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Tour CB21

Tour CB21 is a engineering topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Tour CB21 rather than just read about it. In short: Tour CB21, formerly Tour Gan, is an office skyscraper located in La Défense, the high-rise business district situated west of Paris, France. It was designed by celebrated American architect Max Abramovitz.

Tour CB21 — main illustration
Tour CB21 — illustration

Key takeaways

  • Tour CB21 belongs to engineering; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Tour CB21 to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Tour CB21 from memory before moving on to harder problems.

Reference excerpt

Tour CB21, formerly Tour Gan, is an office skyscraper located in La Défense, the high-rise business district situated west of Paris, France. It was designed by celebrated American architect Max Abramovitz.

History Built from 1972 to 1974, the tower is 179 m (587 ft) tall at roof height. However, it reaches 187 m (614 ft) once including the antenna located on the roof. It was the second tallest building in Paris upon its completion. Its ground shape is in the form of a Greek cross. In 1972, during construction, a protest campaign opposed the building of Tour Gan. Protesters demanded a reduction in height. However, the tower was completed at the planned height. Today, the main tenants are Suez Environnement and AIG France. The structure is owned by Fonciere des Regions.

See also Skyscraper La Défense List of tallest structures in Paris

External links Tour GAN (Emporis) CB21 Website (Covivio)

References

Illustrations

Tour CB21 illustration

Worked examples

Example 1 — a first encounter with Tour CB21

Start with the simplest possible case. Write down what Tour CB21 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Tour CB21 before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Tour CB21 ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Tour CB21

In research
Tour CB21 appears in engineering research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Tour CB21 in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Tour CB21 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Buildings and structures completed in 1974, Harrison & Abramovitz buildings, Office buildings completed in 1974, so understanding it makes those chapters shorter.
In everyday life
Look for Tour CB21 outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Tour CB21 in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Tour CB21 means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Tour CB21 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Tour CB21 in simple terms?

Tour CB21, formerly Tour Gan, is an office skyscraper located in La Défense, the high-rise business district situated west of Paris, France. It was designed by celebrated American architect Max Abramovitz.

Why does Tour CB21 matter?

Because it connects several engineering ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Tour CB21?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Tour CB21.

Tags

  • Buildings and structures completed in 1974
  • Harrison & Abramovitz buildings
  • Office buildings completed in 1974
  • Skyscraper office buildings in La Défense

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