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Structural Tolerances
Permissible Variations In Cross Section for W, HR S, M, C and MC Shapes
|
Shape |
Section
Nominal Sizes
(inches) |
Depth |
(inches) |
Flange Width (inches) |
Flange Out-
of-Square,
max. in.AB |
|
Over
Theoretical |
Under
Theoretical |
Over
Theoretical |
Under
Theoretical |
|
W and HP |
Up thru 12 |
1/8 |
1/8 |
1/4 |
3/16 |
1/4 |
|
|
Over 12 |
1/8 |
1/8 |
1/4 |
3/16 |
5/16 |
|
S and M |
3 thru 7 |
3/32 |
1/16 |
1/8 |
1/8 |
1/32 |
|
|
Over 7 thru 14 |
1/8 |
3/32 |
5/32 |
5/32 |
1/32 |
|
|
Over 14 thru 24 |
3/16 |
1/8 |
3/16 |
3/16 |
1/32 |
|
C and MC |
Up thru 1-1/2 |
1/32 |
1/32 |
1/32 |
1/32 |
1/32 |
|
|
Over 1-1/2 up to 3 |
1/16 |
1/16 |
1/16 |
1/16 |
1/32 |
|
|
3 thru 7 |
3/32 |
1/16 |
1/8 |
1/8 |
1/32 |
|
|
Over 7 thru 14 |
1/8 |
3/32 |
1/8 |
5/32 |
1/32 |
|
|
Over 14 |
3/16 |
1/8 |
1/8 |
3/16 |
1/32 |
* Applies when flanges of channels are toed in or out. For channels 5/8 and under in depth, the permissible out-of-square is 3/64 in./in. of depth.
B Tolerance is per inch of fiance width for S. M. C. and MC shapes.
Structural Tolerances
Permissible Variations In Cross Section for Angles (L Shapes]
|
|
|
Depth (inches) |
Flange Width or Length of
Leg (inches) |
Out of |
Flange Width or Length of Leg (inches) |
|
|
Nominal Sizes |
Over Under |
Over |
Under |
Square per |
Up thru |
Over 3/16 |
Over |
|
Shape |
(inches) |
Theoretical Theoretical |
Theoretical |
Theoretical |
Inch, In. |
3/16 |
thru 3/8 |
3/8 |
|
Angles* |
Up thru 1 |
|
1/32 |
1/32 |
3/128 |
0.008 |
0.010 |
|
|
(L Shapes) |
Over 1 thru 2 |
|
3/64 |
3/64 |
3/128B |
0.010 |
0.010 |
0.012 |
|
|
Over 2 thru 3 |
|
1/16 |
1/16 |
3/128B |
0.012 |
0.015 |
0.015 |
|
|
Over 3 thru 4 |
|
18 |
3/32 |
3/128 |
|
|
|
|
|
Over 4 thru 6 |
|
1/8 |
1/8 |
3/128 |
|
|
|
|
|
Over 6 |
|
3/16 |
1/8 |
3/128 |
|
|
|
* For unequal leg angles, longer leg determines classifications.
a 3/128 in./in. = 1-1/2 deg.
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