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A gyppo or gypo logger is a logger who runs or works for a small-scale logging operation that is independent from an established sawmill or lumber company. The gyppo system is one of two main patterns of historical organization of logging labor in the Pacific Northwest United States, the other being the "company logger".
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.
The first two Lombard log haulers were used near Eustis, Maine, in 1901 prior to construction of the Eustis Railroad. These early machines had an upright boiler and were steered by a team of horses. [3] Most of the Lombard log haulers were used in Maine and New Hampshire. A few were used in Michigan, Wisconsin and Russia.
The concrete block manufacturer thrived in the rapidly growing post-World War II economy, manufacturing as many as 1,000 concrete blocks each day. By 1951, West Allis Concrete Products was receiving high-quantity orders to supply concrete block for Milwaukee County Stadium , Wisconsin State Fair Park , and Kohl's Department Stores , as well as ...
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Log drivers at Klarälven in Sweden. Log driving is a means of moving logs (sawn tree trunks) from a forest to sawmills and pulp mills downstream using the current of a river. It was the main transportation method of the early logging industry in Europe and North America. [1]
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Crosshole sonic logging (CSL) is a method to determine the structural integrity of drilled shafts and other concrete piles. The CSL method is considered to be more accurate than sonic echo testing in the determination of structural soundness of concrete within the drilled shaft inside of the rebar cage. This method provides little indication of ...