The Celsius 355 RHS 500x300x12.5 is a rectangular hollow section reference for structural steel detailing and preliminary design review. This page identifies the section dimensions, corner radii, sectional area, unit weight, applicable product standard, and available DWG resource.
Use the dimensional information alongside related RHS terminology, section properties, and steel connection and detailing guidance when developing drawings or checking a model. Final member selection and verification should be completed against the governing design requirements and project conditions.
Celsius 355 RHS 500x300x12.5
Celsius 355 Rectangular 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 : 500x300x12.5
Depth : 500 mm
Width : 300 mm
Thickness : 12.5 mm
Outer Corner Radius : 18.8 mm
Inner Corner Radius : 12.5 mm
Sectional Area : 192 cm2
Unit Weight : 150.7 kg/m
How to read the section designation
RHS means rectangular hollow section. In the designation 500x300x12.5, the first two values identify the outside depth and width, while the final value identifies the wall thickness. The source data lists these as a depth of 500 mm, a width of 300 mm, and a thickness of 12.5 mm.
Reference standard and geometry
The section is referenced to EN 10210-2:2006-04, which addresses dimensions, tolerances, and sectional properties for hot-finished structural hollow sections. The listed outer corner radius is 18.8 mm and the inner corner radius is 12.5 mm. Corner geometry is important when interpreting drawings, checking clearances, and coordinating connections or fittings around the section.
Section properties and drafting use
The source lists a sectional area of 192 cm2 and a unit weight of 150.7 kg/m. These values are useful reference data for quantity takeoffs, model checks, and preliminary engineering review. They should not be treated as a complete design check: resistance, buckling, connection behavior, fire performance, and serviceability depend on the project design basis and verification method.
DWG reference
A DWG download is provided for Celsius 355 RHS 500x300x12.5. Before using the file in production drawings, confirm the profile orientation, units, layer conventions, and project drafting requirements.
Frequently asked questions
What does RHS mean?
RHS stands for rectangular hollow section, a closed steel profile with a rectangular outside form and a hollow interior.
How is the 500x300x12.5 designation interpreted?
For this reference, it corresponds to a 500 mm depth, 300 mm width, and 12.5 mm wall thickness, as listed in the source content.
Why are the corner radii listed separately?
The inner and outer corner radii describe the rounded transitions between the flat faces. They support accurate detailing, clearance checks, fabrication coordination, and interpretation of sectional properties.
Where is the CAD file?
The page includes a DWG download for the Celsius 355 RHS 500x300x12.5 profile. Review the file settings and geometry before incorporating it into a project drawing or model.
