Source: Berkley Design Professional, https://www.berkleydp.com/

Elevation data for curb height was improperly represented in the CAD files and plotted to the hard copy construction documents for a 2,500 linear-foot-portion of a concrete curb surrounding a large bus storage parking area. The policyholder, a civil/surveyor firm, neglected to perform a check of the 2D construction document deliverables in its QA/QC process. Approximately 1,500 linear feet of curb was placed prior to the error being discovered requiring tear out and replacement. Berkley Design Professional paid $175,000 on behalf of the policyholder and $30,000 in defense costs. The policyholder paid a $25,000 deductible.

Lessons learned:

Be sure to review printed 2D deliverables in the QA/QC process prior to issuing construction documents for bidding and construction. There can be errors in the process of plotting hard copy 2D deliverables from CAD and BIM files.