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CBC Jarvis Street Tower
The CBC Jarvis Street Tower was a 160 m (540 ft) free-standing lattice tower built in 1952 to provide radio transmission facilities to the city of Toronto, Ontario, Canada. It was the second tallest freestanding structure in Canada for several years and the second tallest freestanding lattice tower ever built in Canada after the Cambridge Bay LORAN Tower. In addition it was tallest structure in Toronto for 15 years until the completion of the TD Tower in 1967. Owned by the Canadian Broadcasting Corporation, the tower was located at 345 Jarvis Street in the Church and Wellesley neighbourhood of Toronto. The tower was used by CBC stations CBL-FM, CBLT and CBLFT, as well as CJRT and CICA-TV, until 1976, when almost all broadcast signals in Toronto moved to the CN Tower. The adjacent studio complex was used for CBC Toronto's radio and television operations, including CBL, which only used the studios at Jarvis Street, broadcasting from its transmitter at Hornby. After ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lattice Tower
A lattice tower or truss tower is a freestanding vertical framework tower. This construction is widely used in transmission towers carrying high voltage electric power lines, in radio masts and towers (a self-radiating tower or as a support for aerials) and in observation towers. Its advantage is good shear strength at a much lower weight than a tower of solid construction would have as well as lower wind resistance. In structural engineering the term ''lattice tower'' is used for a freestanding structure, while a ''lattice mast'' is a guyed mast supported by guy lines. Lattices of triangular (3-sided) cross-section are most common, particularly in North America. Square (4-sided) lattices are also widely used and are most common in Eurasia. Lattice towers are often designed as either a space frame or a hyperboloid structure. Before 1940, they were used as radio transmission towers especially for short and medium wave. Occasionally lattice towers consisting of wood were uti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CN Tower
The CN Tower (french: Tour CN) is a concrete communications and observation tower in downtown Toronto, Ontario, Canada. Built on the former Railway Lands, it was completed in 1976. Its name "CN" referred to Canadian National, the railway company that built the tower. Following the railway's decision to divest non-core freight railway assets prior to the company's privatization in 1995, it transferred the tower to the Canada Lands Company, a federal Crown corporation responsible for real estate development. The CN Tower held the record for the world's tallest free-standing structure for 32 years, from 1975 until 2007, when it was surpassed by the Burj Khalifa, and was the world's tallest tower until 2009 when it was surpassed by the Canton Tower. It is currently the ninth-tallest free-standing structure in the world and remains the tallest free-standing structure on land in the Western Hemisphere. In 1995, the CN Tower was declared one of the modern Seven Wonders of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Towers Completed In 1952
A tower is a tall structure, taller than it is wide, often by a significant factor. Towers are distinguished from masts by their lack of guy-wires and are therefore, along with tall buildings, self-supporting structures. Towers are specifically distinguished from buildings in that they are built not to be habitable but to serve other functions using the height of the tower. For example, the height of a clock tower improves the visibility of the clock, and the height of a tower in a fortified building such as a castle increases the visibility of the surroundings for defensive purposes. Towers may also be built for observation, leisure, or telecommunication purposes. A tower can stand alone or be supported by adjacent buildings, or it may be a feature on top of a larger structure or building. Etymology Old English ''torr'' is from Latin ''turris'' via Old French ''tor''. The Latin term together with Greek τύρσις was loaned from a pre-Indo-European Mediterranean langua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transmitter Sites In Canada
In electronics and telecommunications, a radio transmitter or just transmitter is an electronic device which produces radio waves with an antenna. The transmitter itself generates a radio frequency alternating current, which is applied to the antenna. When excited by this alternating current, the antenna radiates radio waves. Transmitters are necessary component parts of all electronic devices that communicate by radio, such as radio and television broadcasting stations, cell phones, walkie-talkies, wireless computer networks, Bluetooth enabled devices, garage door openers, two-way radios in aircraft, ships, spacecraft, radar sets and navigational beacons. The term ''transmitter'' is usually limited to equipment that generates radio waves for communication purposes; or radiolocation, such as radar and navigational transmitters. Generators of radio waves for heating or industrial purposes, such as microwave ovens or diathermy equipment, are not usually called transmitter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buildings And Structures Demolished In 2002
A building, or edifice, is an enclosed structure with a roof and walls standing more or less permanently in one place, such as a house or factory (although there's also portable buildings). Buildings come in a variety of sizes, shapes, and functions, and have been adapted throughout history for a wide number of factors, from building materials available, to weather conditions, land prices, ground conditions, specific uses, prestige, and aesthetic reasons. To better understand the term ''building'' compare the list of nonbuilding structures. Buildings serve several societal needs – primarily as shelter from weather, security, living space, privacy, to store belongings, and to comfortably live and work. A building as a shelter represents a physical division of the human habitat (a place of comfort and safety) and the ''outside'' (a place that at times may be harsh and harmful). Ever since the first cave paintings, buildings have also become objects or canvasses of much artistic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Demolished Buildings And Structures In Toronto
