ISWB – wide-flange beams

ISWB 250

Standard: IS 808:2021Source: IS 808:2021 dimensions (BIS) — calculated properties, flange slope 98° (8°)
Tapered-flange sections; flange thickness measured at the quarter of the flange.
xybf = 200d = 250tf = 9tf = 9tw = 6.7tw = 6.7
Cross-section, to scaledimensions in mm

Dimensions

Depthd
250mm
Flange widthbf
200mm
Web thicknesstw
6.7mm
Flange thicknesstf
9mm
Root radiusr1
10mm
Toe radiusr2
5mm

Mass and area

Mass per lengthm
40.89kg/m
Cross-sectional areaA
5,209mm²
Published area (standard)A pub.
5,200mm²
Outside perimeterP
1,239mm

Strong axis x–x

Moment of inertiaIx
59.7310⁶ mm⁴
Elastic section modulusSx
477.810³ mm³
Plastic section modulusZx
529.110³ mm³
Radius of gyrationrx
107.1mm

Weak axis y–y

Moment of inertiaIy
9.65610⁶ mm⁴
Elastic section modulusSy
96.5610³ mm³
Plastic section modulusZy
160.210³ mm³
Radius of gyrationry
43.05mm

Slenderness ratios

Flange slope used%
6.99

Equivalents in other standards