CSCS Self-Erect Crane case studies
CSCS Self-Erect Crane · Put your knowledge to work in context.
The CSCS Self-Erect Crane credential is aimed at operators and erectors who work with self-erecting tower cranes - the compact, trailer- or ballast-mounted cranes that fold out, erect themselves and are common on smaller housing and commercial sites. It signals that a candidate understands the machine as both a lifting device and a structure that has to be assembled, jacked and taken down safely. The CSCS Self-Erect Crane case studies are 5 cases and about 2,994 words.
1Ground Bearing Under a Track-Mounted Self-Erector
A 6-tonne-capacity self-erecting crane is to be sited on a compacted hardcore pad behind a new warehouse. The pad sits over a backfilled drainage trench 1.2 m deep running diagonally beneath one corner of the proposed footprint.
533 words, about 3 min2Erection Adjacent to an Overhead Line
A self-erecting crane is being installed in a yard to service a two-storey building refurbishment. On the second day of erection, the erector notices an 11 kV overhead line running along the boundary, approximately 9 m from the proposed slew centre.
588 words, about 3 min3Load Chart Selection at Maximum Radius
A self-erecting crane with a maximum capacity of 4 t is being used to lift a prefabricated plant room module weighing 1.85 t. The module is 3.2 m long, 2.4 m wide and 2.6 m high, and its centre of gravity is offset 400 mm from its geometric centre because of an internal pump set.
638 words, about 3 min4Climbing Sequence and Wind
A self-erecting crane is being climbed from 12 m to its maximum free-standing height of 21 m to serve a three-storey building. The climb is carried out using the crane's own jacking system with the mast sections added from the base.
602 words, about 3 min5Pre-Use Inspection Findings and Fitness to Lift
A self-erecting crane has been on site for three months. During the weekly inspection the following are found: (a) the load moment indicator (LMI) displays a reading but the audible overload alarm does not sound when tested with the test function; (b) one of the four outrigger beams shows a 15 mm crack in the weld at the beam-to-chassis connection; (c) the hook block's safety catch is stiff but closes; (d) the wire rope has two broken wires in one lay length, against a manufacturer's discard criterion of six in one lay length; (e) the slew brake holds but there is slight creep when parked on a 1° slope.
633 words, about 3 min