Meaning
Standardized flatness tolerances establish permissible surface elevation deviations across defined gauge distances for industrial building floors. Construction quality audits apply din 18202 line 4 to verify surface evenness on unlined concrete slabs intended for general logistics and manufacturing spaces. The standard defines maximum elevation gaps measured beneath a straightedge supported on two high points.
Its application scope covers finished floor surfaces in commercial buildings, ending where specialized narrow-aisle high-bay tolerances take precedence.
Measurement Baseline
Compliance assessment places a straightedge of specific length, such as one metre or four metres, across the concrete floor and measures the maximum gap underneath. Under din 18202 line 4, permissible gap limits scale with the distance between support points, allowing larger absolute deviations across longer spans. Optical leveling or continuous digital profilometers record these gaps during post-curing acceptance surveys.
Surface Compliance
Meeting specified elevation limits ensures smooth passage for standard forklifts and pallet jacks without causing vehicle instability or load vibration. Exceeding allowed gap depths requires localized floor grinding or topping application before floor acceptance occurs.
Deviation Boundary
The standard governs general surface evenness but does not measure overall slab inclination or structural tilt across an entire building bay. Structural levelness remains governed by separate line tables within the broader standard.
