Specifies rails for permanent ways; updated to SI units in 1995. JIS E 1101:2001
JIS E 1101 is the Japanese Industrial Standard for . Established by the Japanese Industrial Standards Committee (JISC), it provides the benchmark for the manufacturing, dimensions, and material properties of rails. Scope: Covers heavy-duty rails and standard transit rails. jis e 1101 pdf
One of the most widely used rails for mainline and urban transit, weighing 60 (60kg rail): A heavy-duty rail weighing , often used for high-speed lines or heavy freight. 2. Chemical Composition Specifies rails for permanent ways; updated to SI