GypWall TM AUDIO 4.2. Gyproc GypWall AUDIO. Twin frame high performance wall. Key facts. Sector Guide

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1 GypWall TM AUDIO GypWall AUDIO is a lightweight, non-loadbearing, twinframed acoustic wall system offering exceptionally high levels of sound insulation performance. The specialist twin framed system can be used to separate multiple use recreational facilities such as multi-screen cinemas, exhibition areas, conference centres, and leisure centres. GypWall AUDIO consists of two independent Gypframe metal stud frames incorporating Gypframe 92S10 C Studs. The frames are spaced to suit and are cross-braced using either Gypframe 99FC50 Fixing Channels or specialist Gypframe GAB3 Acoustic Braces. Isover insulation or a combination of Isover insulation and stone mineral wool is installed within the cavity and the outer faces of the stud framing lined with the required level of Gyproc plasterboards. 3 Key facts Choice of framing sizes to suit range of performance requirements Exceptionally high levels of sound insulation 1 Can exceed sound insulation requirements for cinemas equipped with high performance sound systems Can achieve high levels of sound insulation Up to 120 minutes fire resistance 2 Satisfies BS5234 strength and robustness requirements for Severe Duty Can provide fire protection to structural steel within the wall cavity Gypframe C Stud Gypframe GAB3 Acoustic Brace or Gypframe 99 FC 50 Fixing Channel Gypframe Floor & Ceiling Channel Lightweight, compared to masonry alternatives Can be built to a maximum height of 11.5 metres Gypframe GAB3 Acoustic Brace provides a resilient brace to give optimum acoustic performance Sector Guide Offices Commercial Retail Sport & Leisure Education Healthcare Industrial Auditoria Custodial Entertainment Residential - Housing Residential - Apartments Residential - High Rise 172

2 T F E enquiries@gyproc.ie COMPONENTS Gyproc board products Gyproc WallBoard Gyproc FireLine Gyproc SoundBloc Gyproc Plank 12.5, 15mm 1200mm 12.5, 15mm 1200mm 12.5, 15mm 1200mm 19mm 600mm Fixing and finishing products Gyproc Jack-Point Screws For fixing boards to stud framing 0.8mm thick or greater and 'I' studs greater than 0.55mm thick. Gyproc Wafer Head Jack-Point Screws For metal-to-metal fixing 0.8mm thick or greater and 'I' studs greater than 0.55mm thick. Gyproc Sealant For sealing airpaths to achieve optimum sound insulation. Gyproc jointing materials Gyproc DuraLine Gypframe metal products 13.5, 15mm 1200mm For seamless jointing. Gyproc edge beads Protecting and enhancing board edges. Gypframe 92 S 10 C Studs Gyproc Control Joint To accommodate structural movement. Gypframe Standard Floor & Ceiling Channel 94 C 70 Gypframe Deep Flange Floor & Ceiling Channel 94 DC 60 Gypframe Extra Deep Flange Floor & Ceiling Channel 94 EDC 70 Gyproc FireStrip For sealing deflection heads. Gyproc Skimcoat, Gyproc Carlite Finish or Gyproc Board Finish Providing a plaster finish. Gypframe 99 FC 50 Fixing Channel Length 2400mm Gypframe GFS1 Fixing Strap Length 2400mm Isover Modular Roll For enhanced acoustic performance. Gypframe GA5 Internal Fixing Angle Stone mineral wool 62kg/m3 slab. Gypframe GA6 Splayed Angle Gypframe GAB3 Acoustic Brace Health and Safety Safety Data Sheets for all Gypsum Industries products are available to download from our website or via our Technical Sales Department. 173

3 book 4_jan10a:a23 GypWall Staggered v1.qxd 15/04/ :04 Page 174 Gyproc GypWall AUDIO INSTALLATION Gypframe Floor & Ceiling Channels are fixed at the head and base to achieve the specified wall thickness. Gypframe C Studs are fitted vertically to friction-fit within the channel sections and to abutments, to form the framework. This allows for adjustment during boarding. Studs should be fitted to face the same way and extended by splicing to the specified height. Additional framing is installed as required to support heavy fixtures. Where specified, mineral wool is installed into the cavity-formed frameworks. The frames are braced using Gypframe GAB3 Acoustic Braces or solid braces formed from Gypframe 99 FC 50 Fixing Channel at specified centres. Gyproc Sealant is applied to the frame perimeters to seal airpaths. Boards are screw-fixed to framing members to form the lining. Horizontal board-end joints in face layer boards should be backed with Gypframe GFS1 Fixing Strap. 174 For full installation details, refer to the Installation Guide at

