📋 Overview
The Storage Space TabPage calculates the required floor footprint for warehouse storage media—including pallet racks, shelf modules, and automated storage systems—based on inventory holding parameters, turnover rates, and rack specifications.
💡 Strategic Value of Storage Space Design
Storage footprint typically constitutes the largest square footage in distribution facilities. Proper sizing ensures:
- Optimized Inventory Holding: Eliminates wasted floor area while preventing capacity shortages.
- Enhanced Picking Productivity: Places fast-moving SKUs in optimal accessibility locations.
- Safety Compliance: Establishes adequate aisle clearance for forklift operation.
Key Calculated Components
- Net Storage Footprint: Pure floor space occupied by racks and stacks.
- Aisle Clearance Space: Travel aisles for forklifts and operators.
- Future Expansion Buffer: Floor area reserved for growth.
🎯 Purpose & Applications
1. Determining Storage Footprint
Core Objectives:
- Area Sizing: Computes gross storage area in m² or sq ft.
- Media Selection: Evaluates pallet racks, shelf modules, and ASRS.
- Clear Height Requirements: Calculates required ceiling clearance.
- Inventory Rotation Analysis: Evaluates inventory turnover velocity.
2. Practical Applications
| Planning Phase | Application | Evaluation Items |
|---|---|---|
| Greenfield Build | New Facility Design | Building clear height, floor loading capacity |
| Expansion Plan | Capacity Upgrade | Evaluating storage density enhancements |
| Media Transition | Automation Upgrade | Transitioning from floor stacking to ASRS |
📦 Storage Methodologies
1. Pallet Floor Stacking
Overview: Stacking pallets directly on the warehouse floor.
- Lowest CAPEX requirement.
- Stacking height: 2 to 5 tiers high.
- Aisle Clearance Ratio: 40% to 60%.
2. Selective Pallet Racking
Overview: Storing pallets in dedicated structural rack frames.
- 100% direct access to every pallet position.
- High vertical space utilization (6m to 12m height).
- Aisle Clearance Ratio: 35% to 50%.
3. Automated Storage & Retrieval System (ASRS)
Overview: High-density automated crane or shuttle storage.
- Maximum storage density with minimal aisle width.
- Aisle Clearance Ratio: 15% to 25%.
🔢 Calculation Logic
Core Storage Space Formula
Total Storage Space (m²) = Net Storage Area × (1 + Aisle Ratio %) × (1 + Expansion Buffer %)
Calculation Example (Pallet Stacking):
Peak Inventory = 20,000 cases
Cases / Pallet = 50 cases
Stacking Tiers = 4 high
Safety Stock Factor = 1.2×
Aisle Ratio = 50%
Expansion Buffer = 20%
Required Pallet Positions = (20,000 / 50) × 1.2 = 480 pallets
Floor Footprint Pallets = 480 / 4 = 120 pallets
Net Storage Area = 120 × 1.21 m² = 145.2 m²
Area with Aisles = 145.2 × (1 + 0.5) = 217.8 m²
Total Storage Space = 217.8 × (1 + 0.2) = 261.4 m²
Peak Inventory = 20,000 cases
Cases / Pallet = 50 cases
Stacking Tiers = 4 high
Safety Stock Factor = 1.2×
Aisle Ratio = 50%
Expansion Buffer = 20%
Required Pallet Positions = (20,000 / 50) × 1.2 = 480 pallets
Floor Footprint Pallets = 480 / 4 = 120 pallets
Net Storage Area = 120 × 1.21 m² = 145.2 m²
Area with Aisles = 145.2 × (1 + 0.5) = 217.8 m²
Total Storage Space = 217.8 × (1 + 0.2) = 261.4 m²
⚠️ Important Notes & Constraints
⚠️ Data Accuracy Baseline
Sizing accuracy relies on historical inventory averages over at least 12 months and 95th percentile peak stocking levels.