STAGGERED GypWall TM STAGGERED - Gyproc Ireland 4... · Choice of framing sizes to suit range of performance requirements Can achieve high levels of sound insulation up to Rw63dB

l Choice of framing sizes to suit range of

performance requirements

l Can achieve high levels of sound insulation

up to Rw63dB

l Up to 90 minutes fire resistance

l Satisfies BS 5234 strength and robustness

requirements up to Severe Duty

l Single layer or double layer board linings

l Uses ‘I’ stud framework to give a

robust partition

l De-coupled linings for high acoustic

performance, with space saving

partition widths

Key facts

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GypWallTM STAGGERED

GypWall STAGGERED is a lightweight, non-loadbearing

partition system which offers high levels of sound

insulation performance.

Subject to Local Authority approval, GypWall STAGGERED

can be used as the separating walls between residential

units, such as flats and apartments, to meet the

requirements of the national Building Regulations. The

system can also be specified in commercial and industrial

buildings to meet specific standards of sound insulating

performance in situations where space is at a premium.

GypWall STAGGERED consists of a Gyproc ‘I’ Stud

framework in which alternate studs are staggered within

the floor and ceiling channels to provide a degree of

separation from one face of the partition to the other. Two

options are available Gypframe 60I70 ‘I’ Studs staggered

within Gypframe 72mm Floor & Ceiling Channel (the 60/72

series), or Gypframe 92I90 ‘I’ Studs staggered within

Gypframe 148mm Floor & Ceiling Channels (the 92/148

series). Proprietary Gypframe Spacer Clips are used to retain

the studs within the Floor & Ceiling Channels. Isover

Acoustic Roll is included in the cavity and the staggered

stud framework is lined on both sides with Gyproc

SoundBloc.

Gypframe Floor & Ceiling Channel

Gypframe Spacer Clip

Gypframe 'I' Stud

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T 00353 1 629 8400 F 00353 1 623 7054 E [email protected]

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Gyproc board products

Gyproc SoundBloc

Thickness 12.5, 15mm

Width 1200mm

Gyproc DuraLine

Thickness 13.5, 15mm

Width 1200mm

Gypframe metal products

Gypframe 60 I 70 'I' Stud

Used with 72mm Gypframe Standard Floor

& Ceiling Channel to form 60/72 combination.

Gypframe 92 I 90 'I' Stud

Used with 148mm Gypframe Standard Floor

& Ceiling Channel to form 92/148 combination.

Gypframe 70 S 50 'C' Studs

Gypframe 146 S 50 'C' Stud

Gypframe Standard Floor & Ceiling Channels

60/72 Combination

Code 72 C 50

92/148 Combination

Code 148 C 50 148 DC 60

Gypframe metal sections

Gypframe SC1 Spacer Clip

(used in 60/72 combination).

Gypframe SC2 Spacer Clip

(used in 92/148 combination).

Gypframe GA5 Internal Fixing Angle

Gypframe GFS1 Fixing Strap

Gypframe GFS1 Fixing Strap

Gypframe 99 FC 50 Fixing Channel

Gypframe GA6 Splayed Angle

For splayed corners.

Gypframe GFT1 Fixing 'T'

Fixing and finishing products

Gyproc Drywall Screws

For fixing boards to stud framing up to

0.79mm thick.

Gyproc Jack-Point Screws

For fixing boards to stud framing 0.8m

thick or greater and ‘I’ studs greater than

0.55mm thick.

Gyproc jointing materials

For seamless jointing.

Gyproc Sealant

Sealing airpaths for optimum

sound insulation.

Gyproc edge beads

Protecting and enhancing board edges

and corners.

Gyproc Control Joint

To accommodate structural movement.

Gyproc FireStrip

For fire-stopping deflection heads.

Gyproc Skimcoat, Gyproc Carlite Finish

or Gyproc Board Finish

Providing a plaster finish.

Isover Acoustic Roll

For enhanced acoustic performance.

COMPONENTS

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INSTALLATION

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

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.

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’.

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PERFORMANCE

Environmental

Gyproc GypWall STAGGERED staggered stud partition 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 for Gyproc and Glasroc

boards please refer to Section .

Fire resistance

The fire resistances given in Table 2 are for imperforate

partitions tested to BS 476: Part 8: 1972 or BS 476: Part 22:

1987 or assessments based on these tests. Partitions were

tested without timber sole plates.

Sound insulation

The Rw 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: 1997 or assessments based on these tests.

Airtightness is essential for optimum sound insulation.

