Steel Economics — Paint/Fireproofing Surface Area
Coating area and material from tonnage and the section-weight surface ratio.
Steel surface area runs 20–25 m² per tonne for typical building sections — lighter sections expose MORE area per tonne, not less. Coating quotes hinge on this ratio; heavy industrial steel is cheap to paint per tonne, joist-work expensive.
Formula
Note: Erection-planning estimate only. Member weights, connection capacities and tolerances for execution must come from the issued drawings, the EOR and the erection engineer — never from a generic calculator.
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates — verify with a qualified professional before making decisions. Read the full disclaimer.
Coating area and material from tonnage and the section-weight surface ratio. A free structural steel delivery & erection tool — no sign-up, no upload, instant results in your browser.
About Steel Economics — Paint/Fireproofing Surface Area
Steel Economics — Paint/Fireproofing Surface Area computes the governing relationship A = t × m²/t · L = A×DFT/(10×solids%) × (1+loss) live as you type. Steel surface area runs 20–25 m² per tonne for typical building sections — lighter sections expose MORE area per tonne, not less. Coating quotes hinge on this ratio; heavy industrial steel is cheap to paint per tonne, joist-work expensive. Defaults are pre-filled with realistic values for this exact scenario, and the worked example substitutes your numbers step by step so the math is never a black box.
How to use Steel Economics — Paint/Fireproofing Surface Area
- 1Enter your values — Steel tonnage, Surface area ratio, Dry film thickness, Volume solids and more (sensible defaults are pre-filled).
- 2Read the live results: Surface area, Paint required.
- 3Check the "with your numbers" line to see A = t × m²/t · L = A×DFT/(10×solids%) × (1+loss) substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Steel Economics — Paint/Fireproofing Surface Area?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula A = t × m²/t · L = A×DFT/(10×solids%) × (1+loss) with authoritative sources cited on the page (AISC 303 — Code of Standard Practice for Steel Buildings)
- ✓Steel surface area runs 20–25 m² per tonne for typical building sections — lighter sections expose MORE area per tonne, not less.
- ✓Niche-specific defaults give a meaningful worked answer the moment the page loads
Frequently asked questions
What formula does the steel economics — paint/fireproofing surface area use?+
It evaluates A = t × m²/t · L = A×DFT/(10×solids%) × (1+loss), exactly as published. Sources: AISC 303 — Code of Standard Practice for Steel Buildings. The substituted worked example on the page lets you verify every step against the textbook.
How should I read the result — and how far can I trust it?+
Steel surface area runs 20–25 m² per tonne for typical building sections — lighter sections expose MORE area per tonne, not less. Erection-planning estimate only. Member weights, connection capacities and tolerances for execution must come from the issued drawings, the EOR and the erection engineer — never from a generic calculator.
When is this calculator the right tool for the job?+
Coating area and material from tonnage and the section-weight surface ratio. A free structural steel delivery & erection tool. Coating quotes hinge on this ratio; heavy industrial steel is cheap to paint per tonne, joist-work expensive. For neighbouring scenarios, the related tools below cover the same engine with different presets.
Do I need to install anything or create an account?+
No. The tool is pure client-side JavaScript: open the page and it works, offline once loaded, with no account, no quota and no data leaving your device.
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