Self – Climbing Placing Boom
A climbing concrete placing boom mainly consists of the tower body, climbing frames, slewing mechanism, upper-lower pedestals, boom assembly, hydraulic system, electrical system, etc., and is suitable for the construction of high-rise buildings. It is fixed in the lift shafts or floor openings and climbs up by means of its climbing system or a tower crane, providing enhanced efﬁciency and quality of concrete placement and saving labor.
Self-climbing in the lift shafts
The placing boom climbs up along the lift shaft with the rising of the ﬂoors, with horizontal reaches of 28m and 24m.
Self-climbing in the floor openings
The placing boom climbs up along the ﬂoor openings with the rising of the ﬂoors, with horizontal reaches of 32m, 28m, 24m and 17m.
Tower crane-aided climbing in the floor openings (Model HGY17)
The HGY17 places concrete by ﬁxing it in the prepared openings in the ﬂoor plates. When the placing boom is required to climb up, lift it up to a higher ﬂoor by means of a tower crane so as to ﬁx its tower body in the prepared openings in the ﬂoor plates with the help of its climbing frames. In case of large square concrete placement, more tower bodies can be mounted in different openings to match with the boom assembly that is disassembled from one location and then lifted to the designated location. This type of placing boom is unable to climb up by itself, but with the help of a tower crane it can perform as a self-climbing one or a mobile one, and has the following advantages:
■ Prepared openings can be built in different locations according to job requirements to make full use of the length of boom sections.
■ Transfer of the boom assembly to different tower bodies that have been fixed in the openings can realize the function of a mobile placing boom.
■ It only needs a tower crane to lift it up to a higher floor for being fixed, eliminating the need for a self-climbing mechanism, and proving compact structure, easy operation, safety, reliability and good economy.