Material Handling Glossary | O

# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Operator Compartment
The area within which the operator normally works. This area is a primary focus of ergonomic design and, in addition to allowing the operator and equipment to accomplish their assigned work, it must be designed to be safe, efficient, and comfortable. Also referred to as operator envelope.

Operator Down (Man Down)
Vehicle operation where carriage elevates and operator remains on ground during storage/retrieval process.

Operator Up (Man Up)
Vehicle operation where carriage and operator go up together during storage/retrieval process.

Order Picker
An order picker or orderpicker is defined as a person or a piece of equipment used to pick and deliver material needed for filling orders from storage. The machine known as an order picker is an electric lift truck specifically designed for filling individual customer orders which require piece-part or case picking, rather than full pallets or unit loads. Order pickers are used at elevations higher than the second level of racking in a warehouse or distribution center.

Overall Collapsed Height (OACH)
The maximum vertical dimension from the floor to the extreme top point of the mast with the fork carriage in the fully lowered position and unloaded.

Overall Length (OAL)
Length of fork truck extremities measured in direction of fork length.

Overall Width (OAW)
Width of fork truck extremities measured in direction of fork width.

The continued charge of a battery after it has been fully charged. This can damage the battery and severely reduce its service life; however, present-day automatic charger technology has greatly minimized the chances of overcharging industrial batteries.