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It may be called a box hook, cargo hook, loading hook, docker's hook when used by longshoremen, and a baling hook, bale hook, or hay hook in the agricultural industry. Other variants exist, such as in forestry, for moving logs, and a type with a long shaft, used by city workers to remove manhole covers .
A manhole pick or hook is typically used to lift them, though other tools can be used as well, including electromagnets. Painted manhole cover in Osaka , Japan Although the covers are too large to be easily collectible , their ubiquity and the many patterns and descriptions printed on them has led some people to collect pictures of covers from ...
F/n = 23 kN per anchor during initial lift (n = 2 lifting anchors) Transport loads in the yard and on-site Suction due to casting bed adhesion is not considered, as the calculation takes into account the lifting device dynamic coefficient. S = (W x Ksl x Kd) / n = (64.8 x 1.16 x 1.2) / 2 = 45.1 kN load resistance required per anchor
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Manhole covers in Helsinki, Finland. Manhole closings are protected by a grating or manhole cover, a flat plug designed to prevent accidental or unauthorized access to the manhole. These covers are traditionally made of metal, [2] but may be constructed from precast concrete, glass reinforced plastic or other composite materials (especially ...
A manhole cover in downtown Detroit, at the corner of Congress and Bates, launched off the ground Friday afternoon, sending one to the hospital.
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