Celsius 355 CHS 273×11 is a hot-finished circular hollow section identified by its product range, circular profile, outside diameter, and wall thickness. The reference data below records a diameter of 273 mm, a thickness of 11 mm, a sectional area of 90.5 cm2, and a unit weight of 71 kg/m.
This page is intended as a quick section-identification and CAD reference. Designers and detailers can use the listed values to coordinate member callouts, preliminary material schedules, drawing labels, and model checks while retaining the original section data and DWG download resource.
Celsius 355 CHS 273×11
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 : 273 mm
Thickness : 11 mm
Sectional Area : 90.5 cm2
Unit Weight : 71 kg/m
How to read the section designation
CHS means circular hollow section. In the designation 273×11, the first value identifies the listed outside diameter and the second identifies the listed wall thickness. Keeping this notation consistent across plans, elevations, details, schedules, and fabrication documents helps reduce ambiguity.
The words Celsius 355 identify the stated product range. The designation alone should not be used to assume every material or design parameter required for structural verification. Confirm the applicable material documentation, project specification, and engineering requirements separately.
Understanding the listed properties
Diameter and thickness
The diameter defines the overall circular envelope of the member, while the thickness describes the nominal wall dimension. These values are important when checking clearances, connection geometry, end treatments, weld access, sleeves, collars, and interfaces with other components.
Sectional area
Sectional area describes the amount of steel in the cross-section. It is a fundamental input for several engineering calculations, but it is not a standalone statement of member capacity. Structural resistance also depends on material properties, member length, stability, loading, connection behavior, and the governing design method.
Unit weight
Unit weight expresses mass per unit length. It can support quantity takeoffs and member-weight calculations when multiplied by the required length. Allowances for plates, weld metal, bolts, fittings, coatings, and fabrication items should be handled separately where applicable.
Standard context
The source identifies EN 10210-2:2006-04 as the dimensional reference and notes its relationship to EN 10210-1 for technical delivery conditions. When using the section on a project, verify that the specified product, documentation, tolerances, and delivery requirements align with the governing contract documents and current project criteria.
Using the DWG in a detailing workflow
- Confirm the drawing units before inserting or scaling the geometry.
- Check that the CAD profile agrees with the listed diameter and thickness.
- Use a clear section callout so the product range and size remain identifiable.
- Review layers, line types, insertion points, and block organization to match office standards.
- Coordinate openings, end cuts, plates, welds, and attached components with the actual connection design.
- Treat the file as a drafting resource rather than proof of structural adequacy or fabrication approval.
Related reference topics
Useful companion subjects include CHS size references, hollow-section terminology, section-property explanations, unit-weight calculations, tube connection detailing, welded hollow-section joints, base plates, and CAD block management. Comparing these topics can help users move from section selection to coordinated drawings without confusing geometric data with design capacity.
Frequently asked questions
What does CHS mean?
CHS means circular hollow section, a closed steel section with a circular exterior profile.
What does 273×11 represent?
For this listed section, 273 mm is the diameter and 11 mm is the thickness.
What is the listed sectional area?
The source data gives a sectional area of 90.5 cm2.
What is the listed unit weight?
The source data gives a unit weight of 71 kg/m. This value applies per unit length and does not include separate connection components or fabrication additions.
Can the DWG be used directly for fabrication?
The DWG can support drafting and coordination, but it should be checked for units, geometry, layers, and project-specific requirements. Fabrication documents and connection details require appropriate technical review and approval.
Does this page provide a load capacity?
No. The listed dimensions and section properties do not by themselves establish load capacity. Capacity must be evaluated using the applicable material data, loading, member conditions, connections, and governing design rules.
