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What is BIM Classification?

Classification is the method used to categorize and organize the elements in a BIM model, known as BIM objects.

Purpose of Classification

BIM is a digital system for managing and organizing many different objects.

The purpose of classification is to ensure a consistent and uniform description of construction projects, as well as the effective management and searchability of information.

This means it helps in easily finding, integrating, and later using BIM objects without any issues. As a result, communication, data exchange, and coordination become more transparent and seamless.

The Role of Classification Systems

What can be achieved with proper classification?

  1. Consistency: Data becomes consistent and accurate, reducing errors and misunderstandings.
  2. Efficient searching and filtering: It becomes easier to find the necessary data.
  3. Better coordination and collaboration: Everyone uses the same system and logic.
  4. Automation and digitalization: It aids in automation and the integration of digital solutions.
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Classification makes building elements transparent and easy to query

Key Classification Systems

There are several international and national classification systems, each following different standards and rules. Some notable systems include:

  1. Uniclass 2015: A unified classification system covering all construction industry sectors in the UK.
  2. OmniClass: Also known as OCCS, a North American standard that follows the international framework set by ISO 12006-2.
  3. MasterFormat: A standard used in the United States and Canada for organizing specifications and other written information related to construction projects, developed by the Construction Specifications Institute (CSI) and Construction Specifications Canada (CSC).
  4. Uniformat: Another product of CSI and CSC, a standard for classifying construction specifications, cost estimating, and cost analysis in the U.S. and Canada.

In addition to the above, there are other national standards such as the Swedish CoClass, Danish CCS, Finnish TALO 2000, Norwegian NS 3451 & TFM, and many others.

Classification helps to understand the components that make up the Weinberg office building.
Classification helps to understand the components that make up the Weinberg office building.

Practical Applications and Challenges

The practical application of BIM classification comes with several challenges, such as:

  • Differences between standards: Different countries and regions may use different standards, which can create significant difficulties in international projects – as mentioned above.
  • Updating and maintaining data: Since BIM models are constantly evolving, updating and maintaining classification data is a challenge.
  • Managing complexity: In large and complex projects, managing and applying classification systems is a complicated task in itself.

The importance of classification is growing: construction projects are becoming more complex, often requiring international coordination, and the projects themselves are generating more data. As technology advances and spreads, we increasingly rely on this data, whether for process automation or decision-making.

Overall, classification plays a key role in BIM, as it ensures the standardization and organization of data, which is essential for effective project management and communication.

Csaba Melovics

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