ISA 125×75×8 Weight, Dimensions and IS 808 Properties
ISA 125×75×8 weighs 12.1 kg per metre as per IS 808:1989.
- One 6-metre length weighs 72.6 kg · one 12-metre length weighs 145.2 kg
- Long leg 125 mm · short leg 75 mm · thickness 8 mm · area 15.36 cm²
- Maximum principal moment of inertia Iuu = 289.69 cm⁴
ISA 125×75×8 is a standard unequal-leg angle in IS 808:1989. At 12.1 kg/m with a 125 mm long leg and 75 mm short leg, it is used for bracing members in medium industrial portal frames, truss chord connection angles, and crane-gantry runway connection cleats where the longer 125 mm leg provides better bolt gauge.
ISA 125×75×8 Weight Calculator
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ISA 125×75×8 — Weight Calculator
IS 808:1989 Dimensions and Sectional Properties
| Property | Symbol | Unit | Value |
|---|---|---|---|
| Long leg | A | mm | 125 |
| Short leg | B | mm | 75 |
| Thickness | t | mm | 8 |
| Cross-sectional area | A | cm² | 15.36 |
| Mass per metre | — | kg/m | 12.1 |
| Centroid from back of long leg | Cxx | cm | 2.77 |
| Centroid from back of short leg | Cyy | cm | 1.43 |
| Moment of inertia (x–x) | Ixx | cm⁴ | 264.3 |
| Moment of inertia (y–y) | Iyy | cm⁴ | 54.52 |
| Moment of inertia (u–u, max principal) | Iuu | cm⁴ | 289.69 |
| Moment of inertia (v–v, min principal) | Ivv | cm⁴ | 29.13 |
| Elastic section modulus (x–x) | Zxx | cm³ | 30.69 |
| Elastic section modulus (y–y) | Zyy | cm³ | 9.9 |
| Radius of gyration (u–u) | ruu | cm | 4.34 |
| Radius of gyration (v–v) | rvv | cm | 1.38 |
| Tangent of principal axis angle | tan α | — | 0.305 |
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 125×75×8
ISA 125×75×8 is used for bracing members in medium industrial portal frames, truss chord connection angles, and crane-gantry runway connection cleats where the longer 125 mm leg provides better bolt gauge. 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 Nagpur needs 10 truss chord connection angles on a 20 m span portal frame using ISA 125×75×8, each 1600 mm long. Total length = 10 × 1.6 = 16.0 m. Weight = 16.0 × 12.1 = 193.6 kg. At ₹63,000 per tonne (Nagpur, May 2026), material cost is approximately ₹12,196 before cutting charges.
Related ISA Unequal Angle Sections
Compare with adjacent sizes: ISA 120×80×10 (14.9 kg/m) · ISA 125×75×10 (14.9 kg/m). For all ISA unequal angles see the Section Reference Library →
Frequently Asked Questions
What is the weight of ISA 125×75×8 per metre?
ISA 125×75×8 weighs 12.1 kg per metre as specified in IS 808:1989. For a standard 6-metre length, the total weight is 72.6 kg. For a 12-metre length, total weight is 145.2 kg.
ISA 125×75×8 ka weight per meter kitna hota hai?
IS 808:1989 standard ke according, ISA 125×75×8 ka weight 12.1 kg/m hota hai. 6 metre ki ek length ka total weight 72.6 kg hoga. Zyada accurate calculation ke liye upar diya gaya calculator use karein.
What are the dimensions of ISA 125×75×8?
ISA 125×75×8 per IS 808:1989 has a long leg of 125 mm, short leg of 75 mm, thickness of 8 mm, and cross-sectional area of 15.36 cm².
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