1 Scope
This European Standard specifies dynamic tests for the verification of lateral stability
for counterbalanced lift trucks according to EN ISO 3691‑1 that have a centre control, sit down, non-elevating operator, with a rated capacity
up to and including 5 000 kg when travelling on smooth level ground with the forks
in travelling position. The standard is not applicable for Rough Terrain forklift
trucks.
NOTE 1 Experience shows that counterbalanced lift trucks with a rated capacity over 5 000 kg are not significantly affected by lateral instability.
The requirements are specific to the various drive systems (e.g. Electric-/Internal-Combustion-Engine
trucks), taking account of their varying influence on dynamic stability performance.
This European Standard does not cover the risk of a lateral tip over associated with
driving backwards.
NOTE 2 Research has shown that driving backwards in typical working operations, such as unloading of a lorry, does not cause lateral instability. For this reason, only driving forward needs to be tested.
Risks due to falling off a loading dock or turning on a ramp are not covered by this
European Standard. Risks due to lifting or manoeuvring operations are covered by the
respective stability tests.