W-Shapes (ASTM A6)

W 18×258 (ASTM A6)

Source: AISC Shapes Database v16.0. Verified fields: A, G, It, Iw, Iy, Iz, Wply, Wplz, Wy, Wz, b, h, iy, iz, tf, tw. Other fields remain unverified unless identified as calculated. Native AISC x-x maps to stored major Iy; native y-y maps to stored minor Iz. Display uses native x-x/y-y.

h = 546 mm · b = 300 mm · tw = 32.5 mm · tf = 58.4 mm · G = 384 kg/m

ASTM A6 I/H section
Cross-Section Profile — W 18×258 (to scale)

All dimensions in mm · I/H section · G = 384 kg/m · ASTM A6

384
kg / m
490
A (cm²)
229000
Ix (cm⁴)
8420
Sx (cm³)

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

Section Properties

Overall depth h 546 mm
Width b 300 mm
Web thickness tw 32.5 mm
Flange thickness tf 58.4 mm
Area A 490 cm²
Mass per length G 384 kg/m
Second moment (x-x) Ix 229000 cm⁴
Elastic modulus (x-x) Sx 8420 cm³
Plastic modulus (x-x) Zx 10000 cm³
Radius (x-x) rx 21.7 cm
Second moment (y-y) Iy 26100 cm⁴
Elastic modulus (y-y) Sy 1750 cm³
Plastic modulus (y-y) Zy 2720 cm³
Radius (y-y) ry 7.32 cm
Torsion constant It 4290 cm⁴
Warping constant Iw 15500000 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.