James Hardie Fire rated wall Technical specification
विज्ञापन
विज्ञापन
© Copyright 2014 James Hardie Australia Pty Ltd. ABN 12 084 635 558.
™ and ® denotes a trademark or registered mark owned by James Hardie Technology Limited
JHML112633
Fire and acoustically rated walls
Technical specification
AUSTRALIA JULY 2015
CONTENTS
1 INTRODUCTION
1.1 Application
1.2 Overview of typical James Hardie separating
wall system
2 INSTALLATION
2.1 General
2.2 Framing
2.3 Acoustic infill
2.4 Fasteners
2.5 Sheeting
2.6 Jointing systems
2.7 Caulking and sealing materials
2.8 Control joints
3 JUNCTION AND
3.1 General
3.2 Wall to ceiling junction
3.3 Wall to floor junction
3.4 Joining to existing masonry wall
3.5 Door trimming
3.6 Floor to wall coving in clean areas
3.7 Floor to wall junction at shower tray
3.8 Wall to bath junction
3.9 Internal corners
3.10 External corners
3.11 Service penetrations - general
3.12 Service penetrations - electrical services
3.13 Service penetrations - water services
3.14 Service penetrations - pipes
3.15 Service penetrations - fire dampers
4 RESIDENTIAL
CONSTRUCTION DETAILS
4.1 General
4.2 Timber framing and fixing requirements
4.3 Framing - two or three storey buildings
4.4 Villaboard lining fixing requirements
4.5 Fixing to achieve bracing
4.6 Plasterboard lining fixing requirements
4.7 Wet areas
4.8 Electrical penetrations
4.9 Steel frame separating walls
4.10 James Hardie separating wall alternative
4.11 External walls
5 DETAILS
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INTRODUCTION
1.1 APPLICATION
This manual provides the technical specification and construction details for James Hardie fire and acoustically rated walls, framed from timber or steel, for use in residential and commercial applications.
These fire and acoustically rated walls can be used to meet a wide range of performance specifications and service requirements. The right system for your application must be selected from the James Hardie ‘Fire and acoustically rated walls Design Manual’, which identifies applications such as: n n n n n n n
Separating walls in quality multi-residential construction
Separating walls in office buildings
External walls required to be fire resistant
Bathroom linings
Hospital corridor walls subject to trolley impact
Wall linings in transit areas and schools
Walls in security type buildings
In addition, the Design Manual sets out structural considerations for firerated and non-fire rated, loadbearing and non-loadbearing systems, providing required framing arrangements.
For internal partition walls, Villaboard® lining is the main component used. It can also provide significant bracing from the time of erection.
For external cladding applications, a range of James Hardie building products are available for fire and acoustically rated construction.
Refer to the James Hardie product installation manuals for details and specification on the use of these linings and claddings.
Finally, make certain that the as-built system satisfies the requirements of the BCA and the details presented in this literature.
If you are a specifier...
or other responsible party for a project, ensure the information in these specifications is appropriate for the application you are planning and that you undertake specific design and detailing for areas which fall outside the scope of these specifications.
If you are an installer...
ensure that you follow the design, moisture management and associated details and material selection provided by the designer and the relevant
James Hardie Installation Manuals.
Make sure your information is up to date
When specifying or installing James Hardie products, ensure you have the current manual. Additional installation information, warranties and warnings are available at www.jameshardie.com.au, www.accel.com.au or Ask James Hardie™ on 13 11 03.
NOTE
Throughout this manual, the following notations have been used:
FR Plasterboard: means fire resistant plasterboard.
W & FR Plasterboard: means water and fire resistant plasterboard.
WE VALUE YOUR FEEDBACK
To continuously improve the development of our products and systems, we value your input. Please send any suggestions, including your name, contact details, and relevant sketches to:
Ask James Hardie
™
Fax 02 9638 9535 [email protected]
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INSTALLATION
In the lead up to the May 2004 revision to the Building Code of Australia
(BCA), it became clear that occupiers of multi-residential properties are generally concerned about the amount of noise they experience. In quality residential construction, residents expect to hear almost no noise from the adjoining occupancy. To achieve this, it is necessary to design and construct separating walls with superior sound insulating properties.
The basic discontinuous system (See Figure 1) consists of two separate timber or steel frames, lined with Villaboard lining and fire resistant plasterboard to achieve specific fire ratings.
The wall can be completely covered by the base sheet, without interruption, to ensure the acoustic integrity of the system.
Using two separate frames further reduces impact sound transmission.
Depending on the thickness of Villaboard lining and fire resistant plasterboard used, James Hardie timber-framed systems can achieve a
FRL of up to 90/90/90 (eg System JH-235) and steel-framed systems up to 120/120/120 (System JH-416).
To achieve the required fire and acoustic performance, the separating wall must be installed in strict accordance with the recommendations in this manual and the BCA.
6mm Villaboard lining fixed horizontally
FR plasterboard fixed vertically
Polyester or fibreglass acoustic insulation blanket
Dual frame wall
Noggings at
1350 max.
centres
FIGURE 1 BASIC DETAILS OF THE JAMES HARDIE
DISCONTINUOUS WALL SYSTEM
2.1 GENERAL
The James Hardie Fire and acoustically rated walling systems must be installed in accordance with James Hardie current printed instructions, to achieve the acoustic and fire rated performance requirements specified in the contract documents.
2.2 FRAMING
2.2.1 General
James Hardie internal linings and external cladding can be fixed to either timber or light gauge domestic type steel framing. The framing used must comply with the relevant building regulations and standards and the requirements of this manual.
The studs must be spaced at not more than 600mm centres.
Dual frames should be spaced not less than 25mm apart, however, the spacing may be increased to 50mm to provide more bearing area to support trusses.
2.2.2 Timber
Use only seasoned timber. Unseasoned timber must not be used, as it is prone to shrinkage and can cause sheets to move.
‘Timber used for house construction must have the level of durability
appropriate for the relevant climate and expected service life and
conditions; that is exposure to insect attack or to moisture, which could
cause decay'.
Reference AS1684.2 ‘Residential Timber Framed Construction’.
The minimum stud width is typically 35mm. However, where butt jointing is used, the minimum stud width must be 38mm so as to properly accommodate the joint.
2.2.3 Steel
Studs must not be less than 38mm wide at butt joints. The minimum size for steel stud framing should be 64mm deep by 0.55mm base metal thickness (BMT). Steel framing must be designed in accordance with
AS/NZS 4600 ‘Cold Formed Steel Structures’. Steel sections shall be galvanised or zinc coated of 0.55 - 1.6mm BMT.
NOTE
For both timber and steel framing, larger sections than the minimum may be used. The use of larger sections will not affect FRL levels and Rw values will be at least the same as the values published for the smaller sections.
