Fixings

The following table shows a selection of block types vs application and suitable fixings from Fischer and Hilti. There are other fixing manufacturers available whose equivalent products would be suitable. Please contact our Technical Department for information.

• For heavy duty applications involving potential loading and vibration cycles, substitute any hollow blocks for solid blocks in the specific areas prone to high stresses.

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• Avoid placing the fixing within 50mm of the edge or top of the wall wherever possible.

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• Avoid fixing into mortar joints. If using chemical resin anchors, always follow the manufacturer’s instructions.

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• For Airtec aerated blocks, drill holes using HSS drill bits on a steady constant speed without hammer-action. Masonry drill bits are not recommended for Airtec blocks.

Light-Duty Fixings:

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Standard plastic plugs and screws are perfectly acceptable for most light duty applications such as fixing shelves and standard wall units. For Airtec blocks non-expandable fixings designed especially for aerated concrete blocks must be used.

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Medium-Duty Fixings:

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Plastic plug and screws are perfectly acceptable for most medium-duty applications such as fixing kitchen units, frame fixing and external fixings. For Airtec blocks fixings designed especially for aerated concrete blocks must be used.

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Heavy Duty Fixings:

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Wherever heavy-duty fixings are required, solid Dense concrete blocks should be considered where possible. However, resin anchor systems will satisfy heavy-duty requirements for all our block types and provide excellent, irreversible anchorage. Expanding anchors are not recommended for heavy-duty applications.

Due to the cellular structure of Airtec aerated blocks, fixings specifically designed for use with aerated concrete blocks should always be used. Standard expandable wall plugs are not suitable for use with Airtec blocks.