Rate analysis for structural fabrication

Great — let’s dive into rate analysis for structural fabrication.

🔧 What Is Rate Analysis in Structural Fabrication?

Rate analysis is the detailed computation of the cost per unit (usually per ton or per square meter) for fabricating structural steel. It includes materials, labor, consumables, equipment, and overheads.

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🧮 Sample Structural Fabrication Rate Analysis (Per Metric Ton)

Component Unit Qty Rate (INR) Amount (INR)

1. Labor (fabrication) Man-hours/ton 90 100 9,000

2. Welding electrodes Kg/ton 8 300 2,400

3. Gases (O₂ + DA) m³/ton 6 150 900

4. Power consumption kWh/ton 50 10 500

5. Machinery usage per ton - 1,500 1,500

6. Paint / surface prep per ton - 800 800

7. Bolts / fittings per ton - 600 600

8. Overhead & profit % of subtotal 15% - 2,238

Total 17,938

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⚙️ Notes:

Rates vary based on project size, region, and fabrication complexity.

Labor productivity depends on plate thickness, joint type (butt/fillet), and workshop conditions.

For site fabrication, costs will be 15–25% higher due to logistics and handling.

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🧰 Typical Productivity Norms:

Activity Productivity (per day per person)

Manual SMAW welding 1.5 to 2.5 m/hr

Assembly & fitting (heavy) 0.8–1.2 MT/day

Oxy-acetylene cutting 1–2 m/hr (20mm plate)

Grinding & finishing 8–10 m²/day