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Brown-Campbell Company
Brown-Campbell Company
800-472-8464
Specialty Steel Manufacturer,
Fabricator & Distributor Since 1952

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

Expanded Metal Tolerances

Standard Tolerances for Stock Size
& Machine Run Sheets

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.

Expanded Metal Tolerances