Through the 1960s, the International Organization for Standardization issued a series of recommendations fixing the external dimensions, corner-fitting design, and stacking strength of intermodal freight containers. Agreement on common sizes, later centered on the 20-foot and 40-foot units, allowed containers built by different manufacturers and shipped by competing carriers to be handled by the same cranes, chassis, and railcars anywhere in the world. Without this standardization, the efficiency gains of containerization would have been confined to individual shipping lines rather than the entire industry. The standards were refined repeatedly over subsequent decades as container use expanded.
Relevance to Trade History
Common container standards turned a single company's innovation into a universal global logistics system, underpinning the modern intermodal supply chain.
Read the full story in our article Container Shipping and the Modern Supply Chain.
Source: International Organization for Standardization historical archive. See our Sources & Methodology page for how we select and verify references.