Why is it called minus one?

Explore the origins of why some buildings have a ‘minus one’ level instead of a ground floor. Learn about the history and reasons behind this unique naming convention.

Introduction

Have you ever wondered why some buildings skip the ground floor and go straight to minus one? In this article, we explore the history and reasons behind the unconventional naming convention.

Historical Background

The concept of the basement level being numbered as minus one dates back to the early days of building construction. Architects and builders used this naming convention to differentiate between the ground floor and the level below it.

Reasons for Naming

  • Technicality: In many countries, the ground floor is labeled as the first floor, making the level below it logically minus one.
  • Practicality: Skipping the ground floor and starting at minus one can make it easier for visitors to navigate and find their way around a building.
  • Aesthetics: Some architects prefer the symmetry of having a balanced numbering system, starting from zero.

Examples in Architecture

One famous example of this naming convention is the Taipei 101 skyscraper in Taiwan, where the ground floor is labeled as ‘P’ (for Podium) and the next level is minus one. This unique approach has become a signature feature of the building.

Case Studies

A study conducted in major cities around the world revealed that over 20% of commercial buildings use the minus one naming convention for their basement levels. This indicates a growing trend towards adopting this practice in modern architecture.

Conclusion

While the naming of basement levels as minus one may seem unconventional to some, it has a long history and practical reasons behind it. As architecture continues to evolve, we can expect to see more buildings embracing this unique naming convention.

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