Selecting floors and ceilings

Transcription

1 floors and ceilings

2 floors and ceilings Introduction 9 Solutions - key systems 9 Solutions for concrete floors 9 - Dense slab 9 This section will guide you through the regulatory requirements for airborne and impact sound insulation between spaces, and recommend specifications to achieve them. - Precast concrete planks 9 - Trapezoidal decking 9 Thermal lining floor systems 9 Solutions for timber floors 98 Membrane solutions 99 Construction details Drywall Academy Tel:

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4 Introduction Noise generated by impacts on a floor structure can be transmitted vertically into spaces directly below in the form of impacts. The movement of people, e.g. footsteps, on the floor above can be disruptive and interfere with the patient recovery taking place in the receiving room. Through the use of British Gypsum floor treatments and acoustically engineered ceiling systems, the levels of impact noise can be controlled. HTM 08-0, section.0 states that impact noise should be controlled at source wherever possible, and that planning should separate heavy traffic corridors from sensitive spaces such as wards. HTM 08-0 requires a weighted standardised impact sound pressure level (L ntw ) of db as a maximum value for floors over noise sensitive areas. To simplify the process of determining both the required impact (L n,w ) and airborne (R w ) sound insulation performances, British Gypsum has developed an easy-to-use performance calculator which is located in the back cover of this publication. Simply place the disk in your computer and follow the guidance instructions to determine the required L n,w and R w for all of the floors and ceilings on your healthcare project. British Gypsum recommends that a qualified acoustic consultant be appointed to check all acoustic specifications, details and calculations. The WHITE BOOK Health sector guide Healthcare acoustic calculators British Gypsum floor and ceiling system performances are based on laboratory impact sound insulation data measured in terms of the weighted normalised impact sound pressure level, L n,w. In order to determine the floor specification that would achieve the requirements set out in HTM 08-0, it is necessary to account for less favourable mounting conditions and flanking noise transmission by applying a correction factor to the L n,w performance. This is assumed to be db. 9 Drywall Academy Tel:

5 Solutions The following pages detail solutions for concrete and timber floor types used in the construction of healthcare buildings. Solution Page Concrete floors 90 Dense slab 90 Pre-cast concrete planks 9 Trapezoidal decking 9 Timber floors 9 Membrane solutions 9 Concealed grid MF suspended ceiling Key facts Monolithic appearance CasoLine MF system Acoustic hangers provide option of resilient suspension Durable ceiling lining Ventilation ducts and other services accommodated in plenum Access panels provide services access Easy to create bulkheads and change levels bgtechnical.enquiries@bpb.com 9

6 Solutions for concrete floors - dense slab Minimum mm screed. Dense concrete minimum kg/m. CasoLine MF ceiling suspended beneath to give a 0mm cavity. 80mm Isover Modular Roll in cavity. Linings as in table. Minimum mm screed. Dense concrete minimum kg/m. CasoLine MF ceiling suspended beneath to give a 0mm cavity. 80mm Isover Modular Roll in cavity. Linings as in table. Table. - CasoLine MF Detail Board Available Ceiling lining Sound insulation System type with ACTIVair thickness R w (Airborne) L n,w (Impact) reference technology mm db db SoundBloc x. C000 FireLine x. 0 C000 These performances are estimates based on the guidelines given in BS 8: 999 and similar constructions tested by British Gypsum. 0 minutes fire resistance is provided by Gyproc FireLine. For fire performance of the system please contact your concrete block supplier. These systems have an ACTIVair board option available for formaldehyde control to improve indoor air quality. Alternatively, all systems can be skim finished with Thistle PureFinish which contains ACTIVair technology. Refer to the indoor air quality section in Background and theory. NB NB Concrete floors are inherently fire resisting and don t usually require a contribution from a ceiling lining. Advice should be sought from the supplier for fire resistance provided by the concrete. The ceiling cavity is the distance from the underside of the structural soffit to the back of the plasterboard ceiling lining. 9 Drywall Academy Tel:

