3275 prima plank technical manual v2 · finishes recommendation 16 contents designed to attain pure...

Technical Manual

plank™

3.1 General is suitable for general wall cladding application when a lightweight wall system is preferred. The usage includes construction of new buildings such as residential dwellings and resorts. In addition, can also be used for renovation/ extension of existing buildings especially in the construction of upper storey.

3.2 Framing Construction

must be supported at 600mm maximum centres. Refer Figure 2. The minimum stud face width shall be as follows:-

• Timber framing - 50mm min.• Steel framing - 35mm min.

Timber framing is typically 50mm x 75mm and light-gauge metal framing is typically 35mm x 64mm x 0.55mm BMT.

When on-stud jointing is preferred, stud face width must be increased to provide for adequate edge fixing distance. Use frame off-cuts to pack stud at plank joint if required.

3.3 FlashingWhen applied as external wall cladding it is a good building practice to apply flashing material at corners, above the head and under the sill of an opening.

3.4 SarkingDuring windy condition, the external pressure would generally be greater than the building's internal pressure. The pressure differential will likely draw water into the wall cavity through the plank's joints and laps. It is recommended to install vapour permeable sarking between and the framing surface. The use of reflective sarking will enhance the thermal insulation property of the cladding system.

3.5 Plank OverlapsFor external cladding applications, plank must overlap the previous course by a minimum of 25mm. Plank overlap may be increased to achieve the desired exposed plank surface. Higher overlaps may also improve the weatherproofing of a framed-wall particularly when sarking material is not applied. When necessary, overlap may be increased to obtain full-course planking to match the wall height.

To facilitate plank installation with consistent overlaps, use a lap gauge. A lap gauge can be fabricated from off-cuts or timber piece. Refer Figure 3.

3.7 Fixing to TimberWhen applied onto timber framing, must be nailed at centre of overlap through both thicknesses, as shown in Figure 4.

3.8 Fixing to SteelPlanks are screwed to light gauge steel framing through the top plank only. Refer Figure 5.

3.9 JointsJoint options are shown below. When applied as wall cladding, plank joints should preferably be staggered between each plank course.

"off-stud" jointing method incorporates proprietary PVC jointer between plank ends. Refer Figure 6.

On-stud jointing can be done by butt jointing plank ends with moderate contact. Alternatively, provide a nominal 3mm gap and seal joint with exterior grade paintable/ flexible sealant. Refer Figure 7.

3.10 Ground ClearanceProvide a minimum of 150mm clearance between bottom edge of plank (or starter strip) and the earth as shown in Figure 8.

3.11 CornersInternal and external corners may be finished with timber stops as illustrated in Figure 9.

Alternatively, when timber posts are utilized, plank ends abutted to the side of the posts. Refer Figure 10.

3.12 Details at OpeningsWhen applying plank at around window or door openings, allow an approximately 5mm clearance at the sill, jamb and head. Seal gap with paintable/ flexible sealant Do not apply sealant between head flashing and plank edge.

Co

nte

nts Designed to attain pure luxury

Aesthetic Cladding | Decorative Fencing | Gable End Cladding | External Wall Cladding |Fascia Board | Decking | Flooring | Ceiling | Eaves Lining

plank™

1. Introduction 03

1.1 General

1.2 Applications

1.3 Features & Benefits

1.4 Tests and Certification

2. General Fixing Instructions 03

2.1 Material Selection

2.2 Framing Specification

2.3 Batten Specification

2.4 Fasteners

2.5 Sealing Joints & Gaps

2.6 Jointing Against Other Materials

3. External Wall & Gable End Cladding 04

3.1 General


3.3 Flashing

3.4 Sarking

3.5 Plank Overlaps

3.6 Installation Procedures

3.7 Fixing to Timber

3.8 Fixing to Steel

3.9 Joints

3.10 Ground Clearance

3.11 Corners

3.12 Details at Openings

4. Cladding to Masonry Wall 07

4.1 General

4.2 Battening Requirement

4.3 Installation Method

4.4 Sarking

4.5 Jointing

4.6 Corners

4.7 Openings

4.8 Wall to Eaves Junction




















5. Fascia Board 09

5.1 General

5.2 Support

5.3 Installation

5.4 Joints

6. Decorative Fencing 106.1 General

6.2 Framing Requirememt

6.3 Installation

10. Working Instructions 1610.1 Cutting

10.2 Drilling

10.3 Handling & Stroage

11 7. Ceiling & Eaves Lining7.1 Genaral


7.3 Installation

138. Decking / Flooring8.1 Genaral


8.3 Installation

9. Finishes Recommendation 16

Co

nte

nts Designed to attain pure luxury

Aesthetic Cladding | Decorative Fencing | Gable End Cladding | External Wall Cladding |Fascia Board | Decking | Flooring | Ceiling | Eaves Lining

plank™

1.4 Tests and Certification meets the national & international fibre cement standards, namely MS 1296, ISO 8336, AS/NZS 2908.2, BSEN 12467 and ASTMC 1186.

