Fire and Acoustic Design Manual October 2010 / New Zealand
1 Contents 2 Introduction 3 3 Application and scope 3 3.1 Application 3 3.2 Scope 3 3.3 Responsibility 3 4 System index 5 5 How to use this manual 9 5.1 Table Data 9 5.2 Colour Legend 9 5.3 James Hardie Fire and Acoustic System Description 9 5.4 STC and Rw 9 5.5 R-values 9 5.6 Wall Width 9 5.7 Wall Height 9 6 Design guideline 10 6.1 General 10 6.2 Framing 10 6.3 Timber 10 6.4 Steel 10 6.5 Insulation 10 6.6 Support 11 6.7 Building Wrap or Rigid Air Barrier 11 6.8 Expansion and Control Joints 11 6.9 Control Joints 11 6.10 Layout and Fixings 11 6.11 Coatings and Finishes 12 7 NZBC considerations 12 7.1 Structure 12 7.2 Emergency Loads 12 7.3 Bracing 12 7.4 Durability 12 7.5 Fire Performance 12 7.6 Fire Resistance 12 7.7 Requirements for Interior Surface Finishes 13 7.8 Heat Release Rates of External Wall Claddings 13 7.9 External Moisture E2 13 7.10 Internal Moisture 13 7.11 Thermal Performance 13 7.12 Acoustic Performance 13 7.13 Airborne Sound 14 7.14 Impact Sound 14 7.15 Tests and Opinions 14 7.16 Alternative Products 14 7.17 Compliance 14 7.18 Thermal Fire Batten 15 7.19 Referenced Documents 15 8 Internal walls 16 8.1 General 16 8.2 Continuity and Isolation 16 8.3 Extent of Wall 16 8.4 Internal Fire Rated Systems 16 9 External walls 22 10 RAB Board 28 11 Internal floors/ceiling 29 12 Construction details 31 12.1 Framing 31 12.2 Building Wrap/RAB Board 31 12.3 Insulation 31 12.4 James Hardie Cladding or Lining 31 12.5 Cavity Construction 31 12.6 GIB Standard Plasterboard and GIB Fyreline Lining 31 12.7 Services Penetrations 31 13 Construction details 32 13.1 James Hardie Fire Rated Soffits Construction 43 14 Safe working practice 44 15 Product information and accessories 46 16 Warranties 47 we Value Your Feedback To continue with 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 0800 808 988 literaturefeedback@jameshardie.co.nz 2 Fire and Acoustic Design Manual October 2010 New Zealand
2 Introduction This manual provides information about James Hardie two way fire and acoustic systems using timber or steel frames in residential or non residential construction, such as: n Separating walls in multi unit residential or commercial buildings n External walls close to boundaries In terms of the New Zealand Building Code (NZBC) requirements, fire rating is referred to as FRR (Fire Resistance Rating) and is measured in minutes e.g. a FRR 30/30/30 means a fire rating for 30 minutes. Further explanation regarding this is provided in section 7.6 of this technical specification. 3 Application and scope 3.1 Application The fire and acoustic rated walls described in this specification can be used to meet a wide range of performance requirements to suit most applications as indicated in this section. The following page describes the various James Hardie products that can be used in internal or external fire and acoustic rated walls. Designers should be familiar with the NZBC and should read this manual to ascertain the extent of the partnership required between themselves and James Hardie in delivering effective fire rated and acoustic systems. This manual may be used as a guide to comply with NZBC requirements. The sections have been arranged to allow for quick familiarisation with James Hardie fire and acoustic systems. It is assumed that all readers are familiar with the relevant James Hardie cladding and lining product literature. The information provided in this manual includes the specific use of James Hardie fibre cement products for fire rating and acoustic requirements. If you are a designer / specifier Ensure that you read the approved document for fire and safety, Clause C of the NZBC and check its requirements. Ensure that the information in this document is appropriate for the application you are planning and that you undertake specific design and detailing for areas which fall outside the scope of this manual. If you are an installer Ensure that you follow the complete system requirements as mentioned in this literature to achieve the required performance levels. Follow the design, moisture management and associated details and material selection provided by the designer. The systems provided in this manual must be read and installed in conjunction with the project specifications. Any material specified in this manual when substituted may affect the system performance. All James Hardie products shall be installed as per the relevant product technical literature. Make sure your information is up to date When specifying or installing James Hardie products, ensure you have the current manual. If you re not sure you do, or you need more information, visit www.jameshardie.co.nz or Ask James Hardie on 0800 808 868. For internal partition walls, Villaboard Lining is a suitable product for use in internal fire and acoustic rated walls. Villaboard Lining can also be used to achieve bracing where required. It can provide significant bracing strength immediately after the installation. For external walls, a range of James Hardie claddings 6mm or thicker are available which are suitable for use in fire and acoustically rated wall systems. James Hardie fibre cement products permit sound-insulated walls that are slimmer than other traditional walling materials. These thinner walls have advantages in hotels, motels and similar accommodation venues where maximum floor area utilisation is paramount. All James Hardie products are resistant to fire and damage from moisture, cracking and rotting when installed and maintained as per James Hardie s published literature current at the time of installation. This manual is intended to assist designers in selecting a suitable James Hardie product and to choose a system which will meet their performance requirements. The system details have also been provided in this manual for the ease of material selection. 3.2 Scope The fire and acoustic systems provided in this design manual are suitable for residential or non-residential buildings. These systems provide the performance levels required to comply with C/AS1 and G6 Clauses of NZBC. 3.3 responsibility The designer must ensure that the information and details published in this manual are appropriate for the intended application and that additional information is obtained and detailing is performed for those systems that fall outside the scope of this manual. The designers should ensure that the intent of their design meets the requirements of the NZBC. All New Zealand Standards referenced in this document are current edition and must be complied with. James Hardie conducts stringent quality checks to ensure that any product manufactured falls within our quality spectrum. It is the responsibility of the builder to ensure that the product meets aesthetic requirements before installation. James Hardie will not be responsible for rectifying obvious aesthetic surface variations after the installation of product. Fire and Acoustic Design Manual October 2010 New Zealand 3
The following James Hardie products are auitable for use in fire rated systems specified in this design guide. Villaboard Lining 6mm and 9mm Internal lining fixed with butt or flush stopped joints. Refer to Villaboard Lining Installation Manual for information regarding fixing. RAB Board 6mm Rigid Air Barrier suitable to achieve fire ratings regardless of the cladding used with it. Refer to James Hardie Rigid Air Barriers Installation Manual for information regarding fixing. Monotek Sheet 7.5mm and 9mm Texture coated external cladding. Refer to Monotek Sheet Technical Specificiation for information regarding finixing. Linea Weatherboard 16mm 16mm thick pre-primed weatherboard where a 90 minute FRR can be achieved. Refer to Linea Weatherboard Technical Specifiation for information regarding fixing. Titan and ExoTec Facade Panels 9mm Expressed jointed panels, paint finished for external claddings on residential or commercial projects. Refer to Titan and ExoTec Facade Panel Rainscreen Technical Speficiations for information regarding fixing. James Hardie Weatherboards 7.5mm Weatherboard cladding with a range of finishes available. Refer to James Hardie Weatherboard Technical Specification for information regarding fixing. HardieFlex Sheet 6mm and 7.5mm External panel cladding with different jointing options available. Refer to HardieFlex Sheet Techncial Specifiation for information regarding fixing. Axon Panel 9mm Pre-primed cladding with subtle vertical lines. Refer to Axon Panel Techncial Specification for information regarding fixing. 4 Fire and Acoustic Design Manual October 2010 New Zealand
4 System index The following table gives the key information regarding different fire rated and acoustic systems provided in this manual and indicates the page numbers where more descriptive information can be found. All the fire rated systems given in these tables are two way fire rated systems. The information under the 'Reference' column refers to BRANZ report, assessment, or opinion which confirms the fire performance of a system. 4.1 Internal walls Internal 30 minute TWO WAY Fire Rated and Acoustic System System Arrangement James Hardie System Number Stud Depth (mm) FRR STC Page REFERENCE # JHITGV30 90 30/30/30 41 43 16 BRANZ Opinion 98/1335 JHITVV30 90 30/30/30 43 46 17 BRANZ FAR1601 JHIT dvv30 90 x 2 30/30/30 54 62 17 BRANZ FR2864 JHISVV g30 (a) 89 30/30/30 53 56 (with fibreglass insulation) 18 GBS60 Internal 60 minute TWO WAY Fire Rated and Acoustic System JHITGV60 90 60/60/60 41 43 18 BRANZ FR2493 FR2465 JHITVV60 90 60/60/60 43 46 19 BRANZ FAR1601 JHITVV g60 (a) 90 60/60/60 44 47 19 GBTL60 JHIT dvv60 90 x 2 60/60/60 53 57 20 BRANZ FR2864 Fire and Acoustic Design Manual October 2010 New Zealand 5
