12.0 PowerBlock Handling

Manual Handling

To minimise the possibility of manual handling injuries, Hebel suggests the following:

  • Use mechanical aids, such as trolleys, forklifts, cranes and levers, or team lifting to move Hebel.
  • Keep the work place clean to reduce the risk of slips, trips and falls, which can cause injury.
  • Plan the sequence of installation to minimise panel movements and avoid awkward lifts.
  • Good lifting techniques to be adopted to minimise the risk of injury.

Mechanically Assisted Handling

Moving and handling Hebel Floor Panels and Hebel Lintels should be done using mechanical aids such us forklifts, cranes and special panel lifting trolleys. Different panel lift attachments are available for installing panels. For purchasing or hire of these devices please contact CSR Panel Systems.

Health, Safety & Personal Protective Equipment (PPE)

Hebel AAC products are cement-based, which may irritate the skin, resulting in itching and occasionally a red rash. The wearing of gloves and suitable clothing to reduce abrasion and irritation of the skin is recommended when handling Hebel AAC products.

Approved respirators (AS/NZS1715 and AS/NZ1716) and eye protection (AS1336) should be worn at all times when cutting and chasing. Refer to the Hebel Material Safety Data Sheets (MSDS).

Fig. 12.1 Standard personal protection equipment.

Cutting

The use of power tools when cutting masonry products may cause dust, which contains respirable crystalline silica, with the potential to cause bronchitis, silicious and lung cancer after repeated and prolonged exposure. When using power or hand tools, on Hebel products, wear a P1 or P2 respirator and eye protection. When cutting, routing or chasing Hebel products with power tools, use dust extraction equipment and wear appropriate hearing protection.

Reinforcement exposed during cutting is to be coated with a liberal application of Hebel corrosion protection paint.

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1 Design QT Eco Series

1.1 Material Properties

Width Length Thickness Weight
900mm x 2250mm x 50mm (nom) 40kg (nom)
  • Total Square Metres per Panel = 2.0 m2.
  • Number of 50mm Panels per Pallet = 23 panels Pallet Weight:- 940kg (approx) (± 20 kg safety factor).
  • Pallet Size – 900mm Width x 2250mm Length x Max. 1350mm Height (nom).

1.2 Thermal Performance

The Thermal performance of the QT EcoSeries Wall System is calculated in accordance with AS 2627.1 Thermal Insulation of Dwellings. QT EcoSeries Wall Panel has a k-value of 0.07 w/mk.

Wall System Composition

* Note: R-Values in table have been rounded up or down to the nearest R0.5 as permitted under AS 2627.1.

1.3 Impact Resistance

QT EcoSeries Wall Panel when coated with a cement base render, can provide resistance for hard body impacts typically found under normal situations. (Refer coating manufacturers for details).

1.4 Acoustic Performance

The QT EcoSeries Wall System was tested in accordance with AS/NZS 1276.1 for Airborne Sound Transmission and achieved STC41 and Rw41(-3;-8)(Wall Composition: 50mm QT EcoSeries Wall Panel with 30mm (nom) cavity on a 70mm x 35mm stud frame and 10mm plasterboard) CSIRO TL399. Acoustic performance can be significantly increased with the addition of bulk or acoustic insulation batts.

1.5 Fire Performance

QT EcoSeries Wall Panels when tested to AS/NZS 3837 and in accordance with BCA Specification C1.10a Section is classed as a GROUP 1 material.

Early Fire Hazard Indices (Test to AS/NZS 1530 Part 3)
Ignitability Index 0
Spread of Flame Index 0
Heat Evolved Index 0
Smoke Developed Index 0-1

 

1.6 Durability

In normal conditions and when maintained properly in a weather proof condition, the cladding systems should exceed 30 years of trouble free serviceable life. When the system is installed in high corrosion zones, such as coastal locations within distances of up to 500m from the sea, particular care must be taken to ensure that openings through the cladding panels are kept to a minimum to prevent corrosive salt aerosols from entering the wall cavity and affecting metal components. (Permitted openings are base weepholes, soffit vents and openings beneath window joinery at sills).

Wildlife Attack

The panels will not support growth of micro-organisms such as fungi or bacteria and do not hold any nutritional value for ants or rodents.

1.7 Cavity

Cavities form an important role in the weathertightness and life cycle of any wall system QT EcoSeries Wall Panels constructed without a cavity will void any warranty. The cavity acts as a secondary barrier against wind driven rain penetration entering the wall framing. The cavity also allows the wall to ventilate and drain which is essential for a healthy wall.

1.8 Vapour Permeable Sarking

Vapour permeable sarking must be installed to the face of the building framing prior to installation of the battens and panels. The vapour permeable sarking has two main functions, weathertightness and thermal resistance. In its weathertightness role it protects the building framing from direct contact with moisture generated by wind driven rain penetration, while allowing the condensation of moisture from interior artificial heating and cooling to escape. Thermally the vapour permeable sarking divides the wall into two separate air spaces, which significantly increases the thermal performance of the wall.

