One of the primary uses of three-dimensional CAD software in construction coordination is to

• A. Create detailed 3D models for aesthetics
• B. Detect interferences between trades
• C. Calculate insurance costs
• D. Produce 2D floor plans

Answer: (B)

In construction coordination, the main use of three-dimensional CAD is clash detection—finding where different trades’ components overlap in the same space. A single integrated 3D model lets the team visualize how mechanical, electrical, plumbing, and structural elements fit together, and the software can automatically flag conflicts such as a duct colliding with a beam or a pipe hitting a wall sleeve. Identifying these interferences early lets designers adjust routes, sizes, or layouts before construction begins, which reduces costly rework, delays, and field problems. While 3D models can help with visuals and can generate 2D drawings, the core benefit in coordination is preventing interferences between trades. Insurance costs aren’t determined by this coordination activity.