ISA 75×50×8 Weight, Dimensions and IS 808 Properties
ISA 75×50×8 weighs 7.4 kg per metre as per IS 808:1989.
- One 6-metre length weighs 44.4 kg · one 12-metre length weighs 88.8 kg
- Long leg 75 mm · short leg 50 mm · thickness 8 mm · area 9.44 cm²
- Maximum principal moment of inertia Iuu = 58.24 cm⁴
ISA 75×50×8 is a standard unequal-leg angle in IS 808:1989. At 7.4 kg/m with a 75 mm long leg and 50 mm short leg, it is used for heavily loaded purlin cleats, diagonal bracing in medium portal frames, and gusset-plate connections at truss panel points where the 8 mm thickness provides adequate weld length.
ISA 75×50×8 Weight Calculator
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ISA 75×50×8 — Weight Calculator
IS 808:1989 Dimensions and Sectional Properties
| Property | Symbol | Unit | Value |
|---|---|---|---|
| Long leg | A | mm | 75 |
| Short leg | B | mm | 50 |
| Thickness | t | mm | 8 |
| Cross-sectional area | A | cm² | 9.44 |
| Mass per metre | — | kg/m | 7.4 |
| Centroid from back of long leg | Cxx | cm | 1.9 |
| Centroid from back of short leg | Cyy | cm | 1.05 |
| Moment of inertia (x–x) | Ixx | cm⁴ | 53.4 |
| Moment of inertia (y–y) | Iyy | cm⁴ | 13.27 |
| Moment of inertia (u–u, max principal) | Iuu | cm⁴ | 58.24 |
| Moment of inertia (v–v, min principal) | Ivv | cm⁴ | 8.43 |
| Elastic section modulus (x–x) | Zxx | cm³ | 10.45 |
| Elastic section modulus (y–y) | Zyy | cm³ | 3.88 |
| Radius of gyration (u–u) | ruu | cm | 2.48 |
| Radius of gyration (v–v) | rvv | cm | 0.94 |
| Tangent of principal axis angle | tan α | — | 0.337 |
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 75×50×8
ISA 75×50×8 is used for heavily loaded purlin cleats, diagonal bracing in medium portal frames, and gusset-plate connections at truss panel points where the 8 mm thickness provides adequate weld length. 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 Mumbai needs 30 heavily loaded purlin cleats for a cold-storage facility using ISA 75×50×8, each 250 mm long. Total length = 30 × 0.25 = 7.5 m. Weight = 7.5 × 7.4 = 55.5 kg. At ₹63,000 per tonne (Mumbai, May 2026), material cost is approximately ₹3,496 before cutting charges.
Related ISA Unequal Angle Sections
Compare with adjacent sizes: ISA 75×50×6 (5.7 kg/m) · ISA 80×60×6 (6.5 kg/m). For all ISA unequal angles see the Section Reference Library →
Frequently Asked Questions
What is the weight of ISA 75×50×8 per metre?
ISA 75×50×8 weighs 7.4 kg per metre as specified in IS 808:1989. For a standard 6-metre length, the total weight is 44.4 kg. For a 12-metre length, total weight is 88.8 kg.
ISA 75×50×8 ka weight per meter kitna hota hai?
IS 808:1989 standard ke according, ISA 75×50×8 ka weight 7.4 kg/m hota hai. 6 metre ki ek length ka total weight 44.4 kg hoga. Zyada accurate calculation ke liye upar diya gaya calculator use karein.
What are the dimensions of ISA 75×50×8?
ISA 75×50×8 per IS 808:1989 has a long leg of 75 mm, short leg of 50 mm, thickness of 8 mm, and cross-sectional area of 9.44 cm².
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