As with any other risk, if you can eliminate or avoid the manual handling, this is by far the best option. Consider whether mechanical handling aids could be used. This could range from a simple trolley to more sophisticated aids such as hoists and pulleys.
If you cannot eliminate or mechanize the manual handling tasks, you must carry out a risk assessment where the task could present a risk of injury. You need to look at ways to reduce the risks to as low a level as reasonably practicable.