The Hybox 355 SHS 30x30x3 is a square hollow section with equal outside depth and width and a 3 mm wall thickness. This reference brings together the source dimensions, corner radii, sectional area, unit weight, applicable standard context, and a downloadable DWG file for drafting workflows.
Use the listed properties as a quick reference when reviewing structural steel shapes, preparing details, or comparing hollow-section options. Confirm material, loading, connection, fabrication, and corrosion requirements through the applicable project design process before specifying the section.
Hybox 355 SHS 30x30x3
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 : 30x30x3
Depth : 30 mm
Width : 30 mm
Thickness : 3 mm
Outer Corner Radius : 6 mm
Inner Corner Radius : 3 mm
Sectional Area : 3.01 cm2
Unit Weight : 2.4 kg/m
How to read the Hybox 355 SHS reference
SHS means square hollow section. The designation 30x30x3 identifies the nominal outside depth, nominal outside width, and wall thickness shown in the source data. Because the outside dimensions are equal, the section has the basic geometry associated with a square profile.
Dimensions and corner geometry
The reference lists the section depth, width, thickness, outer corner radius, and inner corner radius separately. Corner radii are important when interpreting a CAD profile, checking clearances, or detailing a connection around the hollow section. They also explain why the section outline is rounded at the corners rather than formed from four perfectly sharp external corners.
Sectional properties and mass reference
The listed sectional area is useful for understanding the amount of steel represented by the profile and for engineering calculations that use area. The unit weight provides a mass-per-length reference for quantity takeoffs and handling estimates. These values should remain tied to the authoritative local table and should not be substituted with estimates from a different section series or manufacturing tolerance basis.
Standard and CAD context
The source identifies EN 10219-2 as the reference for tolerances, dimensions, and sectional properties for cold-formed welded structural hollow sections made from non-alloy and fine grain steels. It also notes that EN 10219-1 covers technical delivery conditions. The linked DWG can support drafting and layout work, but users should verify scale, units, layer conventions, and project-specific detailing requirements before using it in issued documentation.
For related research, connect this reference with internal resources on square hollow sections, section properties, steel terminology, and structural steel connections.
Frequently asked questions
What does SHS mean?
SHS means square hollow section. It describes a hollow steel profile with nominally equal outside depth and width.
What does 30x30x3 identify?
In this reference, 30x30x3 identifies the nominal outside depth, nominal outside width, and wall thickness listed for the section.
Why are the corner radii listed separately?
The outer and inner corner radii describe the rounded geometry of the section corners. They are useful when checking the downloaded profile, clearances, fit-up, and connection details.
What does EN 10219-2 cover in this reference?
The source identifies EN 10219-2 as covering tolerances, dimensions, and sectional properties for cold-formed welded structural hollow sections made from non-alloy and fine grain steels. The source separately identifies EN 10219-1 with technical delivery conditions.
Can the DWG be used directly for fabrication?
The DWG is a drafting reference and should be checked for units, scale, geometry, and project requirements before it is used in fabrication or issued design documentation.
Are the listed properties enough for structural design?
No. Design also requires verification of material requirements, loads, stability, connections, fabrication, and the governing project rules. The listed dimensions and properties should be used together with qualified engineering review.
