The CN Tower is a combination of the three structures. It is a shell, mass, and frame structure. It is a shell structure because the CN Tower is hollow. It is a frame structure because it has many levels to this structure. It is also a mass structure because the bottom part of this tower is mostly solid as it is poured concrete.
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The CN Tower is a communications and observation tower in Toronto, Ontario, Canada. Standing 553.3 metres (1,815 ft) tall, it was completed in 1976, becoming the world's tallest tower. [at the time]
It's now a common tourist attraction, visitors can go up it and have lunch or dinner in the spinning room up top.
The CN Tower is largely poured concrete.
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The CN Tower in Toronto Canada is a concrete observation structure mainly used for TV and radio broadcasting. It also contains a number of cell sites.
CN Tower
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Canada's highest structure is the CN Tower in Toronto.
I suspect you are thinking of the CN Tower. But the CN Tower is not the world's largest structure, never was, and doesn't even come close. It is tall, very tall, but quite thin. The CN Tower was (but is no longer) the world's tallest free-standing structure.
because it just is okay
The CN Tower in Toronto, Ontario.
Direct quote from the Wikipedia article on the structure... "...Its name "CN" originally referred to Canadian National, t he railway company that built the tower..."
CN Tower
The tallest free-standing structure in Canada is CN Tower, located in Toronto, Ontario. Currently used for observation, TV and radio transmission.
The CN Tower is largely poured concrete.