1.4.1 Serviceable LifeWhen installed and maintained as per good building practice and specifications described in this manual, is expected to have serviceable life of 50 years.

1.4.2 Standard Sizes and Mass comes in standard thickness of 7.5mm, 9mm, 12mm, 16mm and 25mm. It is available in three patterns:

1 Introduction

1.1 General is an autoclaved cellulose fibre reinforced cement siding board manufactured by Hume Cemboard Industries Sdn Bhd, an ISO 9001 and ISO 14001 certified company. Manufactured from Portland cement, cellulose fibre, finely ground sand and water, has become extremely popular when a relatively maintenance free timber planking appearance is desired.

1.2 Applications is designed for external applications where superb weatherability and long-lasting durability form part and parcel of performance criteria. These applications includes:-

• External wall cladding• Gable end cladding• Aesthetic cladding• Fascia board• Gate and fencing• Ceiling• Skirting• Floor and Decking

is used where there is a requirement for traditional timber look and to add character and depth to flat mundane surfaces.

1.3 Features & Benefits• Natural timber look• Weather resistant• Will not rust or rot• Termite resistant• Does not warp or twist• Fire resistant- Class 'O'• Aesthetically Pleasing• Environmentally Friendly













2.1 Material Selection thickness should be selected based on the intended applications. For general cladding, fascia board and fencing applications, 7.5mm thick plank is adequate. When higher performance (stronger and more impact resistant) material is desired, use 9.0mm or thicker .

For best result, the use of 9.0mm thick is highly recommended for fascia board application where rafters are to be exposed (in absence of eaves lining board).

Refer to product brochure for information on applications based on product thickness, standard length and width dimensions and texture profile.

Trimming plank to a size less than the standard width will reduce its capacity to withstand loads. In instances where reduced-width planks are desirable such as for fencing application, always refer to Hume Cemboard before specifying or applying them.

Do not apply in areas where it remains in contact with standing water.

2.2 Framing Specification can be applied to timber or light gauge steel framing members. Construction shall be in accordance with local building practice.

Framing components must have adequate durability for the intended use. These durability criteria shall among others include resistance to weather; corrosion and pest (i.e. termite attack).

Framing timber should be thoroughly dry and selected to minimize shrinkage when planks are installed.

Steel framing must be fabricated from cold-formed galvanized light gauge steel or zincalume steel of a minimum 0.55mm to 1.60mm base metal thickness.

As the straightness of finished wall is highly dependent on workmanship of framework, best result can be achieve when frame straightness is between 3mm to 4mm in any 3000mm length.

2.3 Batten SpecificationThick hot rolled structural steel sections and masonry wall must be battened prior to installation of cladding.

Use timber batten with a minimum of 25mm thick x 50mm wide to allow adequate nail penetration.

Steel battens must have a minimum 35mm face width. They are typically 'Z' or top hat sections. Use only galvanised light gauge steel / zincalume of a minimum 0.55mm to 1.60mm base metal thickness.

2.4 FastenersSelect the appropriate type of fasteners based on the type of framing. Fasteners should have acceptable level of durability and be suitably coated for the intended application.

At least class 3 external grade finish fasteners must be used for external applications.

Fasteners must be compatible with all materials that they are in contact with to ensure the durability & integrity of the system.

can be fixed by hand nailing or air gun nailing. For screw fixing, use screw gun with high torque and variable speed of zero to 2,500 revolution per minute fitted with a depth control attachment.

Nail head should finish flush with the face and avoid overdriving.

2 General Fixing Instructions

Drive screw slightly below the plank face and cover fastener head with exterior grade jointing compound . Smoothen with sandpaper if necessary before painting.

2.5 Sealing Joints and GapsGaps at plank joints, corners and openings must be sealed with flexible/ paintable polyurethane sealant. Sealant must be compatible with cementitious panel products. Apply masking tape at both plank edges and start filling the bottom edge and squeezing the sealant in the upward direction. Use spatula to smoothen and remove any excess sealant Remove masking tape immediately upon completion. Sealant manufacturer's instruction must be adhered to. Sealant must only be painted as recommended by the manufacturer.