2.2.4 Noggings
Noggings must be provided for structural requirements and be spaced at no more than 1350mm. A row of noggings must be provided behind all horizontal sheet joints.
For high impact walls, additional noggings may be required where walls will be subject to high impact loading, refer to the Design Manual
Clause 4.6.3.
NOTE
The order of the linings is interchangeable.
CONSTRUCTION OF FIRE AND ACOUSTICALLY RATED WALLS TECHNICAL SPECIFICATION JULY 2015
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2.3 ACOUSTIC INFILL
Acoustic infill must be installed to ensure that a continuous sound barrier is formed between studs. Refer to the Design Manual, Clause 3.7.2.
Acoustic insulation may be in the form of blanket or batts. When using blanket, take care to avoid sagging of the blanket and do not leave any gaps. Where batts are used, ensure that sagging or gaps do not occur between batts and framing. Leaving any gaps will reduce the acoustic performance.
For ease of installation and to reduce the chance of gaps, James Hardie recommends the use of blankets to form a complete acoustic barrier. A simple method of installing the blanket is to drive nails or screws into the studs near the edge of the stud avoiding contact with the other frame.
Then hang the blanket on the nails or screws.
2.4.2 Steel frames
To select the correct screws for an internal application see Table 1.
* 25mm long streaker screws may be more suitable if the flange of the stud deflects excessively before the screw begins to penetrate.
† If overlaying 12mm Villaboard lining over 16mm plasterboard Ask
James Hardie™ on 13 11 03 for advice.
‡ When screw fixing 9mm or 12mm Villaboard lining to 0.55 - 0.75mm
BMT framing. Pre drilling or pre-dimpling may make screw fixing easier.
2.4.3 Timber frames
To select the correct nails an internal application see Table 2.
2.4 FASTENERS
2.4.1 Fastener Durability
Fasteners must have the appropriate level of durability required for the intended project. This is of particular importance in coastal areas, areas subject to salt spray and other corrosive environments.
Fasteners must be fully compatible with all other material that they are in contact with to ensure the durability and integrity of the assembly.
Contact fastener manufacturers for more information.
NOTE
For external fastener information refer to Section 4.11.4
TABLE 1: SCREW SELECTION - INTERNAL WALL APPLICATION
Steel Studs 0.55 - 0.75mm BMT
Product
Against frame 2nd layer
6mm Villaboard lining
9/12mm Villaboard lining
20mm long
®
Buildex FibreZIPS
®
30mm long
40mm long
®
Buildex FibreZIPS
®
40mm long
13/16mm FR plasterboard
® denotes a registered mark of Buildex
TABLE 2: NAIL SELECTION - INTERNAL WALL APPLICATION
Product
6mm Villaboard lining
9/12mm Villaboard lining
13/16mm FR plasterboard
Against frame
2.8 x 30 FC nails
2.8 x 30 FC nails
50mm plasterboard nails
Timber Studs
2nd layer
2.8 x 50 FC nails
2.8 x 50 FC nails
50mm plasterboard nails
NOTE
When nailing 9mm or 12mm Villaboard lining to timber framing, pre-drilling may make nailing easier.
Against frame
Steel Studs 0.8 - 1.6mm BMT
2nd layer
32mm HardiDrive screws 40mm HardiDrive screws
32mm HardiDrive screws
40mm HardiDrive screws
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CONSTRUCTION OF FIRE AND ACOUSTICALLY RATED WALLS TECHNICAL SPECIFICATION JULY 2015
2.5 SHEETING
2.5.1 General
To retain fire and acoustic values, you must pay particular attention to the installation of the sheeting. This involves following the prescribed method of sheeting and ensuring that all construction joints and gaps are filled when you have completed the sheeting installation.
The sheeting installation also provides a guide for the installation of the plasterboard. For further information on the installation of the plasterboard refer to plasterboard manufacturers’ fixing instructions.
For fire-rated systems, the order of the linings on a particular face of the wall my be interchanged.
Although the following clauses refer to Villaboard lining as the internal lining, other approved James Hardie internal linings may be used. Refer to Section 4.5 of the Fire and Acoustically Rated Walls Design Manual for more information.
NOTE
Separating walls exposed to the weather during construction must be covered with a sheet of plastic.
2.5.2 Fixing Villaboard lining to framing
When you are fixing only one layer of Villaboard lining, it is recommended that the Villaboard lining be fixed horizontally. For instructions on fixing only one layer of Villaboard lining, refer to the Villaboard lining Installation
Manual.
When the Villaboard lining will be installed over plasterboard, it is recommended that the Villaboard lining be installed vertically.
This will facilitate installation of the plasterboard layer. Fix Villaboard lining as per Figure 2.
If required, install all services and insulation into the wall cavity. Install
Villaboard lining on the other side of the frame using the same method, and stagger the butt joints to ensure they do not occur on the same stud on opposite sides of the wall.
This will improve the frame’s structural stability and is necessary to achieve the acoustic values. To achieve staggered butt joints on the second side, cut the first sheet to half width ensuring that joints are staggered on alternate studs to joints on the first side.
At door and window openings, fix Villaboard lining around the openings so sheet edges do not coincide with the side of the door or window. This will reduce the possibility of joints cracking due to structural movement.
2.5.3 Fixing plasterboard over Villaboard lining
Where possible, fix the sheets horizontally. Vertically fixed sheets may be subject to the effect of glancing light upon joints.
Stagger the butt joints of the plasterboard with the joints of the Villaboard lining by at least 300mm.
Tape and set plasterboard joints.
See Figure 3 for fixing details.
Fix plasterboard in accordance with manufacturer’s fixing instructions.
2.5.4 Fixing plasterboard to framing
When the plasterboard will be installed over Villaboard lining, fix the plasterboard vertically, fixing edges of adjacent sheets centrally on studs.
When using a steel frame, start fixing sheets 50mm from top and bottom of frame. Fix plasterboard in accordance with manufacturer’s fixing instructions. See Figure 4 for fixing details.
2.5.5 Fixing Villaboard lining over plasterboard
Fix the sheets horizontally where possible. Sheets fixed vertically may be subject to the effect of glancing light upon joints.
Stagger the butt joints of the Villaboard lining with the joints of the plasterboard by at least 300mm.
Tape and set joints where required. See Figure 5 for fixing details.
2.5.6 Same lining orientation option
Villaboard lining may be installed over plasterboard either vertically or horizontally. Vertical joints must occur on studs. All joints (vertical and horizontal) must be staggered a minimum of 300mm from the plasterboard joint. Tape and flush set the joints. See Figure 6 for the vertically fixed option.
2.6 JOINTING SYSTEMS
Refer to James Hardie Villaboard Lining Installation Manual.
