S-Shapes (Std Beams)

S 18×70 (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 = 457 mm · b = 159 mm · tw = 18.1 mm · tf = 17.6 mm · G = 104 kg/m

ASTM A6 I/H section
Cross-Section Profile — S 18×70 (to scale)

All dimensions in mm · I/H section · G = 104 kg/m · ASTM A6

104
kg / m
132
A (cm²)
38400
Ix (cm⁴)
1690
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 457 mm
Width b 159 mm
Web thickness tw 18.1 mm
Flange thickness tf 17.6 mm
Area A 132 cm²
Mass per length G 104 kg/m
Second moment (x-x) Ix 38400 cm⁴
Elastic modulus (x-x) Sx 1690 cm³
Plastic modulus (x-x) Zx 2030 cm³
Radius (x-x) rx 17 cm
Second moment (y-y) Iy 999 cm⁴
Elastic modulus (y-y) Sy 126 cm³
Plastic modulus (y-y) Zy 234 cm³
Radius (y-y) ry 2.74 cm
Torsion constant It 171 cm⁴
Warping constant Iw 483000 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.