2.6 Jointing Against other Material When butt jointing and other building materials such as masonry wall, a minimum of 6mm gap must be provided. Seal gap with paintable/ flexible sealant, as shown in Figure 1.








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- Smoothis available with a flat unsanded surface

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- Timbergrain is straight grain timber texture,available on one surface or two surfaces

plank™

- Woodgrain has an enhanced timber textureon the front surface

plank™

03

3 External Wall & Gable End Cladding













2.1 Material Selection thickness should be selected based on the intended applications. For general cladding, fascia board and fencing applications, 7.5mm thick plank is adequate. When higher performance (stronger and more impact resistant) material is desired, use 9.0mm or thicker .

For best result, the use of 9.0mm thick is highly recommended for fascia board application where rafters are to be exposed (in absence of eaves lining board).

Refer to product brochure for information on applications based on product thickness, standard length and width dimensions and texture profile.

Trimming plank to a size less than the standard width will reduce its capacity to withstand loads. In instances where reduced-width planks are desirable such as for fencing application, always refer to Hume Cemboard before specifying or applying them.

Do not apply in areas where it remains in contact with standing water.

2.2 Framing Specification can be applied to timber or light gauge steel framing members. Construction shall be in accordance with local building practice.

Framing components must have adequate durability for the intended use. These durability criteria shall among others include resistance to weather; corrosion and pest (i.e. termite attack).

Framing timber should be thoroughly dry and selected to minimize shrinkage when planks are installed.

Steel framing must be fabricated from cold-formed galvanized light gauge steel or zincalume steel of a minimum 0.55mm to 1.60mm base metal thickness.

As the straightness of finished wall is highly dependent on workmanship of framework, best result can be achieve when frame straightness is between 3mm to 4mm in any 3000mm length.

2.3 Batten SpecificationThick hot rolled structural steel sections and masonry wall must be battened prior to installation of cladding.

Use timber batten with a minimum of 25mm thick x 50mm wide to allow adequate nail penetration.

Steel battens must have a minimum 35mm face width. They are typically 'Z' or top hat sections. Use only galvanised light gauge steel / zincalume of a minimum 0.55mm to 1.60mm base metal thickness.

2.4 FastenersSelect the appropriate type of fasteners based on the type of framing. Fasteners should have acceptable level of durability and be suitably coated for the intended application.

At least class 3 external grade finish fasteners must be used for external applications.

Fasteners must be compatible with all materials that they are in contact with to ensure the durability & integrity of the system.

can be fixed by hand nailing or air gun nailing. For screw fixing, use screw gun with high torque and variable speed of zero to 2,500 revolution per minute fitted with a depth control attachment.

Nail head should finish flush with the face and avoid overdriving.

Drive screw slightly below the plank face and cover fastener head with exterior grade jointing compound . Smoothen with sandpaper if necessary before painting.

2.5 Sealing Joints and GapsGaps at plank joints, corners and openings must be sealed with flexible/ paintable polyurethane sealant. Sealant must be compatible with cementitious panel products. Apply masking tape at both plank edges and start filling the bottom edge and squeezing the sealant in the upward direction. Use spatula to smoothen and remove any excess sealant Remove masking tape immediately upon completion. Sealant manufacturer's instruction must be adhered to. Sealant must only be painted as recommended by the manufacturer.

2.6 Jointing Against other Material When butt jointing and other building materials such as masonry wall, a minimum of 6mm gap must be provided. Seal gap with paintable/ flexible sealant, as shown in Figure 1.








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jointing compound

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2.8mm Ø x 30mm Galvanised Nails2.8mm Ø x 40mm Galvanised Nails(for plank thickness 16 & 25mm)

Fasteners to Timber

Table: Fastener Specification

Fasteners to Steel

Note:Drive nail head snug or flush with plank face.Pre-drilling is required when nailing between 20mm to 50mm fromthe plank end.Drive screw heads not more than 1mm below plank face.Overdriven fastener point should be cover with exterior gradejointing compound before painting.Hold plank firmly against the frame while driving the fasteners.

1. 2.

3.4.

