Issue date: 15th January Key changes since original publication (July 2005):

Transcription

1 Issue date: th January 007 Key changes since original publication (July 00): January 007 Page 7 MultiBoard detail (G00) deleted from 0 minute specs in Table. Page 7 Floor depth column deleted from table. Page 7 System references for 8/8 (C0A07 & C0A0) swapped in Table 0. Page 8 Construction detail 0 Bulkhead replaced - now incorporates MF at end. August 00 Whole section Isowool branding changed to Isover. Page 8 GAH/GAH products separated and shown as separate option. Page 7 BS and EN rated fire resistance specs added to table 7. April 00 Page 9 text amended under Board fixings relating to Gyptone and Rigitone boards. Page 7 New detail added, plus new specifications for details and. Page 78 Revised text inserted for Ceiling lift. Page 8 NB statement added relating to the installation of Rigitone. Gyproc, Thistle, Gypframe, Glasroc and Arteco are all registered trade names of BPB United Kingdom Limited. Isover is a registered trade name of Saint-Gobain. British Gypsum reserve the right to revise product specification without notice. The information given is correct to the best of our knowledge at the time of publication, but it is the users responsibility to ensure it remains current prior to use. Please refer to our Product Data Sheet which is available on request. For a comprehensive and up to date library of information visit our website at: Technical enquiries British Gypsum Limited, Drywall Academy Advice Centre, East Leake, Loughborough, Leicestershire LE JT Telephone: 0870 # (Literature), # (Specifiers), # (Merchants), # (Contractors) For quality and security reasons, calls may be recorded. Fax: bgtechnical.enquiries@bpb.com Training enquiries: Casoline-mf-0.pdf British Gypsum THE WHITE BOOK 00

2 Concealed grid MF suspended ceiling system Manchester Academy

3 Concealed grid MF suspended ceiling system db Airborne db Impact mins is a suspended ceiling system suitable for most internal drylining applications. The grid is fully concealed and the ceiling lining is joint-treated or plastered to present a seamless, monolithic appearance. Sector Office / commercial Educational Residential Healthcare Leisure Industrial + + Gypframe MF7 Primary Support Channel Gypframe MF9 Connecting Clip Gypframe MF Ceiling Section Key facts Monolithic appearance Suspension from concrete or timber floors Acoustic hangers provide option of resilient suspension Ventilation ducts and other services accommodated in plenum Access panels provide services access Easy to create bulkheads and change levels Durable ceiling lining 7

4 L SPECSURE S Y S T E M System components Gypframe metal products MF Ceiling Section Secondary section below MF7 MF Perimeter Channel Perimeter support for MFs Length 00mm Length 00mm Fixing and finishing products Gyproc Profilex Access Panels For access to the plenum for maintenance purposes. Gyproc Drywall Screws For fixing boards to stud framing up to 0.79mm thick. Gyproc Wafer Head Drywall Screws For metal-to-metal fixing up to 0.79mm thick.. MF7 Primary Support Channel Primary support section Length 00mm Gyproc Wafer Head Jack-Point Screws For fixing hanger to Gypframe MF7. MF8 Strap Hanger Suspension of ceiling grid or GA Steel Angle Length m (coil) Length 900mm Gyproc Sealant For sealing air paths to achieve optimum sound insulation. Isover General Purpose Roll For providing acoustic / thermal insulation. GAH Acoustic Hanger GAH Acoustic Hanger (supplied with washers) Length mm Length 70mm Isover Modular Roll For providing acoustic / thermal insulation. MF9 Connecting Clip Fixing MF to MF7 Isover TS8 For providing acoustic / thermal insulation. MF Nut and Bolt Joining hanger to soffit cleat MF Soffit Cleat Suspension point from structural soffit Gyproc and Glasroc board products Isover Sound Deadening Floor Slabs Rigid Grade To provide sound deadening in timber-based intermediate separating floors. Stone Mineral Wool For providing acoustic / thermal insulation. Gyproc WallBoard Thickness Width Gyproc SoundBloc Thickness Width Gyproc FireLine Thickness Width Glasroc MultiBoard Thickness Width Glasroc FireCase S Thickness Width., mm 900mm., mm 00mm., mm 900mm, 0,.mm 00mm mm 00, 00mm Gyproc jointing materials For seamless jointing. 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 Board Finish or Thistle Multi-Finish To provide a plaster skim finish. Also available in DUPLEX grades where vapour control is required. I F E T I M E W A R R A N T Y Always use genuine branded British Gypsum components to qualify for SpecSure lifetime warranty 8

