ISLB – light beams

ISLB(P) 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 = 140d = 300tf = 11.6tf = 11.6tw = 7tw = 7
Cross-section, to scaledimensions in mm

Dimensions

Depthd
300mm
Flange widthbf
140mm
Web thicknesstw
7mm
Flange thicknesstf
11.6mm
Root radiusr1
15mm
Toe radiusr2
7.5mm

Mass and area

Mass per lengthm
41.52kg/m
Cross-sectional areaA
5,289mm²
Published area (standard)A pub.
5,280mm²
Outside perimeterP
1,084mm

Strong axis x–x

Moment of inertiaIx
81.3410⁶ mm⁴
Elastic section modulusSx
542.310³ mm³
Plastic section modulusZx
614.610³ mm³
Radius of gyrationrx
124mm

Weak axis y–y

Moment of inertiaIy
4.14410⁶ mm⁴
Elastic section modulusSy
59.210³ mm³
Plastic section modulusZy
101.810³ mm³
Radius of gyrationry
27.99mm

Equivalents in other standards