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. The system directly controls future vehicle motions by limiting all six of the surface variables that affect hard-axle vehicle motions.
The turret truck manufacturers strive to achieve higher truck speeds, increase truck stability, and reach greater rack heights to increase productivity.
Without a flat and level floor on which to run, however, their efforts are worth nothing. If the floor is too bumpy, the truck will shake too much, and the driver won’t drive the truck at top speed. More trucks will be needed to move the same number of pallets, and the anticipated advantages of the warehouse will be diminished.
As a consequence, floor requirements have to be well-specified and those variables that affect the truck’s movements must be limited. Unfortunately the gaps under 1, 2, 3, and 4 meter long straightedges are not the variables that influence truck movements. For this reason, the specification formats employed in DIN 15185 and VDMA are not effective.
The six surface variables uniquely limited by Fmin (no other system employs this dynamic simulation approach) control the movements of a truck as it moves across the floor (for more information on the six variables go to ‘Specifier’s Guide to F-Numbers’)
The Fmin System (developed by Allen Face in 1979) is used to control the wheel track profiles on all Defined Traffic floors. Fmin directly limits each wheel track’s influence on the truck’s angular displacements, angular velocities, and angular accelerations around both its pitch and roll axes. Fmin is thus a full-fledged Vehicle Simulation System that controls both the statics and dynamics of the truck at all locations within the aisle.