5 T 0870 F 0870 E bgtechnical.enquiries@bpb.com System components (continued) Arteco Gyptone board products Gyptone LINE Thickness.mm Width 00mm Gyptone QUATTRO Thickness.mm Width 00mm Arteco Rigitone board products Rigitone 8/8 Thickness.mm Length 998mm Width 88mm Rigitone 0/ Thickness.mm Length 00mm Width 9mm Gyptone QUATTRO 7 Thickness.mm Width 00mm Gyptone QUATTRO Thickness.mm Width 00mm Rigitone /0 Thickness.mm Length 00mm Width 00mm Rigitone -0/ Thickness.mm Length 980mm Width 88mm Gyptone LINE 7 Curve Thickness.mm Width 900mm Gyptone BASE Curve Thickness.mm Width 900mm Rigitone 8-/0 Thickness.mm Length 000mm Width 00mm Rigitone 8-/0 SUPER Thickness.mm Length 90mm Width 00mm 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 MF8 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 and secured to the hangers. 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 Gypframe MF9 Connecting Clips. 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 Glasroc boards should be at 0mm centres at board ends, 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. NB A special procedure is used for fixing and jointing Arteco Rigitone and Gyptone boards. Detailed installation notes are given in the current British Gypsum SiteBook, or visit For full installation details, refer to the British Gypsum SITE BOOK or visit 9

6 Performance ( Fire resistance EN Refer to - Basic principles of system design) Table Fire protection to timber floor construction Floor boarding of mm minimum t&g softwood or wood particle floor boarding. Solid timber joists 8 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 8 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 SPECSURE 0 minutes fire resistance EN FireLine x C000 L 90 minutes fire resistance EN I F E T I M E S Y S T E M W A R R A N T Y MultiBoard x G00 Maximum permissible timber grade of 00% load ratio C. EN Table Fire protection to floor or roof cavity above suspended ceiling suspended ceiling fixed to structure. mm stone mineral wool slabs (00kg/m ) laid over Gypframe MF Ceiling Section 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 FireCase S 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. NB The fire resistance and sound insulation performances are for imperforate partitions, walls and ceilings incorporating boards with 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 70

7 T 0870 F 0870 E bgtechnical.enquiries@bpb.com BS Table Fire protection to timber floor construction Floor boarding of mm minimum t&g softwood or wood particle floor boarding. Solid timber joists 8 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 SPECSURE FireLine x C000 WallBoard x C000 0 minutes fire resistance BS FireLine x C000 L I F E T I M E S Y S T E M W A R R A N T Y FireLine x C000 0 minutes fire resistance BS MultiBoard x G00 Joists not less than mm wide at 00mm centres. Maximum permissible timber grade of 00% load ratio C. 90 minutes fire resistance BS BS Table Fire protection to floor or roof cavity above suspended ceiling suspended ceiling fixed to structure. Normal fixing centres for Gypframe MFs and MF7s (0mm and 00mm respectively). Insulation laid over Gypframe MF Ceiling Section Detail Board Ceiling Insulation MF MF7 System type lining support support reference thickness centres centres mm mm mm 0 minutes fire resistance BS WallBoard x. 00mm Isover General 0 00 C00 Purpose Roll laid over grid 0 minutes fire resistance BS FireLine x 0mm stone mineral wool 0 00 C00 slab ( kg/m ) laid over grid 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. NB The fire resistance and sound insulation performances are for imperforate partitions, walls and ceilings incorporating boards with 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 7

