Buy Rectangular Hollow Sections (RHS) Online
Cut to Suit Your Exact Requirements –
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RHS Steel – Rectangular Hollow Sections
At Edcon Steel, we stock a wide range of rectangular hollow sections (RHS) to suit projects big and small. Our RHS are generally made from high-quality structural mild steel (350 MPa grade), ensuring reliable performance in load-bearing applications and compliance with Australian Standards. Customers can choose from bare (mill finish) steel, primed (painted) sections, and even galvanised options for robust corrosion protection. Every RHS can be cut to size to your exact requirements, so you only purchase what you need.
Rectangular Hollow Sections (RHS) are steel tubes shaped with a rectangular cross-section. They feature flat sides and a hollow centre, giving them excellent strength-to-weight ratio and stability under load. This shape makes RHS a versatile structural section; strong in both horizontal and vertical orientations, while the flat surfaces are easy to weld, bolt, or attach to other materials. RHS is popular with builders and DIYers alike for its combination of strength and relatively lightweight form.
Order online for nationwide delivery, or visit one of our stores in NSW (Brookvale, Revesby, Blacktown, Bathurst, and Orange) for expert advice and local pick-up.
Explore the product groups below to find the right structural steel solution for your next project.
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Key Specs & Options: Rectangular Hollow Sections (RHS)
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Specification |
Details |
| Dimensions (H×W) | ~50 × 20 mm (smallest typical RHS) up to ~250 × 150 mm (largest standard stock). Even larger sizes can be sourced by special order if required. |
| Wall Thickness | ~1.6 mm up to ~9.0 mm wall thickness, depending on size. (Common RHS sections have 2.0–5.0 mm walls; thicker sections are used for heavy structural jobs.) |
| Material Grade | Structural mild steel Grade C350 (350 MPa yield strength) is standard for our RHS. Stainless steel (304/316) and aluminium alloy 6060-T5 RHS are available by request for specialized applications. |
| Standard Lengths | Most RHS profiles are stocked in 6.0 m standard lengths for easy handling. Some large sections may come in 7.5 m or 8.0 m lengths. We custom-cut to any length you need (minimum cut as small as 15 mm), so you can order exact lengths rather than full bars. |
| Finish & Coatings | Mill Finish (raw steel): Bare, uncoated steel as rolled (can be painted or primed as needed). Primed/Painted: Supplied with a shop primer (paint) coating to protect against surface rust and ready for your top coat. Pre-Galvanised: Selected RHS sizes are available in zinc-coated steel for corrosion resistance (ideal for smaller sections and indoor/outdoor use). Hot-Dip Galvanised (HDG): For ultimate protection, we can arrange post-fabrication galvanising on your RHS – the section is dipped in molten zinc for a heavy-duty protective coat, inside and out. |
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Standards |
Edcon’s RHS profiles are manufactured to AS/NZS 1163 (Australian Standard for structural steel hollow sections) and related standards. All stock meets Australian quality requirements and can be supplied with material test certificates on request. |
Cut to Size. Packed. Delivered.
- We can custom cut lengths to the millimetre – minimum cut just 15 mm.
- Cut-to-size items are available in-store while you wait, and online orders are processed the same day or the next day in most cases.
- Shorter cuts are cheaper to ship and sent via couriers or Australia Post.
- Large or long orders are delivered by our own delivery truck fleet in NSW or by national freight partners.
Work Smarter with Edcon Steel
Plan Your Lengths: Use standard 6.0 m lengths to reduce wastage where you can. Remember we can cut your RHS to any length you require, so you only buy what you need.
Custom Fabrication: Save time on-site by ordering RHS fabricated by our expert team. We can prepare your steel to spec, so it’s ready to install, no extra drilling or welding needed on your end.
Cutting & Bending: Plan your project with straight lengths in mind. Thick RHS is difficult to bend without specialist equipment, so for sharp angles it’s usually better to cut and weld sections rather than trying to bend them.
Storage: Store your RHS properly to maintain its condition. Keep steel sections off the ground and under cover to stay dry. If storing outside, try to cap the tube ends or cover them, as this prevents water from pooling inside the hollow section.
Check with a Professional: All information here is general. Always confirm your steel sizes and load requirements with a qualified engineer or builder before installation to ensure compliance and safety.
Common Uses and Sectors: Steel Rectangular Hollow Section (RHS)
Rectangular hollow sections (RHS) are trusted across construction, civil, residential and industrial projects for their strength, clean shape and versatility. In building and construction, RHS is ideal for framing, used in beams, columns, lintels, rafters and bracing in homes, sheds and commercial buildings. The rectangular profile offers directional strength and fits well into confined spaces.
In infrastructure and industrial settings, RHS supports bridge trusses, gantries, machinery frames and heavy equipment. Its closed shape resists bending and twisting, making it reliable under dynamic loads. In automotive and manufacturing, RHS is commonly used in trailers, truck frames and roll-cages.
For residential and DIY use, RHS suits everything from gate frames and furniture to pergolas and architectural features.
Edcon Steel supplies RHS across NSW through our Brookvale, Revesby, Blacktown, Bathurst, and Orange stores, with Australia-wide delivery also available.
For more information, read our Steel and Metal articles. Additionally, the One Steel guide for builders and owner-builders provides support in the design, sizing, and applications of structural steel products for domestic and house building.
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Read MoreFrequently Asked Questions
Can I get RHS cut to size at your stores?
Yes. All Edcon Steel locations (Brookvale, Revesby, Blacktown, Bathurst, and Orange) and our online store offer custom cut-to-size services.
Do you deliver RHS outside of Sydney and NSW?
Yes, we offer Australia-wide delivery on all RHS products, with fast dispatch from our NSW stores in Brookvale, Revesby, Blacktown, Bathurst, and Orange. Our Edcon Steel trucks deliver daily to sites across Sydney and Central Western NSW (including Bathurst and Orange). For areas outside our truck network, we partner with reliable national freight providers to get your order to you safely and efficiently. Because RHS can be long and heavy, freight charges can vary.
Can I collect my RHS from a local store?
Absolutely. You can use our free Click & Collect service from any Edcon Steel store in Brookvale, Revesby, Blacktown, Bathurst, and Orange. Place your order online and we’ll notify you when it’s ready for pickup.
Where can I buy RHS in Sydney?
Edcon Steel has stores in Brookvale, Revesby, and Blacktown. You can also order online 24/7 for delivery across Sydney and NSW. Our team can help you choose the right RHS for your project.
Do the Orange and Bathurst stores stock RHS?
Yes. Our regional NSW stores in Bathurst and Orange stock a wide range of RHS. If a specific size isn’t in stock, we can quickly transfer it from another branch or arrange delivery from our central warehouse.
How much does steel RHS cost?
Prices vary based on size, material grade and finish. You can view live pricing and stock availability on our website or request a quote from your nearest store. We sell by the length you need, so you only pay for what you use.
Does Edcon Steel offer structural steel fabrication?
Edcon provides complete in-house fabrication services, completed to AS 4100 and AS/NZS 5131 standards. Our qualified team can fabricate from your drawings or assist with detailing, supplying fully prepped steel that’s ready for installation on residential, commercial, or industrial projects. Whether it’s a one-off custom job or a repeat order, we deliver quality, compliant results tailored to your needs.
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