Storage Cage & Stillage — Post Pallet & Rigid Cage Solutions for Every Warehouse
Purpose-built rigid metal containment for manufacturers, distribution centres, hazmat depots and 3PL operators. Post pallets, foldable stackable stillages, mesh-panel cages and lockable security cages engineered for 500–2,000 kg capacity, 3–5 unit vertical stacking and forklift-truck compatibility. AME Rack manufactures EN 12674 / EN 15629 / AS/NZS 3775 / OSHA-compliant storage cages — exported to 65+ countries.
Stack Rack — Storage You Can Stack, Move, Fold
Stack racking (also called portable stack rack, foldable stacking rack, post stacking rack, removable stacking rack, demountable storage rack, collapsible pallet rack or mobile stack rack) is a self-contained welded steel frame with 4 corner posts that interlock vertically when stacked. Each unit holds one pallet or one bulk load (tyre, fabric roll, drum, oversize parts); units stack 4–5 high when fully loaded — creating instant tall storage without any racking installation.
When empty: remove the corner posts (or fold them down) to flatten the base 60–70%. Stack the empty frames for storage or ship them efficiently. No anchors, no permits, no slab grinding — fork-truck the entire unit anywhere on site at any time. Standard architecture for tire, fabric roll, automotive parts, seasonal stock, project-site staging and rental storage.
Why Stack Racking Is the Most Flexible Storage Solution
Eight engineering and operational advantages that explain why portable stack racks are the standard storage for tire dealers, fabric warehouses, project sites, rental fleets, and any operation that needs flexible reconfigurable storage without rack-installation commitment.
Zero Installation
No anchors, no concrete drilling, no slab grinding, no installation crew. Unloaded from container and ready to use in 5 minutes per unit.
Stack 4–5 High
Self-interlocking corner posts let units stack 4–5 high when loaded — instant vertical storage without buying tall racking infrastructure.
Folds Flat -60%
Empty stack racks fold to 30–40% of assembled volume — perfect for seasonal storage, rental return, container reload, off-site staging.
No Building Permit
Classified as mobile equipment, not structural racking. No building permit, no fire-marshal review, no insurance amendment in 95% of jurisdictions.
Fork-Truck Anywhere
Forklift moves the whole loaded unit anywhere on site or between sites. Perfect for cross-dock, project staging, vehicle loading, mobile workshops.
Indoor or Outdoor
HDG hot-dip galvanised 80–120 μm finish for outdoor yards and coastal sites. Powder coat for indoor warehouse use.
Reusable 10+ Years
Heavy-duty welded steel construction — survives 100+ stack-fold cycles. Resale value 60–70% of new after 5 years for rental fleet operators.
Compact Container Loading
Fold-flat design — average 80–120 stack racks per 40HQ container (vs 30–40 if shipped assembled). Slashes inbound freight cost.
Three Stack Rack Configurations for Every Storage Profile
From foldable rental-fleet stackers to fixed heavy-duty stackable units and modular detachable systems — match the base design, empty-state footprint and assembly method to your operating needs.
Foldable Stack Rack
Hinged posts fold down 90° onto the base when empty — reduces return-leg freight cost and empty-state warehouse footprint by up to 75%. 800–1,500 kg per unit, 3–4 units high when loaded. The standard choice for rental fleets, closed-loop distribution and reverse logistics.
Stackable Stack Rack
Fixed 4-post construction with reinforced corner cups that lock stacked units together — 800–2,000 kg per unit, up to 5 units high. Full welded frame delivers maximum structural rigidity for tire, parts, drum, IBC and general-purpose stack storage.
Detachable Stack Rack
Bolt-together modular design — posts remove from the base, base disassembles into flat components. Ships flat-pack for maximum container efficiency (up to 4× density vs welded stackers). Field-assembled in 15 minutes, reconfigurable for changing SKU profiles.
