STK (carbon steel tube for general structures)

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Outside diameter [mm]	t [mm]	Mass [kg/m]	Cross-sectional area [x10² mm²]	Second moment of area [x10⁴ mm⁴]	Section modulus [x10³ mm³]	Radius of gyration [mm]

Notes

Further reading
- JIS G 3444
- The dimensions in the table are those of size 13A (reference: Kashiwagi Kokan website)