Technical information

562600-000, Issue1.0, March 2014
22 of 57
7.8 Lifting Duty Safety Factors
The maximum safe working load will appear at the top right of the screen and is stated in
TONNES. This maximum load is for the currently active lifting duty / lifting point. Lifting
duties are automatically selected using a combination of chassis status, axle lock status,
slew angle, chassis angle and switch inputs. Altering the duty will not affect the current
lifting point selected, see section 7.7.1.
If a particular lift is limited by hydraulic capacity (87% of Main Relief Valve pressure)
rather than stability, the maximum safe working load will be shown in RED. The maximum
load is stated as a percentage of the ‘tipping load’ and in a standard installation will con-
form to the table shown below :
Lifting regime Safety factor Notes
Road 75% All road lifting duties regardless of chassis angles and oscillating axle lock
status.
Network Rail 67% Lift and carry - oscillating axle unlocked
Network Rail 75% or 90% Static lift - oscillating axle locked. The maximum load will be either 90% of
a load necessary to totally unload a single rail wheel, or 75% of a load
necessary to totally unload two rail wheels - whichever is the lowest.
Tandem Lifting 67% of the current
safety factor
If ‘Tandem Lifting’ mode is selected all duties will revert to this safety factor
regardless of bogie position, chassis angle or oscillating axle lock status.
LUL 75% All LUL lifting duties regardless of chassis angles and oscillating axle lock
status.