Factors Affecting Stability

• There are several factors that can affect the stability of a  MEWP, they include:
• Load
• Position of the Load
• Ground Conditions
• Tire Conditions
• Inertia
• Wind
• Accumulation Affect – When two or more of these factors occur at the  same time their effects accumulate, leading to a greater possibility of the  MEWP tipping over

Load

• A maximum capacity load can move the center of gravity closer to the  outside of the wheelbase.

Position of the Load

• Where in the platform the load sits can affect the center of gravity of the  machine. Loads should be evenly distributed on the platform floor.

Ground Conditions

• The terrain may be uneven or the ground may be too soft to bear the load  of the MEWP. The slope, grade, and firmness of the work area will have an  impact of the stability of the machine. Ground conditions are subject to  sudden changes.

Tire Conditions

• The proper air pressure in all 4 wheels is necessary to help keep the  machine stable. Never operate the machine with improperly inflated tires.

Inertia

• Avoid making sudden starts/stops when operating a MEWP. The sudden  movement can lead to a tip over of the machine if the MEWP is in its least  stable configuration. Hard starts/stops and sharp turns should be avoided

Wind

• Winds can quickly affect the stability of the machine as the forces  generated can create a wind-sail effect.
• Do not operate the machine when wind conditions exceed 28mph (12.5 m/s).

Traversing Grades

• Never drive a MEWP up or down a grade that exceeds the  maximum travel grade specification found in the Operation  and Safety Manual for the MEWP.

Traversing Slopes

• Never drive a MEWP across a side slope that exceeds the  maximum travel slope specification found in the Operation  and Safety Manual for the MEWP.