5.

flashing

ground clearance

end joints to be staggered(refer joint detail options)

vapour permeable sarking/building paper (optional)

mineral wool/ fibreglass insulation (optional)

nogging

top plate

stud

starter strip

600mm

600mm maximum

centres stud spacing

600mm600mm

cladding

Figure 2: Horizontal planking

Figure 1: Jointing with other material

cladding


apply sealant

6mm

masonry wall

plank™

plank™

Self-embedding head, self-drilling “Wing Teks” Screws for fastening to 0.55mm to 1.60mm BMT steel frames

No.8 X 1 (28mm) for plankthickness ≤ 12mm

No.8 X 1 (32mm) for plankthickness - 12mm & 16mm

No.8 X 1 (44mm) for plankthickness - 25mm

81

41

43

04




















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Ensure framing is true and align prior to fixing .Apply building paper sarking over the framework.Fix flashing at all internal and external corner and heads ofopenings such as door and window.Install timber moulds at internal and external corners.Secure a 40mm wide starter strip or treated timber strip along the bottom plate.Use a spirit or water level to locate the top edge of the first course of the plankDrive a series of guide nails around the perimeter of the timber framework to indicate the top edge of the first course of the plank.Fix the first plank starting from the external corner. Set the top edge of the plank flush against the guide nails and the end abutting the (moderate contact) timber corner stop. Drive fastener to the bottom plate through the plank thickness and the starter strip at 200mm centres maximum.Fix the balance of the planks of the first course around thebuilding. Planks may be joined with proprietor PVC jointer.Provide a minimum of 25mm overlap between each successive plank course. Measure the total wall height to be clad and calculate the suitable overlap so that a near full-width plank finishes at the top of the clad wall. Remove the guide nails and continue the next course of the plank with an off-cut plank. This is done to ensure that the plank joints would be staggered between courses.Check level occasionally.

1.2.3.

4.5.

6.

7.

8.

9.

10.

11.

3.6 Installation ProcedureThese steps provide a general guide for installation of .plank™

plank™

plank™

flat head nail fixed at centre of overlap


25mm min. overlap

Figure 5: Fastening to steel frame


screw fixed through thetop plank only

25mm min. overlap

7.5mm

new/ subsequentplank coursesarking/ building

previous course

stud

7.5mm

x= net cover width (plank width - overlap)eg 230mm - 25mm = 205mm

Figure 4: Fastening to timber frame

cladding

cladding

25mm min. overlap

internal lining board (


12mm min.

Figure 3: Lap gauge

/

/

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plank™

plank™

liner™ flex™

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)

05




















plank™

stud

PVC jointer


3mm gap (apply sealant)

internal lining

timber poststud


External corner

Internal corner

Figure 10: Timber post corners


flashing (not required when reflective sarking is used)

25 x 25mm timber stop

25 x 50mm timber stop

internal lining

corner studs

External Corner

Internal CornerFigure 9: Timber stop corners

Figure 8: Ground Clearance


exterior grade timber or fibre cement trim

damp-proof courseor flashing

150mm min. clearance

concrete slab


Figure 7: On-stud joint

cladding

trim-packing for narrow stud as required (at plank joint only)


nailing to support (pre-drillingwhen nailing between 20mmto 50mm from plank end)

moderate contact or allow 3mm gap and seal gap with paintable/ flexible sealant

3mm gap

cladding

Figure 6: Off-stud joint

cladding

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/

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liner™ flex™plank™

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06

4.1 General can be clad onto masonry wall to enhance the aesthetic appearance of residential or commercial buildings.

4.2 Battening RequirementMasonry wall must be battened prior to applying . Battens must be spaced vertically at 600mm maximum centres. Ensure batten's straightness is within the acceptable tolerance. Battens must be adequately fastened onto the masonry wall.

4.3 Installation Method may be installed horizontally. In any case, support must be provided at 600mm centres. lnstallation method is similar to that of external cladding application.

Battens can be applied directly onto relatively flat/ even masonry wall. Refer Figure 15.

Provide spacers or brackets when battening uneven masonry wall as shown in Figure 16. Alternatively, sub-framing may be installed horizontally to uneven surface at approximately 1500mm maximum interval before securing the battens. All framing components must be adequately secured onto masonry wall. Consult a qualified engineer to verify structural adequacy if required.

4 Cladding To Masonry Wall




















4.4 SarkingIt is recommended to install a vapour permeable sarking material on the masonry wall prior to fixing battens.

4.5 JointingPlanks can be jointed with PVC jointer or Butt Joined. These jointing methods are similar to the external cladding joints shown in Figure 6 & 7.

4.6 CornersInternal and external corners can be decorated with exterior grade timber trim. Trim can also be fabricated using cladding, cut to the desired width. Refer Figure 17.

4.7 OpeningDoor or window opening may be finished with trims. Provide Smm gap between and trims around the opening as described in Figure11.

When desired, opening may be decorated with in-situ concrete or pre-formed coping as illustrated in Figure 18, 19 and 20.

