What type of level is used primarily in construction for establishing grades and aligning structures?

The engineer's level is specifically designed for precision tasks in construction and surveying, making it an ideal choice for establishing grades and aligning structures. This type of level features a telescopic sight, which allows for accurate measurements over long distances. It typically provides a better accuracy compared to other types of levels, such as the slope level, hand level, or bubble level.

The engineer's level can be set up on a tripod and utilized with leveling rods to measure differences in elevation across a job site, which is essential in ensuring that constructions are built correctly according to the specified grades. Its optical capabilities enable surveyors and construction professionals to make precise adjustments necessary for horizontal alignment and slope management, which are critical to the integrity and safety of structures.

While other levels like bubble levels and hand levels can be used for minor tasks or in less precision-required settings, they do not match the accuracy or functionality of an engineer's level for professional-grade construction work.