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Heavy Lift Capabilities

With a custom-built crane barge fleet, we stand alone as your best 360-degree answer to any heavy lift on the water. From flood gates to jacketed structures to 200'-pre-fabricated conveyor systems, we are your heavy lift source over water.

  1. The Manitowoc 4600 Series 3 is our flagship ringer crane–a nominal 600 ton machine with an unparalleled 360-degree load chart. This crane is pedestal mounted to a Manitowoc series 2 ring attachment and secured to a 6’ tall octagonal support structure on our SC720 spud barge. The barge is being retrofitted exclusively for this ringer crane to enable the strongest foundation possible. This crane is one of a kind and is the first of its kind to be barge-mounted. This machine is currently configured with 220' of main boom plus an additional 10' upper boom point extension for additional reach. This crane has an optional 130' fixed jib that can be added for a job-specific need giving us the unparalleled capability of 350' of boom over the water. This offering is unique to Stewart Construction and enables us to do jobs that our competitors cannot. We can reach higher and lift bigger loads than any of our competition. 
  2. The Manitowoc 4100 Series 3 is our newest heavy-lift ringer crane.  This 300 ton machine is mounted on a 74' x 260' x 12.5' spud barge which is fully founded for all heavy lift, pile driving, and framing work.  This barge was custom built for the largest structures and pilings being designed and installed on the lower Mississippi River.  This crane barge has increased stability and lifting capacity from other ringer cranes in its class.   
  3. The Manitowoc 4100 Series 3 is our third heavy-lift ringer crane. This 300 ton machine is mounted on a 70' x 195' x 10.5' spud barge which is fully founded for all heavy lift, pile driving, and framing work. The barge was custom built with the idea of lifting heavy loads in shallow waters. Most heavy lift machines are on deep draft barges that cannot get behind certain docks or in tight spots to make critical lifts. Our SC700 is a shallow draft vessel and allows us to get a 300-ton capacity rig into shallow waters. After Hurricane Katrina, we installed a pair of massive flood protection gates working in only 5' of water.
  4. The Manitowoc 4000W is our fourth heavy lift ringer crane. This is also a 300-ton machine that enables us to supplement our other machines and access hard-to-reach job sites. This crane does not have a tall mast, which enables us to get under overhead obstructions that other ringer cranes cannot.

Contact us today about your heavy lift needs.