Facility Architecture & Floor Guide

6-1. Logistics Facility Functions, Equipment, and Floor Specifications

1. Core Logistics Functions & Building Architectural Equipment

Logistics facilities function as dynamic hubs controlling cargo velocity rather than static storage space[cite: 21]. Key operational functions and supporting building equipment include[cite: 21]:

1.1 Primary Logistics Facility Functions

• Receiving & Inspection: Inspecting inbound cargo quantities and condition upon arrival[cite: 21].
• Storage & Inventory Management: Managing inventory under optimal conditions based on temperature, hazard, or size profiles[cite: 21].
• Picking & Value-Added Processing: Collecting ordered items and performing kitting, labeling, or repacking[cite: 21].
• Dispatch & Shipping: Sorting cargo by delivery route or carrier and staging for outbound truck loading[cite: 21].

1.2 Essential Building Architectural Equipment

Category	Equipment / Specification	Function & Operational Role
Loading Equipment	Truck Berths	Vehicle docking bays with deep rain canopies to protect operations during inclement weather[cite: 21].
	Dock Levelers	Bridges height gaps between dock floors and trailer beds, enabling direct forklift drive-in loading[cite: 21].
Vertical Handling	Freight Elevators	Transports heavy palletized loads vertically across building stories[cite: 21].
	Vertical Material Conveyors (VMC)	Automated vertical transfer offering higher speed and smaller footprints than standard elevators[cite: 21].
Floor & Envelope	Elevated vs. Flat Docks	Elevated docks (~1.0m height for heavy trailers) vs. Flat docks (GL±0m for parcel vans)[cite: 21].
	High Load-Bearing Floors	Slab capacities rated ~1.5 t/m² with dustproof resin surface hardeners[cite: 21].
	Clear Ceiling Heights	Clear heights of 5.5m–6.5m per floor to maximize vertical rack storage density[cite: 21].
Environmental & Safety	Temperature Controls	Insulated panels, dehumidifiers, and HVAC units for cold-chain integrity[cite: 21].
	Fire Safety & Security	Automated sprinklers, fire doors, and access control gates/CCTV systems[cite: 21].
Access & Amenities	Spiral Ramps	Circular ramp structures providing heavy trucks direct vehicular access to upper floors[cite: 21].
	Worker Amenities	Employee lounges, cafeterias, convenience stores, and truck driver shower facilities[cite: 21].

2. Inbound & Outbound Loading Equipment Details

Loading dock equipment connects external transport fleets with internal warehouse storage, directly dictating facility operational throughput and safety[cite: 21].

2.1 Truck Berths (Docking Bays)

Dedicated docking positions for truck parking, unloading, and loading[cite: 21]:

• Layout Formats:[cite: 21]
  • Perpendicular (90-Degree) Berths: Standard dock layout positioning trucks perpendicular to the building line[cite: 21].
  • Sawtooth (Sawnose) Berths: Angled dock positions (e.g., 45 degrees) utilized on narrow sites to reduce truck apron turning radiuses[cite: 21].
• Primary Accessories:[cite: 21]
  • Rain Canopies: Protects cargo from rain damage during loading[cite: 21]. Modern facilities specify 5m to 8m+ canopy depths to cover full trailer lengths[cite: 21].
  • Wheel Stops & Alignment Guide Rails: Guides trucks safely into berth alignment and prevents structural wall impacts[cite: 21].

2.2 Dock Height Comparison: Elevated vs. Flat Docks

Dock Structure	Floor Height	Characteristics & Primary Applications
Elevated Dock (High Floor)	GL +1.0m to 1.1m[cite: 21]	Aligns warehouse floor height flush with heavy truck bed heights[cite: 21]. • Applications: Palletized freight, wing-body trucks, and 10t trailers[cite: 21]. • Advantage: Forklifts drive directly into trailer beds for rapid loading[cite: 21].
Flat Dock (Low Floor)	GL ±0m (At-Grade)[cite: 21]	Warehouse floor is flush at grade with outdoor pavement[cite: 21]. • Applications: Parcel express hubs, manual loading, delivery vans[cite: 21]. • Advantage: Accommodates all vehicle types; roll-box pallets roll smoothly[cite: 21].
Hybrid Dock Format	Elevated + Flat[cite: 21]	Combines elevated and flat dock bays within a single facility for multi-tenant versatility[cite: 21].

2.3 Auxiliary Dock Equipment

• Dock Levelers: Hydraulic or airbag-operated levelling plates bridging height gaps between elevated docks and trailer beds, enabling forklifts to drive inside[cite: 21].
• Dock Shelters / Seals: Inflatable or foam cushions sealing gaps around trailer bodies during docking, maintaining temperature control in cold storage and blocking pest/rain ingress[cite: 21].
• High-Speed Roll-Up Doors: Automated curtain doors operating at several meters per second to prevent thermal loss and outdoor air infiltration[cite: 21].
• Dock Locks (Vehicle Restraints): Mechanical hooks locking trailer rear bumpers to prevent premature departure accidents during forklift loading[cite: 21].

