This reference entry covers the Hybox 355 square hollow section (SHS) identified as 300x300x10. Use the listed dimensions and section data when checking a drawing, comparing hollow-section options, or preparing a preliminary member schedule.
The page also identifies the relevant EN 10219 reference and provides a DWG download for drafting workflows. Confirm the project specification, material documentation, connection details, and design assumptions before using the section in engineering work.
Hybox 355 SHS 300x300x10
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 : 300x300x10
Depth : 300 mm
Width : 300 mm
Thickness : 10 mm
Outer Corner Radius : 25 mm
Inner Corner Radius : 15 mm
Sectional Area : 113 cm2
Unit Weight : 88.7 kg/m
How to read this SHS reference
SHS describes a square hollow structural section with a closed cross-section. The designation 300x300x10 identifies the listed outside depth, outside width, and wall thickness. The entry also records the outer and inner corner radii, which are important when modeling the profile accurately or checking clearances at corners.
The sectional area is useful for area-based calculations and for interpreting the listed unit weight during material takeoffs. These values should be taken from the source data on this page rather than estimated from nominal dimensions, because corner geometry and manufacturing tolerances affect the section.
Standard and drafting context
The reference points to 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 related research, link this page to the site’s resources on structural hollow sections, section properties, steel tolerances, and steel connection detailing.
The downloadable DWG can support layout and detailing work. Before issuing a drawing, verify the profile orientation, corner representation, units, layer conventions, and any project-specific fabrication requirements.
Design-use reminder
Dimensions and tabulated properties are reference data, not a complete design check. Member resistance, stability, local behavior, connection performance, corrosion protection, fabrication, and applicable project requirements must be evaluated by a qualified engineer using the governing design basis.
Frequently asked questions
What does SHS mean?
SHS means square hollow section. It is a closed structural steel profile with square outside dimensions and a hollow interior.
What does 300x300x10 mean in this entry?
In this reference, the designation identifies a listed depth of 300 mm, width of 300 mm, and thickness of 10 mm.
Why are the corner radii included?
Corner radii describe the transition between the flat faces of the section. They help produce a more accurate CAD model and support clearance, fit-up, and detailing checks.
Which standard is referenced?
The entry references EN 10219-2:2006-04 and notes that EN 10219-1 covers technical delivery conditions. Always confirm the standard requirements applicable to the project and supplied material.
Is the DWG ready for construction use?
The DWG is a drafting reference. Review its units, geometry, layers, and project requirements before incorporating it into issued construction documentation.