JHISVV g60 89 60/60/60 55 58 (with fibreglass insulation) 20 Internal 90 minute TWO WAY Fire Rated and Acoustic System JHITVV g90 90 90/90/90 45 48 21 GBTL90 JHISVV g90 89 90/90/90 54 57 (with fibreglass insulation) 21 6 Fire and Acoustic Design Manual October 2010 New Zealand
4.2 External walls External 30 minute TWO WAY Fire Rated AND ACOUSTIC System System Arrangement James Hardie System Number Stud Depth (MM) FRR STC Page REFERENCE # JHETGJ30 90 30/30/30 40 42 22 BRANZ Opinion 98/1335 JHETJJ30 90 30/30/30 39 43 22 BRANZ FAR1601 JHESJJ30 89 30/30/30 42 47 23 BRANZ FR3004 JHETGL30 90 30/30/30 43 23 BRANZ FR3051 FAR1875 JHETJL30 90 30/30/30 46 24 BRANZ FAR1831 JHETLL30 90 30/30/30 46 24 BRANZ FR3051 FAR1875 External 60 minute TWO WAY Fire Rated AND ACOUSTIC System JHETGJ60 90 60/60/60 41 43 25 BRANZ FR2493 FR2465 JHETJJ60 90 60/60/60 42 45 25 BRANZ FAR1601 JHESGJ60 89 60/60/60 40 42 26 BRANZ FR2719 FR2711 Fire and Acoustic Design Manual October 2010 New Zealand 7
JHETGL60 90 60/60/60 45 26 BRANZ FR3051 FAR1875 JHETLL60 90 60/60/60 46 27 BRANZ FR3051 FAR1875 External 90 minute TWO WAY Fire Rated AND ACOUSTIC System JHETGL90 90 90/90/90 45 27 BRANZ FAR2807 4.3 RAB Board fire rated systems System Arrangement James Hardie System Number STUD Depth (MM) FRR STC/IIC Page JHETGR30 90 30/30/30 41 28 JHETGR60 90 60/60/60 41 28 4.4 Flooring/ceilings fire rated systems System Arrangement James Hardie System Number FLOOR JOIST Depth (MM) FRR STC/IIC Page JHFTGJ15 150 15/15/15 45 / 36 29 JHFTGJ45 200 45/45/45 45 / 36 29 JHFTGJ60 200 60/60/60 45 / 36 30 8 Fire and Acoustic Design Manual October 2010 New Zealand
5 How to use this manual 5.1 Table Data The following table explains how to read the information provided in the system tables. MINIMUM Mandatory Requirement Options and Other information 5.2 Colour Legend SYSTEM NUMBER WALL SECTION Sound Attenuation Data Section drawings have been used in each table using the following colour legend. FIRE RETARDANT BUILDING WRAP THERMAL FIRE BATTENS J = ANY JAMES HARDIE CLADDING OR LINING PER SCOPE V = VILLABOARD LINING G = GIB RAB BOARD 5.3 James Hardie Fire and Acoustic system Description A comprehensive range of FRR timber framed and steel framed wall systems are included in this manual. Each FRR system is identified by unique nomenclature preceded by the letters JH (e.g.jhetjj60) to identify it as one of the James Hardie fire resistance rated wall systems. The explanation of system nomenclature used is as follows: n After JH the first letter defines the application I Interior system only E Exterior system only F Floor system only n After JH the second letter describes the framing material used with a subscript, d denoting double studs. T timber frame S steel frame n After JH, the third and fourth letter describes the material used on each side respectively. A subscript g identifies the James Hardie product is fixed over plasterboard on both sides. J is used to indicate the use of a James Hardie product in a FRR system. The following letters may be used to generate a unique number to fully describe a cladding or a lining product used in a FRR system: J Any James Hardie cladding or lining material as per the scope of this manual R RAB Board X HardieFlex Sheet M Monotek Sheet T Titan Façade Panel A Axon Panel L Linea Weatherboard W James Hardie Weatherboards V Villaboard Lining G Gib Plasterboard (G is generally used in James Hardie system to identify the use of a Gib product). The last two digits indicate the fire resistance rating in minutes. Returning to the earlier example, JHETJJ60 means this is a James Hardie external fire rated system that uses a standard timber frame with a James Hardie cladding on one face and a James Hardie lining on the other face and the fire rating achieved is up to 60 minutes. 5.4 STC and Rw Tested or modeled Rw and STC data is indicated in the shaded cells provided for each system. Refer to section 6.7 regarding the information on STC and Rw. Refer to section 7.12 and 7.13 for the description of methods used to calculate the acoustic performance. 5.5 R-values R-values provided in this manual for external walls have been calculated considering the thermal conductivity of each material and their thickness used in the construction of a wall. The insulation specified in external fire rated systems is a minimum requirement to achieve the desired fire rating performance. For options that would only marginally increase the R-value (e.g.1.5mm increased cladding sheet thickness) has been ignored and the lowest value is presented for simplicity. The fire rated systems, where a fibreglass R2.2 insulation has been specified, may require insulation to be replaced with a higher R value insulation material to comply with the minimum insulation requirements of Clause H1 of NZBC. 5.6 Wall Width Wall thickness data has been presented for comparative purposes. This is a theoretical figure which excludes construction tolerances and finishes. The nominal wall width figure is based on the product thickness used on each side of the wall. 5.7 Wall HEIGHT The fire rated systems specified in this manual have been tested to a maximum wall height of 3m. Fire and Acoustic Design Manual October 2010 New Zealand 9
6 Design guideline 6.1 General To achieve the performance levels as described in each system, all materials as specified in the system must be used and are a minimum requirement. The basic information regarding the materials to be used can be found in the individual systems, section 7 for internal walls and section 8 for external walls. Information about James Hardie materials are outlined in various tables. The following section outlines the minimum specifications of other related components. 6.2 Framing Timber FRR systems are generally simpler systems with fewer accessories. A timber sound attenuation system also behaves more predictably than a steel system. Systems using both framing materials are presented in this manual. Framing must not be less than that outlined in this section and the minimum requirements of the selected materials technical literature. The frame sizes and spacing mentioned in this manual are a minimum requirement. Bigger framing sections either required to suit a proprietary cladding system or to suit higher face loadings, will not affect the FRR, providing that the system requirements presented in this manual are adhered to. Bigger framing sections may affect the acoustic performance. Higher levels of timber treatments or steel coating to enhance their durability will not alter the fire or acoustic performance of the systems. Sheet set-out must be determined by the designer including the location of all expansion and control joints to enable correct framing set-out (these must be in accordance with the relevant James Hardie product literature). 6.3 Timber Framing timber must either be in accordance with NZS 3604 or in accordance with specific engineering design (SED) as per AS/NZS 1170 and NZS 3603 standards. The stud, nogs / dwangs and floor joist spacing, timber size should meet the following requirements: For walls: n Maximum stud spacing 600mm. n Maximum nogs / dwangs spacing of 800mm. n Minimum framing of 90 x 45mm shall be used. n Minimum framing depth as per fire and acoustic system selected or the structural requirements whichever is greater. n Ensure that timber is specified with correct hazard class treatment and stress grade suitable for the intended application. n All sheet edges must be supported by framing timber. n Bottom plates must be fixed in accordance with NZS 3604 or as per specific engineering design requirements. n Timber framing treatment to comply with the minimum requirements of NZS 3602. For floors: n Minimum 50mm wide floor joists shall be used. n Solid strutting of floor joists is required at 1800mm c/c. 6.4 Steel Steel framing for fire rated walls must be designed in accordance with AS/NZS 4600, NZS 3404 and AS/NZ1170 standards and should meet the following requirements: n Steel sections shall be galvanized/zinc coated and have a base metal thickness (BMT) 0.55mm minimum and 1.6mm maximum. n The minimum size for steel stud framing to be used in external walls shall be minimum 89mm deep x 35mm wide x 0.55mm thick. n Maximum stud spacing 400mm c/c. n Maximum nogs / dwangs spacing 800mm c/c. n Protective coating on steel frame must provide the durability required to comply with NZBC. n For jointing of the flat sheet products, double studs securely fastened together must be provided where a higher framing width is required. All sheet edges must be supported by framing. Steel sections thicker than those sound tested may adversely affect the predicted sound ratings of a system. Emergency fire load capacities for steel framed walls require special calculation. Refer to section 7.2 for further information. All steel framing must be used according to their manufacturer s instructions. Steel framing properties vary considerably depending upon the grade of steel used. It is the designer s responsibility to ensure the type of framing selected is fit for purpose and suitable to carry design loads. Expressed or open jointed cladding must not be used over steel frame. 6.5 Insulation Where R2.2 Fibreglass Insulation is specified in a system, any brand of R2.2 Fibreglass insulation which weighs 14-18kg/m 3 may be used. This insulation can be substituted with an insulation material which has higher R-value or insulation properties and has the same or more weight to comply with the minimum insulation requirements of NZBC. Check with your local building consent authority regarding the minimum regional insulation requirements for external walls and select a suitable material. In a fire rated system where a mineral insulation is specified, only James Hardie mineral insulation can be used. James Hardie mineral insulation can not be substituted with any other insulation material as it will nullify the fire test data. Refer to H1 clause of NZBC for further information on construction R-value requirements. 10 Fire and Acoustic Design Manual October 2010 New Zealand
