Design recommendations

Dryness of Concrete
Excessive moisture from cast in situ slabs and screeds which have not dried out can have adverse effects on flooring materials and timber components. BS 8201:1987 (Code of practice for flooring of timber, timber products and wood based panel products) states that “it is reasonable to recommend that the concrete be considered dry when the relative humidity falls to 75% or less” (when tested by use of a hygrometer). Where the dryness of concrete cannot be guaranteed it is recommended that a vapour barrier is installed (minimum 1000 guage).

It is anticipated that in most cases partitions will be erected from the subfloor and not on top of the floating floor. If non loadbearing, lightweight metal stud partitions are to be erected on top of the floating floors contact Danskin for an appropriate detail.

The provision of access to services is most successful if the location of services is detailed at an early stage. Services should be kept at least 150mm away from walls to allow space for perimeter Support Bearers.

Component spacings are calculated in accordance with BS6399-1:1996. In kitchens and bathrooms Support Bearer centres should be reduced to 300mm. Danskin must be consulted for guidance if the design loadings exceed domestic loadings as specified in the above document or if extraordinary local loadings are anticipated. Storage heaters are considered to be an extraordinary loading and may require support direct from the subfloor, independent of the floating floor.

Ceramic Tiles
As acoustic floors are designed to deflect vertically in order to reduce impact sound there are inherent risks in laying ceramic tiles on top of floating floors. However the risks can be significantly reduced by good detailing and the use of modern flexible adhesives. Ceramic tiles have been successfully laid on the Saddle System in numerous projects over many years. Contact the Sales Department for specialist advice.

Underflooring Heating
Danskin Saddle Systems can physically integrate with many underfloor heating systems. Please contact Danskin at an early stage if it is intended to use underfloor heating in conjunction with the Danskin Saddle System as it is important to avoid drying out of timber components.

Communal Areas in Flats
BS6399-1:1996 imposes more onerous load bearing requirements for communal areas in certain designs of flatted developments. Concentrated load requirements over the long term can be as high as 4.5kN. The maximum capacity of 22mm chipboard at reduced centres is 2.7kN. If it is intended to lay the Danskin Saddle System in communal areas in flats such as common corridors, hallways, stairs and landings it is essential to contact Danskin for specific advice regarding the floor boarding and component centres.

Typical Details

Threshold Detail

Support of Perimeter Bearers

Support of short edges

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