The Hybox 355 SHS 120x120x6 is a square hollow section reference for structural steel detailing, quantity checks, and preliminary section identification. This page provides the source dimensions, corner radii, sectional area, unit weight, applicable European standard reference, and a downloadable DWG file.
Use the listed properties as the controlling local reference for this section. For design work, confirm the required material, resistance, connection behavior, fabrication requirements, and applicable project criteria with the responsible engineer.
Hybox 355 SHS 120x120x6
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 : 120x120x6
Depth : 120 mm
Width : 120 mm
Thickness : 6 mm
Outer Corner Radius : 12 mm
Inner Corner Radius : 6 mm
Sectional Area : 26.4 cm2
Unit Weight : 20.7 kg/m
How to read this SHS reference
SHS means square hollow section. The designation 120x120x6 identifies the listed outside depth and width together with the nominal wall thickness. The reference also includes outer and inner corner radii, which are important when preparing accurate CAD geometry or checking how the section is represented in a model.
Section properties and estimating use
The sectional area describes the steel area used in section-property and material calculations. The unit weight expresses the listed mass per unit length and can support takeoff and preliminary weight checks. These values should be kept distinct from design resistance or capacity, which require the applicable material and structural verification.
Standard and CAD reference
The source identifies EN 10219-2:2006-04 for dimensional, tolerance, and sectional-property information for cold-formed welded structural hollow sections. It also notes the relationship with EN 10219-1, which addresses technical delivery conditions. See related SteelSTD references for SHS dimensions, structural section properties, EN 10219 terminology, and steel connection detailing.
The downloadable DWG is useful for drafting and coordination. Check the drawing units, layer conventions, insertion point, and project-specific modeling requirements before incorporating it into production documentation.
Frequently asked questions
What does Hybox 355 SHS 120x120x6 describe?
It identifies a Hybox 355 square hollow section with the dimensions and properties listed in the source content. The page is a section-reference entry, not a complete structural design check.
Why are the corner radii listed?
Corner radii help describe the actual profile shape and support more accurate CAD, detailing, and section modeling than a sharp-corner approximation.
What is the difference between sectional area and unit weight?
Sectional area describes the cross-sectional steel area, while unit weight describes the listed mass per unit length. They serve different purposes in calculations and material estimating.
Which standard is referenced for this section?
The source references EN 10219-2:2006-04 and explains that it covers dimensional, tolerance, and sectional-property information for cold-formed welded structural hollow sections. EN 10219-1 is identified for technical delivery conditions.
Can I use the DWG directly in a fabrication drawing?
The DWG can support drafting and coordination, but its geometry, units, layers, and project requirements should be checked before use in controlled fabrication documentation.
