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2. Jib (crane) - Wikipedia

   en.wikipedia.org/wiki/Jib_(crane)

   A jib or jib arm is the horizontal or near-horizontal beam used in many types of crane to support the load clear of the main support. [1] [2] An archaic spelling is gib. [3] Usually jib arms are attached to a vertical mast or tower or sometimes to an inclined boom.

3. Eurocode 3: Design of steel structures - Wikipedia

   en.wikipedia.org/wiki/Eurocode_3:_Design_of...

   EN 1993-6 gives principles and application rules for the structural design of crane runaway beams and other crane supporting structures including columns and other member fabricated from steel. This part is intended to be used with Eurocode EN 1991-1 and it covers overhead crane runaways inside buildings and outdoor overhead crane runaways.

4. Accredited Crane Operator Certification - Wikipedia

   en.wikipedia.org/wiki/Accredited_Crane_Operator...

   1971 – OSHA passes 29 CFR 1926.550, which is the standard for cranes and derricks used in construction for the next 41 years. [3] 1995 – The National Commission for the Certification of Crane Operators (NCCCO) is established by the crane and lifting industry as a nonprofit organization to develop a certification program for crane operators.

5. Level luffing crane - Wikipedia

   en.wikipedia.org/wiki/Level_luffing_crane

   A level-luffing crane is a crane mechanism where the hook remains at the same level while luffing: moving the jib up and down, so as to move the hook inwards and outwards relative to the base. [1] Usually the description is only applied to those with a luffing jib that have some additional mechanism applied to keep the hook level when luffing.

6. Crane (machine) - Wikipedia

   en.wikipedia.org/wiki/Crane_(machine)

   The "hammerhead", or giant cantilever, crane is a fixed-jib crane consisting of a steel-braced tower on which revolves a large, horizontal, double cantilever; the forward part of this cantilever or jib carries the lifting trolley, the jib is extended backwards in order to form a support for the machinery and counterbalancing weight. In addition ...

7. Block-setting crane - Wikipedia

   en.wikipedia.org/wiki/Block-setting_crane

   Electric cranes, supplied by electricity from a single centralised generating station or prime mover, could offer a lot of power per crane, without requiring the high cost of an equivalent steam plant on each crane. Port cranes were almost all luffing jib cranes, often with a long reach. Their lifting capacity depended on how far they were ...