MEP coordination is one of the most important parts of the pre-construction phase of a building, and so it demands a lot of attention from all of the Architecture, Engineering and Construction (AEC) professionals involved in the project. The MEP coordination process is aimed at ensuring that the architectural design of the building doesn’t interfere with the layout of the mechanical, electrical, plumbing, or fire protection systems.

This is why, more often than not nowadays, Building Information Modelling (BIM) technology is being used by firms to help them to streamline their MEP coordination process. The typical stages involved in this process are:

Stage One: Review of consultant’s drawings and structural plans

This is the preliminary stage of the project, with the firm responsible for the MEP drafting (like The CAD Room) reviewing the single-line drawings or 3D models of the MEP system from the MEP contractors. We then analyse the architectural and structural plans in detail, making sure that not only are they consistent with the schematics but that the MEP coordination specifications are correct.

Stage Two: Create a 3D model

Using the consultant’s drawings, as mentioned above, we would then look to create an accurate 3D model using BIM (Building Information Modelling). The 3D model of the MEP services will then show all of the MEP services set within the architectural and structural limitations of the building. It is a very important part of the process as it lays the groundwork for several construction-related plans, sections and elevations. It can also be used for client input and to create a detailed walkthrough of the finished building.

Stage Three: Clash detection & resolution

At this stage of the process, the MEP coordination services contractor can look at the 3D model and evaluate it for any clashes or conflicts between the designed architectural elements and the MEP systems planned. Any inconsistencies can then be detected – including clearance and workflow clashes – and solutions can then be presented to the client.

Stage Four: Production of coordinated drawings

Once the 3D model has gone through the clash detection test process, MEP coordination drawings can then be prepared to show everyone involved on the project how the mechanical, engineering, plumbing and fire protection systems will work together in the same space.

Additional notes can be added to the 3D BIM model to ensure all of the size measurements are clear for each discipline. Elevations, isometric views and sections can also be used to explain and detail the layouts for anyone who needs access to that information.

Stage Five: Creation of detailed service drawings

The next stage in the process is about creating single service drawings with component size, height and distances from gridlines being added in order to give further detail. These drawings then feed into fabrication drawings which are used by the site installation teams.

Stage Six: Creation of fabrication, spool and hanger drawings

At this stage, fabrication, spool and hanger drawings can be created – if it is felt that they are necessary – and needed by CNC machines for production.

Stage Seven: As-fitted changes

The final stage of the MEP coordination process is when any changes to the model and drawings are made based on on-site changes or deviations from the original construction drawings.

If the coordination process has been well-coordinated, with the use of BIM, then the changes to the as-fitted drawings should be minimal.

Clash-free 3D MEP coordination and the resulting drawings are critical to building health. As experienced BIM coordination services providers, The CAD Room can take all of this process off your hands, leaving you free to concentrate on your other business processes.

To find out more about our wide range of services, including fire protection services and surveying services, please get in touch by calling us on 0161 427 0348, emailing us at or using the contact us form on our site.