This reference covers the Hybox 355 square hollow section identified as 300x300x8. Use the listed dimensions, corner radii, sectional area, and unit weight when reviewing section geometry or coordinating structural steel documentation.
The page also identifies the relevant EN 10219-2 reference and provides access to a DWG file. For related guidance, connect this reference with internal resources on square hollow sections, sectional properties, steel terminology, and CAD/DWG details.
Hybox 355 SHS 300x300x8
Hybox 355 Square Hollow Sections
refer to : EN 10219-2:2006-04
the European standard that specifies tolerances, dimensions, and sectional properties for cold-formed welded structural hollow sections made of non-alloy and fine grain steels. It complements EN 10219-1, which covers technical delivery conditions.
Dimension : 300x300x8
Depth : 300 mm
Width : 300 mm
Thickness : 8 mm
Outer Corner Radius : 20 mm
Inner Corner Radius : 12 mm
Sectional Area : 91.2 cm2
Unit Weight : 71.6 kg/m
How to read this SHS reference
SHS means square hollow section. The 300x300x8 designation identifies the listed section dimensions: depth, width, and wall thickness. The source content records each of these values separately so they can be checked during drafting, specification review, and model coordination.
Corner radii and section geometry
The outer and inner corner radii describe the rounded transitions at the corners of the hollow section. These values are part of the reported section geometry and should be considered when a drawing, connection detail, or analytical model depends on the actual section profile rather than a simplified sharp-corner representation.
Sectional area and unit weight
The listed sectional area and unit weight are reference properties for this specific section entry. Keep their units visible when transferring the information into schedules, calculations, or material documentation. They should not be substituted with values from a different SHS size or product designation.
EN 10219-2 reference
The source identifies EN 10219-2:2006-04 as the dimensional and tolerance reference for cold-formed welded structural hollow sections made from non-alloy and fine grain steels. It also notes the relationship with EN 10219-1, which addresses technical delivery conditions. Consult the applicable project specification and current engineering requirements before using a standard reference for procurement or design decisions.
DWG download and drafting use
The associated DWG resource can support drawing coordination and CAD workflows. Check the downloaded geometry against the authoritative values on this page and maintain the section designation when placing it in a model, framing plan, connection detail, or material schedule.
Frequently asked questions
What does SHS mean?
SHS means square hollow section. It describes a hollow structural profile with a square outside form and rounded corners as represented by the listed corner radii.
What are the listed dimensions for this Hybox 355 section?
The reference identifies the section as 300x300x8 and separately lists its depth, width, and thickness. Use the source values directly when checking drawings or schedules.
Why are both outer and inner corner radii provided?
They describe the profile transitions on the outside and inside of the section corners. This geometry can matter when coordinating accurate CAD details or reviewing section properties.
What information is provided besides dimensions?
The page includes the outer and inner corner radii, sectional area, unit weight, the EN 10219-2 reference, and a DWG download resource.
Does this page provide a complete structural design check?
No. It is a section reference. Design resistance, connection behavior, stability, loading, material verification, and project-specific compliance require separate engineering review.
