□120×120×5 □120×120×5 Square tube (GB/T 6728) RHS 120 120 5 12.5 2214 17.3794 4776128 79602 94139 46.4468 4776128 79602 94139 46.4468 7815429 0.4585 0.4271 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: Q235B.