What MAC means
Manual Handling Assessment Charts, or MAC, is a tool developed by the British Health and Safety Executive to identify common manual handling risk factors. It has separate assessment routes for lifting and lowering loads, carrying them, and handling them with several people. Its practical value is showing where the task’s problems lie, as well as prioritising operations that need more urgent review.
Which factors are observed
The assessment considers weight and frequency, hand distance from the body, lifting height, trunk twisting, postural constraints, grip quality, floor conditions and the working environment. Carrying also involves the distance travelled. Team handling adds communication and coordination issues. The guide relevant to the operation should be used; entering only the load’s weight in kilograms is insufficient.
How to collect representative data
Normal work is observed and those performing it are consulted. Actual loads, product variation, route conditions and the most demanding periods should be recorded. If a task includes lifting and carrying, both parts are studied. The data should allow another person to understand the assessment and the team to repeat it after an improvement without inadvertently changing the comparison conditions.
How to use colours and scores
Colours identify factors that need attention and scores help prioritise tasks. HSE cautions that totals do not correspond to specific action levels. Results must therefore be interpreted alongside their contributing factors. An unfavourable placement height calls for a different response from a slippery floor or poor grip, even where the totals for two operations are similar.
When another analysis is needed
MAC is not designed for pushing and pulling, moving people or fully assessing repetitive upper-limb work. It also does not necessarily constitute a complete risk assessment. Individual characteristics and other factors not addressed by the tool must be considered. It is a UK technical resource: its legal references do not automatically translate into obligations in another country.
Hypothetical example
A dispatch area decides to review boxes lifted from a low pallet and carried to a table. The analysis separates the two operations. A positioner raises the starting point of the load and a layout change shortens the route. The revised task is then checked using representative loads and operator participation, also verifying that the aid creates neither trapping hazards nor congestion in the passage.
