The beam and base method of underpinning is a more technically advanced adaptation of traditional mass concrete underpinning.
A reinforced concrete beam is constructed below, above or in replacement of the existing footing. The beam then transfers the load of the building to mass concrete bases, which are constructed at designed strategic locations.
Base sizes and depths are dependent upon the prevailing ground conditions. Beam design is dependent upon the configuration of the building and the applied loads.
Left: Property up on sacrificial jacks showing antiheave. Right: Reinforcement for beam tied into position.
Left: Timber shuttering in place ready for casting beam. Right: Beam cast.
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