Cranes on Barges

A crane on a barge works from a floating base that moves with water, wind and load. Every lift changes the barge's angle, and the crane's capacity depends on that angle. Special rules and charts apply.

• Marine Construction
• Crane Operators
• Riggers

Why barges are different

• List (side tilt) and trim (front-to-back tilt) change with the load, and the crane's boom angle can reduce capacity. OSHA's crane rule requires that capacity be adjusted for list and trim (1926.1433).
• Waves, tides and wakes move the barge and make loads swing.
• The barge's buoyancy and stability are limited. A heavy lift over the side can reduce freeboard or tip the barge.
• Barge, crane and mooring are a combined system. A mistake in any part can cause a sinking or collapse.

Requirements and planning

• Use the crane manufacturer's load charts for floating cranes or a qualified person's approved charts for the specific barge and setup. See Load Charts
• Have a marine surveyor or naval architect confirm the barge's stability, deck strength and ballasting
• Fit an inclinometer that shows list and trim to the operator, and set limits for the lift
• Secure the crane to the barge and the load blocks with chocks, bolts or lashings
• Moor or spud the barge firmly. Check mooring lines and anchors as tide and current change
• Plan for weather: stop work in high wind, waves or lightning. See Lift Wind Limits
• Write a lift plan that covers the barge, the load, swing and the pickup and set locations. See Lift Planning

People on the barge

• Everyone working over or near water wears a lifejacket and has a way to get back on board. See Working Over Water.
• Keep a ring buoy, rescue boat and trained crew ready for a person overboard. See Water Rescue.
• Keep decks clear, non-slip and well lit. Use guardrails or fall protection where the deck edge is above water.
• Brief everyone on emergency signals, abandonment plans and where lifejackets are.

Last updated: October 8, 2026