A.I.S.C.
HOT-ROLLED STRUCTURAL STEEL SHAPE DESIGNATIONS

New Designation

Type of Shape

Old designation

W 24
x 76

W
shape

24
WF 76

W 14
x 26

W
shape

14 B
26

S 24
x 100

S
shape

24 I
100

M 8
x 18.5

M
shape

8 M
18.5

M 10
x 9

M
shape

10
JR 9.0

M 8
x 34.3

M
shape

8 x
8 M 34.3

C 12
x 20.7

American Std. Channel

12 C
20.7

MC
12 x 45

Miscellaneous Channel

12 x
4 C 45.0

MC
12 x 10.6

Miscellaneous Channel

12
JR C 10.6

HP
14 x 73

HP
shape

14
BP 73

L6 x
6 x 3/4

Equal Leg Angle

L 6
x 6 x 3/4

L6 x
4 x 5/8

Unequal Leg Angle

L 6
x 4 x 5/8

WT
12 x 38

Structural Tee

ST
12 WF 38

WT 7
x 13

Cut
from W shape

ST 7
B 13

ST
12 x 50

Cut
from S shape

ST
12 I 
50

MT 4
x 9.25

Cut
from M shape

ST 4
M 9.25

MT 5
x 4.5

Cut
from M shape

ST 5
JR 4.5

MT 4
x 17.15

Cut
from M shape

ST 4
M 17.15

PL ½
x 18

Plate

PL
18 X ½

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1

Square Bar

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1

Bar
1-1/4 Ο

Round Bar

Bar
1-1/4 Ο

Bar
2-1/2 x 1/2

Flat
Bar

Bar
2-1/2 x 1/2

Pipe
4 Std.

Pipe

Pipe
4 Std.

Pipe
4 x . Strong

Pipe

Pipe
4 x-Strong

Pipe
4 xx Strong

Pipe

Pipe
4 xx-Strong

TS 4
x 4 x .375

Structural Tubing: Square

Tube
4 x 4 x .375

TS 5
x 3 x .375

Rectangular

Tube
5 x 3 x .375

TS 3
OD x .250

Circular

Tube
3 OD x .250