PFC – parallel-flange channels

180x75x20

Standard: BS 4-1:2005Source: Primary geometry (h, b, tw, tf, r) — calculated properties (exact engine)
Range derived from BS 4-1; to be confirmed with the SAISC Red Book.
xybf = 75d = 180tf = 10.5tf = 10.5tw = 6tw = 6
Cross-section, to scaledimensions in mm

Dimensions

Depthd
180mm
Flange widthbf
75mm
Web thicknesstw
6mm
Flange thicknesstf
10.5mm
Root radiusr
12mm

Mass and area

Mass per lengthm
20.34kg/m
Cross-sectional areaA
2,591mm²
Outside perimeterP
637.7mm

Strong axis x–x

Moment of inertiaIx
13.710⁶ mm⁴
Elastic section modulusSx
152.210³ mm³
Plastic section modulusZx
176.210³ mm³
Radius of gyrationrx
72.72mm

Weak axis y–y

Moment of inertiaIy
1.46410⁶ mm⁴
Elastic section modulusSy
28.7610³ mm³
Plastic section modulusZy
51.9510³ mm³
Radius of gyrationry
23.77mm

Torsion and stability

Torsional constantJ
73.4310³ mm⁴

Centers

Centroidx̄
24.11mm

Equivalents in other standards