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Earthing systems. v. t. e. In an electrical power distribution system, a ring main unit ( RMU) is a factory assembled, metal enclosed set of switchgear used at the load connection points of a ring-type distribution network. It includes in one unit two switches that can connect the load to either or both main conductors, and a fusible switch or ...
t. e. In electricity supply design, a ring circuit is an electrical wiring technique in which sockets and the distribution point are connected in a ring. It is contrasted with the usual radial circuit, in which sockets and the distribution point are connected in a line with the distribution point at one end. Ring circuits are also known as ring ...
In modern buildings, flashing is intended to decrease water penetration at objects such as chimneys, vent pipes, walls, windows and door openings to make buildings more durable and to reduce indoor mold problems. Metal flashing materials include lead, aluminium, copper, [1] stainless steel, zinc alloy, and other materials.
Building information model of a mechanical room developed from lidar data. Building information modeling ( BIM) is a process involving the generation and management of digital representations of the physical and functional characteristics of buildings and other physical assets. BIM is supported by various tools, technologies and contracts.
Repointing is the process of renewing the pointing, which is the external part of mortar joints, in masonry construction. Over time, weathering and decay cause voids in the joints between masonry units, usually in bricks, allowing the undesirable entrance of water. Water entering through these voids can cause significant damage through frost ...
Time and materials ( T&M) is a standard phrase in a contract for construction, product development or any other piece of work in which the employer agrees to pay the contractor based upon the time spent by the contractor's employees and subcontractors employees to perform the work, and for materials used in the construction (plus the contractor ...
Construction management ( CM) aims to control the quality of a project's scope, time, and cost (sometimes referred to as a project management triangle or "triple constraints") to maximize the project owner's satisfaction. [1] [2] It uses project management techniques and software to oversee the planning, design, construction and closeout of a ...
In 1963, on the new track, test runs hit a top speed of 256 km/h (159 mph). Five years after the beginning of the construction work, in October 1964, just in time for the Olympic Games, the first modern high-speed rail, the Tōkaidō Shinkansen, was opened between the two cities; a 510 km (320 mi) stretch between Tokyo and Ōsaka.