8.2.1 Self-Raising Forms

In the last decade self-raising forms have become more popular in construction involving repetitive vertical forming. Their popularity may be attributed to the fact that they raise themselves, without crane assistance, in sequence with the casting operations. This crane independent system is very efficient in congested sites. Therefore crane costs and construction time are reduced. In addi­tion, the concrete finish resulting from using self-raising forms is of higher quality than the one produced by slipform.

Self-raising forms have not been limited to the construction of exterior building walls. They have also been used to construct building columns, dam faces, nuclear reactor containment, cooling towers, bridge piers and elevator shafts. Along with special attached form liners, a wide range of different architectural fin­ishes or textures can be obtained.