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Operating lines are connected to sandbags (in a hemp system) or the top and bottom of arbors (in a counterweight system). Operating lines are typically 5 ⁄ 8 inch (16 mm) or 3 ⁄ 4 inch (19 mm) in diameter. Lift and operating lines were commonly made of manila hemp. The rope was often referred to simply as manila. Use of manila had a number ...
Pendants are made of wire rope with a diameter of 1, 1 + 1 ⁄ 4 or 1 + 3 ⁄ 8 inches (25, 32 or 35 mm). Each wire rope is made up of numerous strands twisted about an oiled hemp center core, which provides a "cushion" for each strand and also supplies cable
The original mill was destroyed by fire in 1920 [2] and rebuilt later the same year. [3] Rens Hemp Company closed in 1958. [4] Prior to its 1958 shutdown, Rens had been the primary provider of hemp rope for the United States Navy and was the last legal hemp producer in the United States following the World Wars [5]
Tarring rope aloft in the rigging of a sailing ship. Tarring is protecting some types of natural fibre and wire rope by coating it with tar. Hemp rope, which was typically used for standing rigging, requires tarring. Manila and cotton ropes were used for running rigging and were not tarred as this would make the rope too stiff to run easily ...
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Modern wire rope was invented by the German mining engineer Wilhelm Albert in the years between 1831 and 1834 for use in mining in the Harz Mountains in Clausthal, Lower Saxony, Germany. [3] [4] [5] It was quickly accepted because it proved superior strength from ropes made of hemp or of metal chains, such as had been used before. [6]
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