ISA 55×55×6 Weight, Dimensions and IS 808 Properties
ISA 55×55×6 weighs 4.9 kg per metre as per IS 808:1989.
- One 6-metre length weighs 29.4 kg · one 12-metre length weighs 58.8 kg
- Leg 55 mm × thickness 6 mm · root radius 7.0 mm
- Cross-sectional area 6.29 cm² · Iuu = 16.0 cm⁴
ISA 55×55×6 is a structural equal-leg angle in IS 808:1989. At 4.9 kg/m with a 55 mm leg it fills the gap between ISA 50×50×6 and ISA 60×60×6, used for light truss chord members and secondary bracing in structures up to 10 m span.
ISA 55×55×6 Weight Calculator
Enter the total length in metres to calculate weight.
ISA 55×55×6 — Weight Calculator
IS 808:1989 Dimensions and Sectional Properties
| Property | Symbol | Unit | Value |
|---|---|---|---|
| Leg length | A | mm | 55 |
| Thickness | t | mm | 6 |
| Root radius | r1 | mm | 7.0 |
| Cross-sectional area | A | cm² | 6.29 |
| Mass per metre | — | kg/m | 4.9 |
| Centroid distance (Cxx = Cyy) | Cxx | cm | 1.38 |
| Moment of inertia (u–u, max) | Iuu | cm⁴ | 16.0 |
| Moment of inertia (v–v, min) | Ivv | cm⁴ | 4.17 |
| Elastic section modulus (u–u) | Zuu | cm³ | 4.11 |
| Radius of gyration (u–u) | ruu | cm | 1.59 |
| Radius of gyration (v–v) | rvv | cm | 0.81 |
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 55×55×6
ISA 55×55×6 is used for light truss chord and web members, secondary bracing in portal frames, back-to-back compound angle struts, and gusset plate connections. Stocked by JSPL and Tata Steel in IS 2062 E250 grade.
Worked Example
A contractor in Coimbatore needs 16 bottom chord members of ISA 55×55×6, each 3 m long, for a set of 8 m span roof trusses. Total length = 16 × 3 = 48 m. Weight = 48 × 4.9 = 235.2 kg. At ₹62,000 per tonne (Coimbatore, May 2026), material cost is approximately ₹14,582.
Related ISA Equal Angle Sections
Compare with adjacent sizes: ISA 50×50×6 (4.5 kg/m) · ISA 60×60×6 (5.4 kg/m). For all ISA equal angles see the Section Reference Library →
Frequently Asked Questions
What is the weight of ISA 55×55×6 per metre?
ISA 55×55×6 weighs 4.9 kg per metre as specified in IS 808:1989. For a standard 6-metre length, the total weight is 29.4 kg. For a 12-metre length, total weight is 58.8 kg.
ISA 55×55×6 ka weight per meter kitna hota hai?
IS 808:1989 standard ke according, ISA 55×55×6 ka weight 4.9 kg/m hota hai. 6 metre ki ek length ka total weight 29.4 kg hoga. Zyada accurate calculation ke liye upar diya gaya calculator use karein.
What are the dimensions of ISA 55×55×6?
ISA 55×55×6 per IS 808:1989 has a leg length of 55 mm, thickness of 6 mm, and root radius of 7.0 mm. The cross-sectional area is 6.29 cm².
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