UB (BS 4-1)

UB 610×305×238 (BS 4-1:2005)

Source: SCI Blue Book (BS EN 10365:2017). Verified fields: A, G, It, Iw, Iy, Iz, Wply, Wplz, Wy, Wz, b, h, iy, iz, r, tf, tw. Other fields remain unverified unless identified as calculated.

h = 635.8 mm · b = 311.4 mm · tw = 18.4 mm · tf = 31.4 mm · G = 238.1 kg/m

BS 4-1:2005 I/H section
Cross-Section Profile — UB 610×305×238 (to scale)

All dimensions in mm · I/H section · G = 238.1 kg/m · BS 4-1:2005

238.1
kg / m
303
A (cm²)
209000
Iy (cm⁴)
6590
Wy (cm³)

Reference values — verify against the current edition of the applicable standard or manufacturer's table before design use.

Section Properties

Overall depth h 635.8 mm
Width b 311.4 mm
Web thickness tw 18.4 mm
Flange thickness tf 31.4 mm
Root radius r 16.5 mm
Area A 303 cm²
Mass per length G 238.1 kg/m
Second moment (y-y) Iy 209000 cm⁴
Elastic modulus (y-y) Wy 6590 cm³
Plastic modulus (y-y) Wpl,y 7490 cm³
Radius (y-y) iy 26.3 cm
Second moment (z-z) Iz 15800 cm⁴
Elastic modulus (z-z) Wz 1020 cm³
Plastic modulus (z-z) Wpl,z 1570 cm³
Radius (z-z) iz 7.23 cm
Torsion constant It 785 cm⁴
Warping constant Iw 14500000 cm⁶

Using this section record

Read the axis labels before using inertia or modulus: the major and minor axes are not interchangeable. Dimensions are in millimetres; area is in cm², second moments in cm⁴, moduli in cm³ and radii in cm. Convert powers of length consistently when transferring values to a calculation.

A Source line covers only its listed verified fields. Other fields remain subject to verification. A dash is unavailable, never zero. Withheld values must not be inferred from the remaining dimensions. Nominal mass and dimensions are reference values rather than measured tolerances or procurement guarantees. Confirm the exact product, manufacturing route, grade and thickness with the manufacturer. Section properties alone do not establish member resistance: stability, effective length, connections and project design requirements need separate assessment.