NOTE
If a two-layer system is selected, the layer fixed to the frame does not require jointing. These joints can be left unfilled prior to installation of second layer.
2.7 CAULKING AND SEALING MATERIALS
Where walling systems are required to have fire resistance levels and provide noise insulation, all gaps around the perimeter or services must be filled with an approved compound such as: n n
Cornice cement - proprietary plaster-based adhesive.
Fire resistant grade sealant (flexible) - compatible for use with fibre
cement and plasterboard sheets - intumescent sealant eg Fire Barrier
or equivalent, approved silicone sealant. The sealant may need to be
water resistant if required in a wet area.
2.8 CONTROL JOINTS
Control joints are required on long runs of wall at the following maximum centres:
TABLE 3: MAXIMUM SPACING FOR CONTROL JOINTS (m)
Steel Timber
General
Tiled walls
9.0
4.8
6.0
7.2
4.2
NOTE
When wall is selected for acoustic properties control joints must be staggered. When walls are to be tiled use box sections.
For best results, provide the control joints at points such as door heads and over large windows. For details of non-fire rated control joints see
Figure 7.
When using multiple layers, run control joint through all layers. At control joints, provide a break in the tiles and install double studs, back to back.
For details of fire rated control joints see Figure 8.
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JUNCTION AND PENETRATION DETAILS
3.1 GENERAL
This section includes details for different wall junctions.
3.10 EXTERNAL CORNERS
Perforated metal external corner angles should be fixed over sheet edges with fasteners at 300mm centres on each side. These may be set over to provide a smooth finish. See Figure 18 for a non-fire rated wall detail.
Double-layered fire wall corners are treated similarly.
3.2 WALL TO CEILING JUNCTION
A deflection head is required where the deflection of the concrete slab above the wall system is a design consideration, see Figure 9. For an alternative detail, see Figure 10.
Where a deflection head is not required, a plaster cornice can be used.
Alternatively, to achieve a flush appearance, the gap at the top of the wall lining must be filled with a suitable fire and acoustic rated sealant.
See Figure 11.
3.3 WALL TO FLOOR JUNCTION
For general wall to floor junction details, see Figure 12.
Surface mounted skirtings (flush or ducted) can be applied to the face of the wall linings or to each side of the framing.
3.4 JOINING TO EXISTING MASONRY WALL
The preferred methods of joining a James Hardie Fire and acoustically rated lightweight wall systems to a masonry surface are shown in
Figure 13.
3.11 SERVICE PENETRATIONS - GENERAL
3.11.1 General
In general, James Hardie or the BCA do not recommend service penetrations in fire and acoustically rated walls. Where service penetrations cannot be avoided, take particular care to ensure that the
FRLs and acoustic values are not diminished.
3.11.2 With service cavity
The addition of a service cavity using a 28mm furring channel on one or both sides can overcome a number of problems associated with walls containing plumbing and other services.
The use of a service cavity can also assist in reducing noise generated in pipes. Access to the service for maintenance purposes can also be improved. See Figure 19.
The plasterboard and Villaboard lining are separated by furring channels, typically 28mm deep, spaced at 450mm centres. The ends of the furring channel may be spaced up to 150mm apart for the purposes of running services.
Service cavities detailed for single stud systems may be incorporated into any of the other systems described in this manual.
3.5 DOOR TRIMMING
Where metal studs are used, the studs trimming the door opening should be boxed, and the head trim pop riveted to the studs. See Figure 14.
3.6 FLOOR TO WALL COVING IN CLEAN AREAS
In designing clean rooms, a common requirement is for a seamless epoxy resin-coated floor to be covered at the junction with the wall.
Where the wall is required to be fire rated, you can maintain the integrity of the fire resistance by using either of the alternative details shown in
Figure 15.
3.7 FLOOR TO WALL JUNCTION AT SHOWER TRAY
Where a shower recess in a wet area abuts a fire rated wall, the normal requirements for waterproofing the area must still be provided. See Figure
16. This detail shows wall tiling fixed directly to the wall lining with no provision for a service cavity. In this instance, the pipe work and tap and shower rose penetrations should preferably be located on a return wall.
The concrete slab is set down for an inset shower tray, to assist with achieving the required waterproofing. For more information on wet area construction refer to the James Hardie Wet Area Construction Design
Manual.
3.8 WALL TO BATH JUNCTION
Where a bath abuts a fire rated wall, the normal requirements for waterproofing in a wet area must still be maintained. See Figure 17. The service cavity shown in this detail provides a useful way of over-flashing the bath rim as well as the means of running the water pipes to the taps.
The cavity must be sufficiently deep to accommodate the tap bodies and support. For more information on wet area construction refer to the
James Hardie Wet Area Construction Design Manual.
3.9 INTERNAL CORNERS
Internal corners may be flush jointed using perforated paper tape embedded in bedding cement and finished with topping cement. A 35 x
35 or 50 x 50 x 0.75mm metal angle must be fixed to the studs to assist in reinforcing the corner joint. For non-fire rated corners see Figure 18.
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CONSTRUCTION OF FIRE AND ACOUSTICALLY RATED WALLS TECHNICAL SPECIFICATION JULY 2015
3.12 SERVICE PENETRATIONS - ELECTRICAL
SERVICES
3.12.1 General
1. Minimum distance between penetration edges and studs: 50mm.
2. Minimum distance between adjacent penetration edges: 300mm.
3. Baffles, where required, must extend 300mm above and below
outlets and extend the full width between studs.
4. Electrical boxes (power point and light switch) require careful attention to
maintain fire and acoustic ratings of the stud wall system.
Minor air gaps around the boxes can greatly reduce the acoustic
performance of wall systems.
Care must be taken when caulking around penetrations to eliminate all acoustic leakages.
3.12.2 FRL 60/60/60 construction i) Penetrations one side only n
Two electrical outlets maximum permitted to penetrate one wall face
between adjacent studs.
n
No baffle or insulation is required in the wall cavity.
ii) Penetrations both sides n
Two electrical outlets maximum permitted to penetrate between
adjacent studs.
n
A baffle consisting of one layer of 13mm fire resistant plasterboard is
required. See Figure 20.
NOTE
The baffle must extend 300mm above and below outlets. A baffle consisting of 2 layers of 16mm fire resistant plasterboard is required for
FRL 120/120/120 construction, for penetrations on one or both sides.
3.12.3 FRL 120/120/120 construction
Penetration one or both sides n
Two electrical outlets maximum permitted to penetrate between
adjacent studs.
n
A baffle consisting of two layers of 16mm fire resistant plasterboard.
NOTE
A baffle is also required where the penetration is on one side of the wall only. See Figure 25 and note regarding baffle.
3.12.4 Fire rated electrical boxes
Proprietary electrical boxes are available which do not require baffles to maintain fire performance. Where these are used, manufacturer’s recommendation must be followed.
