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The foot of a Bermuda sail may be attached to the boom along its length, or in some modern rigs the sail is attached to the boom only at its ends. This modern variation of a Bermuda mainsail is known as a loose-footed main. In some early Bermudian vessels, the mainsails were attached only to the mast and deck, lacking booms.
A Chicago boom derrick is a derrick with a boom which is attached to an external structure. The external upright member of the structure serves as the mast, and the boom is stepped in a fixed socket clamped to the upright. The boom is connected to at least three pulley systems to control the position of the boom.
Replacing an advertising poster in London using an aerial work platform. An aerial work platform (AWP), also an aerial device, aerial lift, boom lift, bucket truck, cherry picker, elevating work platform (EWP), mobile elevating work platform (MEWP), or scissor lift, is a mechanical device used to provide temporary access for people or equipment to inaccessible areas, usually at height.
Key: 1. Forestay 2. Shroud 3. (Spreaders) 4. Backstay 5. Inner forestay 6. Sidestay 7. (Boom) 8. Running backstays Bermuda rigged sloop at Convict Bay, Bermuda, circa 1879 Standing rigging on a square-rigged vessel. Running rigging on a sailing yacht: 1. Main sheet 2. Jib sheet 3. Boom vang 4. Downhaul 5. Jib halyard
There are models with lift heights ranging from 30 feet to 185 feet, the world's tallest self-propelled aerial work platform. JLG's QuikStik boom design delivers fast cycle speeds of 115 seconds from ground to elevation. In addition, JLG Ultra Series boom lifts come with the only oscillating axle in their boom class, providing enhanced mobility.
Kicking straps / boom vangs, which control a boom-footed sail's leech tension by exerting downward force mid-boom. Normally this is a system of highly geared blocks, of flexible stainless steel wire and low stretch cordage but recently some sail boats have a short spar instead, often of carbon fibre.
Interactive maps, databases and real-time graphics from The Huffington Post
Genie is an American company that manufactures work lifts and platforms used in construction, maintenance, warehouse stocking, and equipment installation. Founded in 1966 by Bud Bushnell, the company operated independently until acquired by Terex in 2002. [1]
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