300 x 300.x12.5 Square Hollow Section S355
300 x 300.x12.5 Square Hollow Section S355 is an SHS measuring 300 × 300 mm, combining the torsional stiffness of a closed section with faces you can actually bolt a plate to. Flat faces make connections much simpler than on circular tube: plates, cleats and brackets weld or bolt straight on without profiling.
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At 108 kg per metre, one tonne buys roughly 9.3 linear metres. This is a heavy primary member: craneage, access routes and unloading sequence should be agreed before the steel leaves us. Supplied in grade S355 to BS EN 10210 / BS EN 10219, cut to your lengths and delivered worldwide. Heat numbers are traceable back to the rolling mill, with EN 10204 3.1 certificates issued against each delivery.
Typically specified for mezzanine and platform posts, portal and goalpost frames, gate and railing frames, balustrade newel posts and machinery frames and skids.
Closed sections need vent holes before hot-dip galvanising; tell us if the position is visually sensitive.
Services for this section
Cut, drilled, certified, delivered
- Cut to length, drilled and notched
- BS EN 9606-1 coded welding
- CAD detailing and connection design
- CE Declaration of Performance
- worldwide delivery with HIAB offload
- Live structural steel prices
- Request a quote (24-hour response)
- Speak to the sales team
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FAQs
300 x 300.x12.5 Square Hollow Section S355,
answered.
Common questions about the 300 x 300.x12.5 Square Hollow Section S355 — weight, grade, cut-to-length and worldwide delivery.
- It weighs 108 kg per linear metre, so a tonne is approximately 9.3 metres. A 6 m length comes to about 648 kg. Use the figure for lifting plant selection and for pricing, since structural steel is sold by weight.
Ready to order | 300 x 300.x12.5 Square Hollow Section S355