OH-TYPE Crane

Nautical Structures manufactures overhead beam crane systems that are unique to each tender-handling application.

OH-Type HYDRAULIC OVERHEAD BEAM CRANES: Nautical Structures manufactures overhead beam crane systems specific and unique to each tender-handling application. The OH-Type Overhead beam Crane is a full-beam-width crane system that utilizes the full beam-width of the vessel to stow and support the cantilevered moment-load of the cranes. The beam-sections are supported with a series of wheel-sets and are typically transported outboard with a tensioned chain-drive system, or with a specialized linear-winch drive system. A contained hydraulic linear winch is installed into each end of the crane beam, providing service to both sides of the vessel. The winches incorporate a self-stowage feature that conceals the hook and weight assembly when the crane is stowed.

One of Nautical Structures’ most notable beam crane projects was an 8000-pound (3600-Kg) capacity full beam width system delivered to the Delta Marine 164-ft (50-m) M.Y. Triton. This aluminum overhead crane system integrated into the yacht’s composite superstructure, and launches the yacht’s tenders to both the starboard and port sides. One unique feature of this particular system is its designed capability to launch the tenders while the yacht is running underway at cruise speeds.
These cranes had to be engineered to not only handle the vertical hoisting loads, but also the side-loading imparted while the tender is being pulled through the water. A towing boom arrangement was developed to mitigate this potential, but the cranes had to be designed for the worst-case loading scenario nonetheless. Nautical Structures designs and builds Overhead Beam Cranes and Tender-Garage crane systems specific for new-build and refit projects, worldwide.

Currently Nautical Structures has several additional contracts in house for large overhead beam crane systems. A similar crane system to that delivered to Delta Marine; Trinity Yachts has elected to incorporate our 8800-pound (4000-Kg) SWL capacity crane system in their 234-foot (71-m) yacht (M.Y. Unbridled) delivered summer 2009. A smaller overhead beam crane system has been built and commissioned for a slightly smaller (164-ft/50-m) build M.Y. Blind Date at Trinity Yachts.