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Door breaching is a process used by military, police, or emergency services to force open closed or locked doors. A wide range of methods are available depending on the door's opening direction (inward or outward), construction materials, etc., and one or more of these methods may be used in any given situation.
Controlled Impact Rescue Tool, or CIRT, is a concrete breaching tool produced by Raytheon, that is capable of providing Urban Search & Rescue (USAR) teams with the ability to penetrate a reinforced concrete wall up to four times faster than traditional methods.
Within the construction field, different types of tampers can be used for different purposes, spaces, and materials. A jumping jack, or rammer, is a relatively small, hand-operated compactor. [1] It uses vibratory force, which is when mechanical force is used in addition to the machine's weight to compact the materials. The jumping jack is ...
A forcible entry tool for removing cylinder locks; used with a Halligan bar. Kelly tool A prying tool much like a Halligan tool without the right-angle pointed tip. Knox Box A box secured to the outside (esp. of a commercial occupancy) containing master keys, accessible by a high-security key available to responding firefighters.
A pneumatic jackhammer Video: A construction worker uses a jackhammer in Japan. A jackhammer (pneumatic drill or demolition hammer in British English) is a pneumatic or electro-mechanical tool that combines a hammer directly with a chisel. It was invented by William McReavy, who then sold the patent to Charles Brady King. [1]
Rock blasting during the construction of Interstate 70, 1967. The use of explosives in mining goes back to the year 1627, [3] when gunpowder was first used in place of mechanical tools in the Hungarian (now Slovak) town of Banská Štiavnica. The innovation spread quickly throughout Europe and the Americas.
The cable tool drilling machines developed by the early Chinese involved raising and dropping a heavy string of drilling tools to crush through rocks into diminutive fragments. [9] In addition, the Chinese also used a cutting head secured to bamboo rods to drill to depths of 915 m (3,002 ft). [ 10 ]
Heavy construction equipment is usually used due to the amounts of material to be moved — up to millions of cubic metres. Earthwork construction was revolutionized by the development of the scraper and other earth-moving machines such as the loader, the dump truck, the grader, the bulldozer, the backhoe, and the dragline excavator.