MEP(3D) / BIM(4D)
Mech Coordination
Drawings & Services

MEP(3D) Overview
What is MEP(3D)?

BIM(4D) Overview
What is BIM (4D)?

General Contractor as Coordinator
How It Works
What’s Included?

Division 15
HVAC Trade as Coordinator
How It Works
What’s Included?

Division 15
Plumbing Trade as Coordinator
How It Works
What’s Included?


MEP (3D) / BIM (4D) Mechanical
Coordination Drawings & Services
General Contractor As Coordinator
How It Works

Coordination between the trades is all about maximizing the efficiency of the installation process by identifying potential conflicts and collisions between the trades prior to each trade fabricating and/or installing that trade on the job site. There is a hierarchy of sorts involved in coordination that helps to determine which trade will accommodate another trade when a conflict is detected and which trade will be scheduled to install before another.

With MEP / BIM coordination, the process changes from a typical 2D process to a total 3D process wherein all shop drawings, architectural drawings, and structural drawings are provided to JPK in 3D format only. The coordination review process changes to a purely 3D electronic platform rather than typical 2D and print media. JPK then uses a 3rd party software program to assemble all of the 3D drawings into one program and then model all of the 3D drawings into one drawing. Once assembled and modeled, a collision checking feature in the software allows JPK to find all of the conflicts that may exist between the trades, and /or with the structural members of the building.

The coordination process in MEP / BIM changes from phone, fax, and emailing of 2D cad files to an on-line meeting format available now through many sources. Each trade attends the on-line meeting to view the conflicts uncovered by the coordination team with the collision checking feature of the 3rd party software. From there, the process is much the same as a typical 2D process in that all parties are assigned various changes to further the coordination process based on the collision report provided by the 3rd party software wherein each trade makes the appropriate revisions and then typically posts their revised electronic 3D files to an assigned folder on the JPK FTP site.

The process repeats with the coordination team checking for conflicts, reporting any remaining conflicts after each round of revisions, and assigning remaining revisions until all conflicts have been resolved. A standard color coordination drawing is then issued for sign-off by each trade.

JPK assists the General Contractor in this coordination process as follows:
  1. Serving as a central agent representing the GC's interest by collecting and assembling all shop drawings from each trade;
  2. Providing a color conversion process for the GC that allows each trade drawing to be overlaid on top of each other on the same drawing;
  3. Converting all drawings to the same scale for uniformity of the review process and comparison of one trade to another;
  4. Deleting all shop drawing information from each trade that is not relevant to the coordination process;
  5. Identifying potential conflicts between the trades and/or with the structure of the building;
  6. Assigning each trade the role of resolving the conflict(s) based on the most logical solution as a recommendation by JPK;
  7. Continuing with the coordination process with each trade until all known conflicts have been resolved;
  8. Providing PDF and/or CAD files for the production of a color coordination drawing for use in a pre-planned coordination
Video - John Stebbins on Emerging Trends in BIM

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In the right place? JPK Drafting & Design, LLC specializes in HVAC Shop Drawings; Piping Shop Drawings; Plumbing Shop Drawings; MEP Coordination Drawings; MEP Lead Coordination Services (2D); HVAC BIM Coordination; Piping BIM Coordination; Plumbing BIM Coordination; & MEP Lead BIM Coordination Services (3D).