This page contains a Flash digital edition of a book.
IT’S ALL ABOUT THE BY PETER DEVINE


ROPES


Versabar is a lift specialist company founded in 1981 in New Orleans, Louisiana. In 2010, the company launched the VB 10,000, an innovative heavy lift vessel with a rated lift capacity of 7,500 tons. Te largest salvage vessel ever built in the United States, the VB 10,000 has lifted over 80,000 tons.


Te VB 10,000 Heavy Lift System is an anomaly of modern construction. Although designed and engineered using the most common of maritime components – winches, barges, steel pipe, and wire rope – it is the innovative manner in which these components have been assembled that give the vessel its unique character. While the VB 10,000 and its associated lifting components have won numerous engineering and construction awards, it is the simplicity of the concept behind the vessel’s design that has made it such an effective and versatile heavy lifter. In deviating significantly from the template


of conventional mono-hulled derrick barges, the advantages of the VB 10000’s catamaran-style construction are easy to note: the use of two hulls coupled together with a patented pin system provides enhanced stability; the use of four main hoist winches/ blocks instead of one assures level lifting; and at 13,500 deadweight tons (less than half the size of vessels with comparable lift capacity) the vessel’s shallow 12.5-foot draft permits the VB 10,000 to work in rivers, bays, and other inland waterways inaccessible to deep-draft vessels. Yet for all its innovative design characteristics, the


real “secret” of VB-10K’s efficiency and versatility is the nearly 70,000 feet of wire rope spooled on the 28 winches it employs to get the work done. Each of the system’s 400-ton main hoist winches carries 7,500 feet of 3 ½” Bridon galvanized steel rope; the four 100-ton winches used to operate the massive jaws of “Te Claw,” a grappling device, carry 5,000 feet of 2” wire rope apiece; the eight 30-ton tieback winches are each equipped with 400 feet of 1 1/8th” rope, while the system’s four double-drum mooring winches carry


18 NOVEMBER–DECEMBER 2016 WIRE ROPE EXCHANGE


2,000 feet of 2” rope per drum. In addition to the wire rope, each of the system’s eight 40-ton barge-handling winches carries 500 feet of Samson-Turbo-75 synthetic line. Along with all of the above, the system carries over 1,000 feet of 2” Amsteel line for use in tying back the Claw and also to make up the vessel’s tow harness. Tat’s a lot of rope, and VB 10,000 personnel are skilled at making the most of it. Known initially for its ability to make single-piece


retrievals of sunken topsides, this heavy lift system has, in the years since its launch in 2010, expanded its performance envelope to include installations, decommissionings, jacket removals, jacket tows, and topplings/reefings. But to single out a project which best demonstrates the many uses of the VB-10K’s wire rope


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66  |  Page 67  |  Page 68  |  Page 69  |  Page 70  |  Page 71  |  Page 72  |  Page 73  |  Page 74  |  Page 75  |  Page 76  |  Page 77  |  Page 78  |  Page 79  |  Page 80  |  Page 81  |  Page 82  |  Page 83  |  Page 84