6.6 Support 6.6.1 Bottom Plate Fixings for NZS 3604 Buildings: For buildings within the scope of NZS 3604 the bottom plates for all fire rated walls must be supported and fixed to floors using M12 bolts or proprietary fasteners as per Section 7.5.12. of NZS 3604. For the Specific Engineering Design projects (SED), it is the structural engineer/designer's responsibility to ensure that the floor and wall connections are designed/ constructed to withstand the emergency loading requirements expected as per Clause B1 of NZBC. 6.6.2 bottom Plate Fixings for Garage and Carport Boundary Walls; The external fire rated walls of garages and carports which are close to the boundary require special attention to support them after fire and avoid overturning over neighbouring property. Since these walls are not connected to the main structure, the bottom plate of these walls will require special fixings to stop them from overturning on the neighbouring property. When using James Hardie Fire Rated Systems in these applications the bottom plate of these walls must be fixed as per Figure 21. 6.7 Building Wrap or Rigid Air Barrier All external walls must have a building wrap or a rigid air barrier installed beneath the claddings. In a FRR system any building wrap that complies with Table 23 of E2/AS1 and has a Flammability Index not exceeding 5, when tested to AS 1530.2 may be used. James Hardie RAB Board will provide superior thermal insulation values when compared with building wraps. Installation of a building wrap or rigid air barrier must be in accordance with their manufacturer s recommendations and this manual. RAB Board can be used to achieve the published fire ratings where 6mm or thicker James Hardie cladding is specified. 6.8 Expansion and Control Joints Expansion joints are generally required for long continuous walls and need to be specified by the project engineer. All expansion joints must extend through the cladding, wall framing and internal lining. The control joints provided in certain types of cladding or lining products are a necessity to maintain the system s integrity and must be formed as per the product s technical literature. Some common construction details can be found in section 9 of this manual. 6.9 Control Joints Vertical control joints must be installed as per the James Hardie product technical literature. It is not necessary for all claddings to have vertical control joints e.g. Linea Weatherboard and James Hardie Weatherboards do not require vertical control joints. Villaboard Lining control joints must be provided as recommended in the Villaboard Lining technical literature. 6.10 Cladding/Lining Layout and Fixings The product layout and its fixings must be in accordance with the relevant James Hardie product literature for the cladding / lining selected. All fixings used must be as per the relevant James Hardie product technical literature for the system selected and this manual. When Villaboard Lining is installed over plasterboard, the fixing must be increased in length by the thickness of the plasterboard. ie: n Villaboard Lining fixed at 200mm centres maximum as per Villaboard Lining Installation Manual n RAB Board fixed at 200mm centres maximum as per James Hardie Rigid Air Barriers Installation Manual. n Monotek Sheet fixing not exceeding 200mm centres as per Monotek Sheet Technical Specification. n Linea Weatherboard face fixed at each stud as per Linea Weatherboard Techncial Specification. n Titan and ExoTec Facade Panel fixed at 200mm centres maximum as per Titan and ExoTec Facade Panel Rainscreen Technical Specification (Timber Cavity Battens). n When installing Titan Facade Panel over CLD Structural Cavity Battens, RAB Board must be used to achieve fire ratings. n James Hardie Weatherboards fixed at each stud as per James Hardie Weatherboards Technical Specification. n Axon Panel fixed at 200mm centres maximum as per Axon Panel Technical Specification. n Gib Fyreline fixed as per Gib systems noted within this design guide. Fixing claddings / linings to steel framing requires a steel screw which should be selected considering the thickness of cladding, steel frame and fire batten. The minimum penetration in steel frame must be 15mm. All FRR systems must be mechanically fixed. All bracing systems must be fixed in accordance with the James Hardie technical literature for the selected bracing system using stainless steel nails. James Hardie cladding or lining products can be used to achieve fire rating and structural bracing simultaneously. Horizontal control joints in claddings shall be provided at all floor joist levels as per the relevant James Hardie product technical literature. Fire and Acoustic Design Manual October 2010 New Zealand 11
6.11 Coatings and Finishes All James Hardie cladding systems require protective coatings to meet NZBC requirements. Refer to relevant James Hardie technical literature for the product selected. All claddings must be maintained in accordance with product literature. Also refer to coating manufacturer s recommendations. For FRR systems with a coating over 1mm thick designers should ensure that coatings comply with the requirements of Table 7.5 of C/AS1 of NZBC. James Hardie claddings are deemed to be non-combustible materials for the purposes of meeting the requirements of section C9.1 of C/AS1 of NZBC. 7 NZBC considerations The following performance issues have been considered when designing James Hardie Fire and Acoustic systems. Only a brief outline of the key areas in the NZBC that need to be considered when selecting fire and acoustic systems is provided in this document. It is the designers responsibility to familiarise themself with the requirements of NZBC and select the correct system for the project. Designers need to be particularly familiar with the Approved Documents for the NZBC Fire Safety Clauses C2, C3 and C4 to determine fire ratings and surface finishes required for the project. 7.1 Structure General structural requirements for framing have been covered under the framing section of this manual. 7.2 Emergency Loads The emergency loads sustained by a timber load bearing fire rated wall system constructed as per this manual comply with the requirements of NZS 3604. The structural loading capacity achieved during a fire test by the various stud sections used in the systems is available to engineers using AS/NZS 1170 design standards, Ask James Hardie on 0800 808 868 for further information. A steel framed system s emergency load carrying capacity is determined, as follows, by the formula approved by BRANZ; Design of Light Framed Walls for Fire Resistance reprint No.138, BRANZ. Where; FRR (LB) = FRR (NLB) - {Applied Load (KN/stud) / Capacity (KN/ stud)} x FRR (NLB). Where; Capacity is the normal design load for the selected stud in that application. Applied load is the load at the time of the fire. FRR (NLB) is the FRR of the initial system selected (this may be load bearing). FRR (LB) is the FRR of the system at the applied load. 7.3 Bracing The bracing systems specified in James Hardie Bracing Design Manual can easily be combined with the fire and acoustic systems by adhering to the details outlined for the relevant bracing and fire and acoustic systems. Bracing cannot be achieved when claddings are fixed with screws or when steel framing is used. 7.4 Durability James Hardie fire rated systems comply with the durability requirements of NZBC, when installed, finished and maintained in accordance to James Hardie product technical literature. It is the engineer s or designer s responsibility to ensure that the details and materials specified for the project are suitable to meet the intended durability requirements of the project. When fire rated systems are combined with bracing systems then the durability of the components must meet the 50 year durability requirement. In addition to James Hardie specifications, particular attention must be given to adhere with project design advice and the manufacturers instructions to achieve satisfactory durability of performance materials. 7.5 Fire Performance To determine the fire performance required from various walls and floor/ceiling elements of a building, the designer needs to consider the Approved Documents Fire Safety Clause C2 Means of Escape, C3 Spread of Fire, and C4 Stability in Fire of NZBC. A specialist fire engineer may be required to evaluate the fire safety requirements for a building depending upon its type and the user group. 7.6 Fire Resistance Working through the Approved Documents will determine the fire resistance rating required for walls that separates the fire cells. These ratings are expressed as Fire Resistance Rating (FRR) of a wall in minutes. Most fire rated systems included in this publication round the values back to the nearest 15 minutes. The fire engineers may occasionally need to use the actual value in some applications. If this information is required, Ask James Hardie on 0800 808 868. In the event of a fire, the fire walls provide the occupants with sufficient time to escape safely, prevent spread of fire to neighbouring property, and allow fire extinguishing operations to 12 Fire and Acoustic Design Manual October 2010 New Zealand