Demolition (also known as razing, cartage, and wrecking) is the science and engineering in safely and efficiently tearing down of buildings and other artificial structures. Demolition contrasts with deconstruction, which involves taking a building apart while carefully preserving valuable elements for reuse purposes. For small buildings, such as houses, that are only two or three stories high, demolition is a rather simple process. The building is pulled down either manually or mechanically using large hydraulic equipment: elevated work platforms, cranes, excavators or bulldozers. Larger buildings may require the use of a wrecking ball, a heavy weight on a cable that is swung by a crane into the side of the buildings. Wrecking balls are especially effective against masonry, but are less easily controlled and often less efficient than other methods. Newer methods may use rotational hydraulic shears and silenced rock-breakers attached to excavators to cut or break through woo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Former Radio Masts And Towers
A former is an object, such as a template, gauge or cutting die, which is used to form something such as a boat's hull. Typically, a former gives shape to a structure that may have complex curvature. A former may become an integral part of the finished structure, as in an aircraft fuselage, or it may be removable, being using in the construction process and then discarded or re-used. Aircraft formers Formers are used in the construction of aircraft fuselage, of which a typical fuselage has a series from the nose to the empennage, typically perpendicular to the longitudinal axis of the aircraft. The primary purpose of formers is to establish the shape of the fuselage and reduce the column length of stringers to prevent instability. Formers are typically attached to longerons, which support the skin of the aircraft. The "former-and-longeron" technique (also called stations and stringers) was adopted from boat construction, and was typical of light aircraft built until the adv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aircraft Warning Lights
Aviation obstruction lighting is used to enhance the visibility of structures or fixed obstacles which may conflict with the safe navigation of aircraft. Obstruction lighting is commonly installed on towers, buildings, and even fences located in areas where aircraft may be operating at low altitudes. In certain areas, some aviation regulators mandate the installation, operation, color, and/or status notification of obstruction lighting. For maximum visibility and collision-avoidance, these lighting systems commonly employ one or more high-intensity strobe or LED devices which can be seen by pilots from many miles away from the obstruction. Lamp types The lights generally come in two forms: * Red lamps that are either constantly illuminated or turn on and off slowly in a cycle of a few seconds. * White xenon flash lamps. Both types were in use in the United Kingdom until recently. New regulations stipulate the use of red lamps at nighttime only. Xenon flashers are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canadian Broadcasting Centre
The Canadian Broadcasting Centre, also known as the CBC Toronto Broadcast Centre, is an office and studio complex located in Toronto, Ontario, Canada. It serves as the main broadcast and master control point for the Canadian Broadcasting Corporation's English-language television and radio services. It also contains studios for local and regional French-language productions and is the headquarters of the North American Broadcasters Association. The analogous facility for CBC's French language services is Maison Radio-Canada in Montreal, while corporate headquarters are located at the CBC Ottawa Production Centre. The Canadian Broadcasting Centre is at 250 Front Street West in downtown Toronto, with additional entrances at 205 Wellington Street West and 25 John Street, directly across from the Metro Toronto Convention Centre. It is within walking distance of Union Station, the Rogers Centre, and the CN Tower and connected to the city's PATH underground walkway network. His ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Halton Hills
) , image_map = , mapsize = 200px , map_caption = , pushpin_map = CAN ON Halton#Canada Southern Ontario , pushpin_map_caption = , coordinates = , subdivision_type = Country , subdivision_name = Canada , subdivision_type1 = Province , subdivision_name1 = Ontario , subdivision_type2 = Region , subdivision_name2 = Halton , established_title = , established_date = , established_title2 = Incorporated , established_date2 = 1974 , leader_title = Mayor , leader_name = Ann Lawlor , leader_title1 = Federal riding , leader_name1 = Wellington—Halton Hills , leader_title2 = Prov. riding , leader_name2 = Wellington—Halton Hills , area_footnotes = , area_total_km2 = , area_land_km2 = 276.26 , area_urban_km2 = 39.52 , area_rural ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CBLA-FM
CBLA-FM (99.1 MHz) is a non-commercial Canadian radio station in Toronto, Ontario. Owned and operated by the Canadian Broadcasting Corporation, the station is the flagship station of the CBC Radio One network, broadcasting a mix of news and talk. In addition to the Toronto market, CBLA also reaches much of Central Ontario with a network of twelve rebroadcasters. The studios are in the Canadian Broadcasting Centre. CBLA-FM has an average effective radiated power (ERP) of 55,100 watts, peaking at 98,000 watts. The transmitter is atop First Canadian Place, at King and Bay Streets. It uses a directional antenna to avoid interference with stations in the U.S. Besides a standard analog transmission, CBLA streams its programming online. History CKGW and CBL CBLA's origins date back to March 5, 1928. That was the official sign on of CKGW at 910 AM, a commercial station owned by Gooderham and Worts, with studios at the King Edward Hotel. However, Gooderham & Worts had been ope ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TVOntario
TVO Media Education Group (often abbreviated as TVO and stylized on-air as tvo) is a publicly funded English-language educational television network and media organization serving the Canadian province of Ontario. It is operated by the Ontario Educational Communications Authority (OECA), a Crown corporation owned by the Government of Ontario. It operates flagship station CICA-DT (channel 19) in Toronto, which also relays programming across portions of Ontario through eight rebroadcast stations. All pay television (cable, satellite, IPTV) providers throughout Ontario are required to carry TVO on their basic tier, and programming can be streamed for free online within Canada. Governance, funding and other responsibilities TVO is governed by a volunteer board of directors, and supported by a network of regional councillors from across the province. TVO also reports to the Ontario legislature through the Minister of Education, in accordance with the Ontario Educational Commun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
