□250×150×8 □250×150×8 Rectangular tube (GB/T 6728) RHS 250 150 8 20 5924 46.5008 48849550 390796 482099 90.8102 22189590 295861 339516 61.2039 50504492 0.7656 0.7154 Pending verification – nominal dimensions entered by the application developer GB/T 6728:2017 Cold formed steel hollow sections for general structure 2017 2017 2026-10-12 UNVERIFIED Outer corner radius assumed as 2.5t (GB/T 6728 permits a range) for property calculation; confirm against GB/T 6728:2017 Cold formed steel hollow sections for general structure and the manufacturer catalogue. Typical grade: Q355B.