ISLB – light beams

ISLB 300

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 = 150d = 300tf = 9.4tf = 9.4tw = 6.7tw = 6.7
Cross-section, to scaledimensions in mm

Dimensions

Depthd
300mm
Flange widthbf
150mm
Web thicknesstw
6.7mm
Flange thicknesstf
9.4mm
Root radiusr1
15mm
Toe radiusr2
7.5mm

Mass and area

Mass per lengthm
38.06kg/m
Cross-sectional areaA
4,849mm²
Published area (standard)A pub.
4,800mm²
Outside perimeterP
1,148mm

Strong axis x–x

Moment of inertiaIx
74.6310⁶ mm⁴
Elastic section modulusSx
497.610³ mm³
Plastic section modulusZx
561.810³ mm³
Radius of gyrationrx
124.1mm

Weak axis y–y

Moment of inertiaIy
5.04510⁶ mm⁴
Elastic section modulusSy
67.2710³ mm³
Plastic section modulusZy
106.710³ mm³
Radius of gyrationry
32.26mm

Slenderness ratios

Flange slope used%
0

Equivalents in other standards