paddyB:

The following is in response to your original question:

These are the official U.S. guidelines. Note: (e), (f), (g). The Standards Australia AS B56-1964 or AS 2359.6 guidelines should be the same or similar.

ANSI/ITSDF B56.1-2005 (Reaffirmation of ASME B56.1-2004)

Safety Standard for Low Lift and High Lift Trucks, Powered and Non-powered Industrial Trucks

An American National Standard Institute (ANSI); Industrial Truck Standards Development Foundation (ITSDF) Standard:

"5.3 Traveling

5.3.22 The operation of high lift, rear entry end control,
narrow aisle, and reach trucks either loaded or
unloaded with a standup, nonelevating operator
requires special safety considerations as follows:
(a) An industrial truck may tip over if an operator
fails to slow down to a safe speed before making turns.
Indications that a truck is being driven at an excessive
speed during maneuvers include
(1) tire skidding
(2) truck side sway
(3) wheel lift
(b) The likelihood of lateral tipover is increased under
any of the following conditions, or combinations of them
(1) overloading
(2) traveling with the load or load handling mechanism
elevated
(3) braking or accelerating sharply while turning
(4) excessive tilt or off-center positioning of the load
(5) traveling on an uneven surface
(6) traveling at excessive speed
(7) turning on an incline or ramp
(c) Tipping forward can occur and its likelihood is
increased under the following conditions, or combination
of them
(1) overloading
(2) traveling with the load tilted or reached forward
and/or elevated
(3) hard braking while traveling forward
(4) sudden acceleration while traveling in reverse
(5) driving with the load down slope on a steep
incline or ramp
(6) hitting overhead obstacles or collisions with
other objects
(d) A dock type tipover can occur if a truck is steered
over the edge, or driven off a dock or ramp. They can
also occur if a highway truck or trailer rolls away from
the dock or is driven away during loading or unloading.

(e) These trucks are designed with open operator
compartments to permit easy ingress and egress.
Although there is no sure way in all circumstances to
avoid injury, where possible, in the event of an imminent
tipover or off the dock accident, the operator should
step off and away from the truck. These actions are
intended to reduce the risk of serious injury or death.

(f) For nontipover accidents such as an imminent collision
with other objects in the work environment, the
operator should utilize the protection provided by the
compartment by staying within its confines.

(g) Where the environment presents a severe hazard,
or there are unusual operating conditions, the user may
find it beneficial to establish different, or additional precautions
and special operating instructions appropriate
for those conditions."