4 T F E enquiries@gyproc.ie PERFORMANCE Refer to section 3.1 Introduction, for general considerations. Table 2 Dimensions, weights, and performance 1 Two frames of 92 S 10 Gypframe C Studs spaced at 600mm centres, cross-braced with Gypframe 99 FC 50 Fixing Channel at 3600mm centres or Gypframe GAB3 Acoustic Braces at 3300mm centres. Linings and insulation as in table Detail Gyproc Lining Approx. Nominal Recommended Isover Space Fire Sound Performance board thickness weight wall maximum wall -saver Roll resistance 6 insulation substantiation type 1 thickness heights 4 report Fixing Channel GAB3 Acoustic braces braces 5 L/240 L/125 L/240 L/125 mm kg/m 2 mm mm mm mm mm mm mins R w db 3 1 SoundBloc 2 x A Wallboard 2 x A SoundBloc 2 x A Plank A SoundBloc 2 Plank A Fireline 3 SoundBloc 3 x A SoundBloc 3 x x A SoundBloc 3 x x A x100 stone mineral wool SoundBloc 3 x x A x100 stone mineral wool 7 SoundBloc 3 x x A x100 stone mineral wool 1 The fire resistance and sound insulation performances are for imperforate walls incorporating tapered edge boards with all joints taped and filled according to Gypsum Industries recommendations. The quoted performances are achieved only if Gypsum Industries components are used and the Company s fixing recommendations are strictly observed. Any variations required to the specification should be checked with Gypsum Industries. 2 All the wall specifications given in the table achieve a Severe duty rating. Refer to PERFORMANCE, Partition duty, for further details. 3 Laboratory tests were carried out on walls without bracing. Refer to DESIGN, Cross-bracing. 4 For partition heights up to 4200mm 94 C 70 should be used at head and base. For heights between 4200mm and 8000mm use 94 DC 60. For heights >8000mm use 94 EDC Brace centres reduced to 3300mm, refer to DESIGN, Cross bracing. 6 Board joints must be reinforced with Gyproc Paper Joint Tape for the quoted fire resistance periods to be achieved. Please refer to section for full details

5 Environmental Gyproc GypWall AUDIO is unsuitable for use in areas subject to continuously damp or humid conditions. Plasterboards are not suitable for use in temperatures above 49ºC but can be subjected to freezing conditions without risk of damage. Fire protection For reaction to fire classifications of Gyproc Plasterboards, please refer to section 2.1. Fire resistance The fire resistances given in Table 2 are for imperforate walls tested to BS 476: Part 8: 1972 or BS 476: Part 22: 1987 or assessments based on these tests. Sound insulation The R w ratings given in Table 2 are for imperforate partitions and have been tested in accordance with BS EN ISO 140-3: 1995, and rated in accordance with BS EN ISO 717-1: Airtightness is essential for optimum sound insulation. While most junctions will be sealed by standard jointing materials, gaps at the base of the wall and other small airpaths can be sealed using Gyproc Sealant. For specific applications, the sound insulation performance at certain frequencies may be important. Contact the Technical Sales Department for guidance. Other high performance acoustic wall specifications are possible with masonry construction lined with Gyproc plasterboards. Contact the Technical Sales Department for details. Gyproc GypWall AUDIO provides up to 120 minutes fire protection to structural steel dependant upon the lining specification and steel section factor. Table 3 gives the fire protection periods for different configurations. Table 3 Fire protection to structural steel... Board Lining Fire Section factor type thickness resistance 1 A/V (Hp/A) mm mins m SoundBloc 2 x Up to 300 SoundBloc 2 x Up to 300 or Wallboard Plank + SoundBloc Up to 300 Plank + Fireline Up to 300 SoundBloc 3 x Up to Based on 4 sided profile exposure up to 300 A/V (Hp/A), with no vertical joints aligning with the column and boards not fixed to the column to maintain 10mm air space. Partition duty strength and robustness All the wall specifications given in Table 2 achieve a Severe duty rating calculated in accordance with BS 5234: Parts 1 & 2: The rating is a measure of the ability of the wall to meet the requirements of four strength and robustness tests: door slam, soft body impact, hard body impact, and stiffness. The Duty grade relates to the level of activity in adjacent areas and the degree of care likely to be exercised in them. Severe duty is appropriate where the adjacent space is intensively used by the public and others with little incentive to exercise care. It could be prone to vandalism and abnormally rough use. The requirements are for walls complete with their surface finishes where these are part of the wall specification. Other optional tests may also apply. Using the duty of a particular wall the designer can select a wall for its area of use (with due consideration for fire, sound, or thermal requirements). Refer to Gyproc GypWall, PERFORMANCE, for further information on duty rating. 176

