4 rows * 5 bays * 4 tiers * 2 PL = 160 PL capacity.
For Mobile Rack Option 1, area per PL is calculated as 0.79 m²/PL when auxiliary aisle areas are included.
When auxiliary aisle areas are excluded, required installation footprint drops to 107 m², achieving a higher storage efficiency of 0.67 m²/PL.
Section 3 Area Efficiency and Storage Efficiency Calculation for Mobile Racks (Electric Mobile Racking)
Overview of Mobile Racks (Electric Mobile Racking)
Mobile racks (electric mobile racking) consist of static selective pallet racks mounted on motorized carriages. Moving carriages laterally allows multiple rack rows to share handling aisles. Compared to static selective racks, this drastically reduces dedicated aisle space, maximizing both area efficiency and storage efficiency.
Structural Characteristics
- Height Differential: Because racks are mounted on motorized base carriages, overall rack height is elevated by the carriage base height (approx. 250 mm) compared to standard static racks.
- Rack Specification Standards: Specifications of the pallet racks mounted on carriages follow standard selective pallet racking criteria detailed in Section 2.
Spatial Design and Clearance Provisions
Area calculations for mobile racks incorporate equipment-specific maintenance clearances and shared aisle engineering principles.
- Impact of Pallet Dimensions: Modifying pallet (PL) dimensions dynamically recalculates total required floor areas for the entire mobile rack system.
- Adjacent Wall & Control Panel Clearance: Because control panel cabinets are mounted on the rear/side of carriages, a 400 mm setback clearance must be secured.
- Need for Auxiliary Aisles: When mobile rack blocks sit directly adjacent to primary transport aisles, individual auxiliary aisles can be eliminated.
Area Efficiency and Storage Efficiency Simulation Example
Based on the calculation example in reference data (4 rows × 5 bays × 4 tiers × 2 PL = 160 PL capacity), floor space occupied per pallet (PL) varies as follows:
| Conditions | Installation Area | Area per PL (Area Efficiency) |
|---|---|---|
| Including Auxiliary Aisles | — | 0.79 m²/PL |
| Excluding Auxiliary Aisles | 107 m² | 0.67 m²/PL |
Because per-pallet storage efficiency varies significantly depending on aisle and clearance design, simulation-driven optimization is essential.
Calculation Interface
Mobile racks (electric mobile racking) mount static PL racks onto motorized carriages, moving sideways to share handling aisles.
Overall rack height is elevated by 250 mm due to carriage height. For rack specifications mounted on carriages, refer to Section 2 Pallet Racks.
Pallet Dimensions and Control Panel Clearances
Modifying PL dimensions automatically recalculates total mobile rack floor area.
Auxiliary aisles are unnecessary if the rack area sits adjacent to primary corridors. Control panels mounted on the rear require a 400 mm setback clearance.
Required Area and Area per PL (Area Efficiency)