8 Performance ( BS Refer to - Basic principles of system design) Table Fire protection to steel beams supporting concrete floors ceiling suspended beneath steel beams supporting a concrete floor, lining 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 SPECSURE WallBoard x C000 0 minutes fire resistance BS FireLine x C000 MultiBoard x G000 L 0 minutes fire resistance BS I F E T Sound insulation I M E W A R R A N T Y MultiBoard x G0008 FireLine x C000 Table Upgrading the sound insulation of concrete floors ceiling suspended beneath basic floor to give 0mm cavity, lining as in table. ceiling suspended beneath basic floor to give 0mm cavity, with 80mm Isover Modular Roll in cavity, lining as in table. S Y S T E M 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 db WallBoard x. 0 (0) 8 C000 WallBoard x. 9 8 () C0007 SoundBloc x. () 0 C0008 SoundBloc x. () 7 C0009 Concrete floors as described in BS 7: Part : 987. 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. 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). Normal fixing centres for Gypframe MFs and MF7s (0mm and 00mm respectively). NB The fire resistance and sound insulation performances are for imperforate partitions, walls and ceilings incorporating boards with 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 7

9 T 0870 F 0870 E bgtechnical.enquiries@bpb.com EN BS Table 7 Upgrading the sound insulation of timber floors ceiling suspended beneath basic floor to give 0mm cavity. 80mm Isover Modular Roll laid on ceiling boards, linings as in table. ceiling suspended beneath basic floor (ceiling removed) to give 77mm cavity. 80mm Isover Modular Roll laid on ceiling boards, 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 8mm cavity. 80mm Isover Modular Roll laid on ceiling boards, linings as in table. ceiling suspended beneath basic floor SPECSURE New floating floor laid over joists. ceiling ceiling suspended beneath (ceiling removed) using Gypframe Acoustic Hangers suspended beneath 9mm x mm timber joists at GypFloor SILENT using Gypframe Acoustic Hangers to give 77mm cavity. 80mm Isover Modular Roll 00mm centres to give 77mm cavity. 80mm Isover to give 77mm cavity. 00mm Isover Modular laid on ceiling boards, linings as in table. Modular Roll laid on ceiling boards, linings as in table. Roll laid on ceiling boards, 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 db L I F E T 0 minutes fire resistance BS I M E S Y S T E M W A R R A N T Y SoundBloc x C000 SoundBloc x. 0 0 C000 SoundBloc x C0007 SoundBloc x C0008 SoundBloc x. 0 () 7 C0009 SoundBloc x. 0 () C00 SoundBloc x. 7 () 0 C00 0 minutes fire resistance EN BS FireLine x. 0 9 C000 SoundBloc x C00 FireLine x. 0 () C00 SoundBloc x 7 () C00 SoundBloc x 7 8 () 0 C00 SoundBloc x 7 () C00 90 minutes fire resistance BS FireLine x 9 C000 FireLine x () C00 Basic floor construction is x 9mm timber joists at 00mm centres with t&g wood chipboard flooring and basic ceiling (if lath and plaster, it should be supported by chicken wire, securely nailed to joists). Sound insulation is R w 8 db (airborne) and L nw 79 db (impact). 8mm t&g wood chipboard spot bonded to Gyproc Plank on Isover Sound Deadening Floor Slabs - Rigid Grade laid on overlining of mm plywood. Normal fixing centres for MFs and MF7s (0mm and 00mm respectively). Suspension method is Gypframe MF8 Strap Hangers or Gypframe GA Steel Angle unless otherwise stated. NB The fire resistance and sound insulation performances are for imperforate partitions, walls and ceilings incorporating boards with 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 7

10 Performance ( Refer to - Basic principles of system design) Table 8 Sound insulation of GypWall / ceiling composite construction Partition construction Weighted standardised level difference (D ntw ) and system reference. Suspended ceiling construction Double layer Single layer.mm Gyproc.mm Gyproc SPECSURE SoundBloc. 80mm Isover Modular Roll on back. SoundBloc. 80mm Isover Modular Roll on back. Double layer.mm Gyproc SoundBloc. Single layer.mm Gyproc SoundBloc. mm Gypframe metal studs at db mm centres. mm Isover APR System reference C0J00 C0J00 C0J00 C0J00 00 in cavity. One layer of Gyproc Plank and one layer of.mm Gyproc SoundBloc each side. L I F E T I M E S Y S T E M W A R R A N T Y mm Gypframe metal studs at db mm centres. mm Isover APR System reference C0J00 C0J00 C0J007 C0J in cavity. Two layers of.mm Gyproc SoundBloc each side. 70mm Gypframe metal studs at db 00mm centres. mm Isover APR System reference C0J009 C0J00 C0J0 C0J0 00 in cavity. Two layers of.mm Gyproc SoundBloc each side. Refer to GypWall CLASSIC system for partition performance data based on laboratory tests. NB The fire resistance and sound insulation performances are for imperforate partitions, walls and ceilings incorporating boards with 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 7

