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The butt joint is the simplest joint. An unreinforced butt joint is also the weakest joint, as it provides a limited surface area for gluing and lacks any mechanical interlocking to resist external forces. [1] Nonetheless, it generally provides sufficient strength in most cases, particularly when fasteners are used.
Tusked joints were found in a well near Leipzig, [4] created by early Neolithic Linear Pottery culture, and used in construction of the wooden lining of the wells. [5] Mortise and tenon joints have also been found joining the wooden planks of the " Khufu ship ", [ 6 ] a 43.6 m (143 ft) long vessel sealed into a pit in the Giza pyramid complex ...
The first form of interlocking security is more mechanical. For example, if an individual is entering a building, there may be two sets of doors to enter from. As the individual enters the first door, that door will close before they enter through the second door. This type of interlocking security can prevent piggybacking or tailgating. The ...
Thread-locking fluid or threadlocker is a single-component adhesive, applied to the threads of fasteners such as screws and bolts to prevent loosening, leakage, and corrosion. Most thread-locking formulas are methacrylate -based and rely on the electrochemical activity of a metal substrate to cause polymerization of the fluid.
Control panel for a US&S relay interlocking. Entrance-Exit Interlocking (NX) was the original brand name of the first generation relay-based centralized traffic control (CTC) interlocking system introduced in 1936 by GRS [13] (represented in Europe by Metropolitan-Vickers). The advent of all electric interlocking technology allowed for more ...
Polyvinyl butyral (or PVB) is a resin mostly used for applications that require strong binding, optical clarity, adhesion to many surfaces, toughness and flexibility. It is prepared from polyvinyl alcohol by reaction with butyraldehyde. The major application is laminated safety glass for automobile windshields. [1]
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