It is essential you ensure that the use of such boxes, particularly in back to back configurations, meets the acoustic attenuation level specified for the wall.
3.12.5 Cable penetrations
Penetrations may be sealed by using either intumescent strips or sealant.
The methods shown in Figure 21 and Figure 22 have been tested and achieved a FRL 120/120/120.
3.13.3 FRL 120/120/120 construction
For 120/120/120 construction see Figure 24.
i) Tap penetrations one side only n
Two taps only permitted to penetrate one wall face between adjacent
studs, and pipes must be kept clear of the lining sheets and baffle.
n
Provide a baffle consisting of two layers of 16mm fire resistant and
water resistant plasterboard the full width between studs.
n
Baffle to extend 300mm above and below penetrations.
n
Taps must not be supported by the wall linings, but by a timber batten
fixed between the studs.
n
Minimum distance between penetration edges and studs is 20mm.
ii) Tap penetrations both sides.
n
Not permitted
Further information on water services in timber framed construction is provided in the James Hardie Fire and Acoustically Rated Walls Design
Manual.
3.14 SERVICE PENETRATIONS - PIPES
Both steel and copper pipes may fully penetrate a fire rated wall provided the penetrations on each face are sealed with intumescent products as shown in Figure 25 or by using fire collars in accordance with manufacturers’ recommendations.
The same detail applies for FRL 60/60/60 to 120/120/120 construction.
3.13 SERVICE PENETRATIONS
- WATER SERVICES
3.13.1 General
Care must be exercised where water services (eg taps and pipes) penetrate fire resistant and water resistant plasterboard. The requirements listed below must be observed.
3.13.2 FRL 60/60/60 construction
For 60/60/60 construction see Figure 23.
i) Tap penetrations one side only n
Two taps only permitted to penetrate one wall face between adjacent studs.
n
Taps/pipes must not be supported by the wall linings, but by a timber
batten fixed between the studs.
n
Minimum distance between penetration edges and studs is 20mm.
ii) Tap penetrations both sides n
Two taps only permitted to penetrate each wall face between adjacent
studs, and must be kept clear of the lining sheets.
NOTE
No baffle required in the wall cavity for FRL 60/60/60.
3.15 SERVICE PENETRATIONS - FIRE DAMPERS
The interface between the wall lining reveal and fire damper frame must be carefully sealed.
Typical details shown are kindly supplied by fire damper manufacturer
Thomas Clark & Son Pty Ltd. Details should be confirmed with the fire dampener manufacturer. See Figure 26.
Fire Test Report for Service Penetrations: CSIRO FSV 0220.
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RESIDENTIAL CONSTRUCTION DETAILS
4.1 GENERAL
The fire resistance of the wall must be fully maintained. Particular care must be taken to ensure the fire resistance is not diminished at the abutment with internal non-fire rated walls and at external walls. All gaps must be blocked to ensure that there is no spread of flame during a fire.
It is particularly important to block the spread of fire in the roof space.
Figure 27 shows a James Hardie preferred system extending between external walls.
Requirements for junctions at circled details A to D are shown in Figure
28 to Figure 31. Details A, C and D show options for both masonry and external cladding intersections.
Treatment at the eaves overhang is critical. Spread of fire is prevented by extending the separating wall into the eaves.
This essential safeguard is often overlooked. See Figure 32.
The cross-hatching indicates the area of the eaves that must also be fire separated.
This can be a single frame similar to that used in the roof space. See
Clause 4.7.2 of Design Manual.
STOREY BUILDINGS
Joists and beams should not penetrate the separating wall.
Timber joists which are fixed in the same direction as the separating wall should be placed hard against the Villaboard lining because the timber contributes to the fire protection. See Figure 33, 34, 35 and 36 for alternative framing options.
If open or narrow web joists are used, it will be necessary to install a solid timber section at wall only, not less than 45mm thick, as shown in
Figure 34.
If the joists are transverse to the separating wall, they should be supported by joist hangers or a steel angle as shown in Figure 35.
Steel beams should not be supported on, or penetrate, the separating wall. Steel columns can be enclosed within the wall provided the support to the beam is such that in the event of a floor collapse, the support will allow rotation of the beam. A suitable design is shown in Figure 36.
Framing and fixing must be in accordance with AS 1684. The timber dimensions used in this manual refer to the usual minimum dimensions of seasoned timber. For alternative timber sizes see Table 1.3 of AS 1684.2.
Internal walls systems
For frames up to 3m high use 70 x 45mm studs and plates, and 70 x
35mm noggings at 1350mm maximum. 90 x 35 studs may be used instead of 70 x 45 studs.
Where the height of a separating wall exceeds 3m the stud size must be increased to meet fire resistance requirements as shown in Table 5 of the
James Hardie Fire and acoustically rated walls Design Manual.
External walls systems
For frames up to 3.3m high, use 90 x 45mm studs and plates, and
90 x 45mm noggings at 1350mm maximum centres.
Where the height of an exernal wall exceeds 3.3m, the stud size must be increased to meet fire resistance requirement as shown in Table 5 of the
James Hardie Fire and Acoustically Rated Walls Design Manual.
In the case of Class 2 and 3 Buildings, the timber size required to meet structural loads must be determined by a professional engineer.
The studs must be spaced at not more than 600mm centres, with noggings at 1350mm maximum spacing.
Staggered stud frames must have studs spaced 300mm maximum centres apart.
Dual frames should be spaced 25mm apart. The spacing can be increased, up to 50mm, to provide more bearing area to support trusses.
Roof space
The joints in the separated fire rated wall linings, which are continued into the roof space can be butted together and not set.
4.4 VILLABOARD LINING FIXING REQUIREMENTS
It is recommended that the Villaboard lining be applied against the frame to provide bracing (see Design Manual Clause 4.7.4).
The sheets may be fixed vertically (for preference) allowing a gap of approximately 6mm between the bottom of the sheets and the floor.
Later, this gap must be sealed with cornice cement or fire resistant sealant or mastic eg propriety intumescent mastic or silicone brick and concrete sealant.
For acoustic and fire reasons, joints on either side of the frame must be offset.
Sheets may be butted and require no setting or sealing of the joints as long as any obvious gaps not located over a stud or nogging are closed by any convenient method (eg sealant, setting or backing). This will maintain the acoustic properties of the system. If fibre cement sheet joints need to be set, refer to James Hardie Villaboard Lining Installation
Manual for information.
Nail at 200mm along sheet edges and at 300mm centres in the field of the sheet using 2.8mm x 30mm long galvanised fibre cement nails. Nails should not be less than 12mm from sheet edges and 50mm from corners (see Figure 37). Refer to Tables 1 and 2 for further information.
If both linings on the same side are fixed in the same direction, joints must be offset by at least 300mm.
