book 4_jan09.qxda23 GypWall Staggered v1.qxd by spz45064

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									                              Gyproc GypWall™ STAGGERED
                                                                                4.1
                                           Staggered stud partition




                INTRODUCTION


               Gyproc GypWall STAGGERED staggered stud partition is a
               non-loadbearing partition which provides very high levels
               of sound insulation up to and exceeding separating wall
               standard. Subject to Local Authority approval, the
               partition can be specified in all types of dwellings in both
               new-build and refurbishment. In public and commercial
               developments it can be used for space division within
               critical areas of offices, hotels, schools, hospitals,
               recreational complexes, shops, and conference centres. In
               industrial units it can be used to isolate machinery noise. In
               refurbishment work on residential units it can be used as a
               sound resisting, space saving partition between dwellings
               (subject to Local Authority approval).


               The system is based on a Gyproc I Stud framework in
               which alternate studs are staggered within the floor and
               ceiling channels. Two options are available – 60 I 70 studs
               retained in 72mm track (the 60/72 series), or 92 I 90 studs
               retained in 148mm track (the 92/148 series). Moy Acoustic
               Roll is included in the cavity, and the framework is lined on
               both sides with Gyproc SoundBloc.


               Gyproc GypWall STAGGERED staggered stud partition is a
               cost-effective, versatile, and robust partition. Its sound
               performance is particularly impressive when compared to
               equivalent masonry walls or to other lightweight
               partitions of similar width.




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       Gyproc GypWall™ STAGGERED
4.1
       Staggered stud partition




       INSTALLATION




      Gypframe Floor & Ceiling Channel is fixed to the floor and
      soffit. Gypframe ‘I’ Studs are fitted vertically into the
      channel sections and held in place by spacer clips.
      Alternate studs are staggered (offset). As the spacer clips
      are friction fitted this allows for stud adjustment during
      boarding. Gypframe ‘C’ Studs are fixed at abutments. Moy
      Isover insulation is fitted between studs and the perimeter
      sealed using Gyproc Sealant.
      Boards are screw-fixed to alternate offset studs to form the
      lining. Horizontal board end joints of face layer boards
      should be backed with Gypframe GFS1 Fixing Strap or
      Gypframe GFT1 Fixing ‘T’.




      For full installation details, refer to the Installation Guide at www.gypsum.ie




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                                                                                                                                      Gyproc GypWall™ STAGGERED
                                                                                                                                                                                    4.1
                                                                                                                                                  Staggered stud partition




Health and Safety                                                                                                      Gyproc Drywall Screws
Safety Data Sheets for all Gypsum Industries’ products are
available to download from our website                                                                                 Gyproc Jack-Point Screws
www.gypsum.ie, or via the Technical Sales Department.
                                                                                                                       Gyproc GFS1 Fixing Strap or Gyproc 99 FC 50 Fixing
Environmental                                                                                                          Channel
Gyproc GypWall STAGGERED staggered stud partition is
unsuitable for use in areas subject to continuously damp or                                                            Moy Acoustic Roll
humid conditions.
                                                                                                                       Gyproc Sealant – if required, sealing airpaths for optimum
Plasterboards are not suitable for use in temperatures                                                                 sound insulation.
above 49ºC but can be subjected to freezing conditions
without risk of damage.                                                                                                Gyproc Edge Beads – protecting and enhancing board
                                                                                                                       edges.
  COMPONENTS
                                                                                                                       Gyproc Control Joint – to accommodate structural
Gyproc plasterboards                                                                                                   movement.

  Table 1 Dimensions                                                                                                   Gyproc FireStrip – for sealing deflection heads.

Type of board                                              Thickness                       Width                       Gyproc jointing materials – for a seamless finish.
                                                           mm                              mm
....................................................................................................................
                                                                                                                       Gyproc Skimcoat, Carlite Finish or Gyproc Board
SoundBloc                                                  12.5, 15                        1200
....................................................................................................................   Finish – for providing a plaster finish.


