S24×100 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.

S24×100 measures 24 in. deep with a 7 1/4 in. flange, on a 3/4 in. web and 7/8 in. flanges.

At 100 lb per foot it is one of the 5 S24 sizes, which run from 80 to 121 lb/ft.

For strong-axis bending its section modulus is Sx = 199 in³ and its moment of inertia Ix = 2380 in⁴, with a plastic modulus Zx = 239 in³.

Detailing dimensions

Depth (d)24"
Flange width (bf)7 1/4"
Web thickness (tw)3/4"
Flange thickness (tf)7/8"
k (detailing)1 3/4"
Workable gage (g)4"

Section properties

Weight100 lb/ft
Area (A)29.3 in²
Ix2380 in⁴
Sx199 in³
Zx239 in³
rx9.01 in
Iy47.4 in⁴
Sy13.1 in³
Zy24 in³
ry1.27 in
J7.59 in⁴

Other S24 sizes

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

S24×80S24×90S24×106S24×121

Similar weight standard beams

Comparable 100 lb/ft sections in other standard beam sizes.

S20×9696 lb/ft · Sx 165 in³S20×8686 lb/ft · Sx 155 in³S20×7575 lb/ft · Sx 128 in³S18×7070 lb/ft · Sx 103 in³S20×6666 lb/ft · Sx 119 in³S18×54.754.7 lb/ft · Sx 89 in³S15×5050 lb/ft · Sx 64.7 in³S12×5050 lb/ft · Sx 50.6 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 S24×100 cut, formed, or fabricated? Huntington Steel & Supply Co.

Browse more: Standard beams · Steel Beam Size Chart

Interactive drawing