If other barges hit its side, an ice effect or wave slam on the bow can generate an impact load. Side plates are usually under high shear, therefore, the sides have stiffeners to reduce the buckling effect. As per its function, there are workshop activity will be done on it, so it should have a special characteristics, as to be long enough to minimize the wave effect in pitch and surge response, to have a wide beam to minimize the rolling response due to wave, and deep enough to have adequate bending strength against hog, sag, and torsion, and in general to have an adequate freeboard for work shop activities.ĭue to the wave load, the deck plate should be sufficiently continuous to resist membrane compression, tension, and torsion stresses. The barge is considered a floating workshop. Mohamed Abdallah El-Reedy Ph.D., in Offshore Structures (Second Edition), 2020 5.10.7 Barges While a cargo barge may be able to transport a 10,000 ton structure with low vertical centre of gravity and supported on a large number of points on the deck, it may only be able to transport a 6000 ton topsides module which has a relatively high centre of gravity and supported on fewer support points. Additional requirements need to be met in terms of their global strength, local deck and frame strengths and height of the cargo's centre of gravity. Vessel owners and operators publish data of their vessels in terms of deadweight which provides a broad indication of their carrying capacity. These barges can submerge up to 6–8 m above their decks. The Boa barges (nominal dimensions 400 ft × 100 ft), the AMT barges (nominal dimensions 470 ft × 120 ft) and the recently built Hyundai barges (nominal dimensions 460 ft × 120 ft) are examples of these submersible barges. These are towed barges equipped with stability casings aft and a ship-like bow structure and a bridge, sufficient to enable the submerging of the barge above its main deck. Heerema's H851 barge, which is nominally 850 ft long by 200 ft wide, is the largest barge available in the industry. These barges are equipped with ballasting systems in addition to skid beams and rocker arms at the stern to enable the launching of jackets. īarges of 450 ft and longer have been used for jacket launching.Some of these barges are used for launching shallow water jackets. These barges are ideal for transporting piles and bridges as they avoid the risk of immersion in water and wave slamming. Due to the deck space available on the barge, more than one structure can be transported onboard these barges. These barges are often equipped with a ballast system of their own. Medium size structures, in the region of 3000 Te have been transported on barges of this type. Most of these barges are not equipped with a ballast system of their own. They represent standard cargo barges used quite extensively in the offshore industry. They are used to transport small offshore modules, small jacket and piles, tendon sections for TLPs, containers for pile driving hammers, modules of drill rigs, etc. These are relatively small pontoon barges with no ballast systems of their own. These are small pontoons used for carrying small structures in sheltered inshore waters. īarges less than 200 ft in length and 50 ft wide.The typical barge sizes and their uses are:
Towed barges are classified not only by their length and width and also by their mode of utilisation (e.g.
0 kommentar(er)