NOTE
When lining is reversed and fibre cement sheeting is fixed over plasterboard sheeting use 2.8mm x 50mm long galvanised fibre cement nails.
4.5 FIXING TO ACHIEVE BRACING
Villaboard lining can also act as structural bracing. Bracing sheets must be fixed with a vertical orientation and should extend to the frame edges.
For further information refer to the James Hardie Structural Bracing
Design Manual.
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CONSTRUCTION OF FIRE AND ACOUSTICALLY RATED WALLS TECHNICAL SPECIFICATION JULY 2015
REQUIREMENTS
Apply fire resistant plasterboard over the Villaboard lining as part of the internal lining work. Refer to Section 4.5 of the Fire and Acoustically Rated
Walls Design Manual for approved plasterboard linings.
The fire resistant plasterboard should be fixed horizontally and extend to the full height and width of the wall, with no gaps at the perimeter or the joints. It should be installed before the standard plasterboard is fixed on the abutting walls.
Fix using 2.8mm x 50mm long plasterboard nails spaced at 200mm along sheet edges and 300mm in the field of the board, refer to Tables 1 and 2 for more information.
Using paper tape, set and finish the joints in the plasterboard. Fill any gaps with cornice cement or fire resistant sealant eg silicone. Although, when plasterboard lining is installed as the 1st layer, the plasterboard joints may be butted together and not set.
For further information on fixing plasterboard contact the relevant plasterboard manufacturer.
NOTE
The Villaboard lining is usually fixed vertically and the fire resistant plasterboard horizontally. If they are both fixed in the same direction, joints in the plasterboard must not coincide with joints in the Villaboard lining. Offset the joints by at least 300mm.
4.7 WET AREAS
4.7.1 General
When a bathroom wall forms part of the separating wall, Villaboard lining, which is moisture resistant when installed and maintained correctly, should be used as the tile substrate. As this is usually a small area, the most convenient method is to over-sheet the fire resistant plasterboard with another layer of Villaboard lining. If the wall forms part of a shower recess use water and fire resistant plasterboard. Nail using 2.8 x 50mm fibre cement nails.
Separating walls must not be recessed to accommodate the lip of a bath. A recommended construction to accommodate the lip is shown in
Figure 38, using battens to create the required cavity.
When interchanging the internal lining layers in the same run of wall, the walls are joined as shown in Figure 8a.
Fore more information on wet area construction, refer to the James
Hardie Wet Area Construction Design Manual. Ask James Hardie™ on 13 11 03.
NOTE
Where a single or staggered wall frame is to be used service cavities must be provided.
4.7.2 Service cavities
If the installation of pipes in the separating walls cannot be avoided, it is recommended that a service cavity be provided.
After the separating wall has been completed and the plumbing installed, battens are fixed to the wall at not more 600mm centres to create the required cavity and the Villaboard lining is then applied as the tile substrate. See Figure 39.
4.7.3 Tap penetrations
In quality residential buildings, tap penetrations on separating walls should be avoided. While it is not difficult to maintain the fire resistance, the acoustic properties of the wall may be diminished. Consider using a service cavity as described in Clause 4.7.2.
Where penetrations cannot be avoided, the fire resistance of the wall must be maintained. To achieve this, the penetrations at the taps must be sealed with a fire rated wet area sealant.
Pipes should be at least 20mm clear of studs and be clear of the wall linings and supported by battens. See Figure 40 and Figure 41 for
60/60/60 FRL construction. In this construction, baffles are not required in the cavity space.
4.8 ELECTRICAL PENETRATIONS
Where the installation of power boxes and switches on separating walls cannot be avoided, the boxes should be of an approved and tested type.
Manufacturers of approved products include HPM Industries Pty Limited
(Part No. 430) and Tyco Distribution. Install in accordance with manufacturer’s instructions but note the following:
(a) No more than two electrical boxes are permitted between adjacent studs.
(b) Seal around boxes with Fire Barrier Silicone or as recommended by
manufacturer.
For walls where a FRL of 90/90/90 is required, a baffle consisting of two layers of 16mm fire resistant plasterboard must be inserted tightly in the cavity and extend at least 300mm above and below the tap. See Figure
42 and Figure 43.
(c) Baffles, if required, must fit tightly between studs and extend 300mm
above and below the outlet.
(d) Sound absorbing material, eg dense fibre-glass, should be placed
behind outlets.
(e) Avoid having boxes back to back and, if possible, locate between
different studs.
While manufacturers may have satisfactory tests for back-to-back configurations, the above recommendations are good practice.
For further information on electrical penetrations contact relevant manufacturers.
4.9 STEEL FRAME SEPARATING WALLS
A range of steel framed walls, load bearing and non-load bearing, are described in the James Hardie Fire and Acoustically Rated Wall Design
Manual. A dual frame wall included in this range exceeds Rw 60.
Non-loadbearing steel framed walls may be used in multi-storey Class 2 and 3 buildings without limits on the number of floors.
Where the builder prefers to continue erecting the frame without pausing to sheet the separating wall before the side walls are stood, blocking can be introduced to allow the Villaboard lining to be fixed after all framing is in position.
For blocking details refer to Multi-Residential Timber Framed Construction
Design and Construction Manuals.
CONSTRUCTION OF FIRE AND ACOUSTICALLY RATED WALLS TECHNICAL SPECIFICATION JULY 2015
9
5
DETAILS
4.11 EXTERNAL WALLS
4.11.1 General
Where the BCA requires an external wall to be fire rated in residential construction, an appropriate external wall can be created starting from the systems already detailed and adding one of James Hardie’s external cladding products as well as vapour permeable sarking.
4.11.2 Vapour permeable sarking
Vapour permeable sarking must be installed in the outside linings, between the external fibre cement layer and the water and fire resistant plasterboard. The vapour permeable sarking must be a breather type sarking eg ACI Sisalation 499 or Tyvek Radiant Barrier™.
4.11.3 External fibre cement layer
The external layer may be any of the range of James Hardie fibre cement external sheet products that are 6mm or more in thickness, or plank products that are 7.5mm or more in thickness, ie HardiTex
HardiFlex
®
sheets, PanelClad
®
sheets, HardiPlank
®
®
base sheet,
cladding, PrimeLine
® or Linea™ Weatherboards.
4.11.4 Fasteners
For fasteners selection in an external wall application, refer to the relevant product fixing manual. However, the fastener length will need to be adjusted to account for the additional plasterboard thickness. For more information Ask James Hardie™ 13 11 03.
4.11.5 Cold climates
In cold climates, where condensation is likely to occur, a vapour barrier may be required to protect the plasterboard on the inside.
4.11.6 Construction details
Fire rated walls must not be supported on a non-fire rated structure. The wall can be supported on a concrete floor or masonry.
