Abstract: The present invention relates to the construction of buildings as well as elements, structures and methods used in their construction. There is described a pre-fabricated formwork module (12) for a building portion. The module 12 includes two or more panels (14) each including a boundary portion (18) and one or more projecting structures (16). In the module (12) the panels are arranged such that their boundary portions (18) together define a first substantially continuous boundary for forming concrete and the projecting structures (18) project from the boundary into the concrete. The module (12) also include one or more reinforcing bars (30A) fixed, e.g. fixed to the projecting structures, in position relative to the boundary for transport and to reinforce the concrete.

Abstract: The invention provides a method of building a building having a plurality of levels using. The building includes a plurality of building unit assemblies (2) wherein each building unit assembly is structurally self supporting and has at least one sidewall (4), a floor (8) and a roof (10), the method including the steps of: lifting the building unit assemblies (2) into position in the building so that each level of the building includes a predetermined number of units (2); connecting adjacent units (2) to one another in each level; and connecting units (2) in one level to corresponding units in at least one adjacent level that is vertically above or below the one level. In one form the building unit assembly (2) includes a building unit including two sidewalls (4) and (6) floor (8) and roof (10) with structural frame segments (16, 18, 20, 22) attached thereto.