Just in case your not gonna sleep untill you do know
The principal contractor
A principal contractor has an obligation to ensure the overall coordination of the lifting operations on an ongoing basis. This includes ensuring systems are in place that facilitate communication between all relevant persons and workers at the workplace for overlapping areas of work.
For tower cranes, the principal contractor is responsible for:
ensuring safe and suitable equipment has been provided to meet the requirements of the job;
ensuring all persons involved in the maintenance, repair, transport and assembly of the tower crane are trained and experienced;
ensuring relevant persons employ workers with the appropriate certificate to work in a prescribed occupation21;
defining roles and responsibilities for all persons involved with the crane operation; and
ensuring a maintenance and inspection program is in place while the crane is provided as common plant.
The crane owner
A crane owner must ensure that only persons with the appropriate tower crane certificate operate the tower crane. Additionally, the crane owner who employs crane operators should also ensure that operators have undergone familiarisation and refresher training as required under this code.
A crane owner must ensure that the crane manuals for operation, servicing and maintenance are readily available to those who need them (e.g. the crane manufacturer's operating manual should be kept on the crane, and maintenance staff should have access to all current crane maintenance manuals).
Prior to supplying a tower crane, a crane owner should obtain a clear understanding of the characteristics of the job, site conditions, restrictions and hazards. This may involve conducting a site visit and inspection to ensure that an appropriate crane is supplied for the construction work.
A crane owner should ensure that the crane supplied is fit for purpose and suitable for application in its intended use. This includes items supplied with the crane by the crane manufacturer (e.g. temperature control units and adequate seating) being provided and maintained in a serviceable condition according to the crane manufacturer's instructions.
The crane operator
A crane operator must always exercise proper diligence and operate the crane safely. If the crane operator has reason to believe that a lift may be dangerous or unsafe, the operator must refuse to proceed until the concern has been reported, relevant risks have been managed and safe conditions have been confirmed.
If the load is obstructed from the dogger's view at any time during the lifting operation, the operator may need to assume control of the load until the load comes back into view of the dogger.
Tower crane operators are required to know:
the particular model of crane to be operated, its characteristics, functions and limitations;
the information in the crane's operating manual;
the crane's load chart, including all notes and warnings, and how to calculate or determine the crane's actual net capacity in every possible configuration;
proper inspection and maintenance procedures to be followed in accordance with the guidelines of the manufacturer and owner;
any site conditions that may affect crane operations, including the presence of overhead powerlines, nearby structures, other cranes and concrete placement booms; and
basic slinging techniques.
Before and during crane operations, the crane operator must:
check unauthorised persons are not present on the crane;
check each crane motion is safe and without risk; and
complete the daily inspection checklist, including filling out the crane logbook.
The primary role of a dogger is to assist the crane operator in the safe and efficient operation of the crane. This includes safe slinging of the load and providing clear directions to the crane operator. The use of a dogger is crucial when the crane operator's vision is obscured or when operating in high risk areas. Doggers must be positioned to safely observe the entire lifting operation that they are responsible for. However, a dogger should not be used to also perform the role of a 'spotter' when the crane is operating close to overhead powerlines.
A dogger must be in control of the load from the time it is hoisted until it is placed in position. If a load is being controlled by more than one dogger, the different doggers must know what part of the lifting operation they are responsible for.
Doggers are required to know how to:
use the various types of ropes, slings, chains and lifting accessories;
determine the safe working loads (SWL) of any rope, sling or chain to be used for lifting;
assess the weights of loads to be lifted;
safely sling loads of different weights and sizes;
direct a crane or hoist operator in the movement of a load when the load is out of the operator's view; and
give appropriate directions when directing loads.
Before directing the crane operator to raise a load, the dogger must ensure:
each lifting attachment, sling and shackle has an SWL, or working load limit greater than or equal to that of the load. These attachments must be suitable for safely handling the load;
the hoisting apparatus is correctly applied to the load and the crane hook;
no part of the load is loose;
the load is properly balanced;
the load is not snagged; and
the load will not contact any object or constitute a hazard to any person when it is lifted.