4.8 Wall-to-Eaves JunctionProvide adequate ventilation between masonry wall and cladding. The ventilation can either be provided through the roof or below the eaves. Ventilated path though the roof is depicted in Figure 21 below.

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Figure 14: Door/ window jamb detail

architrave

window frame

cladding


nominal 5mmclearance (apply sealant)

backing piece as required

Figure 13: Sill Flashing Detail

architrave

/internal lining board (


sill flashing

window frame


Figure 12: Head Flashing Detail

lintel

architrave

window frame


nominal 5mm clearance(do not apply sealant)

head flashing

Figure 11: Window/ door opening detail

optional vapour permeablesarking to lap over flashing

head flashing

window frame

minimum 25mmthick window trim

5mm clearance around opening(apply sealant)

5mm gapbetween plankand flashing

full plank width is recommended


cladding

cladding

cladding

/ )internal lining board (

/ )internal lining board (

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Figure 19: Window sill detail

masonry wall

nominal 5mm clearance(apply sealant)

in-situ concrete orpre-formed copingto architect’s approval

window frame


Figure 17: Corner details

masonry wall

exterior timber or fibre cement trim


cladding

External Corner

internal Corner

Figure 18: Window head detail

masonry wall

window frame




timber/ steel batten installedvertically at 600mm max. centres

masonry wall

Figure 15: Battening onto flat masonry wall



cladding installed horizontal

Figure 16: Battening onto uneven masonry wall



framing spacer or bracket at 1200mm centres

cladding installed horizontal

masonry wall

cladding

cladding

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08






5 Fascia Board Introductions

5.1 General superior durability makes it a perfect choice for fascia board around the roof perimeter. With the choice of various surface texture, fascia board is not only aesthetically pleasing but also cost effective.

5.2 Support fascia board is normally fixed to timber or metal rafters/ trusses with spacing not exceeding 600mm centres. When support spacing exceeds 600mm, provide a continuous battening behind the fascia board. Alternatively, a 'dummy' rafter/ truss should be provided as intermediate support. The use of 9mm thick plank is highly recommended when support spacing is more than 600mm centres.

5.3 InstallationApply a minimum of 2 fasteners at each rafter or truss end. Drive fastener 12mm from plank edge and 50mm from corner.

Fix a metal angle capping at ends of metal rafters/ trusses to facilitate fascia board installation as described in Figure 23.

Fixings of attachment (such as bracket for gutter) to fascia board must be connected to the roof structural element.

5.4 JointsPlanks can be jointed with PVC jointer or Butt Joined. Provide 3mm gap if joint is to be sealed. These jointing options are shown in Figure 22 & 23. When Off-support Joint without PVC jointer is preferred, provide additional metal/ timber backing piece behind the fascia board. Ensure planks are secured to the backing piece. Hold backing piece firmly while driving the fasteners.


























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Figure 20: Window jamb detail

masonry wall



window frame




Figure 21: Wall ventilation detail

masonry wall

ventilation throughsoffit/ roof

cladding

fascia board

eaves lining board masonry wall

Figure 22: PVC joint (Timber frame)

PVC mould (to be located notmore than 150mm away from rafter/truss in absence of eaves lining batten)

*PVC mould is available for7.5mm thick plank only

fastener at

300mm max.

timber beading as required eaves lining batten/ support

rafter/ truss at 600mm centres

fastener

roof batten

fascia board

eaves lining board

cladding

/

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09

6 Decorative Fencing

6.1 General can be incorporated in the construction of conventional masonry, timber or steel framed fencing for medium to high-end terrace houses as well as semi-D or bungalows.

6.2 Framing RequirementFraming durability must satisfy the minimum requirement of the intended use. It is recommended to use exterior grade (treated timber) or steel hollow section to form the support. Steel hollow section must be suitably coated to resist external weather.

6.3 Installation can be installed vertically or horizontally. In any case, support must be provided at 400mm centres maximum. Install fasteners approximately 30mm from edge and 50mm from corner of plank. Fix at least 2 fasteners at each support.

ends must not overhang (cantilever) more than 100mm from the support.

The following fasteners are suitable if it is desired to have screw heads exposed:-

Refer to screw manufacturer's instruction on the minimum screw penetration to framing member:




















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• Timber Support: Use No.10 x 30mm Hexagon head, Type 17 point screws

• Steel support: Use No.10 x 25mm Hexagon head, self-drilling point screws

Horizontal Section

Front Elevation

Figure 24: Vertical fencing

fencing applied vertically

masonry wall

30mm min.from edge

30mm min.

gap to architectapproval

gap to architect approval

100mm max overhang

100mm max overhang

timber/ steel frame

610m

m m

ax.

