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Rectangular and Square Hollow Section (SHS, RHS) corner radius dimensions

Updated: Apr 24, 2020

Radius dimensions for hot and cold rolled rectangular (RHS) and square hollow sections tubes (SHS) are hidden away in their respective BS EN dimension and tolerance standards. We've extracted them here for your (and our!) convenience:

Hot formed SHS and RHS:

  • External radius = 1.5t

  • Internal radius = 1.0t (where t = wall thickness)


Cold formed SHS and RHS:

  • External radius:

  • Internal radius:



BS EN 10210-2: 2006  Tolerances, dimensions and sectional properties (Hot finished structural hollow sections)

BS EN 10219-2: 2006  Tolerances and sectional properties (Cold formed welded structural sections).


Smartbuild Engineering are structural engineers specialising in steel connection design. See more of what we do here.

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