This page provides a focused dimensional and CAD reference for the Celsius 355 SHS 300x300x8.8 hot-finished square hollow section. The verified source content below records the section size, wall thickness, corner radii, sectional area, unit weight, and applicable dimensional reference.
Use the information as a section-identification aid when reviewing drawings, coordinating steel models, or preparing fabrication details. Final member selection, connection design, and project compliance should be checked by the responsible design professional against the governing project requirements.
Celsius 355 SHS 300x300x8.8
Celsius 355 Square Hollow Sections
refer to : EN 10210-2:2006-04
the European standard that specifies tolerances, dimensions, and sectional properties for hot-finished structural hollow sections of non-alloy and fine grain steels. It supports EN 10210-1, which covers technical delivery conditions.
Dimension : 300x300x8.8
Depth : 300 mm
Width : 300 mm
Thickness : 8.8 mm
Outer Corner Radius : 13.2 mm
Inner Corner Radius : 8.8 mm
Sectional Area : 102 cm2
Unit Weight : 80.1 kg/m
Understanding the SHS designation
SHS means square hollow section. The designation 300x300x8.8 identifies equal outside depth and width with the stated wall thickness. Equal outside dimensions distinguish the profile from a rectangular hollow section, while the closed shape distinguishes it from open sections such as channels and structural angles.
Although the designation provides the principal size, it does not fully describe the section geometry. The outer and inner corner radii are also relevant when producing an accurate cross-section, checking clearances, or coordinating plates and weld details near the corners.
Key reference values
- Outside depth: 300 mm
- Outside width: 300 mm
- Wall thickness: 8.8 mm
- Outer corner radius: 13.2 mm
- Inner corner radius: 8.8 mm
- Sectional area: 102 cm²
- Unit weight: 80.1 kg/m
How the listed properties are used
Sectional area
Sectional area represents the amount of steel in the cross-section. It is an important input for several engineering checks, but it is not a load capacity by itself. Capacity also depends on factors such as material properties, member length, restraint, connection behavior, loading, and the applicable design rules.
Unit weight
Unit weight expresses the member mass for a given length. It is useful for material schedules, preliminary quantity checks, shipping coordination, lifting studies, and model data review. A total member mass can be estimated from the listed unit weight and the actual member length, subject to allowances for plates, weld metal, bolts, coatings, and other attached items.
Corner radii
Square hollow sections do not have sharp theoretical corners. The listed outer and inner radii describe the curved corner geometry. These radii matter when a plate, cutout, weld, or adjacent component is positioned close to an SHS corner. A simplified sharp-corner outline may be adequate for some diagrams, but detailed CAD work should retain the verified profile geometry where fit and clearance are important.
Using the DWG resource
The DWG download can support section libraries, detail development, profile comparison, and drawing coordination. Before placing the geometry into a production drawing, confirm the file units, insertion scale, layer organization, orientation, and correspondence with the values shown on this page.
A section-profile drawing should not be treated as a complete member or connection design. End conditions, holes, welds, plates, tolerances, fabrication requirements, and project-specific notes must be developed and verified separately.
Standards and related reference topics
The source data refers to EN 10210-2:2006-04 for tolerances, dimensions, and sectional properties of hot-finished structural hollow sections. It also notes the relationship to EN 10210-1 for technical delivery conditions. When coordinating this section with other documents, distinguish dimensional reference information from material ordering, delivery, design, and fabrication requirements.
Useful related topics include square hollow section dimensions, hollow-section property terminology, section weight concepts, corner-radius detailing, steel CAD blocks, and the differences between SHS, RHS, and open structural shapes.
Frequently asked questions
What does 300x300x8.8 mean?
It identifies an SHS with a 300 mm outside depth, 300 mm outside width, and 8.8 mm wall thickness.
What corner radii are listed for this section?
The verified source values are a 13.2 mm outer corner radius and an 8.8 mm inner corner radius.
What are the listed sectional area and unit weight?
The sectional area is 102 cm², and the unit weight is 80.1 kg/m.
Which dimensional standard is referenced?
The source content refers to EN 10210-2:2006-04 and notes its relationship with EN 10210-1.
Can the listed dimensions be used to determine structural capacity?
No. Dimensions, area, and unit weight are reference properties rather than a complete capacity determination. Structural checks require the applicable material data, loading, member conditions, connection behavior, and governing design requirements.
What should be checked after downloading the DWG?
Confirm the drawing units, scale, profile dimensions, corner geometry, layers, and insertion orientation before using it in a project drawing or CAD library.
