This reference page identifies the Hybox 355 square hollow section (SHS) with the designation 180x180x6. Use the source data below to check its listed dimensions, corner radii, sectional area, unit weight, and related CAD resource.
The designation is useful when coordinating steel schedules, fabrication drawings, connection details, and section-property references. For design work, confirm that the listed product, material condition, tolerances, and section properties match the project specification and the applicable engineering checks.
Hybox 355 SHS 180x180x6.0
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 : 180x180x6
Depth : 180 mm
Width : 180 mm
Thickness : 6 mm
Outer Corner Radius : 12 mm
Inner Corner Radius : 6 mm
Sectional Area : 40.8 cm2
Unit Weight : 32 kg/m
How to read the Hybox 355 SHS designation
SHS means square hollow section. In this designation, the first two dimensions describe the outside depth and width, while the final dimension identifies the wall thickness. The source listing provides these values separately, making it easier to compare the section with a steel schedule or CAD model.
Corner radii and fabrication context
The outer and inner corner radii describe the rounded corners formed during manufacture. They are important when a drawing, connection detail, cope, fitting, or digital model must represent the section accurately. Do not treat the outside dimensions as a sharp-corner geometry when checking clearances or preparing detailed fabrication information.
Sectional area and unit weight
The listed sectional area is a cross-sectional property, while the unit weight supports material takeoff and mass-estimation work. These values should be taken from the authoritative local table rather than recalculated from nominal dimensions, because the published section properties reflect the specified product geometry and tolerances.
Referenced European standard
The source refers to EN 10219-2:2006-04 for tolerances, dimensions, and sectional properties for cold-formed welded structural hollow sections made from non-alloy and fine grain steels. It also identifies EN 10219-1 as covering technical delivery conditions. Use the standard reference as a starting point for checking product documentation, while confirming the project’s governing requirements and edition.
CAD and drafting workflow
The downloadable DWG can support layout, detailing, and coordination workflows. Before using it for fabrication or analysis, check the model against the listed dimensions and corner radii, and confirm units, layer conventions, and the intended level of geometric detail. Related internal references could link readers to the site’s SHS terminology, hollow-section section properties, steel connection detailing, and CAD/DWG guidance.
Frequently asked questions
What does SHS mean?
SHS means square hollow section. It describes a hollow steel profile with square outside dimensions and rounded manufactured corners.
How should 180x180x6 be interpreted?
For this listing, the designation identifies the outside depth, outside width, and wall thickness. The source content gives the corresponding values in millimetres.
Why are the corner radii listed?
Corner radii help describe the actual section shape. They matter when checking clearances, modeling the profile, detailing connections, or coordinating fabrication drawings.
What does EN 10219-2 cover in this reference?
The cited standard is identified as covering tolerances, dimensions, and sectional properties for cold-formed welded structural hollow sections. The source also distinguishes EN 10219-1 as the standard covering technical delivery conditions.
What is the purpose of the sectional area and unit weight?
The sectional area is a cross-sectional reference property. The unit weight can be used for material takeoffs and mass estimates, subject to confirmation against the project’s approved product data.
Can the DWG be used directly for structural design?
The DWG is a drafting and coordination resource. It should be checked against the authoritative section data and must not replace engineering verification, product documentation, or project-specific design checks.