While most junctions will be sealed by standard jointing

materials, gaps at the base of the partition and other small

airpaths can be sealed using Gyproc Sealant.

Partition duty – strength and robustness

The duty ratings given in Table 2 have been calculated in

accordance with BS 5234: Parts 1 & 2: 1992. 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.

Grades, e.g. ‘Medium Duty’, relate to the level of activity in

adjacent areas and the degree of care likely to be exercised

in them. 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).

DESIGN

Refer to section 3.1 - Introduction, for general

considerations.

Maximum heights

The criteria to determine the recommended maximum

partition heights are based on a limiting deflection of

L/240 at 200Pa, together with criteria within

BS 5234: Parts 1 & 2: 1992. Greater heights can be achieved

under different criteria. Contact the Technical Sales

Department for guidance.

Cavity barriers

Where a cavity barrier is required, a rock mineral wool strip

cut neatly to fit across the cavity forms a suitable closure.

Acoustic performance

The partition achieves high levels of sound insulation by

virtue of the mechanical separation between the two rows

of studwork. It is important, therefore, that this isolation is

maintained, and that services, fixtures, etc, do not form a

bridge between the two sets of linings.

Fixing floor and ceiling channels

The channels must be securely fixed to the surrounding

structure at 600mm maximum centres. 148mm Gyproc

Channels must be fixed with two rows of staggered fixings,

each row at 600mm centres, and each fixing 25mm in from

the flange. If necessary, additional provision should be

made to provide positive fixing points.

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.

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.

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Deflection heads (cont’d)

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.

Service penetrations

Penetrations of fire resistant constructions for services need

careful consideration to ensure that the integrity of the

element is not impaired, and also that the services

themselves do not act as the mechanism of fire spread.

It is important to use only those services and their

installations which have been shown by fire test to be able

to maintain the integrity of the construction.

The inclusion of service penetrations, socket boxes etc in a

separating wall is not recommended as the sound

insulation may be downgraded.

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 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.

Control joints

Control joints may be required in the partition to relieve

stresses induced by expansion and contraction of the

structure. The location of the control joints is at the discretion

of the specifier. It is recommended that they coincide with

movement joints within the surrounding structure.

Ceramic tiling

Ceramic tiles up to 12.5mm thick with a maximum weight

of 32kg/m2 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 2 - 2.5m2 / man hour

(single layer partition) or 1.5 - 2.5m2 / man hour (double

layer partition) ready for finishing.

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PERFORMANCE

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 Isover Acoustic Roll in the cavity. 25mm or 50mm Isover 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 Isover Acoustic Insulation report

25mm 50mm

mm kg/m2 mm mins RwdB RwdB

..............................................................................................................................................................................................................................................

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


..............................................................................................................................................................................................................................................

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


92 / 148 Two layers of 12.5mm 198 46 5700 60 61 62 Severe A233007 / 027


..............................................................................................................................................................................................................................................

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


92 / 148 Two layers of 15mm 208 57 6000 90 62 63 Severe A233008 / 028


..............................................................................................................................................................................................................................................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.

Refer to section 3.1 Introduction, for general considerations.

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Fig 1 60 min fire-rated head detail1, 15mm

downward deflection (2 x 15mm Gyproc SoundBloc

linings) – Scale 1 : 3

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

Fig 2 60 min fire-rated head detail2, 25mm

deflection (2 x 15mm Gyproc SoundBloc linings) –

Scale 1 : 3

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1 Firestop comprising Gyproc Plank with continuous line of Glasroc

FS FireStrip. Gyproc Deep Flange Head Channel suitably fixed

through firestop to soffit at 600mm centres

2 Firestop comprising 50mm deep timber head plate with

continuous line of Glasroc FS FireStrip. Head plate suitably fixed to

soffit at 600mm centres. Gyproc EDC channel fixed to head plate at

600mm centres

Fig 3 Head detail Fig 4 Base detail

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.

15mm

15mm

15mm

25mm

25mm

25mm

25mm x75mm

angle byothers

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CONSTRUCTION DETAILS (cont’d)

Fig 5 Corner junction Fig 6 Wall junction

Fig 8 Plan detail (60 / 72 series)

Fig 9 Plan detail (92 / 148 series)

Fig 7 T junction

Fig 10 Clip attachment

Gypframe GA5Internal Fixing Angle

Documents

STAGGERED GypWall TM STAGGERED - Gyproc Ireland 4... · Choice of framing sizes to suit range of performance requirements Can achieve high levels of sound insulation up to Rw63dB