Abstract: A formwork for precast concrete panel comprises of a quadrangle panel with a base and four side panels. The formwork (10) comprises of a base (14), which is provided with an island region (20) and/or a mound region (22), a pair of parallel fixed spaced apart side panels (16) and a pair of parallel moveable side panels (18). The island region (20) and/or mound region (22) is positioned between the parallel moveable paced apart side panels (18) and wherein said parallel moveable spaced apart side panel (18) are removeably secured to the parallel fixed spaced apart side panels (16) in a tight manner in any desired distance from the center of the island (20) and/or mound (22) region.

Abstract: A building made substantially of pre-cast components is disclosed. The building comprises of pre-cast concrete walls, floors and columns; the walls and columns being made of pre-cast concrete wall panels; and floors being made of pre-cast concrete slabs. The panels have one of ‘L’, ‘T’, cross or ‘I’ cross-sectional shapes, wherein the ‘L’, ‘T’ and cross-shaped panels are joints between ‘I’ shaped panels and slabs and panels being interlocked together to form an enclosure. At least some of the ‘L’, ‘T’ or cross-shaped or ‘I’ have a door or window opening. ‘I’ shaped panels are of varying lengths. Columns are reinforced with steel bars and additional concrete.