Engineered Technical Parameters — 3 Standard Configurations
Standard catalogue specs across the three stack rack architectures. All dimensions, post gauges, capacity and finish fully customisable — send load, stacking height target and empty-return requirement for a project-specific quote.
| Parameter | Foldable | Stackable | Detachable |
|---|---|---|---|
| ▎Application & Structure | |||
| Best For | Rental fleets, closed-loop distribution, reverse logistics | Tire, parts, drum, IBC, general-purpose stack storage | Export shipping, changing SKU profiles, field-reconfigurable |
| Base Design | Hinged 4-post fold-flat | Welded fixed 4-post | Bolt-together modular knock-down |
| Assembly | Pre-assembled, folds in 10 s | Pre-assembled, ready to use | Flat-pack, 5 min field assembly |
| ▎Load & Stacking | |||
| Load Capacity | 800 – 1,500 kg | 800 – 2,000 kg | 800 – 1,500 kg |
| Stacking Height (loaded) | 3 – 4 units | Up to 5 units | 3 – 4 units |
| Empty-State Footprint | -75% folded | 100% (rigid) | -70% disassembled |
| Forklift Entry | 4-way | 4-way | 4-way |
| ▎Dimensions (Standard) | |||
| External W × D | 1,200 × 1,000 mm | 1,200 × 1,000 mm | 1,200 × 1,000 mm |
| Overall Height (assembled) | 1,200 – 1,800 mm | 1,200 – 2,000 mm | 1,200 – 1,800 mm |
| Folded / Flat Height | ~ 260 mm (folded) | — | ~ 180 mm (flat-pack) |
| Custom Sizes | Available | Available | Available |
| ▎Structure & Materials | |||
| Post Profile | Box 50 × 50 × 2.5 mm | Box 60 × 60 × 3.0 mm | Box 50 × 50 × 2.5 mm |
| Base Frame | C-channel 80 × 40 × 4 mm | C-channel 100 × 50 × 5 mm | C-channel 80 × 40 × 4 mm |
| Steel Grade | Q235B | Q235B / Q345B | Q235B |
| Corner Cups / Locks | Snap-in fold latch | Reinforced corner cups | Bolt-in socket connector |
| ▎Finish & Compliance | |||
| Surface Finish | Powder coat 60 – 80 μm | Powder coat 60 – 80 μm (HDG optional) | Powder coat 60 – 80 μm |
| Outdoor / Marine Option | HDG 80 – 120 μm available | HDG 80 – 120 μm available | HDG 80 – 120 μm available |
| Compliance | EN 12674 · AS/NZS 3775 | EN 12674 · EN 15629 · AS/NZS 3775 · OSHA | EN 12674 · AS/NZS 3775 |
| ▎Commercial | |||
| Lead Time | 15 – 20 days | 12 – 18 days | 15 – 20 days |
| MOQ (units) | 50 | 50 | 50 |
| Container Load (40HQ) | ~ 320 pcs (folded) | ~ 90 pcs (rigid) | ~ 380 pcs (flat-pack) |
Every Base, Post and Connector — In-House Manufactured
Ten core components fabricated under one roof at AME Rack's 15,500 m² Dongguan plant. Full robotic welding per ISO 5817 Class B. Standard models hold IPPC heat-treatment marking for international export without timber-quarantine issues.
Welded Base Frame
Box-section steel 60×40 mm to 80×60 mm fully welded perimeter + cross-bracing. Forklift pocket cut-outs on 2 or 4 sides for any-direction approach.
Corner Post (Fixed or Hinged)
Box section 50×50 mm to 75×75 mm. Detachable (drop-in pin) on standard model OR hinged-foldable on collapsible variant — folds 90° onto base when empty.
Post-to-Base Connector
Drop-in pin (gravity lock) for fixed model; spring-loaded hinge + safety pin for foldable. Tested to 1.5× rated load per project-specific FEA.
Top Corner Receiver
Funnel-shaped steel guide at top of each post — receives the next unit's post foot during stack-up. Self-aligning to ±25 mm forklift placement tolerance.
