StructureCalcsISA 45x45x4
Angle (ISA) · IS 808 · India
ISA 45x45x4 is an Indian standard angle with 45 × 45 mm legs, 4.0 mm thick, weighing 2.7 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.
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Published dimensions
| Property | Metric | Imperial |
|---|---|---|
| Leg length, d | 45 mm | 1.77 in |
| Thickness, t | 4.0 mm | 0.157 in |
| Mass per metre | 2.7 kg/m | 1.8 lb/ft |
| Area, A | 342 mm² | 0.53 in² |
| Second moment, Ix | 68,200 mm⁴ | 0.2 in⁴ |
| Second moment, Iy | 68,200 mm⁴ | 0.2 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 45x45x4 the computed area is 0.58% from published and Ix 2.26%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Zex | 2,065 mm³ |
| Elastic modulus, Zey | 2,065 mm³ |
| Plastic modulus, Zpx | 3,721 mm³ |
| Plastic modulus, Zpy | 3,721 mm³ |
| Radius of gyration, rx | 13.9 mm |
| Radius of gyration, ry | 13.9 mm |
| Principal maximum, Imax (derived) | 106,239 mm⁴ |
| Principal minimum, Imin (derived) | 27,075 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