Hybox 355 SHS 80x80x3.5 is a cold-formed welded square hollow section reference for engineers, detailers, fabricators, and CAD users. This page brings together the published section dimensions, corner radii, sectional area, unit weight, applicable standard reference, and a DWG resource.
Use the source values below for preliminary reference and drafting coordination. Final member selection, resistance checks, connection detailing, corrosion allowances, and fabrication requirements should be verified against the project specification and the applicable design rules.
Hybox 355 SHS 80x80x3.5
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 : 80x80x3.5
Depth : 80 mm
Width : 80 mm
Thickness : 3.5 mm
Outer Corner Radius : 7 mm
Inner Corner Radius : 3.5 mm
Sectional Area : 10.4 cm2
Unit Weight : 8.2 kg/m
How to read this SHS reference
SHS means square hollow section. The designation 80x80x3.5 identifies the nominal outside depth, nominal outside width, and wall thickness in that order. The section is square in profile, while the listed outer and inner corner radii describe the rounded transitions between its flat faces.
Why the corner radii matter
Corner geometry affects how the section is represented in drawings and how its material is distributed around the perimeter. It also matters when coordinating fittings, end preparations, weld details, and connections. Use the stated radii rather than assuming sharp corners in CAD or fabrication documentation.
Using the listed section data
The sectional area is useful when checking material quantity and when it is required by a design calculation. The unit weight supports estimating, handling, and mass take-offs. These values should be read together with the dimensional data; they do not, by themselves, establish a member’s structural resistance or design suitability.
Standard and CAD reference
The page identifies EN 10219-2:2006-04 for dimensions, tolerances, and sectional properties of cold-formed welded structural hollow sections. It also notes the relationship with EN 10219-1, which addresses technical delivery conditions. For drafting workflows, the downloadable DWG can help with geometry coordination, but the drawing should be checked against the project tolerances and fabrication requirements before release.
Related reference topics
- Square hollow section terminology and designation conventions
- Structural hollow section dimensions and tolerances
- Steel section properties for preliminary calculations
- Hollow-section connections and detailing
- CAD and DWG resources for structural steel drafting
Frequently asked questions
What does SHS mean?
SHS means square hollow section. It describes a hollow structural profile with nominally square outside dimensions.
What does 80x80x3.5 describe?
It identifies the nominal outside depth, nominal outside width, and wall thickness in that sequence, as listed in the source data.
Why are outer and inner corner radii listed?
The radii define the rounded corners of the hollow section. They are relevant to accurate CAD geometry, fabrication details, connection coordination, and calculations that use the section shape.
Which standard is referenced for this section?
The source references EN 10219-2:2006-04 for dimensions, tolerances, and sectional properties, and identifies EN 10219-1 as covering technical delivery conditions.
Can the DWG be used directly for fabrication?
The DWG is a drafting reference and should be reviewed against the project specification, fabrication requirements, and verified section data before it is used for production documentation.
