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Electrical Division


Products > Metal


Photos may not be actual size due to printing process.

Peterson Company carries expanded metal in a variety of materials such as aluminum, stainless steel, galvanized, carbon steel, copper, brass and titanium.

  • SWD – Short way of diamond 
  • LWD – Long way of diamond
  • SWO – Short way of opening
  • LWO – Long way of opening

Flat – Expanded metal that is cold-rolled after expansion, to provide a smooth, flat and level sheet. The flattening process will reduce the original thickness by
approximately 10%.
Regular – Standard expanded metal with raised diamonds.
Strand Width – Width of 1 strand.
Strand Thickness – Gauge thickness of strand.
Bond Edge – Part produced with closed diamonds.
Random Sheared Edge – The shearing operation produces an “open” or random edge.
Auxiliary Operations – In