Working with Consultants - Mastering Autodesk Revit Architecture 2015 - page 225

Using Interference Checking in 3D Coordination
In addition to asset management, digital fabrication, and cost estimation, 3D coordination is one
of the most important uses of building information modeling. It has enormous potential to reduce
the costs of construction through the computerized resolution of clashing building elements
as well as exposing opportunities for alternate trade scheduling or prefabrication. The key
component to achieving 3D coordination is interference checking, also known as clash detection .
Indiana University Defines Clashes
as we mentioned previously in this chapter, not only are some building and facility owners requiring
BiM processes and deliverables for new projects, but they are also defining how these processes are to
be utilized. When you focus on interference checking, the myriad of potential clashes can be distilled
into a prioritized grouping of building elements. Borrowing from indiana university's BiM standards
& guidelines for architects, engineers, & Contractors, the following is an intelligent approach to the
organization of potential interferences. (always remember that the priorities listed here are based
on the requirements of one organization. The needs of your firm and those of your clients may vary.)
Level One Clashes
Clashes in these categories are considered the most critical to the coordination process. They usually
relate to systems or construction techniques that are more costly to delay or reschedule.
◆ Mechanical ductwork and Piping vs. Ceilings
◆ Mechanical ductwork and Piping vs. rated Walls (for coordination of dampers and other
mechanical equipment needs)
◆ Mechanical ductwork and Piping vs. structure (columns, beams, framing, etc.)
◆ all equipment and Their applicable Clearances vs. Walls
◆ all equipment and Their applicable Clearances vs. structure
◆ Mechanical equipment and Fixtures vs. electrical equipment and Fixtures
◆ Mechanical ductwork and Piping vs. Plumbing Piping
Level two Clashes
These categories of clashes are considered important to the design and construction process but
are less critical than those designated as level one.
◆ Casework vs. electrical Fixtures and devices
◆ Furnishings vs. electrical Fixtures and devices
◆ structure vs. specialty equipment
◆ structure vs. electrical equipment, Fixtures, and devices
◆ ductwork and Piping vs. electrical equipment, Fixtures, and devices
◆ ductwork vs. Floors