Basic Hand Signals In Crane Operation
Cranes come in different types such as jib, gantry, ship and deck, bridge or overhead, boom, tower, and mobile or truck.
Before operating the crane, operators should cautiously read and understand the operation manual from the crane manufacturer. Further, they should always note any instructions given by a dependable instructor or operator. It is also essential for the crane operator to understand the consequences of careless operation of cranes. They should be instructed of the correct use, prohibition and the safety rules and regulation throughout the operation.
It is always the responsibility of the owner to make their personnel conscious of all federal rules and codes so as to preclude violations along with their penalties. Employers must also make particular that their operators are properly trained and are equipped with the know-how. To be safe in the operation of crane, it requires ability and exercise of fantastic care and ideal foresight, alertness and concentration. Also strict adherence to confirmed security rules and practices is essential.
The personnel who deal with the operation of cranes in an area must make use of hand signals, if essential, as their indicates of communication. Here are the most commonly used hand signals throughout crane lifting operation:
1. HOIST. Raise the forearm vertically and extend the correct arm straight out with forefinger pointing up. Then, move hand in small horizontal circle.
2. Lower. Forefinger pointing down and extend correct arm downward then move hand in small horizontal circle.
3. Quit. Extend right arm down with wrist bent, palm down and open.
4 SWING. Correct arm away from body, point with finger in direction of swing of boom.
5. RAISE BOOM. Fingers closed and thumb pointing upward while extending the right arm straight out.
6. Lower BOOM. Fingers closed and thumb pointing downward while extending the right arm straight out.
7. BRIDGE TRAVEL. Extend the right arm forward, hand open and slightly raised and make pushing motion in direction of travel.
eight. TROLLEY TRAVEL. Thumb pointing in direction of motion with palm up and fingers closed, jerk hand horizontally.
9. EMERGENCY Stop. Extend correct arm, palm down and move hand rapidly left and right.
10. Numerous TROLLEYS. For block marked 1. hold up one finger, and two fingers for block marked 2. Regular signals come subsequent.
11. RAISE BOOM and Reduce LOAD. Right arm extended and thumb pointing up. Flex fingers in and out as long as load movement is required.
12. Lower BOOM and RAISE LOAD. Right arm extended and thumb pointing down. Flex fingers pointing in and out as lengthy as load movement is required.
13. DOG Everything. Hold hands in front of the body.
14. MOVE Slowly. One hand gives any motion signal while the other hand motionless in front of hand providing the motion signal.
15. MAGNET IS DISCONNECTED. Spread each hands.
When using these hand signals be certain that you and the crane operator are familiar with these signals. A wrong signal could trigger a serious injury or worst - death.
Always remain alert when you are working in construction near any crane. If feasible, steer clear of working below a moving load and remain clear of the counter balance. Always use your security devices and helmet to avoid injuries. Below is a lot more info on this subject rigger and signalman