Reach Truck Stability Explained
Understand centre of gravity, overturning moment, raised loads, turning, braking and floor effects in reach truck stability.
The combined centre of gravity
The truck and load act as a combined system. Adding a load moves the combined centre of gravity. Raising or extending it increases sensitivity to movement and reduces the margin for error.
Why turning matters
Turning creates lateral forces. Speed, turn radius and load height influence these forces, which is why operators must slow before turning and avoid steering abruptly.
Longitudinal stability
A load that is too heavy or too far forward increases forward overturning moment. The capacity plate controls this risk under specified conditions.
Floor and slope effects
Crossing debris, potholes or gradients can shift the truck and load. Reach trucks are usually designed for level indoor floors; ramps or slopes require explicit manufacturer and site controls.
What to do in an instability event
Follow the manufacturer’s emergency guidance and training. The operator should use the restraint system and should not improvise an escape response while the truck is moving or unstable.
Frequently asked questions
Does lowering the load improve stability?
Generally yes, which is why loads are kept at the approved travel height, but lowering does not make an overloaded truck safe.
Can counterweights be added?
Never modify counterweights or truck configuration without manufacturer or competent engineering approval.
Why avoid diagonal travel on slopes?
Side slope can reduce lateral stability. Follow manufacturer and site rules for any permitted gradient.
Related reach truck guides
Official Singapore references
These sources support the general WSH duties and forklift-safety principles discussed in this guide.
Need practical reach truck training?
Build operator competence through structured theory, supervised practice and practical assessment.
View the Operate Reach Truck Course Read the course FAQ