Forklift Capacity Plate
A forklift capacity plate is the manufacturer-installed data plate that states the truck’s rated lifting capacity and the load center it applies to, so the operator knows the maximum load the lift truck can safely raise, lower, and move in that configuration. The capacity rating is based on both weight and load centre.
On a manufacturing or shop floor, the capacity plate is used before every lift to verify that the planned load, pallet geometry, attachment, and lift height are within the truck’s actual rated capacity for that setup. It is typically mounted where the operator can see it, and it should remain legible and attached. If it is missing or unreadable, the truck should be removed from service until the plate is replaced. Capacity is not a single number; it changes with load center, mast height, and attachments. OSHA requires powered industrial trucks to be marked with capacity information, and WorkSafeBC guidance emphasizes the data plate as the source of the lift truck’s capacity rating.
- Ignoring load center changes: A load that is under the rated weight can still be unsafe if its center of gravity is farther out than the plate’s specified load center, because the actual capacity drops as the load center increases.
- Using the truck with a missing or illegible plate: The plate must be legible and attached; operating without it prevents the operator from verifying safe limits and is treated as a serious compliance issue.
- Failing to account for attachments or configuration changes: Fork extensions, clamps, side shifters, and other attachments can reduce capacity, so the capacity plate must match the truck’s current configuration and rating conditions.
What two variables define forklift capacity on the plate?
The rated load weight and the load center distance.
Why can’t you rely only on the gross weight of the load?
Because forklift stability depends on the moment created by the load’s center of gravity relative to the fork face, not weight alone; a longer or uneven load can exceed the rated moment even if the weight seems acceptable.
What happens when an attachment is installed?
The effective capacity usually changes, and the plate must reflect the attachment configuration or the truck’s residual capacity under that setup.