service requirements including ducting, pipework, electrical cables and conduit. 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 metal grid or to supplementary framing. Some adjustment of the primary grid may be required to support particularly heavy loads, see Tables, and. Where loads outside this range are anticipated, independent suspension should be provided from the structure. 0 () (0) () () Gypframe MF Ceiling Section. Gypframe MF7 Primary Support Channel. Table Maximum recommended loads on with Gyptone board linings Maximum load including Suspension MF7 weight of board and any point channel insulation centres centres MF at 00mm centres kg/m (modified load) mm mm Control joints Gyproc Control Joints may be required in the ceiling to relieve stresses induced by expansion and contraction of the structure. It is recommended that they coincide with movement joints within the surrounding structure. Rigitone expansion joints Rigitone boards should be cut 0mm short of the perimeter wall and should not be fixed to the perimeter channel, see Construction details -. Board finish Additional care and attention should be exercised when jointing Rigitone boards so as not to fill the perforations and impair the acoustic performance of the finished ceiling. Refer to section Finishing systems and decorative effects. () () (9) Gypframe MF Ceiling Section. Gypframe MF7 Primary Support Channel. Table Maximum recommended loads on with Rigitone board linings Maximum load including Suspension MF7 weight of board and any point channel insulation centres centres MF at 0mm centres kg/m (modified load) mm mm 0 () Gypframe MF Ceiling Section. Gypframe MF7 Primary Support Channel. Please refer to section - Basic principles of system design for general guidance 7

17 Construction details Perimeter parallel to Gypframe MF Ceiling Section - screw-fixed Perimeter perpendicular to Gypframe MF Ceiling Section - screw-fixed Bulkhead - screw-fixed Change of level - screw-fixed Max. 0mm 7 Max. 00mm Max. 0mm Max. 00mm Max. 0mm 7 Gyproc plasterboard or British Gypsum specialist board Gypframe MF Ceiling Section Gypframe MF Perimeter Channel Gypframe MF7 Primary Support Channel Gypframe MF Strap Hanger or Gypframe GA Steel Angle Gyproc Wafer Head Jack-Point Screw Gypframe MF Nut and Bolt Gypframe MF Soffit Cleat

18 T F 0 E bgtechnical.enquiries@bpb.com Reflected ceiling plan - single layer Reflected ceiling plan - double layer Gyproc plasterboard or British Gypsum specialist board Gypframe MF Ceiling Section Gypframe MF Perimeter Channel Gypframe MF7 Primary Support Channel Gypframe MF Strap Hanger or Gypframe GA Steel Angle 9

19 7 Suspension from timber joist using Gypframe Acoustic Hangers 0 9 mm 7 Gyproc Profilex Access Panel installation 7 Gyproc plasterboard or British Gypsum specialist board Gypframe MF Ceiling Section Gypframe MF Perimeter Channel Gypframe MF7 Primary Support Channel Gypframe MF Strap Hanger or Gypframe GA Steel Angle Gyproc Wafer Head Jack-Point Screw Gypframe MF Nut and Bolt Gypframe MF Soffit Cleat 9 Gypframe Acoustic Hanger fixed with two Gyproc Drywall Timber Screws 0 M bolt and locking nut (by others) Timber joist floor Isover insulation Gypframe GA Steel Angle Gyproc Profilex Access Panel 0

20 T F 0 E bgtechnical.enquiries@bpb.com 9 Perimeter parallel to Gypframe MF Ceiling Section - Gyptone 0 Perimeter perpendicular to Gypframe MF Ceiling Section - Gyptone Reflected ceiling plan - Gyptone Gyptone boards Gypframe MF Ceiling Section Gypframe MF Perimeter Channel Gypframe MF7 Primary Support Channel Gypframe MF Strap Hanger or Gypframe GA Steel Angle Gypframe MF9 Connecting Clip

21 Perimeter parallel to Gypframe MF Ceiling Section - Rigitone Max. 0mm Perimeter perpendicular to Gypframe MF Ceiling Section - Rigitone Max. 0mm 7 7 Reflected ceiling plan - Rigitone Rigitone boards Gypframe MF Ceiling Section Gypframe MF Perimeter Channel Gypframe MF7 Primary Support Channel 7 Gypframe MF Strap Hanger or Gypframe GA Steel Angle Gypframe MF9 Connecting Clip Rigitone Vario 0 filler NB A special procedure is used for fixing and jointing Rigitone boards. Detailed installation notes are given in the current British Gypsum Ceilings Installation Guide, available to download from

22 T F 0 E bgtechnical.enquiries@bpb.com