11 T 0870 F 0870 E bgtechnical.enquiries@bpb.com Table 9 Sound absorption data for Arteco Gyptone boards - tested on a 00mm plenum LINE Practical abs. coeff αp k k k System reference C0A00 Gyptone LINE Gyptone LINE plus 00mm Isover General Purpose Roll 0 00 k k k α w AC NRC (L) D 0. QUATTRO.00 C0A (L) D 0. Practical abs. coeff αp k k k System reference C0A0 C0A0 Gyptone QUATTRO Gyptone QUATTRO plus 00mm Isover General Purpose Roll 0 00 k k k α w AC NRC (L) D (L) D 0. QUATTRO 7.00 Practical abs. coeff αp k k k System reference C0A0 C0A07 Gyptone QUATTRO 7 Gyptone QUATTRO 7 plus 00mm Isover General Purpose Roll 0 00 k k k α w AC NRC (L) D (L) D 0. Curve LINE 7.00 Practical abs. coeff αp k k k Gyptone CURVE LINE 7 Gyptone CURVE LINE 7 plus 00mm Isover General Purpose Roll 0 00 k k k α w AC NRC System reference C0A (L) D 0. C0A (L) D 0. QUATTRO.00 Practical abs. coeff αp k k k Gyptone QUATTRO 0 00 k k k α w AC NRC System reference C0A C 0.70 AC Absorption Class NB For further information on sound absorption performance of Gyptone boards, refer to Arteco Ceiling Products Acoustic Performance Data publication. NB All products have been tested to BS EN 0:99 and ISO :98. The single figure rating practical sound absorption coefficient α w is calculated in accordance with EN ISO :997, suffix letters indicate where performance is limited at either low, medium or high frequencies. 7

12 Table 0 Sound absorption data for Arteco Rigitone boards 8/8 Practical absorption Coeff α p k k k Rigitone 8/8 (Plenum depth 00mm plus 7mm Isover TS8) Rigitone 8/8 (Plenum depth 0mm) Rigitone 8/8 (Plenum depth 00mm) 0 00 k k k α w AC NRC System reference C0A (LM) C 0.8 C0A (M) D 0. C0A (LM) D / Practical absorption Coeff α p k k k System reference C0A0 C0A08 Rigitone 0/ (Plenum depth 00mm plus 7mm Isover TS8) Rigitone 0/ (Plenum depth 0mm) Rigitone 0/ (Plenum depth 00mm) 0 00 k k k α w AC NRC (LM) C (M) D 0.0 C0A (LM) D 0. /0 Practical absorption Coeff α p k k k System reference C0A0 Rigitone /0 (Plenum depth 00mm plus 7mm Isover TS8) Rigitone /0 (Plenum depth 0mm) Rigitone /0 (Plenum depth 00mm) 0 00 k k k α w AC NRC (LM) C 0.8 C0A (LM) D 0. C0A (LM) D 0. AC Absorption Class NB For further information on sound absorption performance of Gyptone boards, refer to Arteco Ceiling Products Acoustic Performance Data publication. NB All products have been tested to BS EN 0:99 and ISO :98. The single figure rating practical sound absorption coefficient α w is calculated in accordance with EN ISO :997, suffix letters indicate where performance is limited at either low, medium or high frequencies. 7

