Several months ago, a roofing subcontractor wanted 3DIS to scan a new building while it was being constructed. Some might think, “Why? It’s a brand new building. What good would scanning do?” Risk Management.
The subcontractor was charged with applying special, exterior wall panels. The panels are made in only one place, 1100 miles from the job site. They require special methods and parts to connect them to the building and to each other. The panels are not field modifiable. So if the panels are to fit, the superstructure must be built precisely according to design. The subcontractor wanted to laser scan the superstructure and compare it to the design model. Discrepancies could have been resolved prior to the panel installation.
Several factors, the schedule for the project, the weather, construction restrictions, and more, pushed the cost of scanning past the budget of the subcontractor. The GC was reluctant to share the costs, therefore, no scanning was done.
Months later, the subcontractor spoke to 3DIS about the project, which had been filled with unpleasant and costly surprises. The superstructure deviated from the design specifications in a number of places. Each deviation – of course they were found one by one – caused a work stoppage, rework of the superstructure, and everything attached to it. The delays and additional costs considerably exceeded the cost of scanning.
In today’s environment, owners want, and architects design, buildings that stand out, and that means buildings with odd angles, distances, shapes, and materials. Each unusual characteristic carries its own risk of errors during construction. 3D laser scanning gives CMRs and others a tool to reduce the risk and help identify potential issues to address them prior to adversely altering schedules, budgets and project time lines.