be completed by ensuring the wall maintains sufficient Stability, Integrity and Insulation for that period. If the project requires a wall to achieve a FRR of 60/60/60 (i.e. Stability/Integrity/Insulation) the wall will have the following characteristics: n The first 60 figure describes the wall s structural stability requirement for 60 minutes. Within this period the wall must support the structure and other fire rated elements within the same or other fire cells. A dash here indicates the wall is not a structural wall (this is typical for non-load bearing systems such as partition walls). n The second 60 figure describes the wall s integrity requirement for 60 minutes. During this period the hot gases or flames can not pass through the wall to either side. After this period a failure has occurred as the wall system under test develops cracks or openings through which hot gases and smoke can pass. n The third 60 figure describes the wall s insulation requirement for 60 minutes. After this period a failure has occurred in the wall system under test, when: a) the average temperature of the unexposed surface of the test specimen increases by more than 140 C above the initial temperature, or b) the temperature at any point on the unexposed surface increases by more than 180 C above the initial temperature. A dash here would indicate that no insulation rating as temperatures are higher than outlined early in the test. Such a system is allowed in external FRR walls that are sufficiently spaced from boundaries. The James Hardie Fire and Acoustic systems allow a wide range of framing methods and architectural systems to achieve FRR from 30/30/30 to 90/90/90. When specific fire safety design is required for a specialist application, fire engineers may Ask James Hardie on 0800 808 868 for further information. 7.7 requirements For Interior Surface Finishes Early fire hazard indices compliance is often required on exposed internal surfaces in addition to fire ratings to control the spread of fire and the amount of smoke produced by building materials used inside a building. James Hardie internal lining products such as Villaboard Lining have fire hazard indices which fall within the permitted maximum limits of Table 6.2. For further information on interior surface finish requirements refer to C/AS1 Table 6.2 of NZBC. 7.8 Heat Release Rates Of External Wall Claddings The heat release rate of external wall claddings is often required to be limited to prevent cladding materials from igniting and contributing fuel to a fire. Cladding system s requirement listed in section C/ AS1 Table - 7.5 of the Fire Safety Clause depend on height of building, Purpose Group Classification of building, and distances to property boundaries. James Hardie cladding materials have an A classification in this regard making them suitable in all situations. 7.9 External Moisture E2 According to E2/AS1 wall claddings are required to be installed either direct fixed to the framing or over the cavity battens depending on the risk score. The fire ratings published in this document are not affected whether the cladding is direct fixed or fixed over a drained cavity. When using the cavity construction method in multi unit apartment buildings, the external walls must not allow vertical fire spread through the cavity. In this case the cavity behind claddings is blocked off by running a horizontal drainage cavity batten at the floor level, where the boundaries of two fire cells lie and a Z flashing is installed. Inter-storey junction details have been provided in this literature to achieve FRR and acoustic performance levels. 7.10 Internal Moisture The FRR system published in this literature sets a minimum requirement of R-value for bulk insulation to be used for achieving the fire ratings published in this literature. The E3 Internal Moisture and H1 Energy Efficiency clauses of NZBC require the external walls of most buildings to have minimum R-values as per NZS 4218 to prevent condensation and control the energy losses. As per NZS 4218 standard the Zone 3 region requires a minimum R-Value of R2.1 for non solid construction external walls. Refer to this NZ standard for more information. 7.11 Thermal Performance The R-values provided for different systems has been calculated for the complete wall construction using Verification Method NZS 4214 and James Hardie Mineral Insulation actual test data. The calculation is based on studs at 400mm centres maximum and nogs at 800mm centres maximum. James Hardie Mineral Insulation has been tested at BRANZ to verify its physical properties and the tests indicate the following thermal resistance value. James Hardie Mineral Insulation 90mm = 2.54m 2 K/W. The density of this product is 60kg/m 3. 7.12 Acoustic Performance Airborne and Impact Sound - G6 an Approved Document of NZBC requires that buildings shall be provided with adequate noise control in common walls, floors and other elements between occupancies, habitable spaces and other occupancies or common spaces. The performance criteria requires that the sound transmission class (STC) of walls be no less than 55 and the Impact Insulation Class (IIC) for floors be no less than 55. Fire and Acoustic Design Manual October 2010 New Zealand 13
The NZBC performance criteria set a minimum requirement which may not be adequate for certain types of multi unit dwelling. Similarly many external walls may need better sound attenuation according to occupants and Resource Management Act requirements. James Hardie products can be used to achieve high sound attenuation ratings and values are presented in this manual for a range of fire rated and acoustic systems. This will help the designers to make an informed decision on the most convenient way to improve noise control for a wide range of internal and external wall applications. If attention is paid in eliminating structural bridging at location of services, flanking paths and quality of workmanship, performance laboratory results may be achieved on site. There are a number of details in section 12 of this manual to assist designers. Designers can be assured of getting better onsite results if they specify systems that have higher initial ratings and are simple to construct. Appliances, TVs and speakers should not be mounted on or near inter tenancy walls to avoid transmission of sound by vibration into the structure. 7.13 Airborne SOUND The New Zealand Standards authority published AS/NZS 1276.1 (ISO 717-1) for the calculation of Rw and Rw, tr (weighted sound reduction indices) values for airborne sound attenuation. These values are derived by testing and calculation in a similar way as the STC values are calculated and are an international update of this older sound attenuation rating system. Generally, but not always, Rw ratings are slightly more difficult to achieve and are more conservative and give a lower value than the STC rating for a given construction. This is because they consider a broader spectrum of noise with emphasis on the more difficult to manage lower frequencies. The Rw value can also be used as a reference for attenuating some forms of external noise. Rw value testing can also be expanded to cover a different band of external noise sources and is then denoted by the additional subscript tr. Depending on the ISO document this can be written as Rw+Ctr, Rtr,w and Rw, tr. This manual has both Rw and STC values for internal and external systems. External noise control in an application generally falls under the Resource Management Act and little published guidance on how to determine effective sound attenuation for external walls has been available. The acoustic designer must consider all sound flanking paths for effective external noise control in a project. 7.14 Impact Sound An impact performance criterion as per the NZBC is applicable to floor systems. James Hardie products such as HardiePanel Compressed Sheet have been commonly used in floors by acoustic engineers to improve its impact sound performance which is measured in IIC. The sound attenuation performance of ceilings is measured in STC. The IIC and STC for some common floor / ceiling systems have been given in the system details provided in this manual. 7.15 Tests And Opinions GENERAL James Hardie continuously develops and introduces new systems and reserves the right to improve those presented in this manual. FIRE James Hardie Fire and Acoustic systems have been tested at BRANZ or have been developed using the test data from various fire tests conducted and by the opinion of qualified fire engineers. The reference number of tests or opinion/assessments have been priovided in Tables 4.1 and 4.2. SOUND Where required for NZBC compliance (STC > 55) James Hardie Fire and Acoustic systems have been tested at the Acoustic Testing Service, University of Auckland, or have been conservatively derived from a very similar tested system by technical opinion from acoustic consultants Marshall Day Acoustics. Data values have been either tested or derived from models created from the test data by Marshall Day and Associates and where modeled the data has an expected accuracy of ± 3 points. 7.16 ALTERNATIVE PRODUCTS The fire and acoustic performance, durability and maintenance requirements of alternative proprietary products cannot be assured by James Hardie. Many apparently identical products were tested and rejected before selection of materials for use in the systems in this manual. Where flexibility is possible it has been reflected in the appropriate system. When a product specified in a system as per this manual is substituted, the performance of the system may be compromised. Therefore the materials specified in the system must not be substituted. 7.17 Compliance If the systems are constructed as presented in this manual without substitution or alteration then James Hardie has in the form of this manual presented a producer statement to confirm the performance of systems to the tested standards. James Hardie cannot provide opinions for actual site performance or for systems that deviate from this manual. James Hardie recommends that the specifications materials and systems presented in this manual be strictly adhered to, to avoid building consent and compliance difficulty. 14 Fire and Acoustic Design Manual October 2010 New Zealand
