F numbers provide architects and contractors a method of determining the flatness and levelness of a concrete floor slab.
Dipstick floor flatness.
Dipstick was selected for the construction of the world s tallest building and to measure the flattest and most level superflat slab ever constructed.
Testing labs building owners developers contractors universities research institutions and government agencies on six continents choose the dipstick because it produces the most accurate and repeatable flatness levelness data period.
It s been 45 years since the face companies started developing what became modern concrete floor flatness levelness technology.
Floor pavement profiler dipstick is the trade name of a profiling device manufactured by face construction technologies of norfolk virginia usa.
Dipstick readings are guaranteed to be accurate to 0 0125 mm less than 0 0005 that s 5 10.
Some of the industry misconceptions for floor flatness and levelness are the following.