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A block and tackle [1] [2] or only tackle [3] is a system of two or more pulleys with a rope or cable threaded between them, usually used to lift heavy loads.. The pulleys are assembled to form blocks and then blocks are paired so that one is fixed and one moves with the load.
Lift slab construction (also called the Youtz-Slick Method) is a method of constructing concrete buildings by casting the floor or roof slab on top of the previous slab and then raising (jacking) the slab up with hydraulic jacks. This method of construction allows for a large portion of the work to be completed at ground level, negating the ...
A team of riggers design and install the lifting or rolling equipment needed to raise, roll, slide or lift objects such as heavy machinery, structural components, building materials, or large-scale fixtures with a crane, hoist or block and tackle. Rigging comes from rig, to set up or prepare.
A gin pole used to install a weather vane atop the 200-foot steeple of a church Roof trusses being assembled with gin poles. The gin pole is derived from a gyn, and considered a form of derrick, called a standing derrick or pole derrick, [2] distinguished from sheers (or shear legs) by having a single boom rather than a two-legged one.
The configuration (size, position and quantity) of this reinforcement should be supplemented to the element reinforcement design to ensure for adequate capacity of the lifting design. Lifting design is influenced by the steel / concrete interaction of the specific anchor selected. Different load cases are considered by the lifting design ...
Michael Brewer, one-half of the folk-rock duo Brewer & Shipley, has died. He was 80. On Tuesday, Dec. 17, Brewer's musical partner, Tom Shipley, confirmed the news of his death in a Facebook post ...
Ray Romano is reflecting on his kids' upbringing and the impact his fame may have had on it.. Sitting down with PEOPLE, the 66-year-old actor discusses the upcoming documentary Romano Twins, which ...
Cranberry Mimosa. Iowa, Kentucky, North Carolina, South Carolina, Virginia, Louisiana, Hawaii . Seven states seem to prefer a Christmas brunch drink for the holidays.