Forklift Attachments & Rated Capacity

A forklift's capacity is not a fixed number. Every attachment moves the load farther forward and adds weight, so the truck can safely lift less. Using an attachment without the right data plate is a common cause of tip-overs.

• Forklift Operators
• Warehouse
• Construction

Common attachments

• Fork extensions (sleeves): lengthen the forks for long loads.
• Side shifters: slide the load left and right without moving the truck.
• Clamps for cartons, drums, rolls or appliances.
• Rotators to dump or turn containers.
• Booms, jibs and hooks for lifting with slings. See Rigging Basics.
• Push-pull and slip-sheet attachments.

Why capacity changes

• Capacity is rated at a specific load center, often 24 inches from the fork face. A longer or offset load moves the center away from the truck and reduces what the truck can lift.
• An attachment adds its own weight to the front of the truck.
• Higher lifts reduce capacity further, and some trucks have different ratings at different heights.

The data plate

• OSHA requires that a forklift's nameplate show capacity, and that attachments carry their own plates. When an attachment is added, the truck must be marked to show the new capacity (1910.178(a)(5)).
• Do not change, add or remove parts that affect capacity or stability without written approval from the manufacturer.
• If the plate is missing, damaged or does not match the truck's setup, do not use the truck.

Operator checklist

• I read the data plate for the truck and the attachment
• The load weight and center are within the combined rating at the height I will lift
• The attachment is locked in place and in good condition
• I inspected hoses, clamps and pins on the attachment
• I drive with the load low, travel slowly and tilt back as needed
• I was trained for this attachment

Last updated: October 8, 2026