ISMB – medium beams

ISMB 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 = 125d = 250tf = 12.5tf = 12.5tw = 6.9tw = 6.9
Cross-section, to scaledimensions in mm

Dimensions

Depthd
250mm
Flange widthbf
125mm
Web thicknesstw
6.9mm
Flange thicknesstf
12.5mm
Root radiusr1
13mm
Toe radiusr2
6.5mm

Mass and area

Mass per lengthm
37.33kg/m
Cross-sectional areaA
4,755mm²
Published area (standard)A pub.
4,750mm²
Outside perimeterP
931.4mm

Strong axis x–x

Moment of inertiaIx
51.3210⁶ mm⁴
Elastic section modulusSx
410.510³ mm³
Plastic section modulusZx
465.710³ mm³
Radius of gyrationrx
103.9mm

Weak axis y–y

Moment of inertiaIy
3.34610⁶ mm⁴
Elastic section modulusSy
53.5310³ mm³
Plastic section modulusZy
89.7110³ mm³
Radius of gyrationry
26.52mm

Equivalents in other standards