Figure 23: Butt joint & sealant (Metal rafter/ truss)

timber beading as required

butt joint (moderate contact)

metal rafter/ truss at600mm max. centres

backing piece

fastener

3mm gap sealed withflexible/ paintable sealant

12mm min.

50mm min

fascia board

eaves lining boardflex™

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10

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7 Ceiling and Eaves Lining

7.1 General 9mm with 2 sided V-edge profile in ‘Smooth’, ‘Woodgrain’ or ‘Timbergrain’ surface texture is always the preferred choice as alternative to the wood plank as the ceiling lining which provides the warmth and beauty of natural timber looking ceilings. It is not only durable but environmental friendly comparing by using traditional forest timbers.

7.2 Framing RequirementLight gauge galvanized steel C-section with standard size 50mm x 35mm x 0.50mm BMT is used as the metal framing for ceiling hanger and ceiling joist. must be supported at 407mm maximum centres, refer Figure 26. Ensure the ceiling joists are reasonably flat and level prior the plank installation.

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Light gauge galvanised steel c-channel at407mm max c/c(0.50mm min base metal thickness)

Ceiling hanger at 900mm max c/c (Light gauge galvanised steel c-channel0.50mm base metal thickness)

Light gaugegalvanised steelU-channel (0.50mmmin base metalthickness)

plank™V-edge

75mm / 100mm (W) x3660mm (L) x 9.0mm (T)

100mm

100mm

407mm max. c/c

900mm max. c/c

Figure 25: Horizontal fencing

Front Elevation

610mmmax.

timber/ steel frame

masonry workgap to architect approval

Horizontal Section

timber/ steel frame at 400mm max.centre

gap to architect approval

30mm min. from edge

fencing applied horizontallyplank™

Figure 26: Typical Ceiling Layoutplank™

11

7.3 InstallationInstall 9mm across the ceiling joist in a staggered pattern. Fasten the plank onto ceiling joist by using the self-drilling self-embedding head wing tek screw ( ) with 407mm fasteners spacing as shown in Figure 27. The screws are fastened at the centre of the plank. For plank width joint area, the screws are fastened 12mm minimum from the plank edge, refer Figure 27 Detail A. If the plank width edges fall at the off-stud jointing, a light gauge steel nogging is placed on top of the edge joints. Fasten the plank to the nogging accordingly.

Figure 27: ceiling installation

Figure 28: Joint Detail

All fastener heads must be covered with with 10% cement mixing ratio. Clean dust out of holes to ensure adhesion of joint compound.

The is generally installed with butt jointing plank ends with moderate contact as shown in Figure 28.

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fastener - Wing Tek 28mm C1

jointing compound

plank™

plank™

plank™V-edge

75mm / 100mm (W) x3660mm (L) x 9.0mm (T) Ceiling joist @ 407mm c/c

407mm max. c/c

Staggered joint

12mm

plank™V-edge

75mm / 100mm (W) x3660mm (L) x 9.0mm (T)

Butt joint with moderate contact

12

steel hollow section with maximum BMT 1.6mm. It is the responsibility of structural engineer to ensure the framing system in which decking will be laid on will perform under the design load.

The decking or flooring joist or frame spacing shall be determined by loading requirements and comply with local building regulations. In all cases, the joist spacing must not exceed 610mm centres. Refer table below for the load selection table for recommended joist spacing based on plank thickness.

8 Decking / Flooring

8.1 General Decking, offering choices of Smooth and Timbergrain textures and with light chamfer at length edges, is ideal for decking and flooring applications. It is the best substitution to natural timber decking for commercial and residential buildings and can be used for interior and exterior applications. Decking can be applied on the steel frame and direct to the floor slab. For thickness 12mm, it is recommended to be laid directly to the floor slab.

8.2 Framing RequirementThe steel framing system is generally fabricated using light gauge galvanized steel C-section with BMT 0.75mm to 1.6mm BMT or mild

Table: Plank Thickness vs Load Selection

16mm

25mm

Thickness

Joist Spacing @ 305mm c/c

UDL

19.2 kN/m2

1957 kg/m2

43.3 kN/m2

4414 kg/m2

CL

4.2 kN

428 kg

9.5 kN

968 kg


UDL

9.0 kN/m2

917 kg/m2

20.5 kN/m2

2090 kg/m2

CL

2.3 kN

234 kg

5.3 kN

540 kg


CL

1.0 kN

102 kg

2.3 kN

234 kg

UDL

2.5 kN/m2

255kg/m2

5.9 kN/m2

601 kg/m2

Note:UDL = Uniformity Distributed Load; CL = Concentrated LoadBending strength for 16mm & 25mm is 16 N/mm2Modulus of Elasticity for 16mm is 6000 N/mm2 and 25mm is4000 N/mm2Minimum factor of safety is 3 has been factored inAllowable maximum deflection is limited to L/250 of joist spacingConcentrated load is applied over 300mm x 300mm area

