Carbon & Alloys

American Standard Beams

Standard I Beams
Conforms to ASTM A36

Standard I Beams

Section No. Weight per Foot   Flange     a T k r grip Max Flange Fastener
Depth of Section Width Average Thickness Web Thickness Half Web Thickness
d bf tf tw tw
2
  lb in. in. in. in. in. in. in. in. in. in. in.
S3 x 5.7 3 2 3/8 1/4 3/16 1/16 1 1/8 1 3/4 5/8 .27 1/4  
7.5 3 2 1/2 1/4 3/8 3/16 1 1/8 1 3/4 5/8 .27 1/4  
S4 x 7.7 4 2 5/8 5/16 3/16 1/8 1 1/4 2 5/8 11/16 .29 5/16  
9.5 4 2 3/4 5/16 5/16 3/16 1 1/4 2 5/8 11/16 .29 5/16  
S5 x 10 5 3 5/16 3/16 1/8 1 3/8 3 1/2 3/4 .31 5/16  
S6 x 12.5 6 3 3/8 3/8 1/4 1/8 1 1/2 4 3/8 13/16 .33 5/16  
17.25 6 3 5/8 3/8 7/16 1/4 1 1/2 4 3/8 13/16 .33 3/8 5/8
S7 x 15.3 7 3 5/8 3/8 1/4 1/8 1 3/4 5 1/4 7/8 .35 3/8 5/8
S8 x 18.4 8 4 7/16 1/4 1/8 1 7/8 6 1 .37 7/16 3/4
23 8 4 1/8 7/16 7/16 1/4 1 7/8 6 1 .37 7/16 3/4
S10 x 25.4 10 4 5/8 1/2 5/16 1/8 2 1/8 7 3/4 1 1/8 .41 1/2 3/4
35 10 5 1/2 5/8 5/16 2 1/8 7 3/4 1 1/8 .41 1/2 3/4
S12 x 31.8 12 5 9/16 3/8 3/16 2 3/8 9 5/8 1 3/16 .45 1/2 3/4
35 12 5 1/8 9/16 7/16 3/16 2 3/8 9 5/8 1 3/16 .45 1/2 3/4
40.8 12 5 1/4 11/16 7/16 1/4 2 3/8 9 1/8 1 7/16 .56 5/8 3/4
50 12 5 1/2 11/16 11/16 5/16 2 3/8 9 1/8 1 7/16 .56 11/16 3/4
S15 x 42.9 15 5 1/2 5/8 7/16 3/16 2 1/2 12 1/4 1 3/8 .51 9/16 3/4
50 15 5 5/8 5/8 9/16 1/4 2 1/2 12 1/4 1 3/8 .51 9/16 3/4
S18 x 54.7 18 6 11/16 7/16 1/4 2 3/4 15 1 1/2 .56 11/16 7/8
70 18 6 1/4 11/16 11/16 3/8 2 3/4 15 1 1/2 .56 11/16 7/8
S20 x 66 20 6 1/4 13/16 1/2 1/4 2 7/8 16 3/4 1 5/8 .60 13/16 7/8
75 20 6 3/8 13/16 5/8 5/16 2 7/8 16 3/4 1 5/8 .60 13/16 7/8
86 20 1/4 7 15/16 11/16 5/16 3 1/4 16 3/4 1 3/4 .60 15/16 1
96 20 1/4 7 1/4 15/16 13/16 3/8 3 1/4 16 3/4 1 3/4 .60 15/16 1
S24 x 80 24 7 7/8 1/2 1/4 3 1/4 20 1/2 1 3/4 .60 7/8 1
90 24 7 1/8 7/8 5/8 5/16 3 1/4 20 1/2 1 3/4 .60 7/8 1


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