Cross-Brace (Optional)
Horizontal cross-bar between front posts — adds stability for tall narrow loads (rolls, drums). Removable for forklift pallet entry from front side.
Cradle / Saddle Insert
Tire variant: curved cradle base sized to tire diameter. Fabric variant: A-frame saddle for rolls. Drum variant: retaining lip + spill containment.
Forklift Pocket
2-way (90×280 mm) or 4-way (any-direction approach) cut-out in base. Reinforced with internal plate to prevent fork-tine deformation over thousands of cycles.
Load Capacity Label
Aluminium load plate riveted to base — max load per unit, max stack count, max gross weight per stack. Mandatory per OSHA 1910.176 / EN 1090.
Stack Stop / Anti-Slide
Optional rubber pads or steel lugs on top corners — prevent stacked unit from sliding during seismic events or forklift impact on the stack.
Optional Wheels
4 × 100 mm polyurethane caster wheels (2 swivel + 2 fixed, with brake) for hand-pushable mobile variant. Adds USD 35–55 per unit.
Where Stack Rack Delivers Maximum ROI
Eight industries where portable stack racks solve floor-space and vertical-storage problems no fixed racking can.
Tire & Wheel Storage
Tire diameter 600–1,200 mm, 8–12 tires per unit, stacked 3–4 high in tire depots and dealerships.
Textile & Fabric Rolls
1.0–3.0 m fabric / carpet / vinyl rolls in vertical or horizontal cradle orientation.
Construction Site Storage
Portable stack racks for construction material — HDG outdoor variant survives site conditions.
Spare Parts DC
Palletised heavy or awkward spare parts that cannot fit in bin shelving — engine blocks, gearboxes.
Automotive Manufacturing
Body panels, bumpers, glass sheets — automotive-plant stackable production storage.
Drum & IBC Warehouse
200 L drums or 1,000 L IBC tanks, 2–3 high stacking with UN 3091 hazmat spill containment.
Seasonal / Temporary
Foldable variant — deploy in peak season, fold flat and stash in off-season for zero warehouse footprint.
Aerospace & Aviation
Aircraft parts, oversized MRO components in reinforced HDG stack racks for hangar operations.
How to Spec a Stack Racking System in 3 Decisions
Stack racking looks simple, but a misspec creates an unsafe stack. Work through these three decisions before requesting a quote — most procurement mistakes happen because one of them was skipped.
Match Capacity to Your Load Profile
Total stack load multiplies fast. A 1,000 kg unit stacked 4 high carries 4,000 kg on the bottom unit's posts — choose capacity from the heaviest stack, not the lightest pallet.
- 500 kg/unit — Tires, fabric rolls, light foam, seasonal goods
- 1,000 kg/unit — General pallets, auto parts, cartoned goods
- 1,500 kg/unit — Heavy SKUs, drum & IBC, steel parts
- 2,000 kg/unit — Construction, machinery, mould storage
Choose Stack Height (Bottom Unit Capacity)
Each stack rack is rated by per-unit capacity. The bottom unit carries the cumulative weight of all units above. Don't exceed 4–5 high without engineering review.
- 2 high — Most conservative; aisle-edge or near-doors
- 3 high — Common default; 6m+ ceiling minimum
- 4 high — Standard storage rooms; bottom unit must carry 3×load
- 5 high — Maximum; only with heavy-duty post + engineering sign-off
Foldable, Detachable, or Welded?
Three post-connection systems with different trade-offs on portability, durability and cost. Pick the one that matches your reuse cycle.
