Image courtesy of Mortenson/Power Mortenson/Power used laser scans to check the accuracy of BIM models on the $1-billion Ann and Robert H. Lurie Children's Hospital of Chicago. Related Links: http://enr.construction.com/technology/bim/2012/0430-annual-conference-hums-with-accelerating-uptake.asp Laser Scanning Hits Tipping Point http://enr.construction.com/technology/bim/2010/0609-virtualdesign-1.asp A Hospital Owner's Digital Mandate Most remodeling contractors still generate building information models for an existing structure from original construction drawings, and the inevitable deviations end up as field surprises that result in costly change orders and delays. Emerging 3D laser scanners streamline the workflow by taking the unknowns out of the equation."Laser scanning is the truth serum that fits into BIM," says Ken
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.