thermoset sheet tolerances

 

Thickness

All
Glass
Grades

All
GPO
Grades

All
Paper
Grades

C
Canvas
Grade

CE
Canvas
Grade

L
Linen
Grade

LE
Linen
Grade

Fractional
inches

Decimal
inches

-

.005"

±.001"

-

-

-

-

-

-

-

.010"

±.002"

-

±.002"

-

-

±.003"

±.003"

-

.015"

±.003"

-

±.0025"

-

-

±.0035"

±.0035"

-

.020"

±.004"

-

±.003"

-

-

±.004"

±.004

-

.025"

±.0045"

-

±.0035"

-

-

±.004"

±.004"

1/32"

.031"

±.0065"

±.0075"

±.0035"

±.0065"

±.0065"

±.005"

±.005"

 

Thickness

All
Glass
Grades

All
GPO
Grades

All
Paper
Grades

C
Canvas
Grade

CE
Canvas
Grade

L
Linen
Grade

LE
Linen
Grade

Fractional
inches

Decimal
inches

3/64"

.047"

±.0075"

-

±.0045"

±.0075"

±.0075"

±.0055"

±.0055"

1/16"

.062"

±.0075"

±.0075"

±.005"

±.0075"

±.0075"

±.006"

±.006"

3/32"

.093"

±.009"

±.009"

±.007"

±.009"

±.009"

±.007"

±.007"

1/8"

.125"

±.012"

±.010"

±.008"

±.010"

±.010"

±.008"

±.008"

5/32"

.156"

±.015"

±.011"

±.009"

±.011"

±.011"

±.009"

±.009"

3/16"

.187"

±.019"

±.0125"

±.010"

±.0125"

±.0125"

±.010"

±.010"

 

(+ only)

 

 

 

(+ only)

 

 

 

Thickness

All
Glass
Grades

All
GPO
Grades

All
Paper
Grades

C
Canvas
Grade

CE
Canvas
Grade

L
Linen
Grade

LE
Linen
Grade

Fractional
inches

Decimal
inches

1/4"

.250"

±.022"

±.015"

±.012"

+.030"

±.015"

+.024"

±.012"

5/16"

.312"

±.026"

-

±.0145"

+.035"

±.0175"

+.029"

±.0145

3/8"

.375"

±.030"

±.020"

±.017"

+.040"

±.020"

+.034"

±.017"

7/16"

.437"

±.033"

-

±.019"

+.044"

±.022"

+.038"

±.019"

1/2"

.500"

±.036"

±.024"

±.021"

+.048"

±.024"

+.042"

±.021"

5/8"

.625"

±.040"

±.027"

±.024"

+.053"

±.027"

+.053"

±.024"

 

Thickness

All
Glass
Grades

All
GPO
Grades

All
Paper
Grades

C
Canvas
Grade

CE
Canvas
Grade

L
Linen
Grade

LE
Linen
Grade

Fractional
inches

Decimal
inches

3/4"

.750"

±.043"

±.029"

±.027"

+.058"

±.029"

+.054"

±.027"

7/8"

.875"

±.046"

-

±.030"

+.062"

±.031"

+.060"

±.030"

1"

1.000"

±.049"

±.033"

±.033"

+.065"

±.033"

+.065"

±.033"

1 1/4"

1.250"

±.055"

-

±.037"

+.073"

±.037"

+.073"

±.037"

1 1/2"

1.500"

±.061"

-

±.041"

+.081"

±.041"

+.081"

±.041"

1 3/4"

1.750"

±.067"

-

±.045"

+.089"

±.045"

+.089"

±.045"

2"

2.000"

±.073"

-

±.049"

+.097"

±.049"

+.097"

±.049"

Sheet Tolerance Thickness At least 90% of the area of the sheet shall measure within the tolerance given in the above table.

Sheet Tolerance Length and Width The tolerance in length and width of standard sheet sizes shall be plus or minus 1" from standard.

 

Sheet Tolerance Warp and Twist

• In the case of warp, this percentage is stated in terms of the lateral dimensions (length or width); in the case of twist, one corner to the diagonally opposite corner.

• The value for grade G-7 is 1.5 percent
Note 1- These values do not apply to cut pieces but only to sheet sizes manufactured.
Note 2- For method of measuring warp and twist, see ASTM-D-709.

Thickness
range"
from - to

percentage
warp & twist
allowed

36" width
warp (")
allowed

48" length
warp (")
allowed

.031" -.062"

5.0%

1.800"

2.400"

.063" -.125"

2.5%

.900"

1.200

.126" -.250"

1.0%

.360"

.480"

.251" -.750"

0.5%

.180"

.240"

.750" -max

0.25%

.090"

.120"

 

18 Morris Place, Yonkers, NY 10705
P. O. Box 2287, Weirton, WV 26062
33 Tech Park Drive, Falmouth, MA 02536

   

phone 800-431-2274, fax 914-476-0533
phone 800-445-1884, fax 304-723-1625
phone 800-222-8759, fax 508-457-9275 

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