Atlas Concrete stock over 40,000lm from 600mm – 6mtrs all in 50mm increments. In 150mm deep section, 225mm beams are manufactured to order.

Ground Floors

A minimum void of 150mm must be provided between the soffit of the floor and the solum and a continuous damp proof course must be laid beneath the beams.

Infill blocks to be aerated, aggregate or concrete, 440 x 215 x 100mm. Minimum compressive strength of 3.5 N/mm-2 or 7.0 N//mm-2 with a traverse load capacity of 3.5kN or a 420 span.

For garage floor applications, blocks with 7.0 N/mm2 compressive strength should be used.

To seal the joints, the whole floor should be grouted with a nominal 3:1 sharp sand/cement mix as soon as possible after fixing the floor joists and blocks. Brush the grout over the floor with a stiff broom after the surface has been well ‘wetted’. Ensure the grout penetrates into the joints to provide a rigid construction.

Floor finishes applied directly to the grouted floor can be: chipboard/screed on insulation, screed or asphalt.

Upper Floors

Infill blocks to be aggregate or concrete, 440 x 215 x 100mm. Minimum compressive strength of 3.5 N.mm-2 or 7.0 N/mm-2 with a transverse load capacity of 3.5kN on a 420 mm span.

When the floor separates a dwelling from another dwelling, it has to comply with Building Regulations Approved Document E. This can be done by building to Robust Detail E-FC-6 or E-FC-7.

A plasterboard ceiling can be easily installed using metal clips, 50x50mm timber battens and plasterboard; this inevitably increases the fire resistance. See www.atlasconcrete.co.uk for ceiling clip details.

The floor when constructed with a plasterboard ceiling provides up to 1 hour fire resistance. The widened beam constructed as above provides up to 1 ½ hour fire resistance.

Where blocks are built into loadbearing walls the compressive strength must not be less than that of the blocks used in the wall construction. (applicable to both ground and upper floors)

Atlas Concrete Ltd are CHAS registered, Construction Line approved.

Part of Greenlight Safety Assessment Scheme.

Our beams are manufactured in wet cast beds giving them a superior finish. (Our beams are manufactured with C60 (60N.m2 at 28 days) concrete. 5mm & 7mm indented steel wire are used in the manufacturing process depending on design criteria.