This reference page covers the Hybox 355 square hollow section identified as 180x180x10. It brings together the source dimensions, corner-radius information, sectional area, unit weight, applicable standard reference, and a downloadable DWG file for drafting and engineering review.
Use the dimensional data below alongside the project specification, connection details, and verified design checks. The listed section properties are reference values for this profile and should not be treated as a substitute for project-specific engineering verification.
Hybox 355 SHS 180x180x10
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 : 180x180x10
Depth : 180 mm
Width : 180 mm
Thickness : 10 mm
Outer Corner Radius : 25 mm
Inner Corner Radius : 15 mm
Sectional Area : 64.6 cm2
Unit Weight : 50.7 kg/m
Understanding the Hybox 355 SHS designation
SHS means square hollow section: a closed steel profile with equal outside depth and width. The 180x180x10 designation identifies the nominal outside dimensions and wall thickness shown in the source data. The profile also includes defined outer and inner corner radii, which affect how the section is represented in drawings and how connected details are developed.
How to use the reference data
The listed depth, width, thickness, corner radii, sectional area, and unit weight support common reference tasks such as preliminary member identification, quantity review, fabrication detailing, and CAD model preparation. For design work, review the section properties together with the relevant loading, restraint, connection, corrosion allowance, fabrication requirements, and governing project specification.
Standard and delivery context
The source refers to EN 10219-2:2006-04, which addresses dimensional and sectional-property information for cold-formed welded structural hollow sections. The source also distinguishes this from EN 10219-1, which covers technical delivery conditions. Check the project documentation to confirm which material, manufacturing, inspection, and documentation requirements apply.
CAD download
The linked DWG provides a practical starting point for drafting and coordination. Before issuing a drawing, confirm units, layer conventions, insertion point, section orientation, corner geometry, and any fabrication-specific adjustments in the CAD environment.
Related reference topics
This page can be used alongside reference material on square hollow sections, rectangular hollow sections, steel section properties, structural steel connections, and CAD detailing for steelwork. These related topics help distinguish profile selection, property lookup, and connection design tasks.
Frequently asked questions
What does SHS mean?
SHS stands for square hollow section. It describes a closed, square-profile structural steel section with equal nominal outside dimensions.
What does 180x180x10 identify?
It identifies the nominal depth, width, and wall thickness recorded for this Hybox 355 profile. Refer to the source values on this page for the complete dimensional and property data.
Which standard is referenced for this section?
The source references EN 10219-2:2006-04 for dimensional tolerances, dimensions, and sectional properties, and notes the relationship with EN 10219-1 for technical delivery conditions.
What are the corner radii used for?
The outer and inner corner radii describe the rounded transitions between the faces of the hollow section. They are important when preparing accurate CAD geometry, checking clearances, and developing connection or fabrication details.
Can the DWG be used directly for fabrication?
The DWG is a drafting reference. Verify its units, geometry, project conventions, and fabrication requirements before using it in an issued drawing or manufacturing package.
Is the listed unit weight sufficient for design?
The unit weight is useful for reference and quantity calculations, but project design should also consider the complete loading model, material requirements, connections, and engineering checks.
