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Steel beam sizes
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United States
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American standard beams
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S18
S18 series
2 american standard beams sections of nominal size S18, from AISC Shapes Database v16.0.
S18 sections
Designation
Weight (lb/ft)
Depth (in)
Flange (in)
tw (in)
tf (in)
Iₓ (in⁴)
Zₓ (in³)
S18x54.7
54.7
18
6
0.461
0.691
801
104
S18x70
70
18
6.25
0.711
0.691
923
124
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S18 series — American standard beams | Kannamwar Engineering