AGV Floor Requirements
Why Floors Are Critical for AGVs
Section titled “Why Floors Are Critical for AGVs”AGVs are more floor-sensitive than manned forklifts. A manned operator compensates for unevenness instinctively; an AGV does not. Floor deviation causes:
- Navigation drift (especially for magnetic tape and laser systems)
- Load tipping at high lift heights (amplified by mast deflection)
- Wheel wear and vibration that degrades sensors
- Joint impacts that damage battery and electronics
F-Number Standards (US)
Section titled “F-Number Standards (US)”The F-number system (FF = flatness, FL = levelness) is the US standard for slab-on-grade floors.
| Application | FF Minimum | FL Minimum |
|---|---|---|
| General commercial warehouse | FF 25 | FL 20 |
| Narrow aisle / light AGV | FF 35-50 | FL 25-35 |
| AGV free-movement zones | FF 70 | FL 50 |
| AGV-dedicated path zones | FF 100 | FL 75 |
Higher FF = flatter. Higher FL = more level. AGV requirements exceed standard warehouse specs by 2-4x.
TR34 Standard (UK / International)
Section titled “TR34 Standard (UK / International)”TR34 (Concrete Society Technical Report 34, 4th edition 2016) defines floor categories for industrial use. Defined Movement (DM) classifications apply to VNA and AGV aisles.
| TR34 Category | Rack Height | Application |
|---|---|---|
| DM1 | Top beam >13m | Very high VNA / tall AGV |
| DM2 | Top beam 8-13m | Standard VNA / AGV |
| DM3 | Top beam <8m | Lower rack VNA / pallet jack AGV |
Free Movement (FM) classifications apply to open floor areas where AGVs travel without fixed guidance (SLAM-based systems).
Quantitative Deviation Limits
Section titled “Quantitative Deviation Limits”| Parameter | Requirement |
|---|---|
| Max deviation per 3m straightedge | ±1.5mm |
| Max joint differential height | ≤1.0mm |
| Surface roughness (polished/epoxy) | Ra < 30 micrometers |
| Minimum compressive strength | 40-50 MPa |
| Minimum surface hardness | 6 Mohs |
Referenced Standards
Section titled “Referenced Standards”| Standard | Origin | Application |
|---|---|---|
| TR34 | UK (Concrete Society) | VNA and AGV defined-movement floors |
| F-number (ASTM E1155) | US | Flatness and levelness measurement |
| DIN 15185 | Germany | VNA warehouse floor requirements |
| VDMA Guidelines | Germany | AGV floor tolerance guidelines |
| FEM 10.2.14-1 | Europe | Racking installation floor requirements |
| F-min | US (FACE method) | Robotics and AS/RS floor survey |
Practical Notes for Specifying
Section titled “Practical Notes for Specifying”- Measure before you commit: Always commission an F-number survey before finalizing an AGV quote. Retrofitting a slab to FF 70+ is expensive ($15-40/sq ft depending on method).
- New construction: Spec FF 50/FL 35 minimum for any warehouse that may adopt AGVs in Years 1-5. Over-spec is cheaper than remediation.
- Joint treatment: Saw-cut contraction joints are the biggest failure point. Armor joints with steel edge protection or use joint-free slab pours for AGV lanes.
- Slope: Maximum 1-2% cross-slope in AGV travel paths. Steeper grades require speed reduction and are a stability risk at full load height.
- Existing buildings: Use grinding or self-leveling overlays (4-6mm epoxy-bound) to achieve AGV tolerance. Measure before and after with calibrated dipstick or Facemaster.
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