Table of Contents
How to Prepare a Crate Shipment
Crating is one of the most secure and reliable methods for both domestic and international shipping, especially when transporting fragile, high-value, or oversized items. Unlike standard boxes, wooden crates provide a rigid structure that protects cargo from impact, compression, and handling damage during transit. This is particularly important for international shipments, where goods may go through multiple transfers, long transit times, and customs inspections.
Choose the Right Crate for Shipping
When preparing a crate shipment, selecting the correct crate is the first and most important step. A strong and properly sized crate protects your goods and ensures safe transport.
Use solid wood crates or plywood crates for heavy or fragile items
For international shipping, use ISPM-15 certified (heat-treated) wood
Choose the right size to minimize empty space inside
Recommended crate sizes (based on shipment type):
Small crate: up to 48 × 40 × 36 inches (121 × 102 × 91 cm)
Medium crate: up to 60 × 48 × 48 inches (152 × 122 × 122 cm)
Large crate: up to 72 × 48 × 60 inches (183 × 122 × 152 cm)
Custom crates: for oversized items (furniture, sculptures, machinery)
Keep at least 2–4 inches (5–10 cm) space on each side for padding
Ensure the crate has a pallet-style base (forklift accessible)
Avoid weak or damaged wood
Prepare and Wrap the Items Properly
Before placing items into the crate, proper internal protection is critical.
Wrap items with foam, bubble wrap, or blankets
Protect fragile areas like corners, edges, and surfaces
Use anti-scratch and moisture protection if needed
Disassemble items (like table legs, frames) when possible
For high-value items, consider custom foam inserts
Secure Items Inside the Crate
Items must not move during transit — this is one of the most important steps.
Use blocking and bracing (wood supports) inside the crate
Fill empty spaces with foam, padding, or air cushions
Use straps or tie-downs for heavy items
Ensure zero movement when shaking the crate
For machinery, consider bolting to the base
Reinforce and Seal the Crate
The crate structure must be strong enough to handle long-distance transport.
Use screws or nails (not just staples) to secure panels
Reinforce edges with metal brackets if needed
Seal all sides tightly
For international shipping, ensure the crate is fully enclosed
Optional: use water-resistant lining or wrap
Labeling and Documentation
Clear labeling ensures smooth handling and customs clearance.
Attach shipping labels on at least 2 sides
Add handling labels:
“Fragile”
“This Side Up”
“Do Not Stack” (if needed)
For international shipments:
Attach commercial invoice + packing list
Include HS code and item description
Place documents in a waterproof pouch
Final Inspection and Pickup Preparation
Before shipment, do a final check to avoid delays or damage.
Verify weight and dimensions (important for billing)
Check crate stability (no loose panels or movement)
Ensure forklift access on all sides if required
Take photos for records and insurance
Confirm pickup details and carrier requirements
More Tips:
Understanding ISPM-15 & International Wood Regulations
If you are shipping internationally using solid wood crates, your packaging must comply with the International Standards for Phytosanitary Measures No. 15 (ISPM-15). Designed to prevent the spread of forest pests, this regulation requires all raw wood packaging thicker than 6mm to be debarked, heat-treated (to a core temperature of 56°C for 30 minutes), or fumigated, and officially stamped.
What is exempt? Alternative manufactured wood materials like plywood, OSB (Oriented Strand Board), and plastic pallets are exempt from ISPM-15 regulations.
The Risk: Non-compliant wood packaging can lead to your entire shipment being rejected, quarantined, or destroyed at customs, resulting in major delays and hefty fines. Check the USDA APHIS Guidelines to ensure your materials are fully accredited before booking your pickup.
Advanced Structural Integrity: 3-Way Corners & Diagonal Bracing
When constructing or inspecting your shipping crate, the assembly method is just as important as the wood quality. Standard butt joints can fail under heavy loads or the vibrations of ocean and air freight.
3-Way Corner Construction: Always build crate corners using a three-way configuration. This ensures that fasteners (screws or ring-shank nails) are driven into the side grain of the adjacent wood pieces, preventing the joints from splitting or pulling apart under pressure.
Diagonal Bracing: For large or heavy-duty crates, add diagonal braces across each plywood panel. This simple addition dramatically improves the crate’s resistance to twisting, shear forces, and lateral impacts during forklift handling. Refer to professional shipping standards like the FedEx Freight Packaging Guidelines for detailed diagrams on structural support.
FAQ
While both are used to secure cargo, they serve different purposes. A pallet is a flat, open platform (usually made of wood or plastic) designed to elevate goods so they can be easily moved by forklifts or pallet jacks. A crate is a fully enclosed, heavy-duty wooden box with four walls, a roof, and a base. Crates provide maximum physical protection from impact, moisture, and theft, making them the preferred choice for fragile, high-value, or loose items, whereas pallets are best for stacked, uniform boxes.
No. Under international customs regulations, manufactured wood materials such as plywood, OSB (Oriented Strand Board), particleboard, and corrugated paperboard are exempt from ISPM-15 heat-treatment and stamping requirements. This is because the high heat and pressure used during their manufacturing process naturally destroy any wood-boring pests. Only raw, solid wood components (like the structural framing or base runners of your crate) must carry the official ISPM-15 stamp.
Internal movement is the primary cause of transit damage. To guarantee zero movement:
Block and Brace: Nail or screw wooden blocks to the crate floor directly against the base of your item to lock it in place.
Fill Void Spaces: Pack empty spaces tightly using heavy-duty foam, air pillows, or crumpled kraft paper.
Tie-Downs: For heavy machinery or wheeled items, use heavy-duty polyester straps or ratchet tie-downs anchored to the crate’s internal frame.
As a industry gold standard, you should leave a cushion zone of 2 to 4 inches (5 to 10 cm) of space on all sides (top, bottom, and walls) between your cargo and the inner walls of the crate. This space must be filled entirely with shock-absorbing materials like bubble wrap, custom-molded foam inserts, or packing blankets to absorb external impacts during rough handling.
Long-distance shipping—especially ocean freight—exposes crates to extreme humidity and temperature drops, causing condensation (“container rain”). To prevent rust, wrap metal parts in VCI (Volatile Corrosion Inhibitor) film or paper, which releases protective vapors to prevent oxidation. Additionally, place industrial-grade silica gel desiccant packets inside the sealed crate to actively absorb ambient moisture.
You should use deck screws or ring-shank nails instead of standard smooth nails or staples. Smooth nails can easily back out and loosen due to the continuous vibrations of ocean vessels, cargo planes, or trucks. Screws provide superior mechanical grip, keep the joint securely locked under heavy pressure, and make it much easier for the consignee to safely open the crate upon delivery without damaging the contents.