The linings must cover the entire wall on both sides, except in Class 1
Buildings, where the external fire protection need only extend to the eaves lining provided the eaves lining is non-combustible. For FRL
60/60/60 see Figure 44 and for FRL 90/90/90 see Figure 45.
More extensive details are given in Figure 46 (FRL 60/60/60) and
Figure 47 (FRL 90/90/90).
NOTE
For design information on external wall refer to Section 6 of the Fire and acoustically rated walls Design Manual.
The various details outlined below have been referred to in the preceding text of this manual. These details are also available in CAD format at www.jameshardie.com.au
Villaboard lining
Ceiling track
Stud
Floor track
Refer to Section 4.4
Do not fix sheets to ceiling track
Do not fix sheets to ceiling track
Stagger
Fixings
12 min.
Do not fix sheets to floor track
Pack base of sheets using offcuts
FIGURE 2 FIXING FIRST LAYER TO VILLABOARD LINING
Villaboard lining
Tape and set joints
Do not fix sheets to floor track
Stagger sheet joints between layers
FR plasterboard
FIGURE 3 FIXING PLASTERBOARD OVER VILLABOARD LINING
10
CONSTRUCTION OF FIRE AND ACOUSTICALLY RATED WALLS TECHNICAL SPECIFICATION JULY 2015
Do not fix sheets to ceiling track
Do not fix sheets to ceiling track
Stagger
Fixings
10 -15 min.
Do not fix sheets to floor track
Pack base of sheets using offcuts max 10mm Plasterboard Lining
FIGURE 4 FIXING FIRST LAYER OF PLASTERBOARD
FR plasterboard
Villaboard lining
12 min.
Do not fix sheets to floor track
Tape and set joints
Stagger sheet joints between layers
FIGURE 6 VERTICAL INSTALLATION OF VILLABOARD LINING AND
PLASTERBOARD
Tape and set joints
Do not fix sheets to ceiling track made movement joint accessory eg Rondo P35
Villaboard lining
15 min. gap
Plastic insert removed after setting joint
(a)
Steel stud
Villaboard lining
Adhesive
Sealant
6 min.
Ceramic tiles
Control joint in (a) untiled walls and (b) tiled walls
Backing rod
(b)
Do not fix sheets to floor track
Stagger sheet joints between layers
FIGURE 7 NON-FIRE RATED CONTROL JOINTS
FR plasterboard
Villaboard lining
FIGURE 5 FIXING VILLABOARD LINING OVER PLASTERBOARD
CONSTRUCTION OF FIRE AND ACOUSTICALLY RATED WALLS TECHNICAL SPECIFICATION JULY 2015
11
Staggered screws on either side
Villaboard lining
FR plasterboard
Backing rod
W & FR plasterboard
Villaboard lining
Tile adhesive
Ceramic tiles
5 min.
Fire rated sealant
Stagger screws on either side
(a)
(b)
Fire rated sealant
Control joint in (a) untiled walls and (b) tiled walls
FIGURE 8 FIRE RATED CONTROL JOINTS
10 min.
Concrete slab
Fire Barrier - 2000 silicone sealant
(or equivalent)
Do not fix studs to track
15mm gap
FR plasterboard
Villaboard lining
FIGURE 10 WALL/CEILING JUNCTION - ALTERNATIVE DETAILS
FR plasterboard
Villaboard lining
Backing rod
W & FR plasterboard
Villaboard lining
Wet area
5 min.
Living area
FR plasterboard
Villaboard lining
Fire rated sealant
Seal between track and ceiling with James Hardie joint sealant or equivalent when acoustic performance is required
Cornice
Concrete slab
Seal gap with a suitable fire and acoustic rated sealant
Ceiling track
FR plasterboard
Villaboard lining
FIGURE 8A INTERCHANGING THE LINING LAYERS IN THE SAME
RUN OF WALL
FIGURE 11 WALL/CEILING JUNCTION WITHOUT DEFLECTION HEAD
NOTE Cornice not required to achieve fire or acoustic rating.
Cornice cement
Concrete slab
Fire Barrier - 2000 silicone sealant
(or equivalent)
Cornice
Paintable grade flexible sealant
10 min.
Shadowline stopping angle or bead
15mm gap
FR plasterboard
Villaboard lining
Seal between track and floor with James
Hardie joint sealant or equivalent when acoustic performance is required
Villaboard lining
FR plasterboard
15 mm gap
Floor track
Plaster fill
Concrete slab
FIGURE 9 WALL/CEILING JUNCTION WITH DEFLECTION HEAD FIGURE 12 WALL/FLOOR JUNCTION
12
CONSTRUCTION OF FIRE AND ACOUSTICALLY RATED WALLS TECHNICAL SPECIFICATION JULY 2015
Option (a)
Masonry wall
Casing bead
Villaboard lining
Fasteners at
600mm centres
Villaboard lining
FR plasterboard
Fire Barrier 2000 silicone sealant
(or equivalent)
Nogging
FR plasterboard
Steel stud
Option (b)
Flexible sealant
FIGURE 13 NON-FIRE RATED WALL INTERSECTION WITH
MASONRY/CONCRETE
NOTE For fire rated walls use Fire Barrier - 2000 Silicone Sealant
(or equivalent).
Cut track, fold and pop rivet to jamb stud
Rivet
Single
Stud
Single stud
Double studs
Door frame
Galv. metal skirt
Epoxy resin coving
15 mm gap
Floor track
Plaster fill
Fire rated wall showing epoxy coving or flush wall details
FIGURE 15 FIRE RATED WALL SHOWING EPOXY COVING/FLUSH
WALL TO FLOOR DETAILS
Villaboard lining
W & FR plasterboard
Internal vertical corner flashing extends vertically from internal tray at corner
Ceramic tiles
Internal in-situ shower tray
Plaster fill
Pop rivet studs to floor and ceiling tracks
Cut track, fold and pop rivet to jamb stud
Masking tape
Foam rod as bond breaker
Mortar bed
FIGURE 16 INSET SHOWER TRAY AT SLAB SET DOWN
3mm dia.
pop rivets
Double stud
Refer to fire door manufacturer for specific details
FIGURE 14 TYPICAL FRAMING AT A DOOR OPENING
NOTES
1. Where practical provide a set-down in the concrete slab.
2. If W & FR plasterboard is not available apply a waterproof sealer or fix
polyethylene industrial black film over the FR plasterboard.
3. For more information on wet area construction, refer to the James
Hardie Wet Area Construction Design Manual.
CONSTRUCTION OF FIRE AND ACOUSTICALLY RATED WALLS TECHNICAL SPECIFICATION JULY 2015
13
FIGURE 17 WALL/BATH RIM JUNCTION
Villaboard lining
FR plasterboard
W & FR plasterboard
Internal vertical corner flashing
Service cavity
Furring channel
Tiles
Sealant
Bath
Section
`X'
X
28mm furring channel at 450mm centres
FR plasterboard
28mm furring channel for service cavity
Villaboard lining
600 max.
