Introduction to Expanded Metal
Tolerances
FLATTENING
Limited to 72” maximum one dimension. Flattened sheet thickness will be +/- 10% of published thickness.
CAMBER
Bow in Sheet. Measured by placing a straight edge along the concave side of the sheet parallel to LWD, touching both ends of the sheet. The maximum distance between the edge of the expanded metal and the straight edge is the camber.
Camber Tolerances:
Standard Expanded Metal: 1/16” per foot of length
Flattened Expanded Metal: 3/32” per foot of length
Standard Tolerances for Stock Size |
|||
| Type | Material | SWD per foot of width |
LWD Overall |
|---|---|---|---|
| Flattened | Carbon & Aluminum | +3/8" - 0" | +3/4" - 0" |
| Stainless Steel | +1/2" - 0" | ||
| Standard | Carbon & Aluminum | +3/8" - 0" | +1/2" - 0" |
| Stainless Steel | +1/2" - 0" | ||
| Grating/Catwalk | Carbon & Aluminum | +3/8" - 0" | +1/2" - 0" |
| Stainless Steel | +1/2" - 0" | ||
OUT OF SQUARE
Expanded Metal sheets are not perfectly square as manufactured. Measured using 90 degree angle.
Out of Square Tolerances:
SWD: 1/16” per foot of width
LWD: 1/16” per foot of length
Note: Sheet must be re-squared
by shearing on all sides for
squareness, if required.
MANUFACTURED TO SIZE
Closed diamonds on all sides. Size tolerances same as stock size sheets. Unless otherwise specified, material will be produced to plus side of tolerance.
