06-16-2022, 09:46 AM
REACHING FOR THE SKY
Taken from : Ambuja Technical Literature Series -10
Concrete has been in use for centuries in various types of structures as its versatile properties and function have made it the most useful material in the construction industry the world over. It has always been preferred to other materials due to either economy, ease of construction and I or durability. Most major metropolitan centres I boast of towering slender beauties in concrete or steel which form permanent landmarks and are visible from several corners of the city.
The C N Tower is the world's tallest free-standing structure built since 1974, and singly provides facility adequate for all of Toronto's (Canada) radio and TV requirements. The tower has a height of 549m which includes about 102m high antenna mast.
From the top deck, at a height of 446.5m, on a clear day, one can view the landscape as far as a \00 miles. The record prior to 1974 was held by the 537m tall Ostankino Tower for radio and TV broadcasting built in Moscow in 1971. The famed Stuttgart Engineer, Dr. Fritz Leonhardt, designed the first reinforced concrete tower for TV and radio broadcasting transmission in 1955. This 217m concrete beauty, constructed using normal formwork, took 20 months to construct and was commissioned on February, 1956. The upper part of this tower has a basket-like casing for touristic and gastronomical
purposes, which made the television tower financially lucrative. The construction expenses of 4.2 million German Marks were recovered in merely five years, as the bold building, located on the hill, Hoher Bopser attracted thousands of visitors. Dr Leonhardt preferred a concrete needle to a 200m high iron gratting pole to be secured with wire ropes, which was a normal practice in those days. The idea could have struck as RCC chimneys were already being built to towering heights all over the world for environmental purposes. RCC chimney construction can be traced back to 1873.
With the developments in concrete technology, concrete admixtures and concrete construction equipment like slipforms, the construction of RCC chimneys became easier, faster and economical.
The sky is the limit when one has to decide the height of a chimney in a metropolitan city. The heights of chimneys have gradually increased due to a concern for environmental protection. Hence, the tallest RCC structure in India, the chimney for the 500 MW Unit 6 Thermal Power Station of the Tata Electric Company at Bombay, had to be 275m high. Between 1979 and 1988 this unit was the eleventh 500 MW Thermal Unit cleared for construction, and has the tallest chimney in the country.
Environmentalists have, quietly transferred their problems to civil engineers leaving it to them to design towers. One such tower has now become a permanent landmark on the eastern skyline of Bombay.
For more detail download ....
Taken from : Ambuja Technical Literature Series -10
Concrete has been in use for centuries in various types of structures as its versatile properties and function have made it the most useful material in the construction industry the world over. It has always been preferred to other materials due to either economy, ease of construction and I or durability. Most major metropolitan centres I boast of towering slender beauties in concrete or steel which form permanent landmarks and are visible from several corners of the city.
The C N Tower is the world's tallest free-standing structure built since 1974, and singly provides facility adequate for all of Toronto's (Canada) radio and TV requirements. The tower has a height of 549m which includes about 102m high antenna mast.
From the top deck, at a height of 446.5m, on a clear day, one can view the landscape as far as a \00 miles. The record prior to 1974 was held by the 537m tall Ostankino Tower for radio and TV broadcasting built in Moscow in 1971. The famed Stuttgart Engineer, Dr. Fritz Leonhardt, designed the first reinforced concrete tower for TV and radio broadcasting transmission in 1955. This 217m concrete beauty, constructed using normal formwork, took 20 months to construct and was commissioned on February, 1956. The upper part of this tower has a basket-like casing for touristic and gastronomical
purposes, which made the television tower financially lucrative. The construction expenses of 4.2 million German Marks were recovered in merely five years, as the bold building, located on the hill, Hoher Bopser attracted thousands of visitors. Dr Leonhardt preferred a concrete needle to a 200m high iron gratting pole to be secured with wire ropes, which was a normal practice in those days. The idea could have struck as RCC chimneys were already being built to towering heights all over the world for environmental purposes. RCC chimney construction can be traced back to 1873.
With the developments in concrete technology, concrete admixtures and concrete construction equipment like slipforms, the construction of RCC chimneys became easier, faster and economical.
The sky is the limit when one has to decide the height of a chimney in a metropolitan city. The heights of chimneys have gradually increased due to a concern for environmental protection. Hence, the tallest RCC structure in India, the chimney for the 500 MW Unit 6 Thermal Power Station of the Tata Electric Company at Bombay, had to be 275m high. Between 1979 and 1988 this unit was the eleventh 500 MW Thermal Unit cleared for construction, and has the tallest chimney in the country.
Environmentalists have, quietly transferred their problems to civil engineers leaving it to them to design towers. One such tower has now become a permanent landmark on the eastern skyline of Bombay.
For more detail download ....