Villaboard lining
FR plasterboard
FIGURE 19 SINGLE STUD FRAME WITH SERVICE CAVITY
Steel studs
(b)
Flush set over corner bead Steel stud
13mm FR plasterboard
6mm Villaboard lining
(a)
(a) Internal corner
(b) External corner
FIGURE 18 CORNER DETAILS
Electrical cutout
6mm Villaboard lining
Steel stud
50 min.
Fasteners at 600mm vertical centres
0.75mm thick corner angle
Flush set using paper reinforcing tape
Villaboard lining
Baffle
FIGURE 20 SPACING AND PROTECTION OF ELECTRICAL OUTLETS
14
CONSTRUCTION OF FIRE AND ACOUSTICALLY RATED WALLS TECHNICAL SPECIFICATION JULY 2015
Intumescent mastic
(must fill in between cables)
50 min.
13mm FR plasterboard
6mm Villaboard lining
Steel stud
Cable tray
20 min
Wall tiling
Hardwood support batten Fire rated sealant
FR plasterboard
Villaboard lining
FIGURE 23 TAP PENETRATIONS FRL 60/60/60 CONSTRUCTION
FIGURE 21 TYPICAL MULTI-CABLE PENETRATION - SECTION
16mm FR plasterboard
9mm Villaboard lining
Steel stud
Cable tray
1 layer of FR plasterboard overlaid with
1 layer of Villaboard lining
30mm wide intumescent mastic overlap
20 min
Wall tiling
Hardwood support batten
Fire Barrier
2000 silicone sealant (or equivalent)
FIGURE 24 TAP PENETRATIONS FRL 120/120/120 CONSTRUCTION
IBS 50 x 20mm
Intumescent strip
Mixture of cables of differing type and size
FIGURE 22 ISOMETRIC VIEW OF TYPICAL CABLE TRAY
PENETRATION
CONSTRUCTION OF FIRE AND ACOUSTICALLY RATED WALLS TECHNICAL SPECIFICATION JULY 2015
15
Option 1
50
50
Fire Barrier 2000 silicone sealant (or equivalent)
22mm dia.
intumescent rod
Non fire rated masonry veneer wall
A
See Figure 28
(a) or (b)
Fire rated separating wall
B
See Figure 29
Option 1 or 2
Option 2
Fire Barrier 2000 silicone sealant (or equivalent)
Fire intumescent protection sleeve
FIGURE 25 PIPES PENETRATING TYPICAL WALL SYSTEM
C
See Figure 30
(a) or (b)
FR plasterboard
Villaboard lining
40 nom
5
40 x 40 x 2.5mm
D
See Figure 31
(a) or (b)
Internal lining
6mm Villaboard lining under:
13mm FR Plasterboard for 60/60/60 or
16mm FR Plasterboard for 90/90/90 on both sides of wall frame
FIGURE 27 PLAN OF SEPARATING WALL
Non fire rated masonry veneer wall
Proprietary fire damper
40mm wide x 16mm
FR plasterboard
Fire Barrier 2000 silicone sealant (or equivalent)
22mm dia.
intumescent rods
FIGURE 26 TYPICAL FIRE DAMPER INSTALLATION
16
CONSTRUCTION OF FIRE AND ACOUSTICALLY RATED WALLS TECHNICAL SPECIFICATION JULY 2015
Masonry wall
(a) Masonry
FIGURE 28 DETAIL A - AT EXTERNAL WALL
Non-fire rated wall
External cladding
Alcor or similar flashing
Pack cavity with fire resistant material eg: mineral wool
Vapour permeable sarking
Acoustic insulation
FR plasterboard
6mm Villaboard lining continued to end of stud wall
25mm gap
(b) External Cladding
Acoustic insulation blanket
Non-fire rated wall
Acoustic insulation blanket
Non-fire rated wall
Noggings at 600mm centres
FR plasterboard
Dual frame
6mm Villaboard lining
25mm gap
(a) Option 1
FIGURE 29 DETAIL B - JUNCTION WITH NON-FIRE RATED INTERNAL WALL
(b) Option 2
FR plasterboard
Dual frame
6mm Villaboard lining
CONSTRUCTION OF FIRE AND ACOUSTICALLY RATED WALLS TECHNICAL SPECIFICATION JULY 2015
17
FR plasterboard
6mm Villaboard lining
Alcor or similar flashing
Pack cavity with fire resistant material eg mineral wool
6mm Villaboard lining
Acoustic insulation blanket
FR plasterboard
Dual frame
Vapour permeable sarking
External masonry wall
25mm gap
(a) Masonry
FIGURE 30 DETAIL C - RETURN ON EXTERNAL WALL
FR plasterboard
6mm Villaboard lining
Frame
NOTE:
No cavity fire barrier required
External masonry wall
(b) External Cladding
Non-fire rated wall
External cladding eg HardiTex
® system
FR plasterboard
6mm Villaboard lining
Frame
(b) External cladding
External cladding eg HardiTex
®
system
Vapour permeable sarking
Non-fire rated wall
(a) Masonry
FIGURE 31 DETAIL D - EXTERNAL CORNER
18
CONSTRUCTION OF FIRE AND ACOUSTICALLY RATED WALLS TECHNICAL SPECIFICATION JULY 2015
Pack between battens over separating wall with mineral wool
Roof frame
Pack cavity with mineral wool
Timber flooring
Solid timber section
Detail for
FRL 60/60/60.
For FRL 90/90/90 add third joist.
Non-combustible HardiFlex
® or Eclipsa
®
eaves lining
Fire separation carried through in eaves space
Non-fire rated external wall
FIGURE 32 FIRE SEPARATION AT EAVES
Open web joists parallel to separating wall
Cornice or square set as required
Acoustic insulation
Option 1
Dual frame
FR plasterboard
6mm Villaboard lining
25mm gap
Option 2
FIGURE 34 OPEN WEB JOISTS - PARALLEL TO WALL
Pack cavity with mineral wool
Timber flooring
NOTE:
Third joist essential for FRL 90/90/90 only
Steel angle supporting joist
Acoustic insulation
Pack cavity with mineral wool
Joist hangers fixed as per manufactures details
Timber flooring
Joists parallel to separating wall
Cornice or square set as required
Acoustic insulation
Option 1
FIGURE 33 TIMBER JOIST - PARALLEL TO WALL
Dual frame
FR plasterboard
6mm Villaboard lining
25mm gap
Option 2
Option 1
FIGURE 35 JOISTS TRANSVERSE TO WALL
Cornice or square set as required
Dual frame
FR plasterboard
6mm Villaboard lining
25mm gap
Option 2
CONSTRUCTION OF FIRE AND ACOUSTICALLY RATED WALLS TECHNICAL SPECIFICATION JULY 2015
19
Joists parallel to separating wall
Acoustic insulation
70 x 45mm studs at 600 max. cts.