Gyproc metal sections                                      60 / 72                         92 / 148
                                                           combination                     combination

I studs                           Code                     60 I 70                         92 I 90

                                  Width                    60mm                            92mm
                                  Length                   3600, 4200mm                    3600, 5000,
                                                                                           6000mm



C studs                           Code                     70 S 50                         146 S 50

                                  Width                    70mm                            146mm
                                  Length                   in appropriate                  in appropriate
                                                           lengths                         lengths



Floor and                         Code                     72 C 50                         148 DC 60
Ceiling Channel
                                  Width                    72mm                            148mm
                                  Length                   3600mm                          3600mm




Spacer Clips                      Code                     SC1                             SC2




Gyproc Internal                   Code GA5
Fixing Angle
                                  90º angle, prime dimensions 60mm x 60mm




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        Gyproc GypWall™ STAGGERED
4.1
        Staggered stud partition




        PERFORMANCE

      Refer to section 3.1 Introduction, for general considerations.

        Table 2 Dimensions, weights, and performance 1




                                         60 / 72 Series                                                                                                                            92 / 148 Series


       Two rows of Gyproc I studs (60 I 70) in Gyproc Floor and                                                                                 Two rows of Gyproc I studs (92 I 90) in Gyproc Floor and
       Ceiling Channel (72 C 50). SC1 Spacer Clips and alternate                                                                               Ceiling Channel (148 DC 60). SC2 Spacer Clips and alternate
           studs staggered in the channel at 300mm centres.                                                                                         studs staggered in the channel at 300mm centres.
            25mm or 50mm Moy Acoustic Roll in the cavity.                                                                                            25mm or 50mm Moy Acoustic Roll in the cavity.
                        Gyproc linings as below.                                                                                                                Gyproc linings as below.

      ..............................................................................................................................................................................................................................................
      Series              Board detail                                Nominal              Approx.             Rec’d            Fire                         Laboratory sound                          Partition              Performance
                                                                         overall           weight              max.             resistance4             insulation 100 - 3150Hz                        duty3               substantiation
                                                                     thickness                                 height2                                 Moy Acoustic Insulation                                                           report
                                                                                                                                                            25mm                 50mm
                                                                              mm           kg/m2               mm               mins                        Rw dB                Rw dB
      ..............................................................................................................................................................................................................................................
      60 / 72             One layer of 15mm                                   102          29                  3300             30                             49                   52                 Medium              A233001 / 021
                          Gyproc SoundBloc each side



      92 / 148            One layer of 15mm                                   178          29                  5400             30                             53                   55                 Medium              A233006 / 026
                          Gyproc SoundBloc each side
      ..............................................................................................................................................................................................................................................

      60 / 72            Two layers of 12.5mm                                 122          46                  3600            60                             57                   59                  Severe              A233002 / 022
                         Gyproc SoundBloc each side



      92 / 148            Two layers of 12.5mm                                198          46                  5700             60                             61                   62                 Severe              A233007 / 027
                          Gyproc SoundBloc each side
      ..............................................................................................................................................................................................................................................

      60 / 72            Two layers of 15mm                                   132          57                  3900            90                             59                   61                  Severe              A233003 / 023
                         Gyproc SoundBloc each side



      92 / 148            Two layers of 15mm                                  208          57                  6000             90                             62                   63                 Severe              A233008 / 028
                          Gyproc SoundBloc each side
      ..............................................................................................................................................................................................................................................
      1 The fire resistance and sound insulation performances are for imperforate partitions 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 throughout, and the Company’s fixing recommendations are strictly observed. Any variation in the specifications should be checked with
      Gypsum Industries.
      2 Based on a limiting deflection of L/240 at 200Pa. If greater heights are required, refer to DESIGN section. For heights between 4200mm and
      8000mm, Deep Flange Floor and Ceiling Channel (DC) should be used at the head and base. Where special design requirements exist,
      consult the Technical Sales Department for guidance.
      3 Refer to Gyproc GypWall, PERFORMANCE, for further information on duty ratings.

      4 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.




