Page 200 - IGC BOOK

Factors that might lead to a mobile crane to collapse include:

• Exceeding the operating capacity or
operating radii.
• Operating on uneven ground condition.

• Fail to extend the outriggers.
• Operating in adverse weather condition
such as rain or high wind.
• Structural failure due to wear and tear or
load bearing parts being damaged.

Precautions and Procedures

General requirements for Cranes

• Lifting operation must be carefully planned and supervised by competent person.
• Ground condition must be capable of bearing the load.

• Site crane on even and rigid ground level.
• Outriggers must be fully extended.

• Select the crane which is suitable for the task – capable of bearing the load capacity.
• Lifting equipment should have adequate strength and stability for load.

• SWL – safe working load must be clearly marked on the crane and on accessories.
• People are not allowed to lift without authorisation.

Requirements for Safe lifting Operations

Planning and Preparation

• First step is to identify the risks involved by carrying out a risk assessment, draw up plan to
eliminate the or control the identified risks.
• check that the crane and any lifting accessories have a current thorough examination report.

• The crane operator must be trained and competent person.
• Select the crane suitable for the job, it will need to be able to lift the heaviest load at the
required radius.
• making sure a rated capacity indicator (automatic safe load indicator) is fitted
is in good working condition.

• selecting the most suitable lifting accessories (eg chains, slings, wire rope, hooks, spreader
beams etc) and method of slinging (choker sling, double wrap, cradle sling etc) relative to the
weight, shape, centre of gravity, lifting points and load stability.

ENSIGN | Unit IG2 – Element 6 – Musculoskeletal 24
Health