- Welded fixed — Strongest, cheapest; cannot fold; permanent shape
- Detachable posts — Posts unpin from base; flat-pack ship; reassemble on site
- Hinged foldable — Posts fold flat into base; 60–70% volume reduction; rental fleet favourite
| Selection Criteria | Welded Fixed | Detachable Post | Hinged Foldable |
|---|---|---|---|
| Best for use case | Permanent yard, max load | Long-haul export, flat-pack | Rental fleet, seasonal cycle |
| Capacity range | 500–2,500 kg/unit | 500–2,000 kg/unit | 500–1,500 kg/unit |
| Empty volume reduction | 0% (full size) | ~50% (posts removed) | 60–70% (folded flat) |
| Setup time per unit | Pre-built (0 min) | 2 min (4 pins) | 30 seconds (unfold) |
| Post connection | Welded permanent | Drop-in pin + clip | Hinged + locking pin |
| Stack height (loaded) | 4–5 high | 3–4 high | 3–4 high |
| Cost per unit (USD FOB) | $ Lowest | $$ Mid | $$$ Highest |
| Container loading (40HQ) | ~80 units | ~180 units | ~280 units |
| Repair if post bent | Cut & re-weld | Swap post (5 min) | Swap post (10 min) |
Stack Racking vs. Selective Pallet Rack · Cantilever · Boltless Shelving · Mobile Pallet Rack
Where stack racking wins, where fixed racking wins. Use this matrix to defend your spec internally — every row is what a real procurement manager asks.
| Criteria | Stack Rack | Selective Pallet Rack | Cantilever Rack | Boltless Shelving | Mobile Pallet Rack |
|---|---|---|---|---|---|
| Installation required | None (drop & stack) | Bolted + anchored | Bolted + anchored | Tool-less assembly | Rail-mounted, complex |
| Building permit needed | No | Often yes (>6m) | Often yes | No | Always yes |
| Floor anchor | Not required | Required (chemical) | Required (heavy) | Not required | Rail-anchored |
| Relocatable | ★★★★★ | ★★★★★ | ★★★★★ | ★★★★★ | ★★★★★ |
| Fold-flat empty | 60–70% volume reduction | No | No | ~30% (knock-down) | No |
| Loaded stack height | 4–5 units | 10–12 m (frame) | 6–8 m | 2.4 m typical | 10 m+ |
| Storage density | ★★★★★ | ★★★★★ | ★★★★★ | ★★★★★ | ★★★★★ |
| Direct access | ★★★★★ (top unit) | ★★★★★ | ★★★★★ | ★★★★★ | ★★★★★ |
| Outdoor use | ★★★★★ (HDG) | ★★★★★ | ★★★★★ | ★★★★★ | ★★★★★ |
| Best use case | Tires, fabric, rental, outdoor | General pallet DC | Long stock (pipe, lumber) | Hand-pick light goods | Cold-storage density |
| Lead time | 15–20 days | 20–25 days | 25–30 days | 10–14 days | 45–60 days |
| CapEx per pallet | $ | $$ | $$ | $ (light only) | $$$$$ |
⭐ AME Rack's Honest Verdict
Pick stack racking when you need flexible, temporary, outdoor-tolerant or seasonal storage — tire dealers, fabric distributors, construction sites, 3PL rental fleets, production-line buffer. Stay with selective pallet rack when your warehouse is a permanent DC with high SKU rotation and reach-truck operations. Cantilever beats stack rack for any load longer than 2.4m (pipe, lumber, sheet metal). Boltless shelving wins on hand-pick light goods under 200 kg/shelf. Mobile pallet rack wins on cold-storage CapEx-per-cubic-metre — but only if you can wait 45+ days and pay 4–5× the unit price.
6-Stage Manufacturing & Quality Pipeline for Stack Racks
Every stack rack leaves our Dongguan factory through a 6-stage production line built around mill-certified steel, robotic welding, in-line load testing and full-container loading verification.
Material Inbound
Q235B / Q345B steel sheet & tubing sourced from Baosteel, Shagang & Ansteel. Each coil arrives with mill test certificate; AME Rack QC re-tests random samples for yield strength, elongation and chemistry.
CNC Cutting & Bending
Laser cutting (±0.2mm), hydraulic press-brake forming for base channels (4–6mm), CNC tube cutter for vertical posts. All slot positions held to 1.0mm tolerance for repeatable post insertion.
