RHS or universal beam for a span?

A UB is more material-efficient in pure bending and easier to connect with standard cleats. An RHS wins where the beam is unrestrained, where torsion is present, or where the steel is exposed and a clean rectangular face is wanted. On short and mid spans the RHS is frequently the tidier answer.

Does it matter which way round an RHS is fitted?

Yes. The deeper dimension should normally be vertical, because that is where the bending capacity comes from. Fitting the section flat can reduce its capacity dramatically, so orientation belongs on the drawing and is worth marking on the steel.

What grades of rectangular hollow section do you stock?

Standard supply is S275 and S355 to BS EN 10025, fully mill-certified with heat numbers traceable to the rolling mill. Other grades — including weathering and stainless — are available to order on request.

Can I order rectangular hollow section cut to length, drilled and notched?

Yes. Every RHS section is cut to your specified length and we can drill, notch, end-plate, weld and shot-blast / paint to your engineer's detail before delivery — all in-house under BS EN 1090 EXC 3.

How quickly can rectangular hollow section be delivered?

Stock RHS sections typically dispatch within 3–5 working days of order acceptance. Fabricated packages run to a confirmed production schedule agreed at order, with weekly progress reporting and HIAB offload worldwide.

Do you supply mill certificates with rectangular hollow section?

Yes. EN 10204 3.1 mill certificates are issued with every RHS order, fabricated work ships with the CE Declaration of Performance and full weld records, and trade buyers can have certification consolidated per project.

Can I buy rectangular hollow section without a trade account?

Yes. Homeowners, self-builders, architects and contractors can request a quote with no minimum order. Trade accounts are available for repeat buyers wanting consolidated billing and credit terms.

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BS EN 1090 / EXC 3

49 rectangular hollow section sections

Rectangular Hollow Section
(RHS)

Rectangular hollow sections (RHS) for goalpost frames, gantries, plant supports and architectural framing.

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CRsteelStructural steel fabrication & supply

BS EN 1090: Certified to BS EN 1090-1:2009+A1:2011 Execution Class 3 as per BS EN 1090-2:2018
30+ Years: Years supplying the industry with trusted structural steel fabrication and installation excellence
Workforce: Welding Quality Management System (WQMS) accredited by ISOQAR, approved to BS EN 1090 EXC 3.
Worldwide: Site erection coverage worldwide with full project management support

49 rectangular hollow section sections/BS EN 1090 — Certified to BS EN 1090-1:2009+A1:2011 Execution Class 3 as per BS EN 1090-2:2018/30+ Years — Years supplying the industry with trusted structural steel fabrication and installation excellence/Workforce — Welding Quality Management System (WQMS) accredited by ISOQAR/Worldwide — Site erection coverage worldwide with full project management support/

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Rectangular Hollow Section

Rectangular hollow sections are the practical middle ground between a beam and a tube: enough depth to span efficiently, a closed profile that will not twist or buckle laterally, and four flat faces that make fabrication straightforward.

Sizes are quoted as depth × width × wall thickness, for example 200 × 100 × 8. Because the two dimensions differ, orientation is part of the specification — each size page below lists the dimensions and weight per metre in full.

StructuralSteel.ai holds 49 RHS sizes, cut to length, drilled and CE marked under BS EN 1090 EXC 3, with EN 10204 3.1 mill certificates on every order. Typically specified for mezzanine edge beams, portal and goalpost frames, agricultural building framing, canopy and carport beams and exposed architectural framing.

Before you order

Which dimension is vertical in the finished structure
Wall thickness, which drives both strength and weldability
Hot-finished or cold-formed as specified
Vent and drain provision if the section is galvanised or external

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All rectangular hollow section (RHS) sizes

49 sections

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Fabrication, finishing and delivery

Cut to length, drilled and notched — Metal Fabrication
BS EN 9606-1 coded welding
CAD detailing and connection design
CE marked under BS EN 1090 EXC 3
worldwide delivery with HIAB offload
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FAQs

Rectangular Hollow Section (RHS),
answered.

Buying rectangular hollow section (RHS) — sizes, grades, cutting, fabrication and worldwide delivery from StructuralSteel.ai.

A UB is more material-efficient in pure bending and easier to connect with standard cleats. An RHS wins where the beam is unrestrained, where torsion is present, or where the steel is exposed and a clean rectangular face is wanted. On short and mid spans the RHS is frequently the tidier answer.

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