This reference provides the identifying dimensions and published section data for the Hybox 355 square hollow section designated 180x180x12.5. Use it alongside related resources on structural steel shapes, section properties, and steel terminology when reviewing design or drafting information.
The original source data below remains the controlling reference for the listed dimensions, corner radii, sectional area, and unit weight. The accompanying explanation clarifies how to read the designation and how the standard and CAD reference fit into a practical workflow.
Hybox 355 SHS 180x180x12.5
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 : 180x180x12.5
Depth : 180 mm
Width : 180 mm
Thickness : 12.5 mm
Outer Corner Radius : 37.5 mm
Inner Corner Radius : 25 mm
Sectional Area : 77 cm2
Unit Weight : 60.4 kg/m
How to read the Hybox 355 SHS designation
SHS means square hollow section. The designation 180x180x12.5 identifies the nominal depth, width, and wall thickness listed in the reference data. Because the depth and width are the same, the section has a square outside profile.
The listed outer and inner corner radii describe the rounded transitions between the flat faces of the hollow section. These details are important when comparing published section properties, preparing connection details, or checking how a CAD profile represents the manufactured shape. They should not be replaced with sharp-corner assumptions without confirming the relevant design basis.
Using the published section data
The sectional area and unit weight are reported reference values for this specific section. They support material takeoff, drafting coordination, and preliminary comparison with other hollow sections. Final member design, connection design, fabrication, and loading checks require the applicable project criteria and engineering verification.
Standard and CAD reference
The source identifies EN 10219-2:2006-04 as the dimensional and sectional-property reference for cold-formed welded structural hollow sections made from non-alloy and fine grain steels. It also notes that EN 10219-1 addresses technical delivery conditions. Review the applicable project specification and current governing requirements before relying on a standard designation for procurement or design.
The linked DWG file can help with drafting and geometry coordination. Before incorporating it into a drawing, confirm the drawing units, profile orientation, layer conventions, and project-specific detailing requirements. Related pages on CAD/DWG resources and structural steel connections can provide useful drafting context.
Frequently asked questions
What does SHS mean?
SHS means square hollow section. It describes a hollow steel profile with a square outside form and rounded manufactured corners.
What does 180x180x12.5 represent?
For this reference, the designation identifies the listed depth, width, and wall thickness of the section. The source data provides the corresponding corner radii, sectional area, and unit weight.
What standard is associated with this Hybox 355 section?
The source refers to EN 10219-2:2006-04 for tolerances, dimensions, and sectional properties. It also identifies EN 10219-1 as the complementary reference for technical delivery conditions.
Can the DWG file be used directly for fabrication?
The DWG is a drafting reference for the section profile. Confirm its units, geometry, revision status, and project requirements before using it for fabrication or detailed engineering.
Does the published section data replace a structural design check?
No. The listed properties are reference data for the identified section. Member resistance, stability, connections, fabrication, and service requirements must be evaluated for the specific project.
