SHS 51x51x4 is a cold-formed welded square hollow section with equal outside depth and width. This reference brings together the section dimensions, corner radii, sectional area, unit weight, applicable standard context, and a downloadable DWG resource.
Use the dimensional information below when checking a drawing or comparing square hollow sections. For structural applications, section selection, connection detailing, corrosion protection, fabrication requirements, and design resistance should be verified against the governing project requirements and by a qualified engineer.
SHS 51x51x4
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 : 51x51x4
Depth : 51 mm
Width : 51 mm
Thickness : 4 mm
Outer Corner Radius : 8 mm
Inner Corner Radius : 4 mm
Sectional Area : 7.11 cm2
Unit Weight : 5.6 kg/m
Understanding the SHS 51x51x4 reference
The designation SHS 51x51x4 identifies a square hollow section with a 51 mm outside depth, a 51 mm outside width, and a 4 mm wall thickness. Because the section is square, its principal outside dimensions are equal, while the hollow interior and rounded corners affect the available steel area and section geometry.
Corner radii and fabrication geometry
The listed outer and inner corner radii describe the transition between the flat faces of the tube. These radii are important when modeling the profile in CAD, checking fit-up at connections, or comparing a simplified sharp-corner representation with the actual manufactured section. They should not be omitted when accurate geometry is required.
Sectional area and unit weight
The sectional area describes the amount of steel in a cross-section, while the unit weight expresses the mass associated with a length of the member. These values are useful for quantity takeoffs, preliminary framing comparisons, fabrication documentation, and coordination with structural analysis data. They are reference properties, not by themselves a design resistance or allowable load.
Standard and CAD reference
The page identifies EN 10219-2 for dimensional, tolerance, and sectional-property reference and distinguishes it from the technical delivery requirements covered by EN 10219-1. The downloadable DWG can support drafting and layout work, but the drawing should be checked against the project specification and the required fabrication details before issue.
Related internal references can connect this page to square hollow sections, rectangular hollow sections, steel section properties, EN 10219 references, and structural steel CAD downloads.
SHS 51x51x4 FAQ
What does SHS 51x51x4 mean?
It identifies a square hollow section with an outside depth of 51 mm, an outside width of 51 mm, and a wall thickness of 4 mm.
What type of steel section is this?
It is described as a cold-formed welded square steel tube or square hollow section.
Why are the corner radii listed?
The corner radii define the rounded transitions between the flat faces. They help produce a more accurate CAD model and support dimensional checks at fabrication and connection locations.
What is the sectional area of this section?
The listed sectional area is 7.11 cm2. Use the value shown in the reference data for takeoffs or coordination, and confirm the applicable design basis before using it in engineering calculations.
What is the unit weight?
The listed unit weight is 5.6 kg/m. This value can support material quantity and handling estimates, subject to confirmation against the project documentation.
Is the DWG ready for structural design?
The DWG is a drafting reference for the listed profile. It does not replace engineering verification of member resistance, connection behavior, tolerances, fabrication, or project-specific requirements.