7 Solutions for concrete floors - precast concrete planks Screed, pre-cast concrete planks (00kg/m ). CasoLine MF ceiling suspended beneath to give a 0mm cavity. Linings as in table. Screed, pre-cast concrete planks (00kg/m ). CasoLine MF ceiling suspended beneath to give a 0mm cavity. 80mm Isover Modular Roll in cavity. Linings as in table. Table. - CasoLine MF and GypFloor SB Detail Board Available Ceiling lining Concrete plank Concrete Sound insulation System type with ACTIVair thickness thickness plank weight R w (Airborne) L n,w (Impact) reference technology mm mm kg/m db db SoundBloc x C000 SoundBloc x C000 These systems have an ACTIVair board option available for formaldehyde control to improve indoor air quality. Alternatively, all systems can be skim finished with Thistle PureFinish which contains ACTIVair technology. Refer to the indoor air quality section in Background and theory. NB NB The fire resistance performance is provided by the concrete plank, advice should be sought from the supplier. The ceiling cavity is the distance from the underside of the structural soffit to the back of the plasterboard ceiling lining. bgtechnical.enquiries@bpb.com 9

8 Solutions for concrete floors - trapezoidal decking 00mm thick concrete slab (,00 kg/m ). Steel decking sheets. CasoLine MF ceiling suspended beneath to give a 0mm cavity. 80mm Isover Modular Roll in cavity. Linings as in table. Table. - CasoLine MF Detail Board Available Ceiling lining Concrete slab Sound insulation System type with ACTIVair thickness density R w (Airborne) L n,w (Impact) reference technology mm kg/m db db SoundBloc x. 00 C000 These systems have an ACTIVair board option available for formaldehyde control to improve indoor air quality. Alternatively, all systems can be skim finished with Thistle PureFinish which contains ACTIVair technology. Refer to the indoor air quality section in Background and theory. NB NB The fire resistance performance is provided by the trapezoidal decking, advice should be sought from the supplier. The ceiling cavity is the distance from the underside of the structural soffit to the back of the plasterboard ceiling lining. 9 Drywall Academy Tel:

9 Thermal lining floor systems Glasroc F SOFFITLINE Typically used in semi-exposed environments, where perimeters are open to the elements, Glasroc F SOFFITLINE provides a high performance and durable soffit lining that limits heat loss from the building above. Glasroc F SOFFITLINE combines all the benefits of Glasroc F MULTIBOARD - a superior quality, glass fibre reinforced gypsum board, with a high performance, foil-backed phenolic foam. Glasroc F SOFFITLINE is the ideal solution for car parks and basements where its unrivalled and exceptionally smooth Glasroc F MULTIBOARD surface finish allows the panels to be left undecorated. The CFC and HCFC-free phenolic foam with foil backing enables high standards of thermal insulation to be achieved at minimal thickness, which makes all the difference when headroom is at a premium. The foil backing also acts as an integral vapour control layer. Glasroc F SOFFITLINE is easy to handle and quick and simple to install. It can be fixed to the underside of semi-exposed soffits in three ways: Direct to concrete soffit fix Fixing via metal framing supports Fixing via timber batten supports Direct to concrete soffit fix is predominantly used in environments where there is very little floor to soffit height, but the advantages of frame fixing far outweigh those of direct soffit fixing. Primarily frame fixing dramatically reduces the cost of installing Glasroc F SOFFITLINE. It creates a low emissivity air space which contributes to the thermal performance needed, while reducing the board thickness necessary to achieve the required performance levels. This decrease in thickness constitutes an average cost saving of 0% when compared to direct fixing. Glasroc F SOFFITLINE has superior fixing and handling characteristics and is also resistant to moderate impact and on-site damage. The surface of Glasroc F MULTIBOARD has good light reflectance properties (>0%) making it the best solution for use in public areas, such as car parks, where ambient lighting is used. key benefits Class 0 / Euroclass B CFC and HCFC-free High impact resistance High quality surface finish Good light reflectance Integral vapour control layer Unaffected by temporary exposure to moisture Simple and quick to install Warranted performance Ideal for semi-exposed situation High thermal efficiency Can be left undecorated Fixing direct to the soffit Glasroc F SOFFITLINE can be directly fixed to the underside of semi-exposed soffits using proprietary anchors at 00mm centres at the edges and in the field of the board. When fixing direct to the soffit the length of the proprietary anchors used should be determined by the anchor manufacturers recommendations concerning loadbearing capacity and suitability of background. Fixing to concrete soffit with metal framing supports Locate Gypframe MF Ceiling Section at 00mm centres. Fix to the soffit using two suitable fixings spaced at 00mm centres. Fix Glasroc F SOFFITLINE boards at right angles to the MF section using Gyproc Drywall Screws of sufficient length to allow a nominal 0mm penetration into the metal. Insert screws at 00mm centres at the edges and in the field of the board. bgtechnical.enquiries@bpb.com 9

