ISMB 600 weight and dimensions

121 kg/m · 81.31 lb/ft

ISMB 600 is a 600 mm deep beam with a 210 mm flange, 12 mm web and 20.3 mm flange thickness. It weighs 121 kg per metre (81.31 lb/ft). It belongs to the ISMB medium weight beam series, Indian Standard (IS 808).

Many weight charts list ISMB 600 as 122.6 kg/m. That figure comes from the 1964 ISI handbook. The current standard, IS 808:2021, gives 121 kg/m (IS 808:1989: 123 kg/m).

ISMB 600 weight calculator

Total weight
—

Weight of standard lengths

Pieces6 m each (kg)12 m each (kg)
1726.01,452.0
53,630.07,260.0
107,260.014,520.0
2014,520.029,040.0
5036,300.072,600.0

Pieces per tonne

6 m lengths per metric tonne1.4
12 m lengths per metric tonne0.7
Length per tonne8.3 m

Useful for converting a tonnage order into a number of bars.

Surface area for painting

Per metre of length1.982 m²/m
Per foot of length6.50 ft²/ft
Per tonne of steel16.4 m²/t
A 12 m length23.78 m²

Outside perimeter × length, all faces, calculated from the dimensions. Use it to estimate paint, primer, fireproofing or galvanizing quantities.

Cross-section

ISMB 600 cross-section, drawn to scaleh 600b 210tw 12tf 20.3r 20

Drawn to scale. Dimensions in mm.

Dimensions

Depth h 600 mm 23.622 in
Flange width b 210 mm 8.268 in
Web thickness tw 12 mm 0.472 in
Flange thickness tf 20.3 mm 0.799 in
Root radius r 20 mm 0.787 in
Toe radius r2 10 mm 0.394 in
Flange slope (deg) 98°
Mass121 kg/m81.31 lb/ft

Section properties

PropertyValueUnit
Area154cm²
Moment of inertia Ix90,200cm⁴
Moment of inertia Iy2,570cm⁴
Elastic modulus Zx3,000cm³
Elastic modulus Zy245cm³
Plastic modulus Zpx3,450cm³
Plastic modulus Zpy418cm³
Radius of gyration rx24.10cm
Radius of gyration ry4.08cm
Torsion constant J198cm⁴

Equivalent sections in other standards

The closest sections by depth and weight. They are not direct substitutes: check bending, buckling and connection details before swapping one for another.

Overlay of ISMB 600, IPE 600, IPE 550, S24x80, drawn to the same scaleISMB 600IPE 600IPE 550S24x80ISMB 600 — 121 kg/mIPE 600 — 122.45 kg/mIPE 550 — 105.52 kg/mS24x80 — 119 kg/m

ISMB 600 and its closest equivalents, drawn over each other at the same scale.

SectionStandardDepth (mm)kg/mWeight vs ISMB 600
ISMB 600IS600121—
IPE 600 EN 600 122.45 +1.2%
IPE 550 EN 550 105.52 -12.8%
S24x80 AISC 610 119.00 -1.7%
W24x84 AISC 612 125.00 +3.3%

ISMB series weights

061121 ISMB 100: 8.95 kg/m 100 ISMB 125: 13.35 kg/m 125 ISMB 150: 14.96 kg/m 150 ISMB 175: 19.5 kg/m 175 ISMB 200: 24.17 kg/m 200 ISMB 225: 31.15 kg/m 225 ISMB 250: 37.3 kg/m 250 ISMB 300: 46.02 kg/m 300 ISMB 350: 52.33 kg/m 350 ISMB 400: 61.55 kg/m 400 ISMB 450: 72.38 kg/m 450 ISMB 500: 86.88 kg/m 500 ISMB 550: 103.64 kg/m 550 ISMB 600: 121 kg/m 600 kg/m

Next lighter: ISMB 550 (103.64 kg/m).

Stiffness and strength per kilogram

The elastic section modulus Zx governs bending strength. Dividing it by the weight shows how efficiently each size uses its steel: higher is better when weight is the cost driver.

Sectionkg/mIx (cm⁴)Zx (cm³)Zx per kg/m
ISMB 450 72.3830,4001,350.0 18.65
ISMB 500 86.8845,2001,800.0 20.72
ISMB 550 103.6464,9002,360.0 22.77
ISMB 600 121.0090,2003,000.0 24.79

Full table: ISMB weight chart (PDF).

How the weight is calculated

Mass per metre = cross-sectional area × density of steel = 154.00 cm² × 0.785 kg/(cm²·m) = 120.89 kg/m.

Rolled sections are made to a nominal mass, and the actual mass can differ by a few percent within the tolerances of IS 1852. For purchasing, invoicing by weight or checking deliveries, use the producer's stated mass.

Typical uses

Beams of this shape are used as floor and roof beams, lintels, crane girders and frame members, where bending about the strong axis governs.

Steel I-beams being erected as bridge girders over a highway
Photo: MassDOT, Wikimedia Commons, public domain.

Frequently asked questions

What is the weight of ISMB 600 per metre?

ISMB 600 weighs 121 kg/m, which is 81.31 lb/ft.

How much does a 6 m or 12 m length of ISMB 600 weigh?

A 6 m length weighs about 726.0 kg and a 12 m length about 1,452.0 kg.

Why do some weight charts show 122.6 kg/m for ISMB 600?

122.6 kg/m is the value in the 1964 ISI handbook SP 6(1). IS 808 was revised in 1989 and the section dimensions changed; IS 808:2021 gives 121 kg/m. Many charts still copy the old figure, so confirm which standard your supplier rolls to.

What is the equivalent of ISMB 600 in other standards?

By depth and weight the closest match is IPE 600 (122.45 kg/m, 600 mm deep). Check section properties before substituting one for the other.

Source: IS 808:2021; earlier values from IS 808:1989 and SP 6(1):1964. Values are nominal; verify with the producer before ordering.