Last edited 30 Nov 2020

Building entities for BIM

Uniclass is a voluntary classification system for the construction industry that can be used for structuring project information, such as building information models (BIM). It was created in 1997 by the Construction Project Information committee (CPIC).

The Uniclass classifications, state that:

“In ISO 12006-2, Entities include buildings and grounds, and other large-scale independent constructions such as bridges, roads, canals, tunnels, towers and dams.”

ISO 12006-2 is the international standard: Building construction -- Organization of information about construction works -- Part 2: Framework for classification.

The most recent version of Uniclass, Uniclass 2015, (maintained and updated by the NBS) suggests that:

“Entities are discrete things like buildings, bridges, tunnels etc. They provide the areas where different activities occur.”

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