The Hybox 355 SHS 400x400x8 is a square hollow section reference entry for a cold-formed welded structural steel profile. This page brings together the source dimensions, corner radii, sectional area, unit weight, standard reference, and downloadable DWG file.
Use the designation as a quick identification aid, then consult the listed dimensions and properties for drafting, takeoff, comparison, and preliminary reference work. Design verification should use the applicable project requirements and the governing technical documentation.
Hybox 355 SHS 400x400x8
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 : 400x400x8
Depth : 400 mm
Width : 400 mm
Thickness : 8 mm
Outer Corner Radius : 20 mm
Inner Corner Radius : 12 mm
Sectional Area : 123 cm2
Unit Weight : 96.6 kg/m
How to read the SHS designation
SHS means square hollow section. In this entry, 400x400x8 identifies the listed outside depth, outside width, and wall thickness. The corner radii are reported separately because the corners are not represented by a sharp-corner assumption.
Dimensions and reference properties
The source data gives a depth of 400 mm, a width of 400 mm, and a thickness of 8 mm. It also lists an outer corner radius of 20 mm and an inner corner radius of 12 mm. These values describe the section geometry used by the reference entry.
The listed sectional area is 123 cm2, while the unit weight is 96.6 kg/m. Keep these properties distinct: sectional area describes the material cross-section, whereas unit weight describes the mass associated with each metre of section.
Standard and CAD reference
The entry refers to EN 10219-2:2006-04 for dimensions, tolerances, and sectional properties of cold-formed welded structural hollow sections. It also identifies EN 10219-1 as covering technical delivery conditions. Review the project specification and applicable documentation before using a standard reference for procurement or design.
The linked DWG file can support drafting and layout workflows. Before placing the profile in a production drawing, check the CAD geometry against the authoritative dimensions and the requirements of the project.
Frequently asked questions
What does SHS mean?
SHS means square hollow section. It describes a hollow structural profile with a square outside form and corner radii identified separately in the reference data.
What do the numbers 400x400x8 represent?
For this entry, the designation corresponds to the listed depth, width, and wall thickness: 400 mm, 400 mm, and 8 mm respectively.
Why are the corner radii listed?
Corner radii define the rounded transitions between the flat faces of the section. They are part of the reported geometry and should not be replaced with a sharp-corner assumption when accurate drafting or calculation is required.
Where can I get the CAD file?
A DWG download is provided with the source entry. Check the downloaded geometry against the page dimensions before using it in a fabrication, detailing, or coordination workflow.
Is the listed unit weight the same as sectional area?
No. Sectional area describes the cross-sectional material area, while unit weight expresses the listed mass per metre. Both properties are provided for different reference purposes.