Robotic Welding
4-station Panasonic robotic welder forms the base frame and post sockets. MIG welding with ER70S-6 wire — full-penetration welds at every corner joint, verified by ultrasonic spot-check per EN 1090 Class EXC2.
Surface Prep
7-stage pre-treatment: degrease → rinse → phosphate → rinse → passivate → rinse → dry. Standard finish: Akzo Nobel powder coat 60–100 μm. Outdoor variants: hot-dip galvanise 80–120 μm per ISO 1461.
Assembly & Load Test
Hinged variants assembled with M16-grade 8.8 bolts and locking pins. Each batch tested with 1.5× rated load (held 24 h, deflection ≤ L/200). Foldable variants cycle-tested 200× fold-unfold without deformation.
Packaging & Container Load
IPPC ISPM-15 wood pallets, PE film wrap, edge guards. Foldable units pre-folded for max density (~280 units / 40HQ). Photo + video proof-of-loading sent before vessel sails.
How to Buy Stack Racking — A 6-Point Importer Checklist
Six things every importer, distributor and warehouse owner should validate before placing a stack racking PO. These are the questions our top customers always ask.
📋 1. Specification Confirmation
- Per-unit capacity and stack-height capacity stated separately
- Connection type confirmed: welded / detachable pin / hinged foldable
- Post profile (square / round) and wall thickness (2.0–3.0mm)
- Surface finish: powder coat μm or HDG μm per ISO 1461
- Forklift pocket dimensions match your truck (typ. 220×85mm)
🛡️ 2. Compliance & Test Reports
- EN 1090 EXC2 weld certificate (welded base)
- AS 4084 load-test report (Australian markets)
- Mill test certificate (MTC) for steel
- ISO 9001 / ISO 14001 factory certificates
- Loaded stack-test photos / video (1.5× rated load)
📐 3. Sample Order Strategy
- Request 1–2 sample units before bulk PO (we ship via DHL/UPS air)
- Validate fold/unfold cycle ≥ 50× on your floor
- Confirm forklift pocket dimensions with your truck
- Test paint adhesion (cross-hatch tape per ASTM D3359)
💰 4. Payment & Incoterms
- T/T 30% deposit + 70% before B/L (standard)
- L/C at sight accepted ≥ USD 30,000
- Incoterms: FOB Shenzhen (default), CIF, DDP available
- OA 30–60 days for repeat customers after 3 successful POs
- Western Union accepted for sample orders ≤ USD 2,000
🚢 5. Logistics & Container Loading
- 40HQ container fits ~80 welded / ~180 detachable / ~280 foldable units
- Pre-folded packing for hinged variants — max density
- IPPC ISPM-15 heat-treated wood pallets included
- Container loading photo + video sent before sailing
- Lead time: 15–20 days standard; 25 days for HDG outdoor
🤝 6. After-Sales & Warranty
- 3-year structural warranty (5 years on HDG outdoor)
- Free replacement parts in 1st year for manufacturing defects
- Damaged-in-transit claim support with photo evidence
- Assembly drawing + fold-flat instruction video included
- Dedicated account manager (WhatsApp / Email / WeChat)
Everything Importers, Distributors & Warehouse Owners Ask About Stack Racks
Real questions from procurement managers, importers and warehouse owners during 18 months of stack-rack export quotes. Bookmark this — it answers ~95% of pre-order objections.
Q01. What is the typical lead time for stack racking?
15–20 days for standard welded and detachable units; 20–25 days for hinged foldable variants; 25 days for outdoor HDG configurations. Express 10-day production possible for repeat customers with stock components.
Q02. What is the MOQ (Minimum Order Quantity)?
Standard MOQ is 20 units per configuration. For first orders we accept 10 units mixed configurations to let distributors trial multiple variants. Sample 1–2 units shipped by DHL for paid evaluation.
Q03. How many stack racks fit in a 40HQ container?
~80 welded fixed units (full size), ~180 detachable-post units (flat-pack), or ~280 hinged foldable units (pre-folded). Pre-folding is the #1 logistics win — it saves 30–60% per shipment vs welded competitors.