13 T 0870 F 0870 E bgtechnical.enquiries@bpb.com Table 0 (continued) Sound absorption data for Arteco Rigitone boards -0/ Practical absorption Coeff α p k k k System reference C0A0 Rigitone -0/ (Plenum depth 00mm plus 7mm Isover TS8) Rigitone -0/ (Plenum depth 0mm) Rigitone -0/ (Plenum depth 00mm) 0 00 k k k α w AC NRC (LM) C 0.90 C0A0 C0A (M) D (LM) D Practical absorption Coeff α p k k k System reference C0A08 Rigitone 8--0 (Plenum depth 00mm plus 7mm Isover TS8) Rigitone 8--0 (Plenum depth 0mm) Rigitone 8--0 (Plenum depth 00mm) 0 00 k k k α w AC NRC (LM) D 0. C0A (LM) E 0. C0A (LM) D SUPER Practical absorption Coeff α p k k k System reference C0A09 C0A08 C0A09 Rigitone 8--0 SUPER (Plenum depth 00mm plus 7mm Isover TS8) Rigitone 8--0 SUPER (Plenum depth 0mm) Rigitone 8--0 SUPER (Plenum depth 00mm) 0 00 k k k α w AC NRC (LM) D (M) D (LM) D 0.0 AC Absorption Class NB For further information on sound absorption performance of Gyptone boards, refer to Arteco Ceiling Products Acoustic Performance Data publication. NB All products have been tested to BS EN 0:99 and ISO :98. The single figure rating practical sound absorption coefficient α w is calculated in accordance with EN ISO :997, suffix letters indicate where performance is limited at either low, medium or high frequencies. 77

14 Design Cavity barriers Where cavity barriers are required, these can be formed using Gyproc FireLine or Glasroc 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 7 Cavity fire barriers. Relative humidity ceilings lined with Gyproc, Arteco or Glasroc 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 0ºC to 0ºC. For high humidity / high moisture conditions use Gyproc plasterboard mr variants or Glasroc MultiBoard. Vapour control For areas other than where perforated Arteco Gyptone and 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 Arteco 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 9dB can be achieved by the inclusion of 00mm Isover General Purpose Roll 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 Advice Centre for guidance. Thermal resistance (R) value for Arteco Gyptone and Rigitone boards is 0.07mk/w (-% area perforated). Suspension Gyproc, Glasroc 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. Refer to Basic principles of system design. The ceiling grid can be suspended from a concrete soffit using Gypframe MF Soffit Cleats and Gypframe MF8 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 can, if preferred, be fixed directly to the soffit rather than via Gypframe MF Soffit Cleats. The angle is cut and bent to fit as shown in Construction details - 9. For single layer boarding, where GA Steel Angle is fixed direct, the Gypframe MF7 Primary Support Channel and GA Steel Angles are fixed at 00mm centres. For double layer ceilings the GA Steel Angles are fixed at maximum 00mm centres, but the MF7 Primary Support Channels are closed down to 900mm maximum centres. Gypframe Acoustic Hangers can be used to suspend the grid from timber joists to maximise the degree of acoustic isolation (see Construction details - ). In a comparative test a db improvement in airborne sound insulation and a db improvement in impact sound insulation were achieved. Refer to Table 7, Constructions 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 MF8 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 MF7 s are required at 900mm centres. Partition to suspended ceiling junction Tests on lightweight constructions have revealed the following:- Ceiling lift in dwellings The designer should give consideration to designing in a pressure relief to minimise the risk of ceiling lift in rooms with no permanent ventilation. This situation arises when a door is opened in a virtually leak proof room causing the lightest element in the room, normally the ceiling, to lift, creating a noise. The change in the Building Regulations Part L air tightness requirements within dwellings may increase instances of ceiling lift, due to the increased air pressure when doors are opened. Whilst the noise this may create can be annoying to the occupier, it has no detrimental effect on the performance of the ceiling. In such circumstances, British Gypsum recommends that the Gypframe MF Ceiling Section and Gypframe MF7 Primary Support Channel be fixed together using Gyproc Wafer Head Jack-Point Screws.. In situations where a GypWall metal stud partition, which must be securely fixed to the structure, penetrates, the structural performance of the partition can be based on the floor to suspended ceiling height irrespective of the construction. Therefore, lightweight partitions which are required for space division in tall storey heights will be significantly strengthened by the ceiling system. Where is installed on one side of the partition, only a slight loss of flexural strength will occur when any loading is applied.. The structural performance of a GypWall metal stud partition fixed to the framework of a ceiling, or to noggings cut from Gypframe MF Ceiling Section set at 00mm centres, is equal to the performance of a metal stud partition of the same height fixed direct to the structural soffit. Please refer to - Basic principles of system design for general guidance. 78

