Site contains some useful concrete information.
Coltman Precast Concrete Limited - Design, manufacture and install prestressed hollowcore floor slabs, solid planks, and beam and block flooring. Conspare Ltd - Supplies the concrete industry with mixers, wear parts, spare parts, control systems, vibrators, moisture measurement and workability control. Links to newsgroups employers and suppliers. Halfen Ltd UK - Supplier of channel fixing systems, brickwork and cladding supports, concrete reinforcement and precast concrete lifting systems. All units are made to measure to suit individual requirements.