The Hybox 355 CHS 48.3×4 is a circular hollow section (CHS) reference for structural steel detailing and preliminary section comparison. This page brings together the profile dimensions, sectional area, unit weight, governing standard reference, and an available DWG file.
Use the values below as the authoritative local reference for this profile. For design work, connect the section data with the project steel grade, loading, connection details, corrosion requirements, and applicable design checks.
Hybox 355 CHS 48.3×4
Hybox 355 Circular 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.
Diameter : 48.3 mm
Thickness : 4 mm
Sectional Area : 5.57 cm2
Unit Weight : 4.4 kg/m
How to read this CHS reference
CHS describes a steel section with a circular outside form and a hollow interior. The profile designation combines the Hybox 355 product family with the circular hollow section size shown in the title. Diameter and wall thickness describe the section geometry, while sectional area and unit weight support material takeoff, detailing, and comparison with other steel shapes.
Standard reference
The source content refers to EN 10219-2, which addresses dimensions, tolerances, and sectional properties for cold-formed welded structural hollow sections. It works alongside EN 10219-1, which covers technical delivery conditions. When using this reference in a project, confirm that the applicable contract documents and project specifications identify the required standard and product requirements.
Design and detailing context
A CHS can require different connection and fabrication considerations from open sections. End connections, gusset plates, branch connections, weld access, fit-up, local wall behavior, and detailing clearances should be reviewed by the responsible engineer. The listed section properties are useful reference inputs, but they do not replace member resistance, stability, connection, or fabrication checks.
CAD download
A DWG download is provided with this profile for drafting workflows. Check the downloaded geometry against the authoritative dimensions on this page before incorporating it into production drawings, fabrication documents, or coordination models.
Frequently asked questions
What does CHS mean?
CHS means circular hollow section. It identifies a hollow steel profile with a circular cross-section.
What information is listed for this Hybox profile?
The reference lists the diameter, wall thickness, sectional area, unit weight, and the EN 10219-2 standard reference for the Hybox 355 CHS 48.3×4 profile.
Does the listed unit weight replace a project material takeoff?
No. It is a section reference value. A project takeoff should also account for the specified product, cut lengths, joints, fittings, coatings, fabrication allowances, and applicable tolerances.
Can the DWG file be used directly for fabrication?
The DWG is intended as a drafting reference. Verify its geometry, units, layer content, and project-specific requirements before using it for fabrication or issued design documentation.
