Patent ID: 9561632
Date: 2017-02-07
CPC Classifications: B28B,B29D

Claim:
1. A method forming an elongate support structure, the support structure having a central hollow portion, the method including: arranging an elongate core member to extend substantially horizontally, the elongate core member sized and shaped to correspond with the central hollow portion of the elongate support structure; forming a core assembly by locating at a first end of the elongate core member a first tensioning member, the first tensioning member including a plurality of tensioning elements extending from the first end of the elongate core member along the outside of the elongate core member to a second tensioning member located at the second end of the elongate core member; separating the first tensioning member from the second tensioning member by applying a separating force to increase a distance between the first and second tensioning members to be greater than a length an external mould assembly; attaching the external mould assembly to the core assembly between the first and second tensioning members by releasing the separating force to allow the first and second tensioning members to abut against ends of the external mould assembly to form a combined mould and core assembly, the external mould assembly being sized and shaped to form a cavity extending around and along the elongate core member through which the plurality of tensioning elements extend through; tensioning, the plurality of tensioning elements between the first and second tensioning, members, wherein the external mould assembly bears a compressive load caused by tensioning the plurality of tensioning elements; positioning the combined mould and core assembly to a substantially upright orientation; and injecting concrete into the cavity formed between the elongate core member and the external mould assembly to form the elongate support structure.