25
FIGURE 36 STEEL BEAM SUPPORT
Steel beam
152 x 100 x 20mm steel plate
Typical
75 x 75 x 4 SHS
FR plasterboard
NOTE:
Steel column and beam to be determined by engineers
Water resistant
FR plasterboard
6mm Villaboard lining
25mm gap
Dual frame
6mm Villaboard lining fixed to timber battens at 600mm max.
centres
Ceramic tiles
Flexible wet area sealant
Bath or shower supported on batten fixed to studs
Packer if required
Acoustic insulation
FIGURE 38 RECESS TO ACCOMMODATE THE BATH LIP
50 min. from corners
6mm Villaboard lining fixed vertically
300 max.
Polyester or fiberglass insulation
Dual frame wall
12 from edges
FR plasterboard fixed horizontally
Noggings at 1350mm max.centres
200 max.
Allows 6mm gap between bottom of sheets and floor and fill with fire resistant material
FIGURE 37 SHEET LAYOUT AND FIXING DETAIL
Fastener spacing for each layer 200mm min.
centres along edges at studs and 300mm min in the field of the sheets
All vertical butt joints to be on studs
25mm gap
FIGURE 39 SERVICE CAVITY IN SHOWER RECESS TO
ACCOMMODATE PIPES
Service cavity
Horizontal timber battens at 600mm max. spacing
6mm Villaboard lining over timber battens
Insitu shower tray
Ceramic tiles
Dual frame
Separating wall linings
75mm min
Masking tape
Foam backing rod
HardiPanel
® compressed wet area flooring
20
CONSTRUCTION OF FIRE AND ACOUSTICALLY RATED WALLS TECHNICAL SPECIFICATION JULY 2015
Tap Body
Ceramic Tiles
6mm Villaboard lining
13mm W & FR plasterboard
50mm fibreglass insulation
Batten
Stud
Foam backing rod
Use hole saw to form neat cut out for plumbing fixtures
Flexible wet area sealant
FIGURE 40 PENETRATIONS AT TAPS (PLAN) 60/60/60 FRL
CONSTRUCTION
Tap Body
Ceramic Tiles
Outer 6mm
Villaboard lining required only for tiling
16mm W & FR plasterboard
Baffle - 2 layers of 16mm FR plasterboard
50mm fibreglass insulation
Batten
Stud
Foam backing rod
Use hole saw to form neat cut out for plumbing fixtures
Flexible wet area sealant
FIGURE 42 PENETRATION AT TAPS (PLAN) 90/90/90 FRL
CONSTRUCTION
13mm W & FR plasterboard
6mm Villaboard lining
Ceramic tiles
Batten
Tap body
16mm W & FR plasterboard
Outer 6mm Villaboard lining required only for tiling
Ceramic tiles
Batten
Tap body
300 min.
Flexible wet area sealant
Use hole saw to form neat cut out for plumbing fixtures
Foam backing rod
Stud
50mm fibreglass insulation
25mm gap
FIGURE 41 PENETRATIONS AT TAPS (ELEVATION) 60/60/60 FRL
CONSTRUCTION
Flexible wet area sealant
Use hole saw to form neat cut out for plumbing fixtures
Foam backing rod
Stud
50mm fibreglass insulation
25mm gap
Baffle - 2 Layers of 16mm FR plasterboard
300 min.
FIGURE 43 PENETRATION AT TAPS (ELEVATION) 90/90/90 FRL
CONSTRUCTION
CONSTRUCTION OF FIRE AND ACOUSTICALLY RATED WALLS TECHNICAL SPECIFICATION JULY 2015
21
90 x 45 studs
Nogging at 1350mm max. centres
13mm W & FR plasterboard lining
Vapour permeable sarking
External Layer eg HardiTex base sheet (See Clause 4.11)
FIGURE 44
90 x 45 studs
600 max.
6mm Villaboard lining
13mm FR plasterboard
These linings are interchangeable in garages and wet areas
EXTERNAL WALL FRL 60/60/60
Insulation
(optional)
Internal Lining
6mm Villaboard lining under 13mm
FR plasterboard
Non combustible eaves lining eg: Hardiflex
® eaves lining or Eclipsa eaves lining
Fire wall to extend to underside of non-combustible
Hardiflex
®
eaves lining
Vapour permeable sarking installed behind fibre cement external layer and in front of
F & WR plasterboard
Frame
90 x 45 studs at
600 max. centres.
90 x 45 plates. 90 x 45 noggings at 1350 max.
centres. (min. sizes, may increase with design loads).
External layer
(See Clause 4.11
and Figure 44)
13mm F & WR plasterboard
Nogging at 1350mm max. centres
16mm W & FR plasterboard lining
Vapour permeable sarking
External Layer eg HardiTex base sheet (See Clause 4.11)
Sectional elevation single storey class 1 building FRL 60/60/60
FIGURE 46 TIMBER-FRAMED EXTERNAL WALL FRL 60/60/60
600 max.
6mm Villaboard lining
16mm FR plasterboard
FIGURE 45 EXTERNAL WALL FRL 90/90/90
22
CONSTRUCTION OF FIRE AND ACOUSTICALLY RATED WALLS TECHNICAL SPECIFICATION JULY 2015
Pack cavity with mineral wool
2 x 45mm timber blocking between roof frames
External cladding extends beyond eaves line
Internal lining
6mm Villaboard lining under 16mm
FR plasterboard
Non combustible eaves lining eg: Hardiflex
® eaves lining or Eclipsa eaves lining.
Frame
90 x 45 studs at
600 max. centres.
90 x 45 plates 90 x 45 noggings at 1350 max.
centres. (min. sizes, may increase with design loads). see Section 4.2
Transverse joists
Timber blocking
(2 x 45mm)
16mm F & WR
Plasterboard
Vapour permeable sarking installed behind fibre cement external layer and in front of
F & WR plasterboard
External James Hardie fibre cement layer
(See Clause 4.11 and
Figure 45)
FIGURE 47 TIMBER-FRAMED EXTERNAL WALL FRL 90/90/90
CONSTRUCTION OF FIRE AND ACOUSTICALLY RATED WALLS TECHNICAL SPECIFICATION JULY 2015
23
© Copyright 2014 James Hardie Australia Pty Ltd. ABN 12 084 635 558.
™ and ® denotes a trademark or registered mark owned by James Hardie Technology Limited
JHML112633
Fire and acoustically rated walls
Technical specification
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