ISMB 100 Weight, Dimensions and IS 808 Properties
ISMB 100 weighs 10.6 kg per metre as per IS 808:1989.
- One 6-metre length weighs 63.6 kg · one 12-metre length weighs 127.2 kg
- Overall depth 100 mm · flange width 75 mm · web thickness 4.0 mm
- Cross-sectional area 1,350 mm² · Ixx = 257.5 cm⁴
ISMB 100 is the smallest standard medium-weight beam in IS 808:1989. At 10.6 kg/m it is commonly used for light secondary beams, lintels, stair stringers, and machinery frames where a compact I-section with defined sectional properties is needed.
ISMB 100 Weight Calculator
Enter the total length in metres to calculate weight.
ISMB 100 — Weight Calculator
IS 808:1989 Dimensions and Sectional Properties
| Property | Symbol | Unit | Value |
|---|---|---|---|
| Overall depth | D | mm | 100 |
| Flange width | B | mm | 75 |
| Web thickness | tw | mm | 4.0 |
| Flange thickness | tf | mm | 7.2 |
| Cross-sectional area | A | mm² | 1,350 |
| Mass per metre | — | kg/m | 10.6 |
| Moment of inertia (x–x) | Ixx | cm⁴ | 257.5 |
| Moment of inertia (y–y) | Iyy | cm⁴ | 38.8 |
| Elastic section modulus (x–x) | Zxx | cm³ | 51.5 |
| Elastic section modulus (y–y) | Zyy | cm³ | 10.3 |
| Radius of gyration (x–x) | rxx | cm | 4.36 |
| Radius of gyration (y–y) | ryy | cm | 1.69 |
Dimensions and properties as per IS 808:1989 (reaffirmed 2021). Mass tolerance: ±2.5% per piece per IS 808.
Common Applications of ISMB 100
ISMB 100 is widely used in light structural work — lintels over door and window openings, secondary floor beams in mezzanine structures, stair stringers, and support frames for mechanical equipment. Its compact 100 × 75 mm profile makes it practical where depth is restricted. Tata Steel and SAIL both roll ISMB 100 to IS 808:1989 in IS 2062 E250 grade as standard stock.
Worked Example
A fabricator in Surat needs 18 lintels of ISMB 100, each 1.8 m long, for a ground-floor commercial fit-out. Total length = 18 × 1.8 = 32.4 m. Weight = 32.4 × 10.6 = 343.4 kg (0.343 tonnes). At a market rate of ₹58,000 per tonne (Surat, May 2026), the material cost is approximately ₹19,920 before cutting and transport.
Related ISMB Sections
Compare with adjacent sizes: Section Reference Library (no smaller ISMB) · ISMB 125 (13.1 kg/m). For all ISMB sizes see the Section Reference Library →
Frequently Asked Questions
What is the weight of ISMB 100 per metre?
ISMB 100 weighs 10.6 kg per metre as specified in IS 808:1989. For a standard 6-metre length, the total weight is 63.6 kg. For a 12-metre length, total weight is 127.2 kg.
ISMB 100 ka weight per meter kitna hota hai?
IS 808:1989 standard ke according, ISMB 100 ka weight 10.6 kg/m hota hai. 6 metre ki ek length ka total weight 63.6 kg hoga. Zyada accurate calculation ke liye upar diya gaya calculator use karein.
What are the dimensions of ISMB 100?
ISMB 100 per IS 808:1989 has an overall depth of 100 mm, flange width of 75 mm, web thickness of 4.0 mm, and flange thickness of 7.2 mm. The cross-sectional area is 1,350 mm².
Need weight for a different section type? Our free Metal Weight Calculator covers all IS 808 sections, pipes, bars, and hollow sections.
Try the Free Metal Weight Calculator →