F Min Floor Flatness

Defined traffic floors use an fmin number.

F min floor flatness.

F min is not calculated like f f or f l. The ff fl and f min systems are completely different measuring systems and there is no corresponding index for comparison purposes. A superflat defined traffic floor is defined by fmin 100. F numbers were developed in the 1980s to provide a systematic quantitative way to indicate the flatness and levelness of a concrete floor.

They are measured differently. Think of these bumps and high areas like the knuckles on your hand. A random traffic floor can be superflat by having an ff 100. Each system has a defined purpose for a given environment.

The ff floor flatness measurement reads the bumps highs and lows in the slab and higher numbers are better. In other words floor flatness is a statistical measurement of how wavy or bumpy a concrete floor is and takes into account the amplitude height if the waves and the wavelength horizontal distance between waves. F min is actually a direct measurement of the floor surface in the wheel path of the forklift for which the defined traffic area is designed. A single f number f min is therefore used to define the worst acceptable flatness and levelness conditions in a vna aisle and this f min value is assigned based on the expected lift truck and rack height as in table 1 1 overleaf.

Ff fl tolerances floor flatness floor levelness for random traffic floor surfaces and fmin tolerances for defined traffic agv floor surfaces. The system directly controls future vehicle motions by limiting all six of the surface variables that affect hard axle vehicle motions. Floor flatness levelness one of the things that distinguishes a high tolerance floor is its f number requirement. The more bumps there are the lower the ff number will be and the more difficult it will be for a polished concrete floor to have a uniform appearance.

It differs from the normal ff fl f numbers in that it is measured with a different instrument and is a continuous measurement. A defined traffic floor cannot be described with the random traffic floor f numbers. There is no direct relationship between f min and ff fl. There are two variations of the f number system.

On the other hand random traffic floors where the traffic moves in all directions use ff and fl numbers to define flatness and levelness. For defined traffic floors the flatness and levelness are measured using a single number called f min. An f min 50 specification corresponds to a flatness tolerance of. F min testing fmin is the most advanced method available for gauging a floor s ability to support wire or rail guided lift truck traffic in narrow aisle warehouses.

An f min 100 specification is a baseline number corresponding to a flatness tolerance of 1 8 in 10 0.