7.18 thermal fire batten Fire battens are used on all FRR steel stud systems and must be used between James Hardie cladding and steel framing face. For steel framing in interior/exterior applications the NZBC also requires additional external insulation to achieve adequate thermal resistance. These insulated battens are assembled on site by cutting a 100mm wide strip from 9mm thick Monotek Sheet and adhering them to a 10mm thick HDP (High Density Polystyrene). All fire battens are fixed horizontally and vertically to all steel faces. All battens must be neatly cut and tightly fitted covering all steel faces. All Thermal Fire Battens must be fitted with the polystrene to the outside face. The batten is tacked to the steel framing as shown in the following detail. Battens shall be fixed with a screw to steel frame. Thermal Fire Batten Fixing HDP 9mm Monotek strip Thermal fire batten 7.19 Referenced Documents Documents referenced in this manual are current edition and must be complied with. NZBC APPROVED DOCUMENTS B1 Structure, B2 Durability, C2 Means of Escape. C3 Spread of Fire, C4 Structural Stability during Fire, E2 External Moisture, E3 Internal Moisture, G6 Airborne and Impact Sound, H1 Energy Efficiency. STANDARDS AS/NZS 1276.1 (ISO 717-1), Airborne sound insulation NZS-AS 1530.2 Test for flammability of materials AS/NZS 1530.3, Simultaneous determination of ignitability, flame propagation, heat release and smoke release AS/NZS 3837, Method of test for heat and smoke release rates for materials and products using an oxygen consumption calorimeter AS/NZS 4200.1, Pliable building membranes and underlay. Part 1, Materials AS/NZS 4600, Cold formed steel structures NZS 3602, Timber and Wood Based Products for use in Building NZS 3603, Timber Structures Standard NZS 3604, Timber Framed Buildings NZS 3404, Steel Structural Standard NZS 1170, Structural Design Actions Standard NZS 4214, Methods of Determining the Total Thermal Resistances of parts of Buildings NZS 4218, Energy Efficiency Housing and Small Building Envelope. OTHERS BRANZ, Bulletin 402, Levels of Finish for Flush - Stopped Linings. Design of Light Framed Walls for Fire Resistance, Reprint No.138. Design of Load bearing Light Steel Framed Walls for Fire. Resistance, August 1995, School of Engineering, University of Canterbury, Christchurch. Gib Fire Rated Systems, Winstone Wallboards Limited. Gib Noise Control Systems, Winstone Wallboards Limited. Fire and Acoustic Design Manual October 2010 New Zealand 15
8 Internal walls 8.1 General All interior walls using Villaboard Lining are impact resistant, moisture resistant and achieve high levels of noise control in a minimal space. With Villaboard Lining FRR systems design flexibility with a variety of finishes is maintained while the FRR is substantially achieved by the complete wall. Inter-tenancy walls present challenges to both designers and builders. Sufficient consideration to following issues must be given by all involved in the project. All dimensions shown in tables are in millimetres. 8.2 Continuity and Isolation To achieve the required fire protection and sound attenuation on site, it requires informed design by the engineer/designer as he/she deals with the challenges of attaining adequate structural support and bracing while satisfying space utilisation requirements and the separation required for sound control. The engineer must consider the noise transmission issues when dealing with wall junctions/ joints and penetrations. An innocuous tie to gain structural stability can significantly reduce a system s sound attenuation capability. 8.3 Extent Of Wall Extreme care must be taken for an inter-tenancy FRR walls to ensure that FRR system is extended beyond the combustible elements to provide separation between two fire cells as required by NZBC. For acoustic purposes many elements in the wall perimeter can become a flanking path or attenuate sound. All details provided in this manual have been assessed by fire and acoustic experts to ensure adequate performance in both areas. The extent of FRR required must be determined by the designer before the appropriate detail is selected. 8.4 Internal Fire Rated Systems The systems presented in the following sections are primarily based on a selected fire resistance rating. For systems primarily based on sound ratings, refer to section 5.3. The designer must also ensure the fundamental rules of continuity and isolation for adequate fire and acoustic performance are adhered to. The builder also needs to adhere to seemingly insignificant details to be assured of performances approaching those achieved in a laboratory. James Hardie have provided various solutions for achieving structural support, continuity of fire protection and maintaining sound isolation simultaneously, which are detailed in section 12 of this manual. Internal 30 Minute TWO WAY Fire Rated AND ACOUSTIC Systems FRR 30/30/30 JHITGV30 n 6mm or thicker Villaboard Lining one side Refer to Villaboard Lining Installation Manual for information regarding fixing. n 10mm Gib Fyreline one side to GBTL 30 n R2.2, Fibreglass Insulation infill n Timber framing as per section 6.3 OPTIONS Stud depth (mm) 90 Villaboard Lining thickness (mm) 6 9 R W Rating 41 43 STC 42 43 Wall Width (mm) 106 109 16 Fire and Acoustic Design Manual October 2010 New Zealand
FRR 30/30/30 JHITVV30 n 6mm or thicker Villaboard Lining both sides Refer to Villaboard Lining Installation Manual for information regarding fixing. n James Hardie Mineral Insulation 90mm n Timber framing as per section 6.3 OPTIONS Stud depth (mm) 90 Villaboard Lining thickness (mm) 6 9 6mm Villaboard Lining 43/44 45/45 9mm Villaboard Lining 45/45 46/46 Wall Width (mm) 102 108 R W / STC Rating FRR 30/30/30 JHIT d VV30 n 6mm or thicker Villaboard Lining both sides Refer to Villaboard Lining Installation Manual for information regarding fixing. n James Hardie Mineral Insulation 90mm n Timber framing as per section 6.3 OPTIONS Stud depth (mm) 90 Villaboard Lining thickness (mm) 6 9 6mm Villaboard Lining 54/54 59/58 9mm Villaboard Lining 59/58 62/61 Wall Width (mm) 220 223 R W / STC Rating Fire and Acoustic Design Manual October 2010 New Zealand 17
FRR 30/30/30 JHISVV g 30 a n 6mm or thicker Villaboard Lining both sides fixed over 13mm Gib Standard Plasterboard fixed to GBS 30 Refer to Villaboard Lining Installation Manual for information regarding fixing. n Fibreglass Insulation 14 18kg/m 3 (For acoustic performance only) n Steel framing as per section 6.4 (single stud) OPTIONS Stud depth (mm) 89 Villaboard Lining thickness (mm) 6 9 6mm Villaboard Lining 53/53 54/55 9mm Villaboard Lining 54/55 55/56 Wall Width (mm) 127 133 R W / STC Rating Internal 60 Minute TWO WAY Fire Rated AND ACOUSTIC Systems FRR 60/60/60 JHITGV60 n 6mm or thicker Villaboard Lining one side Refer to Villaboard Lining Installation Manual for information regarding fixing. n 13mm Gib Fyreline one side fixed to GBTL 60 n James Hardie Mineral Insulation 90mm n Timber framing as per section 6.3 OPTIONS Stud depth (mm) 90 Villaboard Lining thickness (mm) 6 9 R W Rating 41 43 STC 42 43 Wall Width (mm) 109 112 18 Fire and Acoustic Design Manual October 2010 New Zealand
FRR 60/60/60 JHITVV60 n 6mm or thicker Villaboard Lining both sides Refer to Villaboard Lining Installation Manual for information regarding fixing. n James Hardie Mineral Insulation 90mm n Timber framing as per section 6.3 OPTIONS Stud depth (mm) 90 Villaboard Lining thickness 6 9 6mm Villaboard Lining 43/44 45/45 9mm Villaboard Lining 45/45 46/47 Wall Width (mm) 102 108 R W / STC Rating FRR 60/60/60 JHITVV g 60 a n 6mm or thicker Villaboard Lining both sides fixed over 13mm Gib Fyreline fixed to GBTL 60 on both sides Refer to Villaboard Lining Installation Manual for information regarding fixing. n Timber framing as per section 6.3 OPTIONS Stud depth (mm) 90 Villaboard Lining thickness one side (mm) 6 9 6mm Villaboard Lining 44/45 45/45 9mm Villaboard Lining 45/45 46/47 Wall Width (mm) 131 134 R W / STC Rating Fire and Acoustic Design Manual October 2010 New Zealand 19
FRR 60/60/60 JHIT d VV60 n 6mm or thicker Villaboard Lining both sides Refer to Villaboard Lining Installation Manual for information regarding fixing. n James Hardie Mineral Insulation 90mm layers in each frame n Timber framing as per section 6.3 OPTIONS Stud depth (mm) 90 Villaboard Lining thickness one side (mm) 6 9 6mm Villaboard Lining 53/54 56/57 9mm Villaboard Lining 56/57 56/57 Wall Width (mm) 238 241 R W / STC Rating FRR 60/60/60 JHIS g VV60 n 6mm or thicker Villaboard Lining both sides fixed over 13mm Gib Fyreline fixed to GBS 60 on both sides Refer to Villaboard Lining Installation Manual for information regarding fixing of Villaboard Lining. n Fibreglass Insulation 14 18Kg/m 3 (for acoustic performance only) n Steel framing as per section 6.4 OPTIONS Stud depth (mm) 89 Villaboard Lining thickness one side (mm) 6 9 6mm Villaboard Lining one side 55/55 56/57 9mm Villaboard Lining one side 56/57 57/58 Wall Width (mm) 130 133 R W / STC Rating 20 Fire and Acoustic Design Manual October 2010 New Zealand