  4   For current information, refer to www.gypsum.ie                                                                                                                                                                     January 2009
                                                                                Gyproc GypWall™ STAGGERED
                                                                                                                                  4.1
                                                                                             Staggered stud partition




Fire protection                                                  DESIGN
For reaction to fire classifications for Gyproc and Glasroc
boards please refer to Section 2.1 .
                                                                Refer to section 3.1 Introduction, for general
                                                                considerations.
Fire resistance
The fire resistances given in Table 2 are for imperforate
                                                                Maximum heights
partitions tested to BS 476: Part 8: 1972 or BS 476: Part 22:
                                                                The criteria to determine the recommended maximum
1987 or assessments based on these tests. Partitions were
                                                                partition heights are based on a limiting deflection of
tested without timber sole plates.
                                                                L/240 at 200Pa, together with criteria within
                                                                BS 5234: Parts 1 & 2: 1992. Greater heights can be achieved
Sound insulation
                                                                under different criteria. Contact the Technical Sales
The Rw ratings given in Table 2 are for imperforate
                                                                Department for guidance.
partitions and have been tested in accordance with
BS EN ISO 140-3: 1995, and rated in accordance with
                                                                Cavity barriers
BS EN ISO 717-1: 1997 or assessments based on these tests.
                                                                Where a cavity barrier is required, a rock mineral wool strip
                                                                cut neatly to fit across the cavity forms a suitable closure.
Airtightness is essential for optimum sound insulation.
While most junctions will be sealed by standard jointing
                                                                Acoustic performance
materials, gaps at the base of the partition and other small
                                                                The partition achieves high levels of sound insulation by
airpaths can be sealed using Gyproc Sealant.
                                                                virtue of the mechanical separation between the two rows
                                                                of studwork. It is important, therefore, that this isolation is
Partition duty – strength and robustness
                                                                maintained, and that services, fixtures, etc, do not form a
The duty ratings given in Table 2 have been calculated in
                                                                bridge between the two sets of linings.
accordance with BS 5234: Parts 1 & 2: 1992. The rating is a
measure of the ability of the wall to meet the requirements
                                                                Fixing floor and ceiling channels
of four strength and robustness tests: door slam, soft body
                                                                The channels must be securely fixed to the surrounding
impact, hard body impact, and stiffness. Grades, e.g.
                                                                structure at 600mm maximum centres. 148mm Gyproc
‘Medium Duty’, relate to the level of activity in adjacent
                                                                Channels must be fixed with two rows of staggered fixings,
areas and the degree of care likely to be exercised in them.
                                                                each row at 600mm centres, and each fixing 25mm in from
The requirements are for walls complete with their surface
                                                                the flange. If necessary, additional provision should be
finishes where these are part of the wall specification.
                                                                made to provide positive fixing points.
Other optional tests may also apply.

                                                                If the floor is uneven a 38mm thick timber sole plate equal
Using the duty of a particular wall the designer can select a
                                                                to the width of the channel should be used. If the concrete
wall for its area of use (with due consideration for fire,
                                                                or screeded floor is new, consideration should be given to
sound, or thermal requirements).
                                                                the installation of a damp proof membrane between the
                                                                floor surface and the channel or sole plate.


                                                                Deflection heads
                                                                Partition head deflection designs may be necessary to
                                                                accommodate dead load or live load deflections in the
                                                                supporting floor and/or roof construction. This can be in
                                                                the form of live loads on intermediate floors creating a +–
                                                                condition, or a simple minus deflection for dead loads on
                                                                the structural floors. Deflection heads may also be required
                                                                at the underside of roof structures subjected to positive
                                                                and negative pressures. Gyproc GypWall STAGGERED
                                                                staggered stud partitions can incorporate head deflection
                                                                designs to accommodate supporting structural deflections
                                                                with only a slight reduction in sound insulation
                                                                performance (1 - 2dB). See Figs 1 and 2.




January 2009                                                               For current information, refer to www.gypsum.ie        5
       Gyproc GypWall™ STAGGERED
4.1
       Staggered stud partition




      Deflection heads (cont’d)                                         Control joints
      Deflection heads, by definition, must be able to move and         Control joints may be required in the partition to relieve
      therefore, achieving an airtight seal is difficult. Inevitably,   stresses induced by expansion and contraction of the
      this will have a detrimental effect on the acoustic               structure. The location of the control joints is at the discretion
      performance of any wall which incorporates deflection at          of the specifier. It is recommended that they coincide with
      the head.                                                         movement joints within the surrounding structure.