•••

•••

How to use table above:Step 1: Determine the actual application of the deck system (i.e. House, Institutional

Buildings, Offices etc) Step 2: Refer to Malaysia Uniform Building By-Law (UBBL) for the minimum UDL and CL

for the intended application.Step 3: Determine the type of finishing material to be applied on the decking, the

weight of this material must be added to the UDL value obtained in Step 2.Step 4: Select the suitable joist spacing that meets the minimum UDL (plus weight of

finishing materials) & CL stated in Step 2.

Metal framing system is not required for decking direct installation to concrete slab.

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8.3 Installation

8.3.1 On Metal FramingEnsure the framing system is designed and constructed in accordance with applicable building standards and acceptable building practices. Floor joists must be true and level. Lay decking in staggered position across the floor joist, refer Figure 29.

Use self-embedding head self-drilling wing tek screw to fasten the board to the frame according to Figure 30. Other fasteners can be used but might require pre-drilling. The fastener points to be covered with with 10% cement mixing ratio or can be left un-covered which corrosion resistance at least Class 3 fasteners are required.

Figure 29: Typical Layout for decking onto Steel Frame Figure 30: Fastener Fixing

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jointing compound

305mm to 610mmbased on designed load

Mild steel hollow sectionor light gauge galvanisedsteel c-section

150mm x 3660mm x 25mm thick

installed in staggered positionplank™V-edge

Self embedding headSelf drilling screws

Staggered joint

25mm

25mm

12mm

13

Sheets are normally butt joint at along edges and butt joint or expressed joint with 3 to 4mm gap at the cross edges, refer Figure 31 & 32 below. For wet area application, please ensure all the surfaces (6 sides) of plank are coated with water proofing sealer and coatings.

Figure 31: Joint Detail at along edges

Figure 32: Butt Joint and Express Joint at cross edges (width joint)

8.3.2 Direct to Concrete Slab decking must be pre-sealed with water repellent sealer for all 6 surfaces prior installation. Tile or chemical adhesive is used for bonding the sheet to the concrete slab. A rough finished concrete slab surface is preferable to have good bonding with either tile or chemical adhesive. Dust, loose particles and grease must be removed from the concrete surface prior applying the adhesive. Prepare the adhesive as per manufacturer’s recommendation. Refer table below for the recommended tile adhesive and chemical adhesive for decking.

Table: Recommended Tile and Chemical Adhesives for decking

Description

Single Part Semi-Flexible Tile Adhesive

Adhesive Single Part Semi-Flexible Tile Adhesive

Solvent-free Elastic Chemical Adhesive

Brand

Weber

Mapei

SIKA

Commercial Product Name

Belcem Superflex 21

Keraflex Maxi Flexible S1 Adhesive

SikaBond-52 Parquet

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75mm / 100mm (W) x3660mm (L) x 9.0mm (T) Self embedding head

Self drilling screws

25mm

Mild steel hollow sectionor light gauge galvanised

steel c-section, spacingc/c to engineer details

Butt joint with moderate

12mm 12mm

Self embedding head screw,Self drilling screw


steel c-section, spacingc/c to engineers detail

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75mm / 100mm (W) x3660mm (L) x 9.0mm (T)

3 to 4mm wide gap

12mm 12mm

Self embedding headSelf drilling screws


steel c-section, spacingc/c to engineers detail

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75mm / 100mm (W) x3660mm (L) x 9.0mm (T)

14

For application using tile adhesive, spread the tile adhesive to the bottom surface at bed thickness of around 10 mm. A triangular or rectangular notch trowel can be used to do the job. Promptly fix onto concrete slab and followed by slight twisting action to ensure good contact before the skin-over of tile adhesive occur. Re-trowel the adhesive bed if the adhesive bed is no longer tacky or sticky. Remove surplus adhesive before it hardens and allow the adhesive to set and cure for 24 hours. It is recommended to install the in staggered layout. It is key to allocate 3-4mm gap at along (length) and cross (width) joints for tile adhesive application.

