Export warehouse cages mostly go by sea. With the container's high heat and humidity and its long sway at sea, packaging must solve two problems at once: rust prevention and securing. Bare or film-wrapped packaging built for domestic transport, if moved straight to export, usually arrives with widespread white rust and deformation.
For rust prevention: before dispatch the cage should be dried of surface moisture, then key inner contact surfaces should be sprayed with VCI vapor-phase rust-preventive oil or wrapped in anti-rust paper, and the whole cage over-wrapped in PE stretch film. For container sea freight, put desiccant inside the container — 5 to 8 silica gel bags of 500 g each per 20-ft container — to control interior humidity.
For securing: folded cages should be unitized into pallet packs, with a fixed count per pack (e.g. 10 cages per pack), strapped with steel bands in three places and resting on a solid wooden pallet. Fumigated pallets must carry the IPPC mark, because destination countries impose quarantine rules on wooden packaging; uncertified pallets are returned or destroyed on arrival.
When loading the container, arrange by weight: heavier cages toward the door, lighter ones deeper inside, and separate layers with corrugated paper or cushioning pads so mesh panels don't rub and chip paint off each other. Fill gaps inside the container with inflatable Dunnage bags to stop whole packs from shifting and colliding during transit.
Shipping marks and packing lists must correspond pack by pack, marking gross weight, net weight, pack number and destination port. Nanjing Tongnuo Warehouse Equipment Manufacturing Co., Ltd. can tailor rust-preventive packaging and fumigated pallets for export orders, and provides on-site loading photos for customer verification.