Internal 90 Minute TWO WAY Fire Rated AND ACOUSTIC Systems FRR 90/90/90 JHITVV g 90 n 6mm or thicker Villaboard Lining both sides over 16mm Gib Fyreline each side fixed to GBTL 90 Refer to Villaboard Lining Installation Manual for information regarding fixing Villaboard Lining. n Timber studs single frame n No Insulation required for FRR OPTIONS Stud depth (mm) 90 Villaboard Lining one side (mm) 6 9 6mm Villaboad Lining one side 45/46 46/47 9mm Villaboard Lining one side 46/47 47/48 Wall Width Max. (mm) 137 140 R W / STC Rating FRR 90/90/90 JHISVV g 90 n 6mm or thicker Villaboard Lining both sides over 16mm Gib Fyreline each side fixed to GBSL 90 Refer to Villaboard Lining Installation Manual for information regarding fixing Villaboard Lining. n Steel studs single frame n Fibreglass Insulation 14 18Kg/m 3 (for acoustic performance only) OPTIONS Stud depth (mm) 89 Villaboard Lining thickness one side (mm) 6 9 6mm Villaboad Lining one side 54/55 55/56 9mm Villaboard Lining one side 55/56 56/57 Wall Width (mm) 133 139 R W / STC Rating Fire and Acoustic Design Manual October 2010 New Zealand 21
9 External walls general The external walls are required to be fire rated depending upon the situation when the wall is close to a boundary or a neighbouring property in order to comply with NZBC clause C3. The walls included in this section are load bearing walls as per NZS 3604. Special attention must be paid to junctions and penetrations in external walls. The external claddings may be required to be fixed over a cavity for certain designs and the cavity must not open into the roof space or sub floor space. The systems presented in the following sections are primarily based on the correct selection of materials. When using Linea Weatherboards in a fire rated situation the weatherboard must always be face fixed. All dimensions shown in tables are in millimetres. external 30 Minute TWO WAY Fire Rated AND ACOUSTIC Systems FRR 30/30/30 JHETGJ30 n 6mm or thicker cladding one side Refer to product technical specification for information regarding fixing. n Fire retardant building wrap n 10mm Gib Fyreline one side fixed to GBTL 30 n R2.2, Fibreglass Insulation n Timber framing as per section 6.3 OPTIONS Stud depth (mm) 90 James Hardie cladding thickness (mm) 6 7.5 9 STC / R W 41/40 41/41 42/41 R Value 1.91+ NOTE: 13mm Gib plasterboard can also be used in lieu of 10mm Gib Fyreline. Fix as per GBTL 30b FRR 30/30/30 JHETJJ30 n 6mm or thicker cladding both sides or James Hardie cladding one side and 6mm or thickerjames Hardie lining on other side Refer to product technical specification for information regarding fixing. n Fire retardant building wrap n James Hardie Mineral Insulation 90mm n Timber framing as per section 6.3 OPTIONS Stud depth (mm) 90 James Hardie cladding thickness (mm) 6 7.5 9 6mm Villaboard Lining 39/40 41/42 44/43 9mm Villaboard Lining 43/42 43/42 43/43 R Value 2.04+ R W / STC Rating 22 Fire and Acoustic Design Manual October 2010 New Zealand
FRR 30/30/30 JHESJJ30 n 6mm or thicker cladding both sides or James Hardie cladding one side and James Hardie Lining on other side Refer to product technical specification for information regarding fixing. n Fire retardant building wrap n James Hardie Mineral Insulation 90mm n Thermal fire batten fixed to framing externally n Steel framing as per section 6.4 OPTIONS Stud depth (mm) 89 James Hardie cladding thickness (mm) 6 7.5 9 STC / R W (with 9mm James Hardie product on one side) 42/44 45/46 47/47 R Value 2.04+ FRR 30/30/30 JHETGL30 n Linea Weatherboard cladding one side Refer to product technical specification for information regarding fixing. n Fire retardant building wrap n Villaboard Lining or 10mm Gib Fyreline one side fixed to GBTL 30 n R2.2 Fibreglass Insulation n Timber framing as per section 6.3 n Linea Weatherboard fixed through the face OTHER INFORMATION Stud depth (mm) 90 James Hardie cladding (mm) 16 STC / R W 43/43 R Value 1.93+ Fire and Acoustic Design Manual October 2010 New Zealand 23
FRR 30/30/30 JHETJL30 n 6mm or thicker cladding/lining one side Refer to product technical specification for information regarding fixing. n Fire retardant building wrap n R2.2 Fibreglass Insulation n Timber framing as per section 6.3 n Linea Weatherboard fixed through the face OPTIONS Stud depth (mm) 90 James Hardie cladding (mm) 16 STC/R w 46/45 R Value 1.94+ FRR 30/30/30 JHETLL30 n Linea Weatherboard both sides fixed through the face Refer to Linea Weatherboard Technical Specification for information regarding fixing. n Fire retardant building wrap both sides n R2.2 Fibreglass Insulation n Timber framing as per section 6.3 OPTIONS Stud depth (mm) 90 James Hardie cladding (mm) 16 STC/R w 46/46 R Value 1.97+ 24 Fire and Acoustic Design Manual October 2010 New Zealand
external 60 Minute TWO WAY Fire Rated AND ACOUSTIC Systems FRR 60/60/60 JHETGJ60 n 6mm or thicker cladding one side Refer to product technical specification for information regarding fixing. n Fire retardant building wrap n 13mm Gib Fyreline one side fixed to GBTL 60 n James Hardie Mineral Insulation 90mm n Timber framing as per section 6.3. OPTIONS Stud depth (mm) 90 James Hardie cladding thickness (mm) 6 7.5 9 STC / R W 42/41 43/42 43/42 R Value 2.08+ FRR 60/60/60 JHETJJ60 n 6mm or thicker cladding both sides or James Hardie cladding one side and James Hardie Lining on other side Refer to product installation manual / technical specification for information regarding fixing. n Fire retardant building wrap n James Hardie Mineral Insulation 90mm n Timber framing as per section 6.3 OPTIONS Stud depth (mm) 90 James Hardie cladding thickness (mm) 6 7.5 9 6mm Villaboard Lining 39/40 41/42 44/43 9mm Villaboard Lining 43/42 43/42 43/43 R Value 2.04+ R W / STC Rating Fire and Acoustic Design Manual October 2010 New Zealand 25
FRR 60/60/60 JHESGJ60 n 6mm or thicker cladding on one side and lining on other side Refer to product installation manual / technical specification for information regarding fixing. n Fire retardant building wrap n 13mm Gib Fyreline one side fixed to GBSL 60 n James Hardie Mineral Insulation 90mm n Steel framing as per section 6.4 n Thermal Fire batten under cladding OPTIONS Stud depth (mm) 89 James Hardie cladding thickness (mm) 6 7.5 9 STC / R W 40/33 42/33 42/34 R Value 2.10+ FRR 60/60/60 JHETGL60 n Linea Weatherboard cladding one side Refer to Linea Weatherboard Technical Specification for information regarding fixing. n Fire retardant building wrap n 13mm Gib Fyreline lining one side fixed to GBTL 60 n R2.2 Fibreglass Insulation n Timber framing as per section 6.3 n Linea Weatherboard fixed through the face OTHER INFORMATION Stud depth (mm) 90 James Hardie cladding thickness (mm) 16 STC / R W 44/44 R Value 1.95+ 26 Fire and Acoustic Design Manual October 2010 New Zealand
FRR 60/60/60 JHETLL60 n Linea Weatherboard both sides fixed through the face Refer to Linea Weatherboard Technical Specification for information regarding fixing. n Fire retardant building wrap both sides n James Hardie Mineral Insulation 90mm n Timber framing as per section 6.3 OPTIONS Stud depth (mm) 90 James Hardie cladding (mm) 16 STC / R W 46/46 R Value 2.11+ external 90 Minute Fire Rated Systems FRR 90/90/90 JHETGL90 n Linea Weatherboard cladding fixed over RAB Board Refer to product installation manual / technical specification for information regarding fixing. n 16mm Gib Fyreline lining one side fixed to GBTL 90 n James Hardie Mineral Insulation 90mm n Timber framing as per section 6.3 n Linea Weatherboard fixed through the face OTHER INFORMATION Stud depth (mm) 90 James Hardie cladding thickness (mm) 16 STC / R W 45/45 R Value 2.15+ Fire and Acoustic Design Manual October 2010 New Zealand 27
10 RAB Board General Where a RAB Board is used in lieu of a building wrap then the fire rating can be achieved without relying on the cladding product. RAB Board is suitable to achieve a fire rating up to 60 minutes as per fire rated system described below. When RAB Board is used for fire rating, any cladding material can be used over RAB Board such as Monotek Sheet, Linea Weatherboard, timber weatherboard, brick or ply wood etc. These claddings can either be direct fixed or fixed onto a timber cavity batten over RAB Board. The cavity must not open into the roof or sub floor spaces. Special attention must be paid to junctions and penetrations through external walls. When RAB Board is used in conjunction with Linea Weatherboard cladding, a 90 minute fire rating can be achieved. Refer to JHETGL90 system for further details. When the external wall is close to a boundary, the requirement of peak heat release rate as per Table 7.5 clause C/AS1 of NZBC must be considered before selecting a cladding. Always fix the cladding as per their manufacturers recommendations. FRR 30/30/30 JHETGR30 n 6mm RAB Board exterior side Refer to James Hardie Rigid Air Barriers Installation Manual for information regarding fixing. n 10mm Gib Fyreline on side fixed to GBTL 30 n R2.2 Fibreglass Insulation n Timber framing as per section 6.3 n Cladding as per manufacturers recommendations OPTIONS Stud depth (mm) 90 James Hardie cladding (mm) 16 STC / R W 41/40 R Value 1.95+ FRR 60/60/60 JHETGR60 n 6mm RAB Board exterior side Refer to James Hardie Rigid Air Barriers Installation Manual for information regarding fixing. n 13mm Gib Fyreline on side fixed to GBTL 60 n James Hardie Mineral Insulation 90mm n Timber framing as per section 6.3 n Cladding as per manufacturers recommendations OPTIONS Stud depth (mm) 90 James Hardie cladding (mm) 16 STC / R W 42/41 R Value 2.10+ 28 Fire and Acoustic Design Manual October 2010 New Zealand
