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By 1963, a new structural system of framed tubes had appeared in skyscraper design and construction. Fazlur Rahman Khan, a structural engineer from Bangladesh (then called East Pakistan) who worked at Skidmore, Owings & Merrill, defined the framed tube structure as "a three dimensional space structure composed of three, four, or possibly more frames, braced frames, or shear walls, joined at or ...
One or more tube riders (often called "tubers") tether their tubes to a powered watercraft such as a motor boat or a personal watercraft. The riders are then towed through the water by the watercraft. In free floating tubing, the tube riders are untethered and often conveyed by the current of a waterway.
The term is used predominantly in the United States, or other countries which follow US construction or engineering terminology. HSS members can be circular, square, or rectangular sections, although other shapes such as elliptical are also available. HSS is only composed of structural steel per code.
Pipe assemblies are almost always constructed with the use of fittings such as elbows, tees, and so on, while tube may be formed or bent into custom configurations. For materials that are inflexible, cannot be formed, or where construction is governed by codes or standards, tube assemblies are also constructed with the use of tube fittings.
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Ride on power trowels range in size from 1.8 m (6 ft) machines weighing 270–320 kg (600–700 lb), up to 3.7 m (12 ft) machines weighing over 910 kg (2,000 lb). Power ranges from small 10 kW (13 hp) single cylinder engines, all the way up to 70 kW (100 hp) multi fuel V8 engines.
Tube riding at Teahupo'o . Tube riding is a term used by surfers to describe riding well inside the curve or barrel of a finely-shaped breaking wave. Under the right conditions, waves in some areas, such as the Banzai Pipeline in Hawaii, form a moving "tube" or cylinder as they break. The most straightforward way to tube ride is by body surfing ...
Poison Profits. A HuffPost / WNYC investigation into lead contamination in New York City