Heavy Duty Assisted Lift Trunnion Operation and Maintenance Manual
Form Reference
C64.65546
Issue
5.00
11 of 39
Issue Date
May 2021
Each individual signal dataset then undergoes a set of structural calculations to confirm it
complies with PAN/E/CE 0017 (Project Advice Note – Signal Structures – ‘Form A’ Guidance for
Loading and Performance’). This, together with the restrictions on signal head configurations
included within the generic F001, F002, and F003 submission, delivers a robust system that
mitigates the risk of the safe working load on the Signal Post and HD ALT Assembly being
exceeded.
Only if all of the deflection and safety calculations are within limits will a manufacturing, stress
and loading drawing be produced for final sign off by the customer. Manufacturing begins when
the signed drawing is received by Unipart Dorman.
The HD ALT spring system is designed to provide mechanical advantage to personnel engaged
in manually lifting or lowering the signal about the vertical position. To give some guidance on
the force required to operate the HD ALT system and consequently the
suggested
amount of
workers needed to complete the task safely, Unipart Dorman has produced a lifting force graph
as shown in Appendix A.
It is impossible to determine the site conditions, capability of the persons
engaged in the operation and other variables at each individual location.
Therefore, the data shown in the Appendix is solely provided to
assist
in the
formulation of individual site risk assessments and method statements etc.
Unipart Dorman does not accept any responsibility for misuse of this guidance data,
which subsequently causes injury or damage
