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ISLB 125

Light Beam9.9 kg/m

Indian Standard Light Beam — IS 808:2021 | Depth 125mm × Width 75mm

Cross-Section (mm)
12575tw=4.4tf=5.8
Weight Calculator
9.9 kg/m × 6m × 1 =
59.4kg
0.059tonnes
Section Properties
Depth (D)125 mm
Width (B)75 mm
Web Thickness (tw)4.4 mm
Flange Thickness (tf)5.8 mm
Weight per Metre9.9 kg/m
Cross-sectional Area12.59 cm²
Moment of Inertia (Ixx)366.1 cm⁴
Moment of Inertia (Iyy)29.5 cm⁴
Section Modulus (Zxx)58.6 cm³
Section Modulus (Zyy)7.9 cm³
Radius of Gyration (rxx)5.39 cm
Radius of Gyration (ryy)1.53 cm
Related Sections
ISLB 100
100mm × 75mm · 7.9 kg/m
Ixx 189.6 cm⁴ · Zxx 37.9 cm³
ISLB 150
150mm × 80mm · 12.1 kg/m
Ixx 651.7 cm⁴ · Zxx 86.9 cm³
Applicable IS Codes
IS 808:2021 — Hot Rolled Structural Steel SectionsIS 2062:2011 — Hot Rolled Structural SteelIS 800:2007 — General Construction in Steel
Frequently Asked Questions
Q.What is the weight of ISLB 125 per metre?

ISLB 125 weighs 9.9 kg per metre as per IS 808. For a standard 6m length, the total weight would be 59.4 kg.

Q.What are the dimensions of ISLB 125?

ISLB 125 has a depth of 125mm, flange width of 75mm, web thickness of 4.4mm, and flange thickness of 5.8mm.

Q.What is the moment of inertia of ISLB 125?

The moment of inertia of ISLB 125 is Ixx = 366.1 cm⁴ (major axis) and Iyy = 29.5 cm⁴ (minor axis).

Q.When should I use ISLB 125?

ISLB 125 (Light Beam) is typically used for secondary beams, light-duty beams, and window/door lintels. It provides a section modulus of Zxx = 58.6 cm³, suitable for beams with moderate bending requirements.

Q.How much does a 6 metre ISLB 125 weigh?

A 6m length of ISLB 125 weighs 59.4 kg (0.059 tonnes). Weight formula: 9.9 kg/m × 6m = 59.4 kg.

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