Safety alert 09/2016 Fatalities caused by falling trailer ramps
In recent years, two people have died as a result of crush injuries from falling trailer ramps. The trailer ramps were operated by a sealed hydraulic system. In both incidents, the ramps had earlier been raised by external means. In one incident the ramps had been pushed up by a forklift, in the other by a front end loader. This created a vacuum in the sealed hydraulic system, causing the ramps to fall down suddenly when the safety chains were removed.
- Raising hydraulic ramps by external means, such as a forklift, front-end loader or crane, creates a vacuum in the sealed hydraulic system.
- Persons too close to or in the fall zone of a ramp.
- No information or training to truck drivers, yard and maintenance staff and other relevant employees in relation to the risk of ramps falling down when a vacuum has been created in the sealed hydraulic system after raising ramps by external means.
- Inadequate reporting system for hazards associated with inoperable ramps.
- No functional testing after ramp has been raised by external means to ensure the vacuum is removed from the sealed hydraulic system.
- Avoid raising hydraulic ramps by external means such as a forklift, front-end loader or crane where possible.
- Never stand in or near the fall zone of any unsecured trailer ramp.
- Develop and implement a procedure for dealing with inoperable ramps, eg
- if ramp is stuck in down position, find the cause and make repairs before raising the ramps normally; and
- if ramp is stuck in down position and has to be raised by external means, ensure the ramp is immediately secured, tagged-out and inspected and tested by a competent person before returning into operation.
- Provide information and training to truck drivers, yard, maintenance and other relevant staff about:
- the risk of ramps falling down when there is a vacuum in the hydraulic system, eg after raising ramps by external means; and
- the procedure to follow when a ramp is inoperable.
- Develop a reporting system for hazards associated with ramps, and deal with these reports with high priority.
- Ensure causal factors of hydraulic failure, such as a flat battery or hydraulic oil leak, are identified and controlled.
- Conduct appropriate pre-start checks of trailer, including a visual inspection of the hydraulic system and where practicable, test the operation of the hydraulic system.
- Display signage on trailer warning people to remain clear of ramps at all times.
To prevent ramps falling down in other situations, such as hydraulic hose failure, consider fitting appropriate safety devices such as an over centre valve to hydraulic systems.
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