StructureCalcsISA 150x150x20
Angle (ISA) · IS 808 · India
ISA 150x150x20 is an Indian standard angle with 150 × 150 mm legs, 20.0 mm thick, weighing 42.6 kg/m. The dimensions below are the published IS 808 values; the drawing is generated from them.
ISA angles brace and connect Indian steelwork; an angle bends about tilted principal axes, and the derived principal values below carry their angle.
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Published dimensions
| Property | Metric | Imperial |
|---|---|---|
| Leg length, d | 150 mm | 5.91 in |
| Thickness, t | 20.0 mm | 0.787 in |
| Mass per metre | 42.6 kg/m | 28.6 lb/ft |
| Area, A | 5,430 mm² | 8.42 in² |
| Second moment, Ix | 11,100,000 mm⁴ | 26.7 in⁴ |
| Second moment, Iy | 11,100,000 mm⁴ | 26.7 in⁴ |
Derived section properties
Integrated from a square-cornered outline — the fillet radii this family really has are not drawn, so the computed values differ slightly from published. For ISA 150x150x20 the computed area is 3.13% from published and Ix 4.47%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Zex | 110,255 mm³ |
| Elastic modulus, Zey | 110,255 mm³ |
| Plastic modulus, Zpx | 198,733 mm³ |
| Plastic modulus, Zpy | 198,733 mm³ |
| Radius of gyration, rx | 45.5 mm |
| Radius of gyration, ry | 45.5 mm |
| Principal maximum, Imax (derived) | 18,386,667 mm⁴ |
| Principal minimum, Imin (derived) | 4,806,310 mm⁴ |
| Principal axis angle, θp | 45.0° |
Ze is the elastic modulus and Zp the plastic modulus, following IS 800 notation.
Neighbouring sizes
Where these numbers come from
Published IS 808 values. How StructureCalcs verifies its numbers · Understanding steel section properties · Query this section over the API