ISA 90×90×8 Weight, Dimensions and IS 808 Properties
ISA 90×90×8 weighs 10.8 kg per metre as per IS 808:1989.
- One 6-metre length weighs 64.8 kg · one 12-metre length weighs 129.6 kg
- Leg 90 mm × thickness 8 mm · root radius 10.0 mm
- Cross-sectional area 13.78 cm² · Iuu = 96.5 cm⁴
ISA 90×90×8 is a medium-heavy structural equal-leg angle in IS 808:1989. At 10.8 kg/m with a 90 mm leg it is used for primary truss chord members, back-to-back compound column sections, and heavy bracing members in medium to large industrial structures.
ISA 90×90×8 Weight Calculator
Enter the total length in metres to calculate weight.
ISA 90×90×8 — Weight Calculator
IS 808:1989 Dimensions and Sectional Properties
| Property | Symbol | Unit | Value |
|---|---|---|---|
| Leg length | A | mm | 90 |
| Thickness | t | mm | 8 |
| Root radius | r1 | mm | 10.0 |
| Cross-sectional area | A | cm² | 13.78 |
| Mass per metre | — | kg/m | 10.8 |
| Centroid distance (Cxx = Cyy) | Cxx | cm | 2.17 |
| Moment of inertia (u–u, max) | Iuu | cm⁴ | 96.5 |
| Moment of inertia (v–v, min) | Ivv | cm⁴ | 25.07 |
| Elastic section modulus (u–u) | Zuu | cm³ | 15.3 |
| Radius of gyration (u–u) | ruu | cm | 2.65 |
| Radius of gyration (v–v) | rvv | cm | 1.35 |
Dimensions and properties as per IS 808:1989 (Reaffirmed 2001). Mass tolerance: ±3% per piece as per IS 808. u–u is the major principal axis at 45° to both legs; v–v is the minor principal axis. Zvv is not published in IS 808:1989 for angle sections.
Common Applications of ISA 90×90×8
ISA 90×90×8 is used for primary truss chord members in 15–20 m span structures, back-to-back compound column legs under high axial load, heavy diagonal wind bracing, bolted splice connections in primary frames, and gusset plate connections with high bearing requirements. Available from JSPL, Tata Steel, and SAIL.
Worked Example
A structural engineer in Mumbai specifies ISA 90×90×8 for 12 top chord members, each 6 m long, for 20 m span Pratt trusses in a large warehouse. Total length = 12 × 6 = 72 m. Weight = 72 × 10.8 = 777.6 kg (0.778 tonnes). At ₹62,000 per tonne (Mumbai, May 2026), material cost is approximately ₹48,211.
Related ISA Equal Angle Sections
Compare with adjacent sizes: ISA 80×80×8 (9.6 kg/m) · ISA 90×90×10 (13.3 kg/m). For all ISA equal angles see the Section Reference Library →
Frequently Asked Questions
What is the weight of ISA 90×90×8 per metre?
ISA 90×90×8 weighs 10.8 kg per metre as specified in IS 808:1989. For a standard 6-metre length, the total weight is 64.8 kg. For a 12-metre length, total weight is 129.6 kg.
ISA 90×90×8 ka weight per meter kitna hota hai?
IS 808:1989 standard ke according, ISA 90×90×8 ka weight 10.8 kg/m hota hai. 6 metre ki ek length ka total weight 64.8 kg hoga. Zyada accurate calculation ke liye upar diya gaya calculator use karein.
What are the dimensions of ISA 90×90×8?
ISA 90×90×8 per IS 808:1989 has a leg length of 90 mm, thickness of 8 mm, and root radius of 10.0 mm. The cross-sectional area is 13.78 cm².
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