D-shaped Tube

D-shaped Tube

With a smooth top, flat section and incredible lateral strength, this ingenious design prevents water ingress and it’s easy to install. Ideal for handrail in public buildings and on marine craft.

Our unique D-shaped profile been cleverly developed with ease of installation in mind. Ideal for public buildings, private yachts and cruise liners, its tremendous lateral strength and distinctive ridged design allow a flat and secure base to apply to bulwarks, brickwork and balustrades, including glass.

D-shaped tube is predominantly used as handrail. The underside lends itself to take square-cut balusters welded directly to the tubing. A glazing channel can be welded or attached by threaded inserts to the underside.

Its lateral strength means it makes a great replacement for traditional bulwark capping or handrail on larger boats and cruise liners. The original shape of the design not only aids installation but will also stop water ingress to the underside.

With the limited availability and ever-increasing cost of teak, our D-shaped profile is a stainless steel alternative to teak bulwark capping. It has become the selection of choice for boat owners and shipbuilders alike when formed from marine grade 316L stainless steel since it requires no maintenance and will always look as good as new.

Our stainless steel and aluminium 5083 oval tube profiles are sold in lengths of 5.8m (the manufacturing process reduces the standard 6m length by 0.2 metres).


  • Railings
  • Balustrades
  • Guardrails
  • Kick rails
  • Banisters
  • Balconies


D-shaped Tube Specifications

The image above shows how dimensions are detailed (for example, 65mm x 27mm x 2mm).
Below is a table of the available stainless steel tube sizes that we have in our existing range for this shape of tube. Can’t see the tube sizes you need? Contact us to discuss your project requirements – we may be able to fabricate some custom-made sized tubing. Or download our sizing PDF, which contains sizing information for existing aluminium and brass tubing too, as well as all stainless steel sizes.

D-shaped Stainless Steel Tube Sizes

Width Height Depth
34mm 12mm 1.5mm
50mm 18mm 1.5mm
65mm 27mm 2mm
100mm 40mm 2mm
138mm 49mm 2mm
177mm 55mm 2mm
177mm 55mm 3mm

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