The Hybox 355 RHS 90x50x3 is a rectangular hollow section reference for engineers, detailers, fabricators, and CAD users working with structural steel sections. This page brings together the published geometry, sectional area, unit weight, standard reference, and DWG resource for the section.
Use the original data below when checking section identification, preparing drawings, or comparing rectangular hollow sections. For broader context, see related guidance on RHS dimensions, section properties, structural steel terminology, and CAD/DWG steel references.
Hybox 355 RHS 90x50x3
Hybox 355 Rectangular Hollow Sections
refer to : EN 10219-2:2006-04
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 : 90x50x3
Depth : 90 mm
Width : 50 mm
Thickness : 3 mm
Outer Corner Radius : 6 mm
Inner Corner Radius : 3 mm
Sectional Area : 7.81 cm2
Unit Weight : 6.1 kg/m
How to read this RHS reference
The designation 90x50x3 identifies the principal outside dimensions and wall thickness listed in the source data. The page separates depth, width, thickness, and corner radii so that the section can be identified consistently in drawings, schedules, and fabrication documentation.
Standard reference and product data
The cited EN 10219-2 reference is used here for the dimensional, tolerance, and sectional-property context of cold-formed welded structural hollow sections. The source also identifies EN 10219-1 as covering technical delivery conditions. These references should be read together with the applicable project specification and material documentation.
Using the area and unit weight
The listed sectional area and unit weight are useful for section comparison, quantity takeoffs, preliminary dead-load calculations, and drafting schedules. They do not by themselves establish member resistance, connection capacity, buckling performance, or suitability for a particular structural design. Those checks require the governing design rules, material information, load effects, restraint conditions, and engineering verification.
DWG resource
The downloadable DWG is intended to support CAD and detailing workflows. Confirm units, layer conventions, insertion settings, and project-specific drawing requirements before incorporating the file into production documentation.
Frequently asked questions
What does RHS mean?
RHS means rectangular hollow section. It is a hollow steel section with a rectangular outside profile and rounded corners.
Which standard is referenced for this section?
The source references EN 10219-2 and notes its relationship to EN 10219-1. Check the project specification and supplier documentation for the requirements applicable to the ordered material.
Can the listed unit weight be used for design?
It can support quantity and dead-load assessments, but it is not a complete design check. Member strength, stability, connections, and fabrication conditions must be verified by a qualified engineer.
Is a CAD file available?
Yes. The page includes a DWG download associated with the Hybox 355 RHS 90x50x3 reference.
