S8×23 standard beam

Detailing dimensions and section properties from the AISC Shapes Database, 16th Edition. Values are shown to the nearest 1/16 in. as they appear on a shop drawing.

S8×23 measures 8 in. deep with a 4 1/8 in. flange, on a 7/16 in. web and 7/16 in. flanges.

At 23 lb per foot it is the heaviest of the 2 S8 sizes, which run from 18.4 to 23 lb/ft.

For strong-axis bending its section modulus is Sx = 16.2 in³ and its moment of inertia Ix = 64.7 in⁴, with a plastic modulus Zx = 19.2 in³.

Detailing dimensions

Depth (d)8"
Flange width (bf)4 1/8"
Web thickness (tw)7/16"
Flange thickness (tf)7/16"
k (detailing)1"
Workable gage (g)2 1/4"

Section properties

Weight23 lb/ft
Area (A)6.76 in²
Ix64.7 in⁴
Sx16.2 in³
Zx19.2 in³
rx3.09 in
Iy4.27 in⁴
Sy2.05 in³
Zy3.67 in³
ry0.795 in
J0.55 in⁴

Other S8 sizes

Same nominal size, different weight — useful when you are checking a substitution or a lighter section.

S8×18.4

Similar weight standard beams

Comparable 23 lb/ft sections in other standard beam sizes.

S10×25.425.4 lb/ft · Sx 24.6 in³S6×17.2517.25 lb/ft · Sx 8.74 in³S12×31.831.8 lb/ft · Sx 36.2 in³S6×12.512.5 lb/ft · Sx 7.34 in³S12×3535 lb/ft · Sx 38.1 in³S10×3535 lb/ft · Sx 29.4 in³S5×1010 lb/ft · Sx 4.9 in³S4×9.59.5 lb/ft · Sx 3.38 in³

Detailing values are rounded to the nearest 1/16 in. per the AISC Steel Construction Manual. Verify critical dimensions against the current Manual before fabrication. Need S8×23 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Standard beams · Steel Beam Size Chart

Interactive drawing