      Service penetrations                                              Ceramic tiling
      Penetrations of fire resistant constructions for services need    Ceramic tiles up to 12.5mm thick with a maximum weight
      careful consideration to ensure that the integrity of the         of 32kg/m2 can be applied using thin bed adhesives (usually
      element is not impaired, and also that the services               3mm thick). Stud centres will normally require closing
      themselves do not act as the mechanism of fire spread.            down. Refer to section 2.3 - Ceramic tiling.
      It is important to use only those services and their
      installations which have been shown by fire test to be able       Board finishing
      to maintain the integrity of the construction.                    Refer to section 1.5 - Finishing Coat Plasters, section 2.2
                                                                        - Jointing, and section 2.4 - Decorative effects.
      The inclusion of service penetrations, socket boxes etc in a
      separating wall is not recommended as the sound                   Estimating
      insulation may be downgraded.                                     The estimated construction time is 2 - 2.5m2 / man hour
                                                                        (single layer partition) or 1.5 - 2.5m2 / man hour (double
      Installation of services                                          layer partition) ready for finishing.
      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 and socket outlets can be supported on
      brackets formed from Gyproc Fixing Channel or cut and
      bent channels fixed horizontally between the studs.


      Door openings
      Any openings will require very careful detailing if the
      acoustic performance of the partition 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 partition
      lining. Medium weight fixtures can be made to Gyproc
      Fixing Channel. Heavy fixtures should be made to
      independent timber framing which is installed at the frame
      erection stage. The timber member should be notched at
      the intermediate stud position. Any contact at this point
      will downgrade the acoustic performance of the partition.




  6   For current information, refer to www.gypsum.ie                                                                      January 2009
                                                                                        Gyproc GypWall™ STAGGERED
                                                                                                                                               4.1
                                                                                                       Staggered stud partition




  CONSTRUCTION DETAILS (60/72 series generally shown for purposes of illustration)



Fig 1 60 min fire-rated head detail1, 15mm                             Fig 2 60 min fire-rated head detail2, + 25mm
                                                                                                             –
downward deflection (2 x 15mm Gyproc SoundBloc                         deflection (2 x 15mm Gyproc SoundBloc linings) –
linings) – Scale 1 : 3                                                 Scale 1 : 3



     15mm
                                                                           25mm

     15mm                                                                                                                          25mm x
                                                                                                                                    75mm
                                                                                                                                   angle by
                                                                                                                                    others

                                                                           25mm



     15mm




                                                                           25mm




1 Firestop comprising Gyproc Plank with continuous line of Glasroc     2 Firestop comprising 50mm deep timber head plate with
FS FireStrip. Gyproc Deep Flange Head Channel suitably fixed           continuous line of Glasroc FS FireStrip. Head plate suitably fixed to
through firestop to soffit at 600mm centres                            soffit at 600mm centres. Gyproc EDC channel fixed to head plate at
                                                                       600mm centres
Important Notes
No fixings should be made through the boards into the flanges of the head channel. The arrow denotes the position of the uppermost
board fixings which should be made into Gyproc Fixing Strap.
Gyproc Angle or approved decorative trim (by others) should be fixed to the soffit either side of the partition as shown in order to
maintain the acoustic performance.
Where + deflection is a requirement, Gyproc SC1 or SC2 Spacer Clips must be prefixed to the I studs to avoid the risk of disengagement
        –
once deflection is taken up.



Fig 3 Head detail                                                      Fig 4 Base detail




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       Gyproc GypWall™ STAGGERED
4.1
       Staggered stud partition




       CONSTRUCTION DETAILS (cont’d)



      Fig 5 Corner junction                   Fig 6 Wall junction   Fig 7 T junction




                                                                                       Gypframe GA5
                                                                                       Internal Fixing Angle




      Fig 8 Plan detail (60 / 72 series)




      Fig 9 Plan detail (92 / 148 series)




      Fig 10 Clip attachment




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                                                    Notes




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