Galvanised Steel Box & Rectangle Section – Square Hollow Section SHS & RHS, 6m Lengths & Cut to Size, Galv Steel Tube for Fabrication
Galvanised Steel Box & Rectangle Section – Square Hollow Section SHS & RHS, 6m Lengths & Cut to Size, Galv Steel Tube for Fabrication
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Galvanised steel box section and rectangular hollow section, supplied in full 6m lengths or cut to size on request. The zinc coating protects the steel against rust and weathering, making these hollow sections ideal for outdoor gates, fencing, frames, trailers, agricultural work and any exposed fabrication — without painting. Available in square (SHS) and rectangular (RHS) profiles, on a 3-5 working day lead time to mainland UK.
Technical Specification
| Material | Galvanised mild steel |
| Profiles | Square hollow section (SHS) & rectangular hollow section (RHS) |
| Coating | Zinc galvanised for corrosion resistance |
| Length | 6m full length, or cut to size on request |
| Finish | Galvanised zinc coating |
| Weldability | Weldable (re-coat welds with zinc-rich paint) |
| Lead time | 3-5 working days (mainland UK) |
Galvanised Box Section Sizes & Weight Chart
Galvanised box section and rectangular hollow section size chart with nominal weight per metre. All sizes in 6m lengths or cut to size.
| Size | Profile | Weight (kg/m) |
|---|---|---|
| 20 x 20 x 2.5mm | Square (SHS) | 1.3 |
| 25 x 25 x 2mm | Square (SHS) | 1.4 |
| 30 x 30 x 2.5mm | Square (SHS) | 2.1 |
| 40 x 40 x 2.5mm | Square (SHS) | 2.9 |
| 50 x 50 x 3mm | Square (SHS) | 4.4 |
| 80 x 80 x 3mm | Square (SHS) | 7.2 |
| 100 x 100 x 3mm | Square (SHS) | 9.0 |
| 100 x 50 x 3mm | Rectangular (RHS) | 6.7 |
Popular galvanised box section sizes include 20x20, 25x25, 40x40 and 50x50 box section for gates, fencing and frames, up to 80x80 and 100x100 box section, plus 100x50 rectangular hollow section. Weights are nominal mass per metre before galvanising (to EN 10219) — for an exact figure use our metal weight calculator.
Rackerman is a UK steel supplier: buy galvanised box section — also known as galvanised square hollow section, galvanised SHS/RHS or galv box steel — online with fast mainland UK delivery and cut-to-size service, a convenient alternative to a local steel stockholder near you.
Galvanised Finish & Corrosion Resistance
The zinc galvanised coating protects the steel from rust and weathering, making these sections suitable for outdoor and damp environments without painting. Cut ends, drilled holes and welded areas expose bare steel and should be protected with a zinc-rich paint or cold galvanising spray to maintain corrosion resistance. Store sections dry and ventilated before use to avoid white-rust staining.
Common Uses
Galvanised box and rectangle section is used for gates, railings, fencing, outdoor frames, trailers, agricultural and livestock structures, garden and greenhouse frames, support posts and general external metalwork. The hollow profile gives strength and rigidity while staying easier to handle and fabricate than solid bar.
Cutting and Fabrication
These hollow sections cut, drill and weld with standard metalworking tools. When welding galvanised steel, work in a well-ventilated area with suitable extraction because zinc fumes are hazardous, and re-coat welds and cut ends with zinc-rich paint afterwards to restore protection.
Compare Our Full Box & Rectangle Section Range
Match the section to your job: S235 square box section (SHS), 3m box section for short handling, rectangular hollow section (RHS) for directional strength, ERW box & rectangle for thin-wall sizes, 6063 aluminium box section for light weight and 304 stainless box section for maximum corrosion resistance. Browse the full hollow section collection.
Related Guides
Read more in our guides: galvanised steel: rust, paint & welding, does galvanised steel rust? and the metal weight calculator.
Delivery Information
Lead times are currently 3-5 working days to mainland UK. Galvanised box and rectangle sections are long, heavy 6m items, so suitable delivery access is required and offloading assistance is needed on site. Contact us for a custom quote on bulk or trade quantities.
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FREQUENTLY ASKED QUESTIONS
Q: What sizes are available in the 6m galvanised steel range?
A: We stock a wide range of sizes in both SHS and RHS profiles. Common sizes include 25x25mm, 50x50mm, 100x50mm, and more. Wall thicknesses typically range from 1.5mm to 6mm. Contact us for our full size chart or custom orders.
Q: Can I cut the 6m galvanised sections to size?
A: Yes, galvanised steel box and rectangular sections can be cut using appropriate tools such as a chop saw or angle grinder. We also offer cut-to-size services—let us know your measurements and we’ll deliver pre-cut sections ready for use.
Q: What are the benefits of galvanised steel over plain mild steel?
A: Galvanised steel has a protective zinc coating that prevents rust and corrosion, making it ideal for outdoor, marine, and industrial applications. It’s low-maintenance and highly durable, even in harsh environments.
Q: Are these steel sections suitable for welding and fabrication?
A: Yes, galvanised box and rectangular sections can be welded and fabricated, though it's recommended to grind back the galvanising at weld points for best results and recoat afterwards to maintain corrosion protection.
Q: Do you offer delivery for 6m steel lengths?
A: Absolutely. We offer local and nationwide delivery for all 6m galvanised box and rectangle sections. Delivery charges vary based on location and quantity—please contact us for a quote.
Q: Can I order in bulk or request a trade discount?
A: Yes, we offer competitive pricing on bulk orders and trade accounts. Get in touch with our sales team to discuss your project requirements and receive a custom quote.
MONEY BACK GUARANTEE
Here at Rackerman, we take customer satisfaction very seriously. If you are unsatisfied with the quality of your product, please email us info@rackerman.co.uk or give us a call: 01665 497513 and we will make it right.
SHIPPING
It should take no longer than 1-2 business day to process your order, then 3-5 working days (5-10 working days on RSJs) to then receive your order from us after dispatch.
If you haven't received your items in this time frame, please contact us.
RETURNS
If you are unsatisfied with your purchase, that's completely fine! We offer a 30 day money back guarantee to all customers, no questions asked! Please contact us to arrange a return.