Collier & Henry Concrete spearheaded the development of the beam and block solutions for Part E and the Robust Detail applications. Now, following rigorous development and testing we are proud to announce that our new flooring systems have achieved Robust Detail accreditation.

General Product Information

Infill Blocks

The standard infill block is a solid, 1950Kg/m3 dense 440 x 215 x 100mm, manufactured to BS6073. Part 1 1981, with a compressive strength of 7.0 N/mm2.

Lightweight blocks can be used if required.

Carrying Partitions

Lightweight partitions can be carried on infill blocks. Where required, our layout drawing will indicate where extra beams are needed to support heavier partitions.

Floor finishes

A variety of floor finishes can be applied, the most common being either a sand and cement screed or a lightweight floating finish.

Where flooring is to be used in garages, and in other applications where the floor may be prone to heavy point loads, it will be necessary to apply a reinforced concrete screed utilising A98 mesh or similar.

Tolerances

Beams have an upward camber of approximately 1/300th of the span. A small variation may exist, in particular when beams of notably different lengths are used.

Cantilever

Special units are available to form canilevers for balconies, bay windows etc. Contact our design office for further information.

Bearings

Beams are normally supported on a 100mm minimum brick or blockwork, or a minimum or 75mm on steelwork.

Where ledger angles are used the tops of the beams can be notched to fit neatly under the main steelwork.

On intermediate walls/steelwork the beams can be staggered. However, in certain circumstances, it may be economically advantageous to increase the width of intermediate walls to 215mm avoiding the need to stagger.

Site Preparation

The main contractor is responsible for the foundations and DPC.

All bearings must be true and level. All brickwork and blockwork must be sufficiently mature to ensure safe means of installation.

All lintels and support steel should be securely in position 'built in' or bolted down.

At ground floor level, a void of 150mm should be maintained under the floor, with any top soil and vegetable matter removed prior to installtion of the floor.

Ventilation of the void is normally required and should be in compliance with local authority requirements.

Suitable access and hardstanding should be provided for delivery vehicles.

Where our installation service is provided suitable access, hardstanding and aerial clearance for our mobile crane will also be required.

For installation at upper floor levels, the general contractor will be responsible for the provision and erection of all internal and external safety scaffolding / protection from falls from height and the necessary secured ladder access in order to comply with all relevant health and safety legislation.

Fire Resistance

All our floors hav at least one hour fire resistance. For greater resistance, contact our design office.

Handling / Installation

Joists should be set out carefully using infill blocks to acheive the correct spacing in accordance with the supplied layout drawing. It is good practice to grout the floor after installation to prevent movement of infill blocks. If it is necessary to stack beams on site, they should be supported near to their ends with skids placed directly one above another.

Beams should be lifted at points near to the ends and kept upright

150mm Full Depth Block

The CHC full depth solid infill block is available, but will not be quoted unless specified. The full depth block has similar dimensions to the standard infill block and comes in two sizes. With a nominal crushing strength of 10.5N/mm2 and density of either 1450 or 1950kg/m2.

The block can be used as an edge or end block with our 150mm series flooring or to carry heavy partition walls.