ISLB – light beams

ISLB 275

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 = 275tf = 8.8tf = 8.8tw = 6.4tw = 6.4
Cross-section, to scaledimensions in mm

Dimensions

Depthd
275mm
Flange widthbf
140mm
Web thicknesstw
6.4mm
Flange thicknesstf
8.8mm
Root radiusr1
14mm
Toe radiusr2
7mm

Mass and area

Mass per lengthm
33.26kg/m
Cross-sectional areaA
4,238mm²
Published area (standard)A pub.
4,200mm²
Outside perimeterP
1,061mm

Strong axis x–x

Moment of inertiaIx
54.710⁶ mm⁴
Elastic section modulusSx
397.810³ mm³
Plastic section modulusZx
449.610³ mm³
Radius of gyrationrx
113.6mm

Weak axis y–y

Moment of inertiaIy
3.84110⁶ mm⁴
Elastic section modulusSy
54.8710³ mm³
Plastic section modulusZy
87.0610³ mm³
Radius of gyrationry
30.11mm

Slenderness ratios

Flange slope used%
0

Equivalents in other standards