Manually installing large windows and sheet materials requires workers to handle heavy and bulky objects.  You may need to lift and carry them some distance to the installation site.  When installing them, you may have to use a lot of strength to hold them while they are placed and secured.

Manual handling may lead to cuts or lacerations of the hands from sharp edges.  Where materials are being handled at elevation, they can catch the wind and initiate falls, or fall on other workers and injure them. 

The photo below on the left shows the problem, while the photo on the right illustrates the solution.

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Quality of Evidence

• Safety and health experts believe there is a risk reduction.

Manual handling of windows and flat panels becomes increasingly awkward and difficult as their size and weight increases.  Using vacuum or suction systems reduces hazards and fatigue.  Mechanical systems that position and hold the window or panel in place while it is secured result in even greater improvements.

Large window units and other panels can be installed without the usual physical stress that comes with lifting, carrying, holding, and positioning heavy objects. Using lifters will help reduce the possibility that a worker will develop a muscle or joint injury.

A vacuum lifter also keeps the fingers and arms from being caught in pinch points when positioning and setting the window or panel.

There should be a gain in productivity, since workers will be less fatigued and able to install more windows or panels. There may also be less damage to windows and other materials.

Quality of Evidence

• Manufacturers or vendors have reported an increase in productivity.
• Safety and health experts believe there is an increase in productivity.

Improved lifting mechanics or mechanical lifting and positioning aides can improve productivity of crews handling windows or panels and reduce fatigue and injuries.  Equipment costs, operating skills, and number of task repetitions must be considered.

Equipment like that described here may be available from local retailers or rental companies.

Approximate Cost

Manually-operated "hand-cup" frames featuring rotation and tilt cost around $1,200. You will spend about $300 total for four 9-inch pump-style vacuum cups to use with them.

A basic four-cup DC-powered lifter costs around $2,500.  Below-the-hook vacuum lifters are available with various options and configurations, ranging from $3,000 - 7,000.