Civil Engineering Reference
In-Depth Information
FIGURE 3.59
Roller support for the bridge.
3.13 CRANE LOADS
Normally, the deck crane is installed over a cylindrical pedestal extending to the
required level of its fixation. The cylindrical pedestal may contain an inverted,
truncated conical transition part in order to reduce the large diameter of the ped-
estal to the size of the deck leg where the pedestal should be connected.
The cylindrical pedestal, including the conical transition, should be checked
for all crane loading conditions. The design engineer should verify that the
loads supplied by the crane supplier are rated loads (i.e., including the dynamic
amplification) according to the API 2C or Lloyd
s Register rules for lifting
appliances and that the wind load is considered in the load combinations.
In addition to the static analysis of stresses, a check for fatigue should be
considered.
Stress analysis should be carried out according to API RP2A.
The static and dynamic crane loads should be based on data provided by the
crane manufacturer
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3.14 LIFT INSTALLATION LOADS
Lifting forces are functions of the weight of the structural component being
lifted, the number and location of lifting eyes used for the lift, the angle between
each sling and the vertical axis and the conditions under which the lift is
performed.
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