Are locking pins needed on hand loaded racking?
As a standard, pallet racking beams should be fitted with locking pins.
This is where fork lift trucks or other mechanical aisle equipment are operating. The general purpose of the locking pin is to stop beams being accidentally dislodged by the fork lift truck.
Following this logic any picking levels within a pallet racking installation accessed by fork lift trucks should have locking pins even if those levels are not used for pallets.
If all the racking or long span shelving is being used and there is no risk of a fork truck dislodging a beam then locking pins are really an optional extra.