125×75×4 RHS Weight, Dimensions and IS 4923 Properties
125×75×4 RHS weighs 11.67 kg per metre as per IS 4923:1997.
- One 6-metre length weighs 70.02 kg · one 12-metre length weighs 140.04 kg
- 125 × 75 mm rectangular section · wall thickness 4.0 mm
- Cross-sectional area 14.87 cm² · Ixx = 170.5 cm⁴ · Iyy = 407.1 cm⁴
125×75×4 RHS is a standard rectangular hollow section manufactured to IS 4923:1997 by Tata Structura YST 310. At 11.67 kg/m it is used for intermediate portal frame beams and similar structural applications where higher stiffness is required about the major axis.
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IS 4923:1997 Dimensions and Sectional Properties
| Property | Symbol | Unit | Value |
|---|---|---|---|
| Outside width | B | mm | 125 |
| Outside height | H | mm | 75 |
| Wall thickness | t | mm | 4.0 |
| Cross-sectional area | A | cm² | 14.87 |
| Mass per metre | — | kg/m | 11.67 |
| Moment of inertia (x–x, about height axis) | Ixx | cm⁴ | 170.5 |
| Moment of inertia (y–y, about width axis) | Iyy | cm⁴ | 407.1 |
| Elastic section modulus (x–x) | Zxx | cm³ | 45.47 |
| Elastic section modulus (y–y) | Zyy | cm³ | 65.14 |
| Radius of gyration (x–x) | rxx | cm | 3.38 |
| Radius of gyration (y–y) | ryy | cm | 5.23 |
Outside dimensions and wall thickness as per IS 4923:1997. Cross-sectional area and mass per metre from IS 4923:1997 Table 4. Sectional properties calculated from IS 4923 geometry. x–x axis is about the height (H) direction; y–y axis is about the width (B) direction. RHS is not doubly symmetric — Ixx ≠ Iyy. Mass tolerance: ±6% per individual piece as per IS 4923:1997 Clause 10.
Common Applications of 125×75×4 RHS
125×75×4 RHS is used in intermediate portal frame beams and related structural framing. The rectangular hollow profile concentrates more material in the plane of bending, giving higher Iyy about the strong axis compared to an equal SHS. Tata Structura YST 310 supply this section in YST 310 and YST 355 grade to IS 4923:1997 from stock at major steel distributors.
Worked Example
A fabricator in Hyderabad needs 6 beams of 125×75×4 RHS, each 6.0 m long, for a intermediate portal frame beams. Total length = 6 × 6.0 = 36.0 m. Weight = 36.0 × 11.67 = 420.1 kg. At a market rate of ₹65,000 per tonne (May 2026), material cost is approximately ₹27,308 before cutting and fabrication.
Related IS 4923 Sections
Previous: 100×60×3.5 RHS (8.63 kg/m) · Next: 150×75×4 RHS (13.40 kg/m). For all hollow sections see the Section Reference Library →
Frequently Asked Questions
What is the weight of 125×75×4 RHS per metre?
125×75×4 RHS weighs 11.67 kg per metre as per IS 4923:1997. For a standard 6-metre length, the total weight is 70.02 kg. For a 12-metre length, total weight is 140.04 kg.
125×75×4 rectangular hollow section ka weight kitna hota hai?
IS 4923:1997 ke according, 125×75×4 rectangular hollow section ka weight 11.67 kg/m hota hai. 6 metre ki ek length ka total weight 70.02 kg hoga. Zyada accurate calculation ke liye upar diya gaya calculator use karein.
What are the dimensions and wall thickness of 125×75×4 RHS?
125×75×4 RHS per IS 4923:1997 has an outside width of 125 mm, outside height of 75 mm, and a wall thickness of 4.0 mm. The cross-sectional area is 14.87 cm². Mass tolerance is ±6% per piece as per IS 4923:1997 Clause 10.
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