A variable assembly PC member includes: a plurality of hollow PC modules, each of which has an upper flange and a lower flange spaced apart from each other, and a pair of webs connecting both ends of the upper flange and the lower flange to form a hollow therein; and connectors connecting the plurality of hollow PC modules with each other in the width direction.

The present invention is based on the construction of sustainable homes, which are built from the following structural elements or components: A foundation slab, some walls built from tongue-and-groove pieces or blocks, A mezzanine roof slab and/or roof terrace, an arrangement of a recirculating system that saves drinking water with temperature control; A water-saving recirculating system arrangement in showers.

The present invention relates to forms for forming poured-in-situ vertical concrete walls, columns, floors and parapets of residential or commercial buildings, in particular a form having at least one precast reinforced concrete panel.

Formwork for constructing a floor system in a building, the formwork comprising: a plurality of pre-cast concrete joists positioned in a generally parallel arrangement, wherein one or more of the joists comprises: a horizontal base portion; and an upwardly directed portion extending substantially along the length of the joist, the upwardly directed portion having spaced apart surfaces extending upwardly from the base wherein respective shelf portions of the base are located adjacent said upwardly directed portion; a plurality of pre-cast concrete members for extending along a length of the joists for receiving wet concrete; and a supporting arrangement to support opposite ends each of the pre-cast concrete members upon oppositely arranged shelf portions of two adjacent joists.

Formwork for building a wall system, the formwork comprising: a first pre-cast concrete wall panel and a second pre-cast concrete wall panel, the first wall panel being adapted for being positioned in a spaced relationship with the second wall panel; a hollow core defined by oppositely arranged surfaces of the first and second wall panels, the core being adapted for receiving wet concrete; and a connecting arrangement for inter-connecting the first wall panel with the second wall panel in the spaced relationship, the connecting arrangement extending generally in an outwardly direction relative to said oppositely arranged surfaces of the first and second wall panels.

A variable assembly PC member includes: a plurality of hollow PC modules, each of which has an upper flange and a lower flange spaced apart from each other, and a pair of webs connecting both ends of the upper flange and the lower flange to form a hollow therein; and connectors connecting the plurality of hollow PC modules with each other in the width direction.