This is an extremely powerful technique when used in the right circumstances. The system can be developed to form a single beam opening, a simple column/beam opening or a full box frame. An entire building can be made open plan by use of this technique.
The system works by use of sacrificial supports placed in the wall within the depth of the proposed beam. This means that since there are no temporary works needles the beams can be placed right up to the underside of the ceilings. This is sometimes invaluable when working below occupied premises.
Originally developed as an RC beam for use in beam and base underpinning the system has been developed for many types of applications. The opening can be created by use of RC or steelwork, whichever is appropriate.