ISA 65×50×5 Weight, Dimensions and IS 808 Properties
ISA 65×50×5 weighs 4.4 kg per metre as per IS 808:1989.
- One 6-metre length weighs 26.4 kg · one 12-metre length weighs 52.8 kg
- Long leg 65 mm · short leg 50 mm · thickness 5 mm · area 5.57 cm²
- Maximum principal moment of inertia Iuu = 28.86 cm⁴
ISA 65×50×5 is a standard unequal-leg angle in IS 808:1989. At 4.4 kg/m with a 65 mm long leg and 50 mm short leg, it is used for diagonal bracing in light portal frames, secondary connection angles at girt-to-column joints, and staircase nosing angles.
ISA 65×50×5 Weight Calculator
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ISA 65×50×5 — Weight Calculator
IS 808:1989 Dimensions and Sectional Properties
| Property | Symbol | Unit | Value |
|---|---|---|---|
| Long leg | A | mm | 65 |
| Short leg | B | mm | 50 |
| Thickness | t | mm | 5 |
| Cross-sectional area | A | cm² | 5.57 |
| Mass per metre | — | kg/m | 4.4 |
| Centroid from back of long leg | Cxx | cm | 1.55 |
| Centroid from back of short leg | Cyy | cm | 1.05 |
| Moment of inertia (x–x) | Ixx | cm⁴ | 24.6 |
| Moment of inertia (y–y) | Iyy | cm⁴ | 9.39 |
| Moment of inertia (u–u, max principal) | Iuu | cm⁴ | 28.86 |
| Moment of inertia (v–v, min principal) | Ivv | cm⁴ | 5.13 |
| Elastic section modulus (x–x) | Zxx | cm³ | 5.46 |
| Elastic section modulus (y–y) | Zyy | cm³ | 2.63 |
| Radius of gyration (u–u) | ruu | cm | 2.28 |
| Radius of gyration (v–v) | rvv | cm | 0.96 |
| Tangent of principal axis angle | tan α | — | 0.53 |
Dimensions and properties as per IS 808:1989 (reaffirmed 2021). x–x axis is parallel to the long leg; y–y axis is parallel to the short leg; u–u is the maximum principal axis at angle α to x–x. Mass tolerance: ±3% per piece per IS 808.
Common Applications of ISA 65×50×5
ISA 65×50×5 is used for diagonal bracing in light portal frames, secondary connection angles at girt-to-column joints, and staircase nosing angles. General steel merchants and angle stockists carry this size in IS 2062 E250 grade in 6 m and 12 m lengths. JSPL, SAIL, and RINL (Vizag Steel) all roll this designation to IS 808:1989 as standard stock.
Worked Example
A fabricator in Vadodara needs 60 diagonal bracing angles in a 12-bay light portal frame using ISA 65×50×5, each 1200 mm long. Total length = 60 × 1.2 = 72.0 m. Weight = 72.0 × 4.4 = 316.8 kg. At ₹63,000 per tonne (Vadodara, May 2026), material cost is approximately ₹19,958 before cutting charges.
Related ISA Unequal Angle Sections
Compare with adjacent sizes: ISA 60×40×5 (3.8 kg/m) · ISA 65×50×6 (5.2 kg/m). For all ISA unequal angles see the Section Reference Library →
Frequently Asked Questions
What is the weight of ISA 65×50×5 per metre?
ISA 65×50×5 weighs 4.4 kg per metre as specified in IS 808:1989. For a standard 6-metre length, the total weight is 26.4 kg. For a 12-metre length, total weight is 52.8 kg.
ISA 65×50×5 ka weight per meter kitna hota hai?
IS 808:1989 standard ke according, ISA 65×50×5 ka weight 4.4 kg/m hota hai. 6 metre ki ek length ka total weight 26.4 kg hoga. Zyada accurate calculation ke liye upar diya gaya calculator use karein.
What are the dimensions of ISA 65×50×5?
ISA 65×50×5 per IS 808:1989 has a long leg of 65 mm, short leg of 50 mm, thickness of 5 mm, and cross-sectional area of 5.57 cm².
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