Designed and built for secure storage and transportation, the 40' shipping container is weatherproof, durable, and easily accessible from locked cargo doors on one end. 40ft shipping containers standard features: Single end corrugated steel cargo doors High security lock box (new models only) Two-way forklift pockets, tested to 16,000 lbs./ 44 squ. in.(new models only) 1 ⅛ thick marine plywood floors Wall tie down steel lashing rings, 4,000 lbs. cap. each (40 total) tested at 6,000 lbs. Corner castings all corners (8 total)