ISLB – light beams

ISLB 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 = 15tf = 15tw = 9.9tw = 9.9
Cross-section, to scaledimensions in mm

Dimensions

Depthd
550mm
Flange widthbf
190mm
Web thicknesstw
9.9mm
Flange thicknesstf
15mm
Root radiusr1
18mm
Toe radiusr2
9mm

Mass and area

Mass per lengthm
86.33kg/m
Cross-sectional areaA
10,997mm²
Published area (standard)A pub.
10,900mm²
Outside perimeterP
1,760mm

Strong axis x–x

Moment of inertiaIx
531.710⁶ mm⁴
Elastic section modulusSx
1,93310³ mm³
Plastic section modulusZx
2,22810³ mm³
Radius of gyrationrx
219.9mm

Weak axis y–y

Moment of inertiaIy
13.3510⁶ mm⁴
Elastic section modulusSy
140.610³ mm³
Plastic section modulusZy
246.310³ mm³
Radius of gyrationry
34.85mm

Equivalents in other standards