Contractor Crane Topple Incident
PRELIMINARY: INVESTIGATION ONGOING
At about 1330hrs on Saturday December 20, 2008, a
70 ton Groove crane toppled whilst it was being
brought into operation for the loading of pipe spools
The crane operator jumped out of his cabin as the
crane fell to the ground and neither he nor other
workers in the vicinity suffered injury
RAM Rating Actual : Asset 1
Potential: People 4B
Carbon Steel Shop
4 1. Parked position of Crane
Paintin 2. Rigger in Container hung web sling
g Shop 3. Crane fall position
4. Position of Assistance Rigger Supv &
FALLEN GROOVE CRANE
Foreman & Piping Position of Rigger
Engineer. No. 1 /Container that
was being loaded
CRANE ON GROUND WITH RETRACTED OUTRIGGERS
Piping Engineer &
Typical Crane with Fully Extended Outrigger
EVENTS LEADING UP TO INCIDENT:
0703hrs: Crew had tool box talk
0805hrs: Crew of an operator, three riggers, one banks man and one flagman
assigned lifting operation. Assignment was to lift a container
already loaded with spool onto a truck for despatch to CPF.
0840hrs: Crew commenced second assignment of loading long pipe spools into
0930hrs: Supervisor directed that loaded spools be offloaded from container
as they can loaded directly onto the truck.
0955hrs: Long spools from container offloaded
1020hrs: Loading of short spools into open top 40ft container commenced.
1140hrs: Loading of spool into container still in progress. Crew breaks for
lunch with assignment yet to be completed.
SEQUENCE OF EVENTS.
1305hrs: A rigger arrived from lunch
Piping Manager saw crane key on his desk, expressed concern over
delay in re-start of work after lunch. He gave the key to his
piping engineer and instructed crew to resume work.
1320hrs: Operator arrives along with a second rigger. Operator collects key
from first rigger and proceed to start the Crane.
1325hrs: The two riggers available positioned themselves for the spool
loading activity, one at location of spools for slinging and the
other inside the container for receiving spools from crane.
One of the rigger unhooked crane block and gave signal for operator
to hoist up. Operator telescope crane boom and swung to direction
of the container. Rigger in container hung web sling.
Operator hoisted up, swung to the direction where the spools are to
be loaded. Crane became unbalanced, operator attempted
unsuccessfully to recover by retracting boom and swinging the boom
back, raised alarm, jumped out of cabin, crane fell to the ground.
MAIN FINDINGS - 1
1. Crane toppled because it was brought into operation without outriggers
2. The outriggers were used during the morning operations though the crane
was shut down and outriggers retracted at lunchtime (normal practice)
and outriggers not re-extended upon commencement of the afternoon’s
3. Crane was not on load at time of incident with ground conditions
4. Crew on duty at time of incident was incomplete – Flagman and Banksman
were absent after lunch
5. PTW approved for work is with attached JHA and work method statement
but no Lifting Plan.
6. Chain of command between the separate Piping and Rigging departments
became confused. Piping Managers intervention with the crane crew was
taken as an instruction to commence work.
7. There was evidence of poor job planning (double handling of long spools
prevented the activity from being completed before lunch)
8. Equipment maintenance record indicate regular maintenance of crane.
1. Crew appeared agitated because of extended duration of work; workers
expecting that xxxxxxxx would allow them to close early for Christmas
2. December payslip was issued to workers the previous day but money was
yet to be released to bank by xxxxxxxx at time of incident.
3. Some of the crew members did not return after lunch, purportedly
because food vendors were unavailable.
4. Crane operator competent, ASME B30.5 certified with relevant Drivers
5. Container being loaded was scheduled for despatch to CPF that same
day (it is unlikely that it could have completed the journey before
6. Minor hydrocarbon spill observed at scene of incident.
7. Safety alert to operators and drivers on the need to walk around
equipment prior to start of work was communicated but not implemented
in this instance