{"id":24507,"date":"2024-01-20T16:11:02","date_gmt":"2024-01-21T00:11:02","guid":{"rendered":"https:\/\/essential.construction\/news\/unveiling-the-power-of-bim-clash-detection-for-optimal-project-outcomes\/"},"modified":"2024-01-20T16:11:04","modified_gmt":"2024-01-21T00:11:04","slug":"unveiling-the-power-of-bim-clash-detection-for-optimal-project-outcomes","status":"publish","type":"post","link":"https:\/\/essential.construction\/news\/unveiling-the-power-of-bim-clash-detection-for-optimal-project-outcomes\/","title":{"rendered":"Unveiling the Power of BIM Clash Detection for Optimal Project Outcomes"},"content":{"rendered":"

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Clash detection has a high return on investment in the design and construction process. A considerable amount of time and money will be saved if collisions in design models are registered and fixed early on. We\u2019ll look at clash detection, why it is essential, and how to do it efficiently with BIM technology.<\/strong><\/p>\n

Small things can have a significant impact in both a positive and negative way. For example, you can imagine the consequences if not every designer notices a structural designer\u2019s systematic 100-millimeter increase in the concrete beams\u2019 height of a building. In the worst-case scenario, the unnoticed change causes costly on-site rework, which already takes up 28% of project time (How We Build Now Report, 2023, by Censuswide).<\/p>\n

In the days of 2D drawings, it took a lot of scrutiny to detect potential clashes between designs. Overlaying drawings on a light box was a typical procedure. With three-dimensional BIM and models, we should have a better chance of identifying and avoiding conflicts. After all, designers can combine each other\u2019s models and immediately see if an MEP designer\u2019s pipe goes through a beam or if an architect\u2019s door does not have a corresponding opening in the load-bearing wall.<\/p>\n

However, the reality is not as perfect as it appears. That\u2019s why we need tools for BIM clash detection. They aim to ensure a model\u2019s building components have the correct quantities, dimensions, and positions.<\/p>\n

Detection of hard and soft clashes<\/h2>\n

The clear-cut way to think about clash detection concerns checking the geometrical properties of a model or a combination of models, a so-called federated model. A model can have internal clashes or conflicts with other models.<\/p>\n

A clash happens when two building components occupy the same space. They can be objects within objects or intersecting objects. These are called \u201chard clashes.\u201d Duplicate parts fall into this category as well.<\/p>\n

The other category of clashes is \u201csoft.\u201d They occur when a component is placed within another component\u2019s buffer zone. This could be a tolerance zone or, for example, a free service space required in front of an electrical cabinet.<\/p>\n

Speeding up clash detection<\/h2>\n

Typical clashes occur between structural and HVACE or architectural model objects. The number of HVACE installations is constantly growing. For example, a newly built Finnish hospital\u2019s BIM model contained around 40,000 structural objects, while it had 450,000 MEP objects. As a result, checking an HVAC against a structural model can initially have over a thousand clashes. Trying to go through that number manually is a daunting task. Even though some companies still rely on a fully manual model checking, the benefits of using specialized software for the job are overwhelming.<\/p>\n

Solibri<\/a>, the pioneering leader in model-checking software, allows designers, BIM managers, and BIM coordinators to audit individual and federated BIM models automatically. It offers default rules for checking model quality, and the users can customize or extend them to specific project needs or standards.<\/p>\n

Daan Arts, the innovation and digitalization manager at Hercuton<\/a>, told during a Solibri webinar<\/a> how he convinced their work preparation department\u2019s engineers to use the model checker:<\/p>\n

\u201cI just asked them, hey, what are you guys doing right now? What are you doing today? I\u2019m checking this and that. All right, so how long does that take for you? Well, it\u2019s going to take me about a day. Okay, let me show you how to do it using Solibri, and it\u2019ll take you about half an hour.\u201d<\/p>\n

An elemental part of BIM\u2019s success<\/h2>\n

Why do BIM models have clashes in the first place?<\/p>\n

There are many reasons, but the asynchronous design process is a fundamental issue. Due to pressing schedules and distributed responsibilities and contracts, working on the same federated model in real-time is still rare, though technically possible.<\/p>\n

Deficient communication is another culprit. Trying to communicate model changes manually is laborious, and keeping up with them is demanding.<\/p>\n

Every designer should do internal clash detection before sharing their models. That would radically reduce the number of clashes in the federated model.<\/p>\n

As BIM is becoming the backbone of all building-related information management, minimizing model-related errors programmatically is vital. Common Data Environments (CDEs) and BIM Communication Format, BCF, further enhance the checking process. Solibri\u2019s integration offers an easy way to access and synchronize project files from CDEs, such as BIM360, Trimble Connect, Catenda Hub (Bimsync), and Aconex.<\/p>\n

Going beyond clash detection<\/h2>\n

Clash detection is an essential function of Solibri, but it is just one part of the BIM quality assurance process. Model quality is also about design quality. This involves ensuring that the model is technically valid and that the design solution complies with the requirements.<\/p>\n

Other aspects of model checking include:<\/p>\n