Weight per metre, total weight, and the surface area that decides what galvanizing will cost. The third figure is the one nobody else gives you.
Steel weighs 7,850 kilograms per cubic metre. Everything below is that number multiplied by a cross-sectional area, and the formula for each section is shown as you use it so you can check the arithmetic rather than trust it.
The surface area output is the useful part. Galvanizing is priced and consumed by area, not by weight — a thin-walled hollow section of the same tonnage as a solid bar carries far more surface and takes far more zinc. If you are budgeting a galvanizing job, area is the number you actually need.
Theoretical weight at 7,850 kg/m³. Surface area is the figure that decides galvanizing, and almost nobody publishes it. Both ignore root and corner radii, so treat them as close estimates rather than mill figures.
Channels, beams and joists are not here on purpose. Their cross-sectional area includes root radii and tapered flanges that no simple formula gets right — take those from the IS 808 section tables rather than from a calculator.
All of it is IS 2062 structural steel — E250 at 250 MPa minimum yield, E350 at 350, E410 at 410 — with the sub-grade set by the toughness the design calls for. Chemistry is verified in-house on a Bruker Q2 ION optical emission spectrometer and mill test certificates travel with every consignment. See the IS 2062 page for what the sub-grade letters actually change.
Answered from our own line, not from the standard's cover page.
Cross-sectional area times density. For an equal angle the area is (2a − t) × t in square millimetres; multiply by 0.00785 to get kilograms per metre. For an unequal angle it is (a + b − t) × t.
7,850 kg per cubic metre, which works out at 0.00785 kg per metre for every square millimetre of cross-section.
Because galvanizing is consumed and priced by surface area, not by weight. Two consignments of the same tonnage can need very different amounts of zinc if one is thin-walled hollow section and the other is solid bar.
Their cross-sectional area depends on root radii and tapered flanges, which no simple formula gets right. Take those weights from the IS 808 section tables rather than from any calculator.
Not necessarily. These are theoretical weights on nominal dimensions. Real material carries rolling tolerance and usually comes in slightly heavier; contractual weight comes from the mill certificate or the weighbridge.
Tell us the standard, the coating requirement and the component, and we will confirm in writing what we can hold and how we will certify it. Galvanizing is on our own floor, so the answer comes from us and not from a sub-contractor.
Request a quotation Galvanizing job work