Round bar
Illustrative geometry; dimensions are not a stock-size recommendation.
Required dimensions
- Diameter (mm)
A = πd² / 4Open section-weight workspace →
Shapes & Sections
A reference to section geometry, dimensions and the basis of stock-weight calculations.
Geometry and published section data serve different purposes.
Area equations below describe ideal, sharp-cornered geometry. Rolled sections can include fillets, flange slopes and manufacturing tolerances. Use the published mass and properties for the exact designation when a standard section is specified.
For area A in mm² and density ρ in kg/m³, mass per metre = ρA × 10⁻⁶ kg/m. Volume = area × length with consistent units. Density does not establish strength or suitability.
Hollow round / tube
Illustrative geometry; dimensions are not a stock-size recommendation.
Required dimensions
- Outside diameter (mm)
- Wall thickness (mm) — alternative dimension
- Inside diameter (mm) — alternative dimension
Specify outside diameter and either inside diameter or wall thickness. With thickness t, ID = OD − 2t.
A = π(OD² − ID²) / 4Open section-weight workspace →Pipe
Illustrative geometry; dimensions are not a stock-size recommendation.
Required dimensions
- Outside diameter (mm)
- Wall thickness (mm) — alternative dimension
- Inside diameter (mm) — alternative dimension
Specify outside diameter and either inside diameter or wall thickness. With thickness t, ID = OD − 2t.
A = π(OD² − ID²) / 4Open section-weight workspace →Square bar
Illustrative geometry; dimensions are not a stock-size recommendation.
Required dimensions
- Side width (mm)
A = b²Open section-weight workspace →Square hollow section (SHS)
Illustrative geometry; dimensions are not a stock-size recommendation.
Required dimensions
- Outside width (mm)
- Wall thickness (mm)
A = B² − (B − 2t)²Open section-weight workspace →Rectangular bar
Illustrative geometry; dimensions are not a stock-size recommendation.
Required dimensions
- Width (mm)
- Thickness (mm)
A = b × tOpen section-weight workspace →Rectangular hollow section (RHS)
Illustrative geometry; dimensions are not a stock-size recommendation.
Required dimensions
- Outside width (mm)
- Outside height (mm)
- Wall thickness (mm)
A = BH − (B − 2t)(H − 2t)Open section-weight workspace →Flat bar
Illustrative geometry; dimensions are not a stock-size recommendation.
Required dimensions
- Width (mm)
- Thickness (mm)
A = b × tOpen section-weight workspace →Plate
Illustrative geometry; dimensions are not a stock-size recommendation.
Required dimensions
- Plate width (mm)
- Thickness (mm)
A = b × tOpen section-weight workspace →Sheet
Illustrative geometry; dimensions are not a stock-size recommendation.
Required dimensions
- Sheet width (mm)
- Thickness (mm)
A = b × tOpen section-weight workspace →Hex bar
Illustrative geometry; dimensions are not a stock-size recommendation.
Required dimensions
- Across flats (mm)
A = √3 × AF² / 2Open section-weight workspace →Angle
Illustrative geometry; dimensions are not a stock-size recommendation.
Required dimensions
- Leg A (mm)
- Leg B (mm)
- Thickness (mm)
A = t(L₁ + L₂ − t)Open section-weight workspace →Channel
Illustrative geometry; dimensions are not a stock-size recommendation.
Required dimensions
- Overall depth (mm)
- Flange width (mm)
- Web thickness (mm)
- Flange thickness (mm)
A = tw(H − 2tf) + 2BtfOpen section-weight workspace →I-beam
Illustrative geometry; dimensions are not a stock-size recommendation.
Required dimensions
- Overall height (mm)
- Flange width (mm)
- Web thickness (mm)
- Flange thickness (mm)
A = 2Btf + (H − 2tf)twOpen section-weight workspace →H-beam
Illustrative geometry; dimensions are not a stock-size recommendation.
Required dimensions
- Overall height (mm)
- Flange width (mm)
- Web thickness (mm)
- Flange thickness (mm)
A = 2Btf + (H − 2tf)twOpen section-weight workspace →T-section
Illustrative geometry; dimensions are not a stock-size recommendation.
Required dimensions
- Overall height (mm)
- Flange width (mm)
- Web thickness (mm)
- Flange thickness (mm)
A = Btf + (H − tf)twOpen section-weight workspace →Z-section
Illustrative geometry; dimensions are not a stock-size recommendation.
Required dimensions
- Overall height (mm)
- Flange width (mm)
- Web thickness (mm)
- Flange thickness (mm)
A = tw(H − 2tf) + 2BtfOpen section-weight workspace →Oval tube
Illustrative geometry; dimensions are not a stock-size recommendation.
Required dimensions
- Outside width (mm)
- Outside height (mm)
- Wall thickness (mm)
A = π[WH − (W − 2t)(H − 2t)] / 4Open section-weight workspace →Wire
Illustrative geometry; dimensions are not a stock-size recommendation.
Required dimensions
- Diameter (mm)
A = πd² / 4Open section-weight workspace →Rod
Illustrative geometry; dimensions are not a stock-size recommendation.
Required dimensions
- Diameter (mm)
A = πd² / 4Open section-weight workspace →Custom cross-section
User supplied area
Geometry not defined
Geometry not defined
Illustrative geometry; dimensions are not a stock-size recommendation.
Required dimensions
- Cross-sectional area (mm²)
A = user-supplied cross-sectional areaOpen section-weight workspace →Available standard sections
Published records include ISMC 100, ISMC 125, ISMC 150, ISA 90 × 90 × 6, ISA 150 × 150 × 10, ISMB 100, ISMB 150. Their area, mass and section properties remain tied to the same source record.
SAIL — Structurals from SAILSection properties such as moment of inertia, section modulus and radius of gyration apply to the stated axes. Structural capacity, stability and code design require separate analysis.
Use section properties in Beam Analysis →