Stability

In this context, stability means the „resistance to toppling‟. An object with a narrow base and a high centre of gravity will need less force to topple it than one with a wide base and a low centre of gravity.

As the height of the centre of gravity increases relative to the width of the base, a point will be reached where the object will fall over unless it is supported by external means. At this point, the object is regarded as being unstable and the greater the support required the more unstable it is. A similar situation exists with a suspended load. Forces which try to topple the load will inevitably be present (e.g. wind, acceleration, braking).

It is essential, therefore, when slinging a load to ensure that it is sufficiently stable to resist these toppling forces. A load will be inherently stable if the lifting tackle is attached ABOVE the centre of gravity and properly disposed around it.

On some occasions, particularly when using a single leg sling, it may be necessary to lift a load such as a pipe or drum with the sling positioned a short distance away from the centre of gravity. When lifted the load will then take a tilted position but will still be inherently safe.

Where it is intended to „turn over‟ the load when in the air or position it at an inclined attitude, special consideration should be given to the question of balance and stability to ensure that at all stages of the operation the load remains balanced, stable and securely attached without overloading any item of lifting equipment.