11 Internal floors/ ceilings HardiePanel Compressed Sheet used as flooring over the floor joists is suitable to achieve fire and acoustic rated floors. The floor joists must comply with NZS 3604 span tables or the specific engineering design. Refer to Flooring Installation Manual for installing HardiePanel Compressed Sheet. Floor coverings have a significant contribution in enhancing the IIC rating of floor / ceiling system e.g. a floor having carpet covering will provide a lot better IIC rating when compared to ceramic tiles. Using an acoustic insulation within the floor joists improves the acoustic performance. The IIC ratings for the following systems have been calculated considering carpet covering over the HardiePanel Compressed Sheet. The products specified in these systems must be installed in accordance with their manufacturer s specifications. FRR 15/15/15 JHFTGJ15 n HardiePanel Compressed Sheet n 13mm Gib Standard Plasterboard ceiling fixed to GBFC 15 n Timber floor joists 150 x 50mm @ 600mm c/c n Timber framing as per section 6 OTHER INFORMATION STC/IIC 45/36 Overall Floor Depth approximately 176 System Weight approximately 50kg/m 2 FRR 45/45/45 JHFTGJ45 n HardiePanel Compressed Sheet n 13mm Gib Fyreline ceiling fixed to GBFC 45 n Timber floor joists 200 x 50mm @ 600mm c/c n Timber framing as per section 6 OTHER INFORMATION STC/IIC 45/36 Overall Floor Depth approximately 226 System Weight approximately 50kg/m 2 Fire and Acoustic Design Manual October 2010 New Zealand 29
FRR 60/60/60 JHFTGJ60 n HardiePanel Compressed Sheet n 16mm Gib Fyreline ceiling fixed to GBFC 60 n Timber floor joists 200 x 50mm @ 600mm c/c n Timber framing as per section 5 OTHER INFORMATION STC/IIC 45/36 Overall Floor Depth approximately 230 System Weight approximately 50kg/m 2 30 Fire and Acoustic Design Manual October 2010 New Zealand
12 Construction details Study the James Hardie fixing manual for the cladding or lining system to be used. Obtain the FRR or acoustic system specification required on your project. This should provide you with a specification number which clearly indicates the FRR performance required to be achieved. Additionally, the cladding or lining thickness required to obtain the desired sound attenuation should also be clearly specified. The specification corresponding to the number, FRR and framing specified can be quickly located using the system index in section 4 of this manual. Study section 8 and 9 to ensure the basic requirements for the system specified. Those basic requirements together with the following details will give you sufficient information to ensure the system you construct will provide the desired fire and acoustic performance. 12.1 FRAMING The framing must be erected as per the requirements of this specification. If any alterations are made to the timber frame setout, ensure that the designer is informed. Set-out joints and control joints are planned as per the relevant James Hardie technical specification. n Timber framing must either be fixed as per NZS 3604 or SED specifications. n Check erected frame for straightness. To achieve the desired aesthetic results it must be in accordance with NZS 3604. n Minimum timber stud size required is 90 x 45mm. Note: Accuracy of nogs / dwangs spacing at 800mm is important to ensure the tight fit of the insulation. 12.2 BUILDING WRAP / RAB BOARD All external James Hardie claddings must have building wrap or RAB Board installed beneath it. Refer to project specifications and this manual for more details. Installation of building wrap or RAB Board must be as per the manufacturer s recommendations and this manual. 12.3 INSULATION FIBREGLASS INSULATION Fit the specified insulation tightly in all framing cavities against the building wrap. Always ensure that the building wrap is not pushed out of the framing plane as it will tend to block off the cavity drainage where the cladding is fixed over cavity battens. JAMES HARDIE MINERAL INSULATION If you are not familiar with James Hardie Mineral Insulation then you must read section 13.1 on safe working practices, storage and handling of this product. The pre-cut sizes are 50mm bigger in length and width than the cavity size to ensure a tight friction fit in the cavity. If the cavity to be insulated is smaller than the size of insulation supplied, the insulation may be cut to fit to size. Ensure that insulation is at least 50mm bigger in each direction than the size of frame cavity to be filled so that a tight friction fit is achieved. 12.4 JAMES HARDIE CLADDING OR LINING Use any standard jointing details as described in the appropriate James Hardie technical specifications. Note that expressed joints cannot exceed a maximum of 10mm in width vertically or horizontally. The expressed jointing system followed doesn t affect the fire ratings in timber frame construction but this jointing option must not be used with steel frame construction. 12.5 CAVITY CONSTRUCTION The fire ratings are not affected when the James Hardie cladding is fixed using a timber cavity batten construction method. Follow the cavity construction specification developed for each cladding materials supplied by James Hardie. The fire rated performance of a cladding fixed using a timber cavity construction has been assessed by BRANZ under FAR562. A horizontal separation in the cavity must be provided at the floor levels where there are two separate tenancies one over the other. Titan Facade Panel and Axon Panel when fixed to CLD Structural Cavity Batten must be installed over RAB Board to achieve the fire rating. 12.6 gib STANDARD PLASTERBOARD and gib Fyreline LINING Gib standard plasterboard and Gib Fyreline linings where specified in the system must be installed as per Winstone Wallboards technical literature. 12.7 Services penetrations The penetration through a fire and acoustic rated wall must be carefully detailed and constructed. The minimum distance between penetration edges and studs must be 50mm and the minimum distance between adjacent penetration edges must be 300mm. Baffles, where required, must extend 300mm above and below outlets and extend the full width between studs. Holes or penetrations for electrical cable or pipes etc, be suitably sealed with Flamex One sealant or similar intumescent product and must have a flashing collar to cover the penetration on external side. Penetrations in Gib plasterboard internal lining must be in accordance with their technical literature requirements. Electrical boxes (power point and light switch) require careful attention to maintain fire and acoustic ratings. Minor air gaps around the boxes can greatly reduce the acoustic performance of wall systems. Meter box must also be suitably fire rated to match the fire rating of a wall. 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 meet the acoustic attenuation level specified for the wall. Fire and Acoustic Design Manual October 2010 New Zealand 31
13 Construction details Table 1 Description Figure Page Lining / Cladding Fixing and Layout 1 33 Weatherboard Fixing and Layout 2 33 Direct Fix Cladding Foundation 3 34 Cavity Fix Cladding Foundation 4 34 Simple Span Timber Floor to Timber Intertenancy Wall 5 35 Diaphragm TImber Floor to Timber Intertenancy Wall 6 35 Timber Floor Joists Parallel to Intertenancy Wall 7 36 Concrete Slab to Timber Intertenancy Wall 8 36 Split Level Floor to TImber Intertenancy Wall 9 37 Floor to Lining Seal Detail 10 37 Timber Wall Deflection Head to Concrete Slab 11 38 Sub Floor Partition 12 38 Intertenancy to External James Hardie Cladding T 13 39 Double Frame to Single T Internal 14 39 Intertenancy Timber Wall to Concrete T 15 40 Intertenancy to External Masonry Intersection 16 40 Roof Junction to Firewall 17 41 Intertenancy Fire Separation Horizontal Joint 18 41 30 Minute Fire Rated Soffit 19 42 60 Minute Fire Rated Soffit 20 42 Boundary Wall Bottom Plate Fixing 21 43 32 Fire and Acoustic Design Manual October 2010 New Zealand
Figure 1: Lining / Cladding Fixing and Layout Figure 2: Weatherboard Fixing and Layout Fire and Acoustic Design Manual October 2010 New Zealand 33
Figure 3: Direct Fix Cladding Foundation Figure 4: Cavity Fix Cladding Foundation 34 Fire and Acoustic Design Manual October 2010 New Zealand
Figure 5: Simple span timber floor to timber intertenancy wall Figure 6: Diaphragm timber floor to timber intertenancy wall Fire and Acoustic Design Manual October 2010 New Zealand 35
Figure 7: Timber floor joists parallel to intertenancy wall Figure 8: Concrete slab to timber intertenancy wall 36 Fire and Acoustic Design Manual October 2010 New Zealand
Figure 9: Split level floor to timber intertenancy wall Figure 10: Floor to lining seal detail Fire and Acoustic Design Manual October 2010 New Zealand 37
Figure 11: Timber wall deflection head to concrete slab Figure 12: Sub floor partition 38 Fire and Acoustic Design Manual October 2010 New Zealand
Figure 13: Intertenancy to external James Hardie Cladding T Figure 14: Double frame to Single T internal Fire and Acoustic Design Manual October 2010 New Zealand 39
