StructureCalcsISA 30x30x4
Angle (ISA) · IS 808 · India
ISA 30x30x4 is an Indian standard angle with 30 × 30 mm legs, 4.0 mm thick, weighing 1.7 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.
Analyse this section, or combine it with plates and other shapes.
Open ISA 30x30x4 in the Section CalculatorFree, no sign-up, runs in your browser.
Published dimensions
| Property | Metric | Imperial |
|---|---|---|
| Leg length, d | 30 mm | 1.18 in |
| Thickness, t | 4.0 mm | 0.157 in |
| Mass per metre | 1.7 kg/m | 1.1 lb/ft |
| Area, A | 222 mm² | 0.34 in² |
| Second moment, Ix | 19,600 mm⁴ | 0.0 in⁴ |
| Second moment, Iy | 19,600 mm⁴ | 0.0 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 30x30x4 the computed area is 0.90% from published and Ix 5.33%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Zex | 882 mm³ |
| Elastic modulus, Zey | 882 mm³ |
| Plastic modulus, Zpx | 1,590 mm³ |
| Plastic modulus, Zpy | 1,590 mm³ |
| Radius of gyration, rx | 9.1 mm |
| Radius of gyration, ry | 9.1 mm |
| Principal maximum, Imax (derived) | 29,419 mm⁴ |
| Principal minimum, Imin (derived) | 7,690 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