10 Solutions for timber floors CasoLine MF ceiling suspended beneath 9 x mm timber joists at 00mm centres with t&g chipboard flooring using Gypframe Acoustic Hangers to give mm cavity. 80mm Isover Modular Roll in cavity. Linings as in table. 8mm chipboard and one layer of Gyproc Plank on Gypframe 0 S Steel Battens on mm OSB subdeck. CasoLine MF ceiling, incorporating Gypframe Acoustic Hangers, to give 8mm cavity. 00mm Isover APR 00 in the cavity. Linings as in table. Floating floor laid over joists. CasoLine MF ceiling suspended beneath 9mm x mm timber joists at 00mm centres to give mm cavity. 80mm Isover Modular Roll in cavity. Linings as in table. Separating sub-joist floor comprising of a floating floor laid over timber joists (minimum mm) at 00mm centres. 00mm Isover APR 00 in the cavity. Linings as in table. Floating floor laid over 8 x 9mm (minimum) timber joists at 00mm centres. Gypframe RB Resilient Bars fixed to underside of joists at 0mm centres with ceiling linings (see table) fixed into the bars only. 00mm Isover SPACESAVER READY-CUT in the cavity. CasoLine MF ceiling suspended beneath basic floor (ceiling removed) to give mm cavity. 00mm Isover SPACESAVER READY-CUT laid on ceiling boards. Linings as in table. Table. - CasoLine MF Detail Board Available Ceiling lining Floor Sound insulation System type with ACTIVair thickness depth R w (Airborne) L n,w (Impact) reference technology mm mm db db 0 minutes fire resistance EN BS SoundBloc x. 0 C00 SoundBloc x. 0 C00 0 minutes fire resistance EN BS FireLine x. 0 C00 SoundBloc x 9 0 C00 SoundBloc x 8 0 C00 SoundBloc x Variable 8 C000 SoundBloc x C minutes fire resistance EN BS FireLine x 9 C000 Comprising walking surface of 8mm t&g chipboard flooring, spot-bonded with Gyproc Sealant at 00mm centres to a substrate of Gyproc Plank laid on mm Isover Sound Deadening Floor Slabs (Rigid Grade, laid on a minimum of mm wood-based sheet sub-deck nailed to the joists). Normal fixing centres for Gypframe MF Ceiling Section and Gypframe MF Primary Support Channel (0mm and 00mm respectively). Suspension method is Gypframe MF8 Strap Hangers or Gypframe GA Steel Angle unless otherwise stated. These systems have an ACTIVair board option available for formaldehyde control to improve indoor air quality. Alternatively, all systems can be skim finished with Thistle PureFinish which contains ACTIVair technology. Refer to the indoor air quality section in Background and theory. Gypframe MF Primary Support Channel at 900mm centres NB The ceiling cavity is the distance from the underside of the walking surface to the back of the plasterboard ceiling lining Drywall Academy Tel:

