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Steel Designers' Manual - 6th Edition (2003)
Fig. 33.14 A purpose-made lifting beam for cantilever erection
33.8.4 Crane layout
'4
It is important to decide on the type, size and number of cranes that are required
to carry out the work, since each has a designated range of positions relative to the
work it is to perform. These positions are then co-ordinated into an overall plan
which enables each crane to work without interfering with its neighbours, and at the
same time enables each to work in a position where adequate support can safely be
provided (see Fig. 33.16). This plan will then form the basis of the erection method
statement documentation.
A major factor in planning craneage is to ensure that access is both available and
adequate to enable the necessary quantity and size of components to be moved. On
large greenfield developments these movements may often have to take place along
common access roads used by all contractors and along routes which may be subject
to weight or size restrictions. On a tight urban site the access may be no more than
a narrow one-way street subject to major traffic congestion.
33.8.5 The safe use of cranes
Cranes and craneage 997
Mention has already been made of the UK Statutory Regulations. These lay down
not only requirements for safe access and safe working but also a series of test
requirements for cranes and other lifting appliances.