Figure 15: Intertenancy timber wall to concrete T Figure 16: Intertenancy to external masonry intersection 40 Fire and Acoustic Design Manual October 2010 New Zealand
Figure 17: Roof junction to firewall Figure 18: Intertenancy Fire Separation Horizontal Joint Fire and Acoustic Design Manual October 2010 New Zealand 41
13.1 JAMES HARDIE FIRE RATED BOUNDARY WALL AND SOFFITS CONSTRUCTION The following construction will provide FRR Soffits which should be used in conjunction with James Hardie FRR exterior systems. These soffit systems have been assessed by BRANZ under FAR2597. Figure 19: 30 minute fire rated soffit Figure 20: 60 minute fire rated soffit 42 Fire and Acoustic Design Manual October 2010 New Zealand
Figure 21: Garage/Carport Boundary Wall Bottom Plate Fixing Fire and Acoustic Design Manual October 2010 New Zealand 43
14 Safe working practice WARNING DO NOT BREATHE DUST AND CUT ONLY IN WELL VENTILATED AREA James Hardie products contain sand, a source of respirable crystalline silica which is considered by some international authorities to be a cause of cancer from some occupational sources. Breathing excessive amounts of respirable silica dust can also cause a disabling and potentially fatal lung disease called silicosis, and has been linked with other diseases. Some studies suggest smoking may increase these risks. During installation or handling: (1) work in outdoor areas with ample ventilation; (2) minimise dust when cutting by using either score and snap knife, fibre cement shears or, where not feasible, use a HardieBlade Saw Blade and dust-reducing circular saw attached to a HEPA vacuum; (3) warn others in the immediate area to avoid breathing dust; (4) wear a properly-fitted, approved dust mask or respirator (e.g. P1 or P2) in accordance with applicable government regulations and manufacturer instructions to further limit respirable silica exposures. During clean-up, use HEPA vacuums or wet cleanup methods never dry sweep. For further information, refer to our installation instructions and Material Safety Data Sheets available at www.jameshardie.co.nz. Failure to adhere to our warnings, material safety data sheets, and installation instructions may lead to serious personal injury or death. James Hardie recommended safe working practices cutting outdoors 1. Position cutting station so wind will blow dust away from user or others in working area. 2. Use one of the following methods based on the required cutting rate: Best Score and snap Hand guillotine Fibreshear Good Dust reducing circular saw equipped with HardieBlade Saw Blade and HEPA vacuum extraction. cutting INDOORS Cut only using score and snap, hand guillotine or fibreshears (manual, electric or pneumatic). Position cutting station in a well-ventilated area. drilling/other machining When drilling or machining you should always wear a P1 or P2 dust mask and warn others in the immediate area. important notes For maximum protection (lowest respirable dust production), James Hardie recommends always using Best level cutting methods where feasible. NEVER use a power saw indoors. NEVER use a circular saw blade that does not carry the HardieBlade logo. NEVER dry sweep Use wet suppression or HEPA vacuum. NEVER use grinders. ALWAYS follow tool manufacturers safety recommendations. P1 or P2 respirators can be used in conjunction with above cutting practices to further reduce dust exposures. Additional exposure information is available at www.jameshardie.co.nz to help you determine the most appropriate cutting method for your job requirements. If concern still exists about exposure levels or you do not comply with the above practices, you should always consult a qualified industrial hygienist or contact James Hardie for further information. 44 Fire and Acoustic Design Manual October 2010 New Zealand
WORKING INSTRUCTIONS Refer to recommended safe working practices before starting any cutting or machining of product. Score and snap Score and snap is a fast and efficient method of cutting James Hardie building products using special tungsten tipped score and snap knife. Preferably score on the face side of the product. Score against a straight edge and repeat the action to obtain adequate depth for clean break normally one third of sheet thickness. Snap upwards to achieve break. Smooth any rough edges with a rasp. Hand guillotine Make guillotine cut on the off-cut side of line to allow for the thickness of the blade. Fibreshear heavy duty by Hitachi An electrically powered, fast, clean and effortless way of cutting James Hardie building products, especially around curves such as archways. Make fibreshear cut on the off-cut side of the line to allow for the thickness of the shear. HardiEBlade saw blade The HardieBlade saw blade used with a dustreducing saw connected to a HEPA vacuum allows for fast, clean cutting of James Hardie fibre cement products. A dust-reducing saw uses a dust deflector or a dust collector which can be connected to a vacuum system. When sawing, clamp a straight-edge to the sheet as a guide and run the saw base plate along the straight edge when making the cut. Hole-Forming For smooth clean cut circular holes: Mark the centre of the hole on the sheet. Pre-drill a pilot hole. Scored edge Straight edge Using the pilot hole as a guide, cut the hole to the appropriate diameter with a hole saw fitted to a heavy duty electric drill. STORAGE AND HANDLING To avoid damage, all James Hardie building products should be stored with edges and corners of the sheets protected from chipping. James Hardie building products must be installed in a dry state and protected from rain during transport and storage. The product must be laid flat under cover on a smooth level surface clear of the ground to avoid exposure to water, moisture, etc. QUALITY James Hardie conducts stringent quality checks to ensure any product manufactured falls within our quality spectrum. It is the responsibility of the builder to ensure the product meets aesthetic requirements before installation. James Hardie will not be responsible for rectifying obvious aesthetic surface variations following installation. 13.1 JAMES HARDIE MINERAL INSULATION STORAGE James Hardie mineral wool should be stored in the packaging provided in a clean dry space where it will not get wet, knocked or damaged. HANDLING AND SAFETY Protective clothing must be worn when handling this product. OSH Health and Safety Guidelines for the Selection and Safe Handling of Synthetic Mineral Fibres requires lightweight nylon overalls, gloves, appropriate eye protection and a respirator with a minimum of a class P1 filter. Handling the product as if it is fragile will greatly reduce the potential dust creation and loose fibres. A MSDS is available by visiting www.jameshardie.co.nz or Ask James Hardie on 0800 808868. CUTTING A straight edge and stiff blade knife or similar will neatly cut this product with the minimum of dust creation. OTHER MATERIALS Manufacturers instructions and specifications must be strictly followed for all products not supplied by James Hardie. All Gib products must be handled as per Gib For irregular holes: Small rectangular or circular holes can be cut by drilling a series of small holes around the perimeter of the hole then tapping out the waste piece from the sheet face. Tap carefully to avoid damage to sheets, ensuring the sheet edges are properly supported. Fire and Acoustic Design Manual October 2010 New Zealand 45
15 Product information and accessories Table 2 - Accessories/tools supplied by James Hardie Accessories Description Quantity/Size (approx) James Hardie Mineral Insulation 600 x 800 x 90 mm 2.4m 2 per bale Sku: 304904 400 x 800 x 90 mm 1.6m 2 per bale Sku: 304905 Claddings or linings as per the relevant James Hardie product literature Table 3 - Accessories/tools not supplied by James Hardie James Hardie recommends the following products for use in conjunction with James Hardie products. James Hardie does not supply these products and does not provide a warranty for their use. Please contact component manufacturer for information on their warranties and further information on their products. Accessories Description Vapour permeable sarking Must comply with E2/AS1 requirements. HardieFlex Nail galvanised or stainless steel. Flexible tape A flexible self-adhesive tape used in preparation of a window. e.g. Protecto, Aluband, Tyvek, Flexwrap, etc. Finishing Nailer Gas or pneumatic finishing nailer for fixing PEF Rod Used to form an air seal between the window liner and window opening frame. Inseal Strip 3109 Used for sealing around window jambs. Head Flashing compliant with E2 Material must comply with E2/AS1 requirements. Sealant Fire retardant / acoustic sealant to seal the joints. Refer to sealant manufacturer s recommendations before applying. Thermal Fire Battens The battens are made by cutting a 100mm wide strip from 9mm thick Monotek Sheet and adhering a 10mm thick HDP (high density polystyrene) to the strip. Gib Fyreline Gib Standard Plasterboard FRR Penetrations Protecto Wrap, Aluband, Tyvek, Flexwrap are trademarks registered to their owners 46 Fire and Acoustic Design Manual October 2010 New Zealand
16 Warranties For full product specific warranties, please refer to the relevant product technical specification or installation manual. They are also available for download at www.jameshardie.co.nz or simply Ask James Hardie on 0800 808 868. Notes Fire and Acoustic Design Manual October 2010 New Zealand 47
Copyright October 2010. James Hardie New Zealand Limited.TM and denotes a Trademark or Registered Mark owned by James Hardie Technology Limited.