This International Standard specifies the basic tests to verify the stability of rough terrain lift trucks and rough terrain variable reach trucks.

It is applicable to the above trucks:

• with a seated operator;
• fitted with fork arms or attachments;
• with fixed or articulated chassis;
• which may have stabilizers, axle-locking or frame-levelling devices;
• with two- or four-wheel or articulated steering systems;
• with masts with or without tilt mechanisms;
• with non-slewing booms or having slewing movement not greater than 5° either side of the longitudinal centre-plane.

This International Standard is not applicable to trucks when handling suspended loads which may swing freely.