3. Elevated vs. Flat Dock Cost Analysis

Architectural and equipment CAPEX differences between Elevated (GL+1.0m) and Flat (GL±0m) docks stem from earthwork volumes, structural slab reinforcement, and specialized dock levelers[cite: 21]. Generally, Elevated Docks increase initial construction CAPEX by approximately 10% to 20% compared to Flat Docks[cite: 21].

3.1 Cost Comparison Summary

Cost Factor	Elevated Dock Format	Flat Dock Format	Primary Cost Driver
Foundation & Earthwork	High[cite: 21]	Standard[cite: 21]	Requires extensive earth fill, retaining walls, or pit slab structures[cite: 21].
Slab Structural Capacity	Moderately High[cite: 21]	Standard[cite: 21]	Impact-resistant slab design required for direct forklift trailer drive-in[cite: 21].
Dock Equipment CAPEX	High[cite: 21]	Very Low[cite: 21]	Mandates dock levelers (1.5M–3.0M JPY/unit) and dock seals[cite: 21].
Overall Construction Cost	Baseline (1.1–1.2)[cite: 21]	Baseline (1.0)[cite: 21]	Elevated designs increase cost per square meter/tsubo[cite: 21].
Ongoing Maintenance	Moderately High[cite: 21]	Low[cite: 21]	Periodic inspection and hydraulic leveler maintenance costs[cite: 21].

3.2 Additional Cost Items for Elevated Docks

1. Earthwork & Pit Construction: Large-scale earth filling or hollow pit slab construction to raise floor levels by ~1.0m, plus heavy retaining walls[cite: 21].
2. Dock Leveler CAPEX: 1.5M to 3.0M JPY per bay (unit + installation)[cite: 21]. A 10-bay dock adds 15M to 30M JPY in direct equipment CAPEX[cite: 21].
3. Ramps & Access Stairs: Vehicle access ramps and personnel stairs allowing forklifts and staff to transition from grade into elevated warehouse areas[cite: 21].

3.3 Selection Decision Guidelines

[When to Select Elevated Docks][cite: 21]
• Heavy long-haul truck fleets (10t trailers, wing trucks) dominate traffic[cite: 21].
• High pallet volume requiring direct forklift drive-in trailer loading[cite: 21].
• Weatherproof rain protection and flood prevention elevated slab buffers are critical[cite: 21].

[When to Select Flat Docks][cite: 21]
• Initial building construction CAPEX must be minimized[cite: 21].
• Operations focus on roll-box carts, parcel sorting, or manual loading (e-commerce hubs)[cite: 21].
• Diverse light delivery vans, small trucks, and box vans dock at the facility[cite: 21].

4. Floor Slab Engineering (Load Capacity, Coatings, Flatness, Repairs)

Warehouse floor slabs serve as the foundational infrastructure supporting massive static loads from high-bay racking and dynamic impacts from forklifts and AGVs[cite: 21].

4.1 Three Essential Floor Performance Metrics

1. Load Bearing Capacity (Slab Strength):[cite: 21]
   • Standard General Warehouse: 1.5 t/m²[cite: 21]
   • Heavy Freight / Machinery Warehouse: 2.0 t to 3.0 t/m²+[cite: 21]
   • Must withstand point loading under high-bay rack post feet and heavy forklift wheels[cite: 21].
2. Flatness (Super-Flat Floor Standards): Essential for Very Narrow Aisle (VNA) forklifts, AGVs/AMRs, and automated high-bay AS/RS to prevent vehicle tipping or optical sensor reading errors[cite: 21].
3. Wear Resistance & Dustproofing: Prevents concrete abrasion dust generated by wheel traffic from contaminating goods or damaging electronics[cite: 21].

4.2 Primary Floor Finishes & Resin Coatings

Floor Finish Type	Key Features & Advantages	Primary Applications
Surface Hardener Finish (Ferrocon / Power Trowel Finish)[cite: 21]	Hardens concrete top layer; cost-effective with high wear and dust resistance[cite: 21]. Standard finish[cite: 21].	General dry warehouses, travel aisles, loading bays[cite: 21]
Epoxy Resin Coating	Excellent oil/chemical resistance; hard film that is easy to clean and paint lines[cite: 21].	Precision goods storage, packing areas, walkways[cite: 21]
Waterborne Polyurethane Coating	Superior heat, cold, and impact resistance; withstands -30°C and hot washdowns[cite: 21].	Freezer / Cold Storage, food processing zones[cite: 21]
Anti-Static (ESD) Coating	Prevents static buildup to protect electronic components and prevent spark hazards[cite: 21].	Semiconductor warehouses, hazardous material storage[cite: 21]

4.3 Specialized Structures & Slab Maintenance

• Frost-Heave Prevention in Freezer Slabs (-25°C): Sub-slab insulation and underfloor heating cables/ventilation pipes prevent soil freezing and slab heaving[cite: 21].
• Expansion Joint Fillers: High-load epoxy joint fillers prevent edge chipping (spalling) under heavy forklift wheel impact[cite: 21].
• Crack Repair Management: Micro-cracks are injected with epoxy resins immediately to prevent AGV navigation sensor faults or wheel damage[cite: 21].