Construction lasers are used as an accurate level reference during any layout process. Applications include installing ceiling tiles and leveling floors, performing basic surveys, and even construction site grading.
In surveying and construction, the laser level is a control tool that includes a laser beam projector which is affixed to a tripod, leveled, and rapidly spun to indicate a horizontal plane. The laser beam projector has a rotating head with a mirror that sweeps the laser beam around a vertical axis. Some mirrors are self-leveling, while others can be manually adjusted.