This reference identifies the Hybox 355 square hollow section (SHS) listed as 350x350x10. Use the data below when reviewing steel shape schedules, preparing drawings, or comparing hollow-section references.
The page records the section dimensions, corner radii, sectional area, and unit weight, along with the cited European standard reference. Confirm project requirements, material documentation, and design assumptions before using the section in engineering work.
Hybox 355 SHS 350x350x10
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 : 350x350x10
Depth : 350 mm
Width : 350 mm
Thickness : 10 mm
Outer Corner Radius : 25 mm
Inner Corner Radius : 15 mm
Sectional Area : 133 cm2
Unit Weight : 104.4 kg/m
How to read this SHS reference
The designation 350x350x10 describes a square hollow section with equal outside depth and width and a listed wall thickness. Because the section is square, its two principal geometric directions are represented by the same outside dimension.
Corner radii and section geometry
The listed outer and inner corner radii describe the rounded transitions between the flat faces of the tube. These details are relevant when checking CAD geometry, clearances, fabrication details, and section-property references. They should not be replaced with sharp corners when accurate detailing is required.
Sectional area and unit weight
The sectional area is a geometric property used in steel calculations and section comparisons. The listed unit weight supports material takeoff and weight-estimation work. These values are reference data; member design also depends on loading, restraint, connection details, material requirements, fabrication, and applicable design rules.
Standard reference
The source cites 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. Consult the applicable project specification and material documentation when verifying compliance.
Related steel reference topics
For broader context, connect this page with related references covering square hollow sections, rectangular hollow sections, steel section properties, structural steel tolerances, steel connections and detailing, and DWG resources for steel profiles.
Frequently asked questions
What does SHS mean?
SHS means square hollow section. It describes a hollow structural steel profile with equal outside width and depth.
What does 350x350x10 mean for this section?
It is the listed designation for the Hybox 355 SHS, identifying the outside dimensions and wall thickness recorded in the reference.
Why are the corner radii included?
Corner radii define the rounded tube corners and help users distinguish the actual section geometry from a simplified sharp-corner drawing.
What is EN 10219-2 used for in this reference?
The cited standard is associated with dimensions, tolerances, and sectional properties for cold-formed welded structural hollow sections. The source also identifies EN 10219-1 as covering technical delivery conditions.
Can the listed unit weight be used for a material takeoff?
Yes, the listed unit weight can support a preliminary material quantity or weight estimate. Confirm the final takeoff against the project specification, supplied material, joints, and fabrication requirements.
Does this page provide enough information for member design?
No. The reference provides selected section data, but design requires project-specific loading, support and restraint conditions, material verification, connection checks, and the applicable design standard.