15 T 0870 F 0870 E bgtechnical.enquiries@bpb.com Imposed loads Tables, and provide loading data for the suspension grid for Gyproc, Glasroc, Arteco Gyptone and Arteco Rigitone boards respectively, based on a limiting deflection factor of L/00. Maximum loads will be reduced by % from those shown where Gypframe GA Steel Angle is fixed directly to the soffit. Table Maximum recommended loads on CasoLine mf grid with Gyproc or Glasroc board linings Suspension point MF7 channel Maximum load centres centres including weight mm mm of board kg/m Fixtures / Fixings 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. 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 - and. MF Ceiling Sections spaced at maximum 0mm centres. Board finish Refer to 0 Finishing systems and decorative effects. Table Maximum recommended loads on CasoLine mf grid with Arteco Gyptone board linings Suspension MF7 Maximum load including board point channel and any insulation centres centres MFs at 00mm MFs at 0mm mm mm kg/m kg/m NB Additional care and attention should be exercised when jointing Arteco Gyptone and Rigitone boards so as not to fill the perforations and impair the acoustic performance of the finished ceiling Table Maximum recommended loads on CasoLine mf grid with Arteco Rigitone board linings Suspension MF7 Maximum load including board point channel and any insulation centres centres MFs at nominal 0mm mm mm kg/m 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. Please refer to - Basic principles of system design for general guidance. 79

16 Construction details Typical layout for Gyproc plasterboard (900mm wide board illustrated) 00mm 00mm 0mm Typical layout for Arteco Gyptone board (LINE - 00 x 00mm board illustrated) 00mm 00mm 00mm Gypframe MF8 Strap Hanger or Gypframe GA Steel Angle Gypframe MF Ceiling Section Gypframe MF7 Primary Support Channel Ceiling boards Gyproc Drywall Screws Gypframe MF Perimeter Channel 80

17 T 0870 F 0870 E bgtechnical.enquiries@bpb.com Typical layout for Arteco Rigitone board 000mm max. 000mm 000mm A A 0 nom 0 nom 0 nom 0 nom 0 nom 900mm 900mm B 0 nom B 0 max. Perimeter arrangement - Arteco Rigitone boards 000mm max. Perimeter arrangement - Arteco Rigitone boards Section AA 7 0mm Section BB Gypframe MF8 Strap Hanger or Gypframe GA Steel Angle Gypframe MF Ceiling Section Gypframe MF7 Primary Support Channel Arteco Rigitone boards Gyproc Drywall Screws Gypframe MF Perimeter Channel Timber packer Gypframe MF9 Connecting Clip Wall structure NB Refer to the British Gypsum Ceilings installation guide or contact the Drywall Academy Advice Centre before installing Rigitone. 8

18 Perimeter arrangement - Gypframe MF Ceiling Section 7 Perimeter arrangement - Gypframe MF7 Primary Support Channel Clip fixing of Gypframe MF Ceiling Section 9 Pre-forming Gypframe GA Steel Angle for direct fixing to the structure Bulkhead Gypframe MF8 Strap Hanger or GA Steel Angle Gypframe MF Ceiling Section Gypframe MF7 Primary Support Channel Ceiling boards Gyproc Drywall Screws Gypframe MF Perimeter Channel Gypframe MF9 Connecting Clip Gyproc Wafer Head Jack-Point Screw Wall structure Gypframe MF Soffit Cleat Gypframe MF Nut and Bolt

19 T 0870 F 0870 E bgtechnical.enquiries@bpb.com Suspension from timber joists using Gypframe Acoustic Hangers 9 8 Change of level 0 mm 7 Gyproc Profilex Access Panel installation 7 8 Gypframe Acoustic Hanger fixed to Gypframe MF Soffit Cleat with M bolt and locking nut (by others) Gypframe MF Ceiling Section Gypframe MF7 Primary Support Channel Ceiling boards Gyproc Drywall Screws Gypframe MF Perimeter Channel Gypframe MF9 Connecting Clip Gyproc Drywall Timber Screw 9 0 Timber joist Gypframe MF Soffit Cleat Gypframe Acoustic Hanger Gypframe MF Nut and Bolt M bolt and locking nut (by others) Gyproc Profilex Access Panel Gyproc Wafer Head Jack-Point Screw Gypframe MF8 Strap Hanger 8