Licence to perform dogging – dogman ticket
To enquire about next dogging course in Sydney, call 0430 103 357
If you put your mind to it, you will find learning of basic dogging skills and to obtain dogman ticket are fairly easy.
Learn your signals first.
Hand signals, whistle signals and fixed channel two way radios can be used to communicate signals to the crane operator. Official signals chart is available on crane/dogging tips page.
- Stop: 1 short
- Hoist Up: 2 short
- Hoist Down 1 long
- Slew Left: 1 long, 1 short
- Slew Right: 1 long, 2 short
- Boom Up: 3 short
- Boom Down: 4 short
- Boom Extend: 1 long, 3 short
- Boom Retract: 1 long, 4 short
To learn whistle signals correctly, try to listen to other dogmen giving whistle signals, if you get a chance. Same goes for hand signals. They are a bit different in real life than they might look like in picture.
One very important thing about giving signal to crane operator: decide firmly what movement you need and give firm, correct, clear signal – with any means.
Having dogman ticket doesn’t mean that you know everything, yet. Keep improving forever!
If working on a mobile crane – try to monitor the crane itself as well as load, at all times. Boom or any other part of superstructure might collide with existing or newly introduced objects or vehicles; ground might start giving way; crane might start leaking without operator noticing it etc.
Crane signals you can see on this website here.
Dogman ticket formulas
Working out your lifting slings requirements
In real life, when deciding how to lift something, you always consider the weight of load, size of load (for distance between the slinging points which determines the length of lifting gear) and all load factors; than you simply look at the tags on required lifting slings and make sure it meets the minimum requirement once all load factors are included.
If you are learning the requirements to get dogging licence or dogman ticket, you will need to be able to work out the minimum diameter of given lifting slings – grade XYZ chains or FSWR (Flexible Steel Wire Rope).
It works both ways – if you’re given the weight and load factors – you are required to work out the minimum diameter or if you are given the diameter – you work out what it can lift under certain circumstances.
We will cover both ways and include some very simple shortcuts.
Load factors are any additional loading that adds to the strain of lifting slings when they are under tension while lifting a load. They are angle factors and reeve factors. Have a look at the picture below:
Picture above represents and covers all scenarios that would be included in dogging class high risk work licence assessment. In our examples here, we will use “rule of thumb”. They provide approximate results, and exact load capacities should always be read directly from relative applicable chart for lifting slings.
Grades of chains:
- Grade T. Most chain being manufactured today for lifting is Grade T or 80 alloy steel. It is stamped T, 800, 80 or 8, HA PWB, or CM and various combinations of the above. It has become the most commonly used chain for lifting in industry.
- Grade P. Usually stamped P, 40, 4, or 04.
- Grade L. or 30 mild grade steel. Can be stamped L, 30 or 3.
- Special grade: Some manufacturers of chain have lifting chain with greater strength than Grade T. Follow manufacturers load ratings when using this chain.
- Other chain you may encounter: Transport chain. Some chain is specifically designed as lashing chain for securing loads in the transport industry. This chain may be classified as Grade 60, 70 or 75. Do not use these chains for lifting.
Make sure the horizontal distance between the points of attachment of the load does not exceed the length of the slings.
This will ensure the angle between the two legs of the sling does not exceed 60°.
- When slinging a rigid object with a multi-legged sling it must be assumed that only two of the sling legs are taking the load. Additional legs do not increase the SWL of the sling assembly.
- To work out the SWL of a multi-legged sling assembly, greatest angle is assessed on the diagonally opposite legs.
- If lifting flexible load/object and the load is evenly distributed make sure that each leg takes an even share of the load. All legs are assumed to be taking the weight.
- It is the duty of a dogger to direct the crane operator to position the head of the jib or the lifting assembly directly over the centre of load’s centre of gravity. Always lift vertically. If the hook is not directly over the load, the load will begin to swing as soon as it is raised.
- Dragging a load can put undue strain on the lifting gear and crane boom, can damage or destabilise the crane. You could lose your dogman ticket if you continue to make this mistake.
Flat webbing and round synthetic slings are in common use for lifting in Australian industry.
They are made from nylon, polyester, polypropylene or aramid polyamide.
Each sling must be labelled with the SWL.
Flat synthetic slings must comply with AS 1353. 1. Round synthetic webbing slings must comply with AS 4497. 1.
Inspection Synthetic slings must be inspected before each use.
They must also be inspected by a competent person – a minimum dogman ticket holder – at least once every three months. If a sling is subject to severe conditions the inspections should be more frequent.
If you have to work closer than the safe minimum distances, you need to get an exemption from relevant authority, have the electrical power shut off or isolated by competent person and comply with any conditions imposed in obtained permit. As a licensed dogman ticket holder you have to know and remember this.