11 Membrane solutions CasoLine MF ceiling suspended beneath structure. Linings and insulation as in table. Table. - Fire protection to floor or roof cavity above suspended ceiling Detail Board Ceiling lining Insulation MF support MF support System type thickness centres centres reference mm mm mm 0 minutes fire resistance BS WallBoard x. 00mm Isover SPACESAVER 0 00 C00 READY-CUT 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. Normal fixing centres for Gypframe MF Ceiling Section and Gypframe MF Primary Support Channel (0mm and 00mm respectively) suspension method is Gypframe MF8 Strap Hangers or Gypframe GA Steel Angle unless otherwise stated. bgtechnical.enquiries@bpb.com 99

12 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 8 Max. 0mm Max. 00mm Max. 0mm Max. 00mm Max. 0mm Perimeter parallel to Gypframe MF Ceiling Section Perimeter perpendicular to Gypframe MF Ceiling Section alternative clip-fixed alternative clip-fixed 9 9 Gyproc plasterboard or Glasroc F specialist board Gypframe MF Ceiling Section Gypframe MF Perimeter Channel Gypframe MF Primary Support Channel Gypframe MF8 Strap Hanger or Gypframe GA Steel Angle Gyproc Wafer Head Jack-Point Screw Gypframe MF Nut and Bolt 8 9 Gypframe MF Soffit Cleat Gypframe MF9 Connecting Clip 00 Drywall Academy Tel:

13 Construction details Reflected ceiling plan single layer 8 Floating perimeter screw-fixed 9 CasoLine MF and CasoLine GRID junction screw-fixed Max. 0mm Max. 0mm 8 8 Gyproc plasterboard or Glasroc F specialist board Gypframe MF Ceiling Section Gypframe MF Perimeter Channel Gypframe MF Primary Support Channel Gypframe MF8 Strap Hanger or Gypframe GA Steel Angle Gyproc Wafer Head Jack-Point Screw Wall angle Ceiling tile bgtechnical.enquiries@bpb.com 0

14 Construction details 0 Suspension from timber joist using Gypframe Acoustic Hangers Sloping change of level screw-fixed 0 mm 9 8 Gyproc Profilex Access Panel installation Gyproc plasterboard or Glasroc F specialist board Gypframe MF Ceiling Section Gypframe MF Perimeter Channel Gypframe MF Primary Support Channel Gypframe MF8 Strap Hanger or Gypframe GA Steel Angle Gyproc Wafer Head Jack-Point Screw Gypframe MF Nut and Bolt 8 Gypframe MF Soffit Cleat 9 Gypframe Acoustic Hanger 0 M bolt and locking nut (by others) Timber joist floor Isover insulation Gypframe GA Steel Angle Gyproc Profilex Access Panel 0 Drywall Academy Tel:

15 Construction details Typical batten layout Service installation 00mm Max. 0mm NB Services are incorporated within GypFloor SB by allowing a gap in the battens. Service layout should be designed to maintain 00mm maximum spacing between battens. Typical layout (9mm x 00mm x 00mm Gyproc Plank on battens at 00mm centres) Typical layout (00mm x 00mm tongue and groove chipboard on Gyproc Plank) 8 NB Apply glue to the chipboard joints (as recommended by the chipboard manufacturer) Loadbearing partitions 8 Non-loadbearing partitions NB Loadbearing partitions should be erected directly onto the sub-floor. NB Non-loadbearing partitions can be erected onto GypFloor SB. Provision should be made in the layout to allow a Gypframe Steel Batten beneath the partition to give support and a fixing ground. 8 Gypframe Steel Batten 0mm gap between Gypframe Steel Batten and room perimeter mm gap between battens mm gap between services and battens Gyproc Plank Board edges supported by a batten Gypframe SB Flanking Strip Chipboard 9 Timber joist 0 Timber sub-deck Gyproc plasterboard Timber stud Gypframe AcouStud Gypframe Floor & Ceiling Channel Gypframe Steel Batten providing support for fixing channel Skirting NB Gypframe SIF Floor Screws are recommended (at 00mm centres) for fixing the walking surface to the battens. This prevents movement of the chipboard walking surface, particularly in rooms of a larger area (>0m ). bgtechnical.enquiries@bpb.com 0

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