ISMB – medium beams

ISMB 550

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 = 190d = 550tf = 19.3tf = 19.3tw = 11.2tw = 11.2
Cross-section, to scaledimensions in mm

Dimensions

Depthd
550mm
Flange widthbf
190mm
Web thicknesstw
11.2mm
Flange thicknesstf
19.3mm
Root radiusr1
18mm
Toe radiusr2
9mm

Mass and area

Mass per lengthm
103.7kg/m
Cross-sectional areaA
13,211mm²
Published area (standard)A pub.
13,200mm²
Outside perimeterP
1,758mm

Strong axis x–x

Moment of inertiaIx
648.910⁶ mm⁴
Elastic section modulusSx
2,36010³ mm³
Plastic section modulusZx
2,71210³ mm³
Radius of gyrationrx
221.6mm

Weak axis y–y

Moment of inertiaIy
18.3410⁶ mm⁴
Elastic section modulusSy
193.110³ mm³
Plastic section modulusZy
328.110³ mm³
Radius of gyrationry
37.26mm

Equivalents in other standards