|
CROSS SECTIONAL TOLERANCES
|
SHAPE |
DIMENSION |
TOLERANCE
% of Nominal |
MAXIMUM OR MINIMUM TOLERANCES |
| Angles |
t = thickness |
± 10% |
±0.010" min. |
| b = flange width |
± 5% |
±0.094" max. |
| d = depth |
± 5% |
±0.094" max. |
| Channels |
t = thickness |
± 10% |
±0.010" min. |
| b = flange width |
± 5% |
±0.094" max. |
| d = depth |
± 5% |
±0.094" max. |
| Beams |
t = thickness |
± 10% |
±0.010" min. |
| b = flange width |
± 5% |
±0.094" max. |
| d = depth |
± 5% |
±0.094" max. |
|
Flat
Sheet |
t = thickness |
± 10% |
±0.040" min. |
| b = flange width |
± 3% |
±0.094" max.
-0.187" min. |
CROSS SECTIONAL TOLERANCES
|
SHAPE |
DIMENSION |
OUTSIDE DIMENSION CONDITION |
TOLERANCES |
|
Round & Square Tube |
t = thickness |
Under 1" |
±20% |
|
1" and up |
±15% |
|
od = outside dimension |
Under 1" |
±0.020" |
|
1" and up |
±0.040" |
| Round Rod
& Square Bar |
od =
outside dimension |
Up to 3" |
±0.010" |
FLATNESS
|
Structural Shapes Rods, Bars, & Flat
Sheet |
Allowable deviation from flat |
|
Width |
All Thickness |
|
Up to 1" |
0.008" |
|
Over 1" |
0.008"/in. |
|
Hollow Shapes |
Allowable deviation from flat |
|
Width |
Thickness
0.125" to 0.188" |
Thickness
0.189" and over |
|
Up to 1" |
0.012"/in. |
0.008"/in. |
|
Over 1" |
0.012"/in. |
0.008"/in. |
STRAIGHTNESS (weight minimizing)
|
Angle, Beam And Channel |
Allowable deviation from straight |
|
All widths |
0.050"/ft. |
|
Rods and Bars |
Allowable deviation from straight |
|
Diameter/Depth |
Per Foot |
|
Up to 1" |
0.020" |
|
Over 1" |
0.040" |
|
Round, Square, and Rectangular Tube |
Allowable deviation from straight |
|
Diameter/Depth |
Per Foot |
|
Up to 2" |
0.020" |
|
Over 2" |
0.030" |
|
Flat Sheet And Plate |
Allowable deviation from straight |
|
All thickness and widths |
0.025"/ft. |
TWIST (weight minimizing)
|
All Profiles |
Allowable twist |
|
Width/Depth |
Per Foot |
Per Piece Max. |
|
Up to 1.499" |
tan 1° x width |
tan 7° x width |
|
1.500" to 2.999" |
tan 1/2° x width |
tan 5° x width |
|
3.000" and over |
tan 1/3° x width |
tan 3° x width |
ANGULARITY
|
All Profiles |
Allowable deviation from specific
angle |
|
Thickness up to 3/4" |
tan 1 1/2° x width of flange in inches |
CUT LENGTHS
|
All Profiles |
Allowable deviation from specific
length |
|
Up to 20' |
-0, +1/2"/cut length* |
|
Over 20' to 50' |
-0, +1"/cut length |
* All parts being cut from stock
must allow for blade width.
SQUARENESS OF
ENDCUT
|
All Profiles |
Allowable deviation from square |
|
All thicknesses |
tan of 1° x width in inches |
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