For a specified steel shape, takeoff weight is section weight per unit length multiplied by ordered length and quantity. Use the exact designation from the structural documents and current shape data.
For a specified structural shape, takeoff weight = published section weight per foot × ordered length × quantity. Keep connection plates, stiffeners, bolts, coatings, and fabrication loss separate.
Published: September 27, 2026
Last reviewed: September 27, 2026
Published by BuildYard. The guide reflects BuildYard's calculation methodology and editorial standards and does not replace project-specific professional advice.
AISC shape designations identify standardized dimensions and properties.
Never substitute a lighter or similar-looking section from takeoff math alone.
Total weight = published lb/ft × ordered feet × quantity.
Keep each mark and length visible for fabrication and freight planning.
Plates, stiffeners, connections, weld metal, bolts, coatings, and cut loss are separate quantities.
Purchased length can exceed installed length where fabrication requires it.
Use the current AISC Shapes Database or project-approved steel schedule.
Structural adequacy remains an engineer/design-document question.
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Read guide →Illustrative takeoff using a hypothetical 35 lb/ft scheduled section; the actual designation and AISC value must come from project documents.
| Step | Calculation | Result |
|---|---|---|
| Total length | 3×24 | 72 ft |
| Scheduled weight | Example input | 35 lb/ft |
| Beam weight | 72×35 | 2,520 lb |
| Extras | Connections/coating | Separate |
Current manufacturer data, supplier specifications, drawings, field measurements, applicable codes, permit requirements, and qualified professional guidance can take priority over a general-purpose planning estimate.