1.9 Weepholes

On the first horizontal course (ground level) weep holes are to be installed at centres not exceeding 1200mm immediately above any damp proof membrane or flashing. Weepholes are also required in areas where there is a possibility of moisture build up. Weepholes must be limited to 8mm in width to reduce the potential for vermin access.

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3 Corners, Joints & Junctions QT Eco Series

3.1  External Corners

Internal corners can be formed by continuing the QT FullMesh around the corner or by embedding a QT CornerMesh into the base coat render. External corners can be formed by embedding a QT CornerMesh into the base coat render or by fixing a corner bead prior to rendering. In all cases the abutting corner panels must be bonded with polyurethane foam adhesive.

External Corners

3.2  Relief Joints

Relief joints are required to accommodate any structural movement or panel movement due to temperature or moisture changes. If the panel above or below an opening is less than 300mm in depth or more than 2400mm in length the panel must be articulated by creating a vertical expansion joint to reduce and/or relieve the stress in the panel and coating system. All other corner openings must be reinforced with QT 45˚Mesh. The QT 45˚Mesh helps prevent any 45˚hairline cracks forming from the corner of any opening.

Relief Joint Setout

3.3 Control joints

Control joints are designed to relieve structural movement between the wall cladding and building frame and also relieve any stress that builds up in the applied coating system. Vertical control joints are required at no greater than 5 metre centres (+ or – 500mm) in walls greater than 8 metres in length. Double studs are required at all vertical control joints. Vertical joints are best aligned with windows, doors, openings, or internal corners. Where timber floor joists are used a 15mm (nom), horizontal control joint must be provided at floor levels to allow for shrinkage and movement of the joists. 10mm control joints must also occur where the QT EcoSeries Wall Panels meet alternative wall claddings eg. Weatherboard, brickwork, etc. On gable ends, a horizontal control joint will be required at the top plate of the wall so as to separate the gable  wall from the wall below. Control joints can be formed with the use of a backing rod and sealant or by the installation of uPVC expansion bead.

Vertical Expansion Joint

3.4 Junctions

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4 Construction Details QT Eco Series

4.1 Slab & Floor

All foundations must comply with the relevant standards and local authority requirements, with appropriate consideration given to soil type. QT EcoSeries Wall Panel is suitable for construction on concrete slab or suspended floors. The concrete slab can either be rebated or non-rebated. The slab rebate will need to be a minimum of 50mm below floor level and 100mm above paved level or 150mm above ground level (See local standards). To ensure a flush finish, the width of the slab rebate needs to allow for the thickness of the coating system, the thickness of the panel (40mm or 50mm), and the size of the extended wall cavity 20 – 50mm (30mm nom). Minimum ground clearances, must be maintained at all times during the life of the building. Insufficient clearance from the ground to the bottom of the wall panels will affect long-term durability.

4.3 Windows

Wherever possible windows and associated flashings should be installed prior to the installation of the QT EcoSeries Wall Panel. When ordering the window frame it is essential to plan where the window flange will be positioned either flush with the stud frame, flush with battens or even over the panel.

All materials that are susceptible to deterioration due to plastics migration or alkalinity of cement base products must be protected (check with product manufacturer).

4.4 Decorative Mouldings

To provide added design flexibility, decorative mouldings or features can be made using QT EcoSeries Wall Panels. The panel can be cut into bands or laminate multiple layers and shape to achieve the desired profile. Once installed, a coating system would then be applied. Alternatively, a wide range of decorative mouldings are available from various manufacturers.

QT EcoSeries Wall Panels can be cut into bands that can be installed around windows, doors, along horizontal control joints, etc to enrich the aesthetics of the project. They are installed so the top and bottom edge (bevelled at 15 degrees) falls away from the wall. Where bands meet, they should be cut at a 45˚ angle, across the face of the corbel to help conceal the join and increase the adhered surface bond. Bands are bonded into place with polyurethane foam and corbel screws or nails to mechanically fix the bands until the foam is set.

 

4.5 Doors

Door framing must be fixed in position prior to the installation of the QT EcoSeries Wall Panels. The door framing will allow the panel to be cut and installed neat but independent of the frame. Door frames must be fixed to the structural framing. Decorative mouldings can be used to emphasize the door opening.

All materials that are susceptible to deterioration due to plastics migration or alkalinity of cement base products must be protected (check with product manufacturer).


4.7 Wall to Roof

Wall to roof details can often be unsightly as they are easily seen and hard to conceal without compromising the weathertighness of the dwelling. Because of its visibility, it is essential to create clean straight lines either by using a uPVC moulding or cover flashings.

Parapet Type 2

4.8 Soffit & Eaves

The eaves or roof overhang play a significant role in the comfort performance of the building. Eaves or overhangs are used to shade the walls from the summer sun, while capturing the sun’s heat in the winter. Eaves will reduce glancing light, which highlights the wall surface. Glancing light is the light that is nearly parallel to the surface of the wall and casts visible shadows and uneven projections of the surface finish QT EcoSeries Wall Panels can be installed to suit various soffit designs and details.

 

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