For application using chemical adhesive, insert the sausage chemical adhesive into the adhesive gun, extrude a triangular shaped bead of adhesive approximately 10 mm high and 8 mm wide at maximum 305 mm c/c onto the concrete slab. Refer to Figure 33 for chemical adhesive distance and plank orientation. Always refer to manufacturer’s recommendation for the skinning time or the laying time of the chemical adhesive. The is pressed firmly onto the chemical adhesive. A rubber hammer can be used to knock on plank edges to ensure it is laid tightly to the slab. Allocate 3-4mm gap at width joint area and butt joint for along length area, refer Figure 34.

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Figure 33: Chemical Adhesive Span Distance and Plank Orientation

Figure 34: Joint Details (Along and Cross/Width Joints)

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Butt Joint

Chemical adhesive at305mm max. c/c

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Chemical adhesive at305mm max. c/c

3-4mm wide gapplank™

Decking

Chemical adhesiveat 305mm max. c/c

305mm max. c/c

Decking installed instaggered position

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15

9 Finishes Recommendations

Under normal circumstances must be coated within 3 months after installation. For best result, decorate with 2 coats of 100% quality acrylic paint. For general-purpose applications, there is no requirement for primers or sealers. Ensure planks are dry prior to painting. For decorative fencing application, plank must be coated on both surfaces and all edges. All plank exposed surfaces and edges must be painted.

For translucent varnish colour appearance, Nippon Fibercote is recommended as it will provide or highlight the natural grain of the product.

10 Working Instructions

10.1 CuttingCutting must be carried out in a well-ventilated area using one of the following methods:-

• Hand Saw The use of fine-toothed hand saw coupled with quick jabbing action will normally'produces best result.

• Power Cutting ToolWhen large amount of plank cutting is involved, use power cutting

• Score and Snap - Score the plank face with 'score and snap'. Repeat until depth reaches 1/3 of plank thickness. Snap plank upward to achieve clean break. Trim cut edge with rasp if necessary.

Figure 26: Score and Snap Method (left), Machine Cut (right)

It is difficult to cover the fastener with jointing compound with translucent varnish paint and thus a layer of white primer or sealer is recommended to paint as first layer prior the translucent varnish paint.

For certain applications, it will be looked good by exposing the fastener head without any jointing compound.

In all cases, coating manufacturer's recommendations must be strictly adhered to.

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tool equipped with carbide-tipped or diamondtipped circular saw.

10.2 DrillingSmall holes can be formed using high-speed (HSS) drill bits. Larger circular holes can be created by drilling a series of small holes around the perimeter of the proposed hole, and gently tapping out the waste piece. Smoothen the rough drilled edge with rasp if necessary.

10.3 Handling & Storage must be stacked on flat ground and supported wfth level bearers prior to installation. Ensure all timber bearers of a stacked plank are aligned with other stacks. Improper plank stacking may result in permanent plank deformation that causes unsightly appearance such as waviness.

must always be kept dry, preferably stored under a protected shade. When stored outdoors, it must be protected from water ingress and weather by covering with tarpaulin sheet. Allow wet plank to dry to equilibrium under a natural ventilated condition prior to installation.

To minimize breakages. must be carried with up-right.

16

No. 12 Jalan Tandang, 46050 Petaling Jaya, Selangor, Malaysia.

Malaysia Sales Tel: + 603 7625 9999 Fax: +603 7625 7822 Email: [email protected] Sales Tel: + 603 7625 3880 Fax: +603 7625 3990 Email: [email protected]

www.primaf ibrecement.com

For more information, please contact us at:

50 Years Durability

50Years

WARRANTYHume Cemboard Industries Sdn Bhd (“the Company”) warrants that it will at all times ensure that the products referred to herein (“the Products”) shall be supplied by it to the purchaser free of any manufacturing defects and defective materials used in their manufacture.

In the event and if contrary to this assertion the Products prove to be defective, whether as a result of manufacturing defects or arising from the Company’s use of defective materials, the Company will supply replacement Products. The Company shall, however, have the option and may choose to reimburse the purchaser the purchase price of the Products instead. The Company shall not be liable for any economic or consequential losses arising from any use of defective Products.

This warranty shall be void unless the purchaser has, in its handling and installation of the Products, complied with the recommendations contained in this brochure and other good building practices expected of a reasonable purchaser.

ADVISORY NOTESuccessful installations of Hume Cemboard Industries Sdn Bhd’s Products depend on a large number of factors that are outside of the scope of this brochure. Particular design, detail, construction requirements and workmanship are beyond the control of the Company. As such, Hume Cemboard Industries Sdn Bhd’s warranty does not extend to non-usability of Products or damage to Products arising from poor or defective designs or systems or poor quality of workmanship in the installation of Products.

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