A concrete tower and related formwork and related method of construction

摘要

A collar assembly of or for a tower being formed by progressively higher concrete composition pours into reinforcement including formwork defined cavities, the assembly comprising or including; a higher subassembly adapted as a collar to selectively index to a zone of the tower being formed, a lower subassembly adapted as a collar to selectively index to a zone of the tower being formed, and a jacking arrangement whereby (I), when the lower subassembly is zone indexed and the higher subassembly is not, the higher subassembly can be raised relative to the lower subassembly and the zone to a fresh indexing height and (II), when the higher subassembly is zone indexed and the lower subassembly is not, the lower subassembly can be raised to a fresh indexing height.