Q04. Can stack racks be used outdoors?
Yes — order the outdoor HDG variant: hot-dip galvanised 80–120 μm per ISO 1461, Q345B low-temp impact steel, sealed cap plugs to prevent post-pocket water intrusion. Survives 10+ years in coastal and freeze-thaw climates with 5-year corrosion warranty.
Q05. How high can I stack stack racks loaded?
Standard rating is 4 high loaded. The bottom unit must carry the cumulative weight of all units above (4 × payload). We engineer 5-high stacks with heavy-duty posts on request — requires stamped engineering letter and 6m+ ceiling clearance.
Q06. Do stack racks need a building permit?
Generally no — stack racks are classified as portable storage equipment, not permanent structures, in most jurisdictions (US, EU, UK, ANZ, MENA, LATAM). Always check local code, especially in seismic zones (California, Japan, Chile) where any storage above 2.4m may need engineering review.
Q07. Do stack racks need to be anchored to the floor?
No floor anchors required — this is the core advantage vs selective pallet racking. The wide footprint, heavy base channel and self-aligning post sockets give inherent stability for stacks of 4 high. Outdoor applications in high-wind zones may use ballast or tie-down straps.
Q08. Can I use a standard forklift to move stack racks?
Yes — standard fork pockets (220×85mm at 760mm centres) accept any class III/IV counterbalance or reach truck. Lift the whole loaded stack to relocate, or move individual units. Optional wheels available for indoor manual movement.
Q09. Are stack racks reusable for rental fleets?
Yes — this is one of the largest use cases. Our hinged foldable units are cycle-tested 200× fold-unfold without deformation; powder coat survives 5+ years of rental abuse. Optional barcode tag mount included for fleet tracking.
Q10. What standards do AME Rack stack racks comply with?
EN 1090-2 EXC2 (steel structure welding), AS 4084 (Australian racking standard), FEM 10.2.02 guidance, ISO 1461 (HDG coating), ISO 9001 / 14001 factory certification. FEA load report stamped by chartered engineer issued free with every project.
Q11. How does AME Rack price compare to local suppliers?
Stack racks are weight-driven products — our FOB Shenzhen pricing typically lands at 50–65% of EU/US/AU manufacturer pricing, even after shipping and 5–10% import duty. The economics work best for 1×40HQ or larger orders.
Q12. What is the warranty?
3-year structural warranty on standard units; 5-year warranty on HDG outdoor units. Covers manufacturing defects (weld failure, paint adhesion, dimensional defect). Excludes user damage from over-load, forklift impact or out-of-spec stacking.
Q13. Do you offer OEM / private label?
Yes — minimum 20 units per configuration. We can apply your logo (silkscreen or sticker), custom colour (RAL match), branded packaging and white-label test reports. Used by ~30 rental-equipment brands across EU and AU.
Q14. Can stack racks handle cold storage / freezer use?
Yes — order the cold-storage variant with Q345B low-temp impact steel (Charpy V-notch tested at -30°C). HDG finish recommended to handle condensation cycle in freezer doorways. Operating range -30°C to +60°C.
Q15. What payment terms do you accept?
Standard: 30% T/T deposit + 70% before B/L. L/C at sight for orders ≥ USD 30,000. Western Union for samples ≤ USD 2,000. After 3 successful POs, repeat customers can negotiate OA 30–60 days subject to credit check.
Get a Stack Racking Quote in 4 Hours — From the Factory That Ships 65+ Countries
Send your spec (units / capacity / stack height / connection type / finish / destination port) — we reply within 4 hours during Shenzhen business day with FOB pricing, container loading plan, and lead time. Free engineering review. Free FEA load report. Free packing list.
📩 3 Ways to Start the Conversation
📧 Lily@amerack.com
💬 WhatsApp / Phone: +86 188 2453 7792
🏭 Dongguan, Guangdong, China · MON–SAT 09:00–18:00 (GMT+8)
