This reference covers the Hybox 355 square hollow section identified as 70x70x5. Use the listed dimensions, corner radii, sectional area, and unit weight when checking drawings, schedules, and preliminary section selections.
For design or detailing work, confirm that the section data matches the governing project specification and the applicable material and fabrication requirements. The page also provides a DWG resource for CAD workflows.
Hybox 355 SHS 70x70x5
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 : 70x70x5
Depth : 70 mm
Width : 70 mm
Thickness : 5 mm
Outer Corner Radius : 10 mm
Inner Corner Radius : 5 mm
Sectional Area : 12.4 cm2
Unit Weight : 9.7 kg/m
How to read the Hybox 355 SHS data
SHS means square hollow section: the outside profile has equal depth and width, with a hollow interior and rounded corners. The stated thickness applies to the section wall, while the outer and inner corner radii describe the transition between the flat faces.
The sectional area is useful for section-property checks and material takeoffs. The unit weight supports estimating linear mass and reviewing member schedules. These values describe the published section and should not be confused with design resistance, which depends on factors such as material properties, member length, restraint, loading, connection details, and the applicable design method.
Standard and fabrication context
The source references EN 10219-2 for dimensional tolerances, dimensions, and sectional properties of cold-formed welded structural hollow sections. It also identifies the relationship with EN 10219-1, which addresses technical delivery conditions. When using this reference alongside a steel grades guide or a structural hollow section overview, keep dimensional data separate from specification and delivery requirements.
CAD and drafting workflow
The linked DWG can support layout, detailing, and section-library workflows. Before issuing a drawing, verify the section designation, orientation, corner representation, units, and project-specific tolerances. For broader drafting guidance, see related resources on steel connections, structural steel detailing, and CAD block standards.
Frequently asked questions
What does SHS mean?
SHS means square hollow section. It is a hollow structural profile with equal outside depth and width and rounded corners.
What does 70x70x5 identify?
In this reference, the designation identifies the listed outside depth, outside width, and wall thickness. The complete source data also provides the associated corner radii, sectional area, and unit weight.
What is EN 10219-2 used for?
EN 10219-2 is referenced here for dimensional information, tolerances, and sectional properties for cold-formed welded structural hollow sections. It should be read together with the applicable technical delivery requirements when specifying material.
Can the DWG be used directly for fabrication?
The DWG is a drafting resource, not a substitute for project drawings or fabrication review. Check units, section designation, dimensions, tolerances, connections, and revision status before using it in issued documentation.
Does the listed unit weight establish design capacity?
No. Unit weight describes linear mass. Structural capacity requires project-specific checks that account for material, loading, restraint, member behavior, connections, and the governing design requirements.
