Surface Regularity Inspection and FM/DM Floor Certifications

We specialise in quality control and our unique surveying equipment – Profilometer and deflection meters of SMG AXIOM 1155 enables us to measure flatness with utmost precision and technology and pace. Our intuitive Excel Report Generator gives you the ability to easily generate powerful 3D heat maps for any floor. Free movement areas are those where trucks can travel in multi-directional paths. These movement areas are considered less critical in terms of flatness and TR 34 sets out parameters on how an individual floor should be checked. The Free Movement (FM) specification (TR 34) has 3 classifications for flatness within free movement areas. These are FM1, FM2 and FM3 and all include the same properties for flatness measuring.


Property II.

The 600mm change in slope (rate of change) relates to the difference between two consecutive 300mm slope.


Property IV

States the difference in elevation between two points on a 3m grid should not exceed a certain value depending on the FM classification.


Defined movement

The defined movement specification (TR 34, 1994) has 3 classifications for flatness within aisles. These are Super flat, Category 1 and Category 2 and all include the same properties for flatness measuring.


Property I.

Controls the difference in level between two points separated by 300mm along each wheel track.


Property II.

The 600mm change in slope (rate of change) relates to the difference between any 2 consecutive Property 1 readings.


Property III.

Controls the difference in level between two points separated by the forklift truck’s wheeltrack. The values listed in the table of TR34 are absolute and must not be confused with a deviation from a horizontal plane.



Floor Class Typical Floor Use E F
FM1

Where very high standards of flatness and levelness are required.

Reach trucks operating at above 13m without side-shift.

4.5 1.8
FM2

Where very high standards of flatness and levelness are required.

Reach trucks operating at above 13m without side-shift.

4.5 1.8
FM3

Where very high standards of flatness and levelness are required.

Reach trucks operating at above 13m without side-shift.

4.5 1.8
FM4

Where very high standards of flatness and levelness are required.

Reach trucks operating at above 13m without side-shift.

4.5 1.8
NOTE: Side-shift is the ability of a truck to adjust the pallet transversely to the fork direction.
Floor Classification Racking Top Beam Height Property Z SLOPE Property dZ Property d2 Z Property dX Property d2 X
Calculation - mm per m Z × Z SLOPE dZ × 0.75

Fixed values
2 × ZSLOPE × 1.1

Fixed values
DM1

Over 13m

1.3 Z × 1.3 Z × 1.0 2.9 1.5
DM2 8–13m 2.0 Z × 2.0 Z × 1.5 4.4 2.0
DM3 Up to 8m 2.5 Z × 2.5 Z × 1.9 5.5 2.5


Properties Measured


The following properties are defined in Figures 3.8–3.10 as follows:

Property Z: The transverse dimension between the centres of the truck front wheels, in m.

Property X: The longitudinal dimension between the centre of the front and rear truck axles. This is taken to be a fixed 2m.

Property ZSLOPE: The cross-aisle slope between the centres of the truck front wheels in mm/m.

Property dZ: The elevational difference in mm between the centres of the truck front wheels.

Property dX: The elevational difference in mm between the centre of the front axle and the centre of the rear axle.