The Hybox 355 SHS 120x120x5 is a cold-formed welded square hollow section reference for structural steel detailing and design research. This page brings together the listed section dimensions, corner radii, sectional area, unit weight, applicable standard context, and a downloadable DWG resource.
Use the dimensional data below alongside your project specifications, connection details, and verified design calculations. For broader terminology, compare this section with other square hollow sections and review the site’s guidance on steel section properties.
Hybox 355 SHS 120x120x5
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 : 120x120x5
Depth : 120 mm
Width : 120 mm
Thickness : 5 mm
Outer Corner Radius : 10 mm
Inner Corner Radius : 5 mm
Sectional Area : 22.4 cm2
Unit Weight : 17.6 kg/m
Understanding the Hybox 355 SHS entry
SHS means square hollow section. Its closed square profile is defined by the outside depth and width, wall thickness, and the radiused corners shown in the reference data. The corner radii are important when preparing accurate drawings, checking clearances, or developing connection details.
How to use the listed properties
The sectional area and unit weight provide reference information for quantity takeoffs, member schedules, and coordination with structural calculations. They should not be treated as a substitute for project-specific verification, including material requirements, loading, buckling checks, connection design, and fabrication considerations.
The entry refers to EN 10219-2 for dimensional and sectional-property information and distinguishes it from the related technical delivery requirements covered by EN 10219-1. Always confirm the required standard, material designation, tolerances, and delivery documentation for the application.
Drawing and detailing workflow
The linked DWG can support drafting and coordination workflows. Before incorporating it into issued drawings, check units, layer conventions, origin, scale, file integrity, and whether the represented profile matches the project’s procurement and fabrication requirements. Related resources on CAD and DWG references, steel connections, and structural detailing can help place the section in a broader workflow.
Reference summary
- Profile: Hybox 355 square hollow section.
- Nominal designation: 120x120x5.
- Geometry covered: depth, width, wall thickness, and outer and inner corner radii.
- Properties covered: sectional area and unit weight.
- Resource: downloadable DWG reference supplied with the entry.
Frequently asked questions
What does SHS mean?
SHS means square hollow section. It describes a hollow structural profile with a square outside form and radiused corners.
What does 120x120x5 identify?
In this entry, the designation identifies the listed outside depth, outside width, and wall thickness. The source data gives each of those dimensions separately for clarity.
Why are the corner radii listed?
Corner radii affect the actual profile geometry and can matter when checking clearances, detailing connections, modeling the section, or creating fabrication drawings.
What is the role of EN 10219-2 in this reference?
The page identifies EN 10219-2 as the referenced standard for dimensions, tolerances, and sectional properties of the relevant cold-formed welded structural hollow sections. Material delivery requirements should be checked separately against the applicable project documentation.
Can the DWG be used directly for construction?
The DWG is a drafting reference. Review its units, geometry, and project compatibility before using it in design or issued construction documentation, and obtain engineering approval where required.
