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building with aac

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1.0 Introduction

CSR Panel Systems is a division of CSR Building Products Limited, one of Australia’s leading building products companies.

CSR Panel Systems manufactures Hebel Autoclaved Aerated Concrete (AAC). The AAC in Hebel products is manufactured from sand, lime and cement to which a gas-forming agent is added. The liberated gas expands the mixture, forming extremely small, finely dispersed air pockets, resulting in lightweight aerated concrete.

CSR Panel Systems has manufactured Hebel products that have won wide acceptance as innovative and environmentally preferable building materials. This is due to their lightweight nature, excellent thermal, fire and acoustic properties and design versatility. These inherent properties of Hebel products help achieve quick and cost efficient construction practices as well as providing for comfortable operating environments inside the buildings all year round.

Build a premium home with Hebel PowerBlock 

Hebel PowerBlocks are large AAC Blocks with a standard face dimension of 600mm x 200mm, laid in much the same way as bricks but using Hebel Adhesive to form a monolithic structure. Typically, external walls use a single skin of 250mm thick blocks while internal, non-loadbearing walls use 100mm thick blocks. Hebel’s tight manufacturing tolerances deliver beautifully flat, true surfaces that are easily rendered and painted.

Walls built with Hebel PowerBlock are strong and durable, providing the security of solid masonry coupled with exceptional thermal and acoustic insulation properties. With over three times the thermal resistance of double brick, Hebel PowerBlocks exceed the Building Code of Australia (BCA) for energy efficiency regulations for zones 1,2, 3 and 5 without the need for additional bulk insulation.

Hebel PowerBlocks are non combustible and can achieve an Fire Resistance Level (FRL) of up to 240/240/240.

For detached houses, this is well above the requirements for building right up to the boundary line and making Hebel an ideal choice for bushfire prone areas.

Compared to traditional double brick construction, Hebel PowerBlock walls can be laid much faster, saving building time and costs. Building with Hebel Blocks may create more internal floor area for the same building dimensions.

Hebel Lintels can be used over windows, doors and garage door openings. Hebel also supplies sill blocks for under windows to complement the overall look of your home.

Fig 1.1 Isometric Concept House

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14.0 Construction Details (Typical)

Base of Wall

Fig 14.1 Hebel PowerBlock work on Stiffened Raft Slab Edge Foundation (elevation)


Fig 14.2 Hebel PowerBlock work showing infill block to slab rebate (elevation)


Fig 14.3 Internal Load Bearing Hebel PowerBlock work on stiffened raft slab foundation (elevation)


Fig 14.4 Concrete PowerBlock Sub-Floor Detail (elevation)


Fig 14.5 Roof Top to Plate Fixing to Hebel Wall – Strap (elevation) – for vaulted/cathedral roofs


Fig 14.6 Roof Top to Plate Fixing to Hebel Wall – Strap (elevation) – for typical trussed roof


Fig 14.7  Strap Fixing to Hebel Walls (isometric – typical trussed roof)


Fig 14.8  Double Brick Sub-Floor Detail (elevation)


Fig 14.9 Ring Beam Internal Non-Loadbearing Wall (elevation)

Top of Wall

Fig 14.10 Internal Hebel Load Bearing Wall and Timber Floor Frame Junction (elevation)


Fig 14.11 Truss Spanning Over Non-Load Bearing Hebel Walls (elevation)


Fig 14.12 Timber Truss/Joist Fixed to Hebel Walls (elevation)


Fig 14.13  Tiled Roof Eve and Hebel Wall Junction (elevation)


Fig 14.14  Vaulted Ceiling & Roof Top Plate Fixing To Hebel  Wall (elevation)

Wall Junctions

Fig 14.15  External Wall and Internal Partition Wall Junction  (plan)


Fig 14.16  External Corner with Control Joint (plan)

Control Joints

Fig 14.17 Control Joint detail (elevation)


Fig 14.18 Typical Bond Beam Control Joint – elevation


Fig 14.19 Typical Control Joint – plan 


Fig 14.20 Typical Ring Beam Control Joint – elevation


Fig 14.21 Hebel PowerBlock work Typical Movement Joint Detail (elevation)


Fig 14.22 Hebel PowerBlock work Typical Movement Joint Detail (plan)


Fig 14.23 Built-in Column Detail (plan)


Fig 14.24 Built-in Column Detail (elevation)


Fig 14.25 Non-Load Bearing Hebel PowerBlock Wall and Hebel Floor Panel Detail (elevation)


Fig 14.26 Loadbearing Hebel PowerBlock Wall and Floor Panel Junction Detail (elevation)


Fig 14.27  Loadbearing Hebel PowerBlock Wall and Timber Floor Frame Junction Detail (elevation)


Fig 14.28 Timber Floor Support Detail (elevation)


Fig 14.29  Hebel Flooring Panels using Ring Anchor Construction on Load Bearing Interior Wall (elevation)


Fig 14.30 Ceiling Support Detail A (elevation)


Fig 14.31  Ceiling Support Detail B (isometric)

NOTE: Refer to section 7.12 of the Hebel Technical Manual for the full set of Details on the Floor Panel System.

Balcony and Deck

Fig 14.32  Balcony Detail (elevation)


Fig 14.33  Balcony Detail (elevation)


Fig 14.34  Deck Connection Detail (side elevation)


Fig 14.35 Deck Connection Detail (front elevation)


Fig 14.36  Stairwell (isometric)


Fig 14.37  Stair Tread Set-Out (isometric)


Fig 14.38 200mm wide x 50mm thick Hebel PowerBlocks adhered to walls on their ends to provide support for treads (isometric)


Fig 14.39 Steel Door Frame (Internal or External) to Hebel Wall Fixing (plan)


Fig 14.40  Steel Door Frame (Internal or External) to Hebel Wall Fixing (plan)


Fig 14.41  Timber Door Frame (External) to Hebel Wall Fixing (plan)


Fig 14.42  Timber Door Frame (Internal) to Hebel Wall Fixing (plan)


Fig 14.43  Aluminium Window Frame – Window Sill Detail (elevation)


Fig 14.44 Aluminium Window Frame – Window Jamb Detail (elevation)


Fig 14.45  Aluminium Window Frame – Window Head Detail (elevation)


Fig 14.46 Lintel Installation
(a) Elevation

(b) Section

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