tower crane with lifting boom

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• Crane (machine) — A modern crawler type derrick crane with outriggers. The latticed boom is fitted with a jib. A crane is a type of machine, generally equipped with a hoist, wire ropes or chains, and sheaves, that can be used both to lift and lower material …   Wikipedia

• National Commission for the Certification of Crane Operators — Type Professional Organization Founded 1995 Location Fairfax, VA (headquarters office) Key people John M. Kennedy, president …   Wikipedia

• Manitowoc Cranes — Type Public (NYSE: MTW Industry …   Wikipedia

• Eastern span replacement of the San Francisco — San Francisco – Oakland Bay Bridge (eastern span replacement) Artistic rendition of the new eastern span of the Bay Bridge seen from Treasure Island (ca. 2014) Official name To be determ …   Wikipedia

• Derrick — For other uses, see Derrick (disambiguation). Derrick of Ocean Star Offshore Oil Rig Museum, Galveston, Texas A derrick is a lifting device composed of one tower, or guyed mast such as a pole which is hinged freely at the bottom. It is controlled …   Wikipedia

• Counterweight — For the Outer Limits episode, see Counterweight (The Outer Limits). Simple Crane A counterweight is an equivalent counterbalancing weight that balances a load.[1] Contents …   Wikipedia

• technology, history of — Introduction       the development over time of systematic techniques for making and doing things. The term technology, a combination of the Greek technē, “art, craft,” with logos, “word, speech,” meant in Greece a discourse on the arts, both… …   Universalium

• derrick — /der ik/, n. 1. Mach. a jib crane having a boom hinged near the base of the mast so as to rotate about the mast, for moving a load toward or away from the mast by raising or lowering the boom. 2. Also called oil derrick. the towerlike framework… …   Universalium

• Excavator — CAT 325C, fitted with quick coupler and tilting bucketAn excavator is an engineering vehicle consisting of an articulated arm (boom, stick), bucket and cab mounted on a pivot (a rotating platform, like a Lazy Susan) atop an undercarriage with… …   Wikipedia

• literature — /lit euhr euh cheuhr, choor , li treuh /, n. 1. writings in which expression and form, in connection with ideas of permanent and universal interest, are characteristic or essential features, as poetry, novels, history, biography, and essays. 2.… …   Universalium

• Saipem 7000 — is the world s second largest Crane vessel (2 x 7,000t), after the Thialf (2 x 7,100t). The crane radius of the Saipem 7000 grants a lifting capability of 14000t at 42 meters while Thialf can lift 14200 at 31.2 meters. It is owned by the oil and… …   Wikipedia