SECTION ‘C’ Timber Frame Wall Systems. Contents.

1 The Red Book Frame Wall Stud Height TablesC2 IntroductionC3 Design ConsiderationsC3 InstallationC4 ComponentsC5 system SpecificationsSingle StudC6 C8 Double StudC9 C10 Party WallC11 Staggered StudC12 C13 Resilient Mount & FurringC14 Single SidedC15 External WallsC16 C21 Column & BeamC22 system Installation DetailsC23 C28 SECTION C Red Book TABLE C1. MAXIMUM Timber STUD LOADBEARING WALLSSHEETED WITH NON FIRE GRADE GYPROCK Distributed Load (UDL) = Stud Height (m) F5F8F11 MGP 10 MGP 12 MGP 15600mm max. cts450mm GradeStud Thickness (mm)Stud Depth (mm)709012070901207090120 NOTES FOR TABLE C1 AND heights have been determined based on a maximum deflection of H 240 or 30mm at 1350mm maximum centres, measured vertically. No noggings in staggered stud walls .

2 No connectionbetween wall leaves in double stud Frameand Stud Height (m) F5F8F11 MGP 10 MGP 12 MGP 15600mm max. cts450mm GradeStud Thickness (mm)Stud Depth (mm)709012070901207090120 Wall Frameand SheetingConfigurationTABLE C2. MAXIMUM Timber STUD LOADBEARING WALLSSHEETED WITH GYPROCK FIRE GRADE Distributed Load (UDL) = Red Book Gyprock & Fibre Cement (GFC) timberframe wall systems are assemblies constructed fromtimber components with one or more layers ofGyprock plasterboard and/or CSR Fibre Cementlinings fixed to one or both wide range of systems is available including firerated walls , internal and external walls , and for loadbearing Frame wall systems are typically used inmulti-residential walls must be designed for the applied is given for the selection of studs in non-loadbearing internal walls only.

3 For loadbearing wallsand walls subject to wind pressures, walls shall bedesigned to the appropriate Australian Standards orconstruction Loadbearing wall height and the required stud sizemay be selected from Table C1 or C2 appropriate forthe selected system . These walls are designed for lateralloads only, using the composite action of the Frame load bearing walls in this manual have beendesigned as follows for aminimum design pressure and a maximum deflection of (height 240) or30mm maximum. (Based on BCA Specification , (b)).Wall plates must be fixed to floors and ceilings at600mm maximum centres. Each plate fixing isrequired to withstand a shear load of for aUDL of multi-residential buildings often have operabledoors and windows, resulting in internal walls beingsubject to wind pressure.

4 In these cases, walls must bedesigned for the appropriate loads. Loadbearing designed as load bearing, with studs at600mm maximum centres and lined with GYPROCKFYRCHEK, meet the requirements of BCAS pecification Clause walls building designer must ensure load bearingwalls have been designed: To resist all applied loads. To be in accordance with or AS1684. Assuming no contribution to axial strength isrequired of the wall linings. For bracing capacities in accordance with brochureN GYP 545 To meet the stated Fire Resistance Level (FRL), theaxial load capacity of some wall systems is is a result of loss of stud SECTION from charringduring a fire test. The systems are noted with an AxialCapacity Reduction (ACR) Group number.

5 In thesesystems, the designer must increase the applied loads tocompensate for the axial capacity reduction percentage,as shown in Table Timber Frame wall systems in this manual aresuitable for the stated FRL when designed inaccordance with the structural considerations fire design of Timber framing is based on theprinciple that a particular level of char is acceptablewithout compromising the performance of the GFC has carried out testing to verify the charlimit, and where it is exceeded, the allowable axialcapacity of the stud is reduced to account for the lossof SECTION . For more information regarding the fireresistance of Timber stud walls , refer to BRANZ assessment FAR 2303.

6 To protect structural Timber and steel beams andcolumns within a wall, the FRL of the wall systemmust be at least equivalent to that required by thestructural member. For example, a wall system withFRL 90/90/90 provides FRL 90/ / for a steelcolumn within the wall. TABLE C3. AXIAL CAPACITY REDUCTION (%) DUETO THE EFFECT OF Timber SizeGroup 1 Group 2 Group 390x450%0%25%90x350%10%30%70x453%25%40%7 0x358%35%45% Red Book Framing & stud walls required to have an FRL mustcomply with the following: Studs must be minimum 70 x 35mm and spaced at600mm maximum centres. Wall plates must be fixed to the fire rated supportstructure with steel fasteners such as expansionanchors, easy drive masonry anchors and powerdriven fasteners.

7 Plasterboard must be screw or nailfixed only, adhesive is not permitted. In wet areas, Gyprock Fyrchek MR must be usedin lieu of Gyprock Fyrchek . For single layer applications, butt joints must bebacked by either a stud or nogging. Horizontalrecessed joints must be backed by a nogging oroffset at least 300mm on opposite sides of the wall. For double layer vertically sheeted applications, buttjoints may be reinforced using laminating screwswithout the need for framing support. Joints in the outer layer of all systems lined withplasterboard or Wallboard must be set withGyprock paper tape. As a minimum, a single coatfinish may be used. Joints in external systems lined with CSR FibreCement Texture Base Sheet must be set with thetape and compound recommended for the texturecoating systemFor general installation information refer to FIG C2to C10.

8 For information on Frame design and detailing,including treatment at junctions, sub floor and roofareas, cavity barriers and penetrations, refer to NationalTimber Development Council publication Multi-Residential Timber Framed Fire Resistance Level (FRL) of the systemsdetailed in this SECTION will not be detrimentallyaffected by; Increasing the thickness of the wall. Increasing the cross-sectional dimensions of theframing elements. Decreasing the stud spacing; or Decreasing the fixing centres of wall sheetmaterials. The inclusion of bulk cavity insulation materialssuch as Glasswool, Rockwool and Polyester. The use of Fyrchek MR plasterboard in lieu ofFyrchek plasterboard of the same thickness.

9 Additional layers of plasterboard or CSR FibreCement. Curved walls (in plan) with a radius of curvature noless than 3m. The addition of a Timber cladding. The addition of any cladding meeting BCA Clause attain the specified FRL, all perimeter gaps andpenetrations must be carefully and completely filledwith appropriate caulking material. CSR Gyprock FireMastic or other tested fire and acoustic rated materialof equivalent or better performance must be for fire sealing of penetrations is given inSection Z .Vermiculite plaster has no capacity to accommodatebuilding movement may not be suitable for use as ageneral purpose fire rated caulking. Its use is specifiedin some wall/ceiling junctions; refer to GyprockCeiling Systems Installation Guide, N GYP 570.

10 ACOUSTIC acoustic performance of wall systems isexpressed in terms of Rwand Rw+Ctrwhereappropriate. The performance of the as-built systemmay be affected by: sound flanking, the effectiveness ofworkmanship and caulking, the presence and treatmentof penetrations, and the inclusion of structuralelements and bridging items. Refer to SECTION A fordetailed information on addressing these Notes The acoustic performance of systems may beadversely affected by the use of wider studs orcloser spacings than that specified. The acoustic performance of CSR wall systems isnot adversely affected by the order of lining sheetsthat are fixed direct to framing. In non-fire rated systems, to attain the statedacoustic performance, use CSR Gyprock Wet AreaAcrylic Sealant, CSR Gyprock Fire Mastic or othertested acoustic rated material of equivalent or detailed information on wall junctions,intersections, Frame attachments and penetrations, referto SECTION Z of this curved in plan may be built with Timber studframes.