Technical standards of superflat floor
1. Technical standards superflat floor
- Floor construction is performed in accordance with ACI302.1R standard of the American Concrete Association;
- The design of flat applies to floor flatness and levelness standards ACI117 & BCSTR34 internationally recognized and approved ;
- F-Number (F-number system-FACE Floor Profile Number: the recommended method to describe the floor flatness and levelness) is used in the floor flatness and levelness measurement according to American ASTME1155 detecting method
- The fact that there must be two independent F-numbers for ground flatness and levelness is explained:
1). Flatness F-number (FF): shows bumpiness of floor through continuous variation of gap drop every 1-ft（300mm） when measurement is performed in the measured area
2). Level F-number (FL): shows compliance relative to floor level through continuous variation of gap drop every 10-ft（3m） when measurement is performed in the measured area .
To reach to those stardard, laser screed machine is required to be used.
2. Types of superflat floor constructed by laser screed
1. Concrete ground floor: Use floor with pressure exceeding 10 tons / m2;
2. Steel fiber concrete floor: it can reduce the floor thickness and control concrete cracks;
3. High-strength concrete floor: application of 30Mpa, the bearing capacity can reach to 300KG / cm2, the ground surface is made of other materials, and the construction work make it a high-strength floor；
4. Corridor area floor: used for warehouse floor with forklift height over 12 meters and frequent traffic
3. Superflat floor grade parameters
| Super flat grade | Shelf height | F-Number System | Approx.Tolerance | ||
|---|---|---|---|---|---|
| Flatness（FF） | Levelness （FL） | In 3 meter（mm） | |||
| Ultra flat | ≥150 | ≥100 | ≤1.0 | ||
| Super flat | >13m | ≥100 | ≥60 | ≤1.6 | |
| General flat | First type | 8~13m | ≥50 | ≥35 | ≤3.0 |
| Sec.type | 6~8m | ≥35 | ≥25 | ≤5.0 | |
| Third type | 1~6m | ≥25 | ≥18 | ≤6.0 |
If you want to know more about superflat floor please visit Technological process of superflat floor