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This invention relates to a building structure which is made by spraying concrete onto shuttering which itself becomes incorporated into the structure. This structure has an exterior wall which comprises layers of cementitious material which have been formed by spraying that material against shutter

This invention relates to a building structure which is made by spraying concrete onto shuttering which itself becomes incorporated into the structure. This structure has an exterior wall which comprises layers of cementitious material which have been formed by spraying that material against shuttering sheets sandwiched between the two layers, the shuttering sheets being spaced apart to define a cavity between themselves, a number of upright beams spaced from one another and each comprising one or more zig-zag reinforcing bars extending in a generally upright direction and spanning the air gap with the points of the zig-zags extending through the respective shuttering sheet and embedded within and anchored to the respective layer of cementitious material so that the two layers of cementitious material are tied together by the reinforcing bars, and at least one metal reinforcement mesh embedded within each layer of cementitious material and attached to the points of the reinforcing bars embedded within that layer.

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