6 T F E enquiries@gyproc.ie Table 4 Performance substantiation report Detail Gyproc Lining Isover Sound insulation (R) Performance board thickness Modular Roll 63Hz 125Hz 250Hz Rw substantiation type 1 mm mm db db db db report 1 SoundBloc 2 x A Wallboard 2 x A SoundBloc 2 x A Plank + SoundBloc A Plank + FireLine A SoundBloc 3 x A SoundBloc 3 x 15 2 x A SoundBloc 3 x 15 4 x x 100mm A stone mineral wool 6 SoundBloc 3 x 15 3 x x 100mm A stone mineral wool 7 SoundBloc 3 x 15 3 x x 100mm A stone mineral wool 1 For improved durability and impact resistance, the outer layer of Gyproc FireLine or Gyproc SoundBloc can be replaced with a layer of 15mm Gyproc DuraLine. DESIGN Refer to section 3.1 Introduction, for general considerations. Maximum heights The criteria to determine the recommended maximum partition heights given in Table 2 are based on limiting deflections of L/240 and L/125 at 200Pa, together with criteria within BS 5234: Parts 1 & 2: Cross-bracing Laboratory tests were carried out on walls without bracing. The results, however, are a realistic representation to site conditions in which Gyproc Fixing Channel cross-braces are fitted at the recommended 3600mm maximum centres, provided that appropriate measures are taken on site to eliminate flanking sound transmission. Test evidence is provided by British Gypsum report ATR 1299 where site tests on a large Multiplex cinema wall achieved comparable performance to the equivalent specification tested in the laboratory without bracing. Some acoustic designers prefer the option of a resilient acoustic brace. The Gyproc GAB3 Acoustic Brace has been shown by test not to downgrade acoustic performance in laboratory conditions. As a result of the mechanics of this brace, however, fixing centres should be reduced from 3600mm to 3300mm, staggered by 1200mm. Maximum recommended wall heights will be reduced refer to Table 2. Cavity barriers Stone mineral wool cut neatly to fit across the cavity will form a suitable closure. Service penetrations Penetrations of fire resistant or sound insulating constructions for services need careful consideration to ensure that the performance of the element is not downgraded, and also that the services themselves do not act as the mechanism of fire spread or sound transmission. Deflection heads Performance details apply to fixed head constructions. If deflection is required to be accommodated, contact the Technical Sales Department for suitable detailing. Deflection heads, by definition, must be able to move and therefore, achieving an airtight seal is difficult. Inevitably, this will have a detrimental effect on the acoustic performance of any wall which incorporates deflection at the head. The approach shown in section 4.1 Gyproc GypWall STAGGERED could be considered to minimise loss of performance. In most cases, a suspended ceiling will also assist in minimising loss of performance. Fixing floor and ceiling channels The channels must be securely fixed with two rows of staggered fixings (fixings at 600mm maximum centres and 25mm in from the flange in each row). If the floor is uneven a 38mm thick timber sole plate equal to the width of the channel should be used. If the concrete or screeded floor is new, consideration should be given to the installation of a damp proof membrane between the floor surface and the channel or sole plate. 177

7 Control joints Control joints may be required in the partition to relieve stresses induced by expansion and contraction of the structure. The location of control joints is at the discretion of the specifier. It is recommended that they coincide with movement joints within the surrounding structure. Installation of services The installation of services should be carried out in accordance with all available standards, guidelines and recommendations. Cables should be protected by conduit, or other suitable precautions taken, to prevent abrasion when they pass through the metal frame. Switch boxes or socket outlets should be avoided - however, where this is not possible contact the Technical Sales Department for further guidance. Door openings Any openings will require careful detailing if the acoustic performance is to be maintained. Specialist heavy acoustic doorsets may require additional support. Contact the Technical Sales Department for guidance. Fixtures Lightweight fixtures can be made directly to the linings. Medium weight fixtures can be made to Gyproc Fixing Channel. Heavy fixtures should be made to independent framing with the extra supports installed at the frame erection stage. Ceramic tiling Ceramic tiles up to 12.5mm thick with a maximum weight of 32kg/m 2 can be applied using thin bed adhesives (usually 3mm thick). Stud centres will normally require closing down. Refer to section Ceramic tiling. Board finishing Refer to section Finishing Coat Plasters, section Jointing, and section Decorative effects. Estimating The estimated construction time is 0.5m 2 / man hour (nominal 6m high wall) ready for finishing. CONSTRUCTION DETAILS For detailing to suit project requirements, contact the Technical Sales Department. The stud bracing details are shown below (see Figs 1a and 1b). Fig 1a Stud bracing using Gyproc Fixing Channel Fig 1b Stud bracing using Gyproc Acoustic Brace GAB3 178

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