This reference identifies the Celsius 355 circular hollow section (CHS) designated 168.3×5. Use the listed dimensions and section data when checking steel shape schedules, preparing drawings, or coordinating a structural steel model.
The page is also useful alongside references covering CHS terminology, EN 10210 hollow sections, section properties, steel connections, and DWG detailing. The values shown below are the governing local reference data for this section.
Celsius 355 CHS 168.3×5
Celsius 355 Circular 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.
Diameter : 168.3 mm
Thickness : 5 mm
Sectional Area : 25.7 cm2
Unit Weight : 20.2 kg/m
How to read the CHS designation
In 168.3×5, the first value identifies the circular outside diameter and the second identifies the nominal wall thickness. Because this is a circular hollow section, the section is represented by a continuous closed profile rather than an open flange-and-web arrangement.
Reference standard and section data
The source refers to EN 10210-2:2006-04, which addresses dimensions, tolerances, and sectional properties for hot-finished structural hollow sections. The listed values should be kept together when checking a section schedule or transferring the designation into a drawing or model.
- Diameter: 168.3 mm
- Thickness: 5 mm
- Sectional area: 25.7 cm2
- Unit weight: 20.2 kg/m
Drafting and design use
Use the complete designation, including the Celsius 355 grade reference, section type, diameter, and thickness, to reduce ambiguity in drawings and schedules. The sectional area and unit weight support reference and coordination tasks, while member resistance, stability, connection behavior, fabrication requirements, and code compliance require separate engineering verification.
For CAD workflows, the accompanying DWG resource can help with geometry reference and detailing coordination. Confirm the section orientation, project material requirements, and applicable design assumptions before using the profile in issued documentation.
Frequently asked questions
What does CHS mean?
CHS means circular hollow section. It describes a closed, round structural steel profile.
What do 168.3×5 and the listed units represent?
The designation identifies a diameter of 168.3 mm and a thickness of 5 mm. The source also lists the sectional area in cm2 and the unit weight in kg/m.
Which standard is referenced for this section?
The source refers to EN 10210-2:2006-04 for dimensions, tolerances, and sectional properties of hot-finished structural hollow sections.
Can the listed unit weight be used as a complete design check?
No. Unit weight is one reference property. A complete design check also depends on the applicable design rules, member actions, restraint, connections, fabrication, and project requirements.
