Due to the inherent limitations of 2D drawings during the review process, important details such as the height, position, relationships with other interfaces, and spatial configuration of equipment are often overlooked or not visible. In 2D plans, contractors cannot fully verify the equipment layout solely through the drawings. Instead, they must rely heavily on experience and imagination to judge whether equipment conflicts with building interfaces, piping arrangements, or other related installations. It is impossible to confirm the appropriateness of these settings from the drawings alone, requiring verification through completion inspections to determine if modifications are necessary.
Today, let’s discuss the difference between BIM models and traditional 2D drawing reviews.
Equipment that frequently encounters issues — such as unclear confirmation in drawings, placement suitability, and spatial relationships between pipelines — highlights the limitations of 2D drawings and exposes potential problems. Characteristics of BIM include spatial information and visualized 3D graphics. BIM software is used as an auxiliary tool to enhance the review process, creating a more comprehensive workflow. This software assists with quantity and area calculations, equipment specification verification, conflict detection, and spatial configuration checks in three-dimensional space. Additionally, API development enables automated checks, such as verifying whether the horizontal distance between equipment meets regulatory requirements.
When calculating the number of equipment units per floor and the types of equipment, traditional review methods require manual counting and page-by-page verification. While software like AutoCAD offers some calculation functions, it lacks the ability to classify data by floor in detail. In contrast, BIM-assisted reviews leverage software tools to quickly generate detailed tables summarizing equipment counts for each floor.
In traditional reviews, judgments depend entirely on the reviewer, who manually measures distances—such as from any point to a sprinkler head—using the standards as guidelines. After measuring, the values must be converted according to the drawing scale. However, floor plans alone cannot confirm equipment height, and cross-sectional views necessary for this verification may not exist at the design stage. Such checks are deferred until the completion inspection.
By integrating BIM into the review process, API and software tools can greatly simplify these tasks. For example, selecting the sprinkler head and the relevant wall in the BIM model allows automated calculation of distances to verify compliance with regulations. The 3D model also enables reviewers to examine any section, using built-in measurement tools to confirm whether distances between sprinkler heads and device surfaces or floors meet requirements.
Traditional reviews determine required equipment quantities based on floor area but cannot verify height compliance until completion inspection. BIM-assisted reviews combine software-based quantity and area calculations with 3D graphical validation. The output report lists each floor’s area and the number of flow sensors, confirming whether they meet set standards. The exact height and placement of flow sensors can be checked against sectional views within the BIM model to ensure there are no conflicts with other pipelines.
In summary, this covers the difference between BIM models and traditional 2D drawing reviews. I hope this article provides useful insights for everyone!
>> Read more similar articles
Must log in before commenting!
Sign Up