We have few standards when it comes to lift trucks, but serial number plates are one of those items that are standard.
The term used on most lift trucks unless you get into the larger ones is a 24" load centre or, 24" to the centre of the load.
The serial number plate will usually state this plus, show any attachments on the truck and the truck's maximum fork height and.....the truck's capacity with the attachment(s) and the forks fully elevated.
There are just too many varibles to try and include all on a serial number plate.
Operators are to receive safety training and be made aware of how to read a serial number plate and the many varibles that can affect a truck's capacity.
They should be also told never to "assume". If they're not sure, check with their supervisor.
It is the employer's responsibility to provide a lift truck that has adequate capacity for the job and it's the employer's responsibility to train their drivers.
It's the operator's responsibility to apply their training to handle a load safely.
Garry