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Black galvanised steel square tube, 36 inches long, three-quarter inch wide

Nuvo Iron

Nuvo Iron SQPS36 36 in Black Square Tubing

SKU CH-48B8-WAD9X

36-inch galvanised steel square tubing with a black finish for structural projects

  • Product typeBuilding Materials
  • 36-inch length suits structural and decorative projects
  • 3/4-inch square profile fits standard brackets and connectors
  • Galvanised steel core resists corrosion in outdoor environments
  • Black powder-coat finish provides a clean, uniform appearance
  • California Proposition 65 notice included for regulatory transparency

Square Tubing for Structural Builds

Nuvo Iron SQPS36 is a 36 inch long black square tube made from galvanised steel. It suits fabricators, metalworkers and DIY builders who need a straight length for frames, brackets or custom supports. The 3/4 inch width provides a compact profile for tight assemblies. Buyers who require a different length or a rectangular profile will need another product.

Thermal Behaviour in Normal Use

The steel tube is a passive structural component with no moving parts, electronics or power draw. It generates no heat and produces no audible noise during handling or installation. Ambient temperature changes affect the metal uniformly. No cooling or ventilation considerations apply to this item.

Sustained Load Performance

Under continuous mechanical load the galvanised steel resists deformation within its material limits. The zinc coating protects against corrosion during long-term exposure to weather or moisture. The tube maintains its shape without active thermal management. Installers must verify that the section modulus meets the specific design requirements for their project.

How it compares

Measured against everything we stock in General Hardware & Accessories, at today’s prices. Recalculated every night.

Price $22.99
Pricier than about 54% of the 2,607 comparable items (median $18.99).

Specifications

Product
Brand nameNUVO IRON
Product typeBuilding Materials

Questions about this item

How do I cut and mount the 36 in galvanized steel square tubing for a structural frame?

Measure and mark the 36 in length, then cut with a metal-cutting blade or angle grinder. Deburr the edges, drill pilot holes to prevent splitting, and fasten with self-tapping screws or bolts rated for galvanized steel.

What maintenance does the black finish on this galvanized square tubing need over time?

Inspect the coating annually for scratches or white rust. Clean with mild soap and water, then touch up any exposed metal with a zinc-rich primer and matching black paint to maintain corrosion resistance.

At what load does the 3/4 in wide square tubing begin to deflect permanently under sustained weight?

The tubing will deflect based on span and load distribution; for a 36 in simply supported span, permanent set typically starts around mid-span when the bending stress exceeds the yield strength of the galvanized steel grade.

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