Other attachments are operational and defect-free.
Work Site Pre-operational Checks
Firm, level ground.
Outriggers fully extended and support legs on supplemental pads.
Wheels checked where necessary.
Load weights and rigging checked against the crane load chart.
Proper rigging procedures used.
No unauthorised personnel in the operating zone.
Boom/load kept clear of people and objects.
Signal person assigned where necessary.
Work area checked; problems reported to supervisor.
APPENDIX 3 SAFETY INSPECTION INTERVALS
Lightly loaded vehicles/easy operating conditions: 13 to 6 weeks.
General haulage/trunking: 10 to 5 weeks.
Arduous work/constant heavy loads: 8 to 4 weeks.
Off-road/difficult conditions: 4 weeks.
Vehicles 12 years or older: 6 weeks.
The material specifically states that vehicles and trailers 12 years or older should have a safety inspection every 6 weeks irrespective of distance travelled.
The graph is based on operating conditions and average annual distance, but the inspection schedule is expressed as a time interval.