SHS 70x70x7 is a cold formed welded square steel tube reference for engineers, detailers, fabricators, and CAD users working with structural hollow sections. This page brings together the source dimensions, corner radii, sectional area, unit weight, applicable standard context, and drawing access in one place.
Use the values below as a section-identification reference, then confirm material grade, design resistance, connection behavior, fabrication requirements, and project specifications before using the section in an engineered application.
SHS 70x70x7
Cold Formed Welded Square Steel Tubes
refer to : EN 10219-2
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 : 70x70x7
Depth : 70 mm
Width : 70 mm
Thickness : 7 mm
Outer Corner Radius : 17.5 mm
Inner Corner Radius : 10.5 mm
Sectional Area : 15.96 cm2
Unit Weight : 12.5 kg/m
Understanding the SHS 70x70x7 designation
The SHS designation means square hollow section. In this designation, the first dimensions identify the outside depth and width, while the final dimension identifies the wall thickness. The source lists a depth of 70 mm, a width of 70 mm, and a thickness of 7 mm.
Because the depth and width are equal, the section has a square outside profile. Its hollow form places steel around an open center, which is why hollow-section references are commonly considered through both cross-sectional properties and connection-detailing requirements. The section shape alone does not establish design capacity; verification still depends on loading, restraint, material, connection details, fabrication, and the governing design rules.
Corner radii and section properties
The listed outer corner radius is 17.5 mm and the inner corner radius is 10.5 mm. These radii describe the rounded transitions at the corners rather than a sharp-cornered geometric square. They are important when interpreting drawings, checking clearances, developing connections, and comparing the nominal profile with the manufactured form.
The source gives a sectional area of 15.96 cm2 and a unit weight of 12.5 kg/m. The sectional area supports section-property and mass calculations when used with the appropriate project assumptions. Unit weight is useful for estimating material quantities and dead load, but it should not be treated as a substitute for a complete structural check.
Standard and CAD reference
This entry refers to EN 10219-2, which addresses tolerances, dimensions, and sectional properties for cold-formed welded structural hollow sections made from non-alloy and fine grain steels. The source also identifies EN 10219-1 as covering technical delivery conditions. When procurement or fabrication is involved, review the complete project specification and the applicable standard requirements rather than relying on the section designation alone.
The associated DWG resource can support drafting and layout work. Before incorporating a downloaded drawing into a production document, check units, layer conventions, revision status, corner geometry, and compatibility with the project drawing standard. Related SteelSTD topics include square hollow sections, rectangular hollow sections, steel section properties, structural steel connections, and CAD detailing.
Frequently asked questions
What does SHS 70x70x7 mean?
It identifies a square hollow section with a listed outside depth of 70 mm, outside width of 70 mm, and wall thickness of 7 mm.
What are the listed corner radii?
The source lists an outer corner radius of 17.5 mm and an inner corner radius of 10.5 mm. These values represent the rounded manufactured corners of the tube.
What sectional area is listed for this section?
The listed sectional area is 15.96 cm2. Use it with the applicable design method and project assumptions when evaluating section behavior.
What is the listed unit weight?
The listed unit weight is 12.5 kg/m. This value can assist with material takeoffs and dead-load estimates, subject to project and fabrication requirements.
Which standard is referenced?
The entry refers to EN 10219-2 for dimensions, tolerances, and sectional properties, and identifies EN 10219-1 in connection with technical delivery conditions.
Is a CAD drawing available?
Yes. The source includes a DWG download for the SHS 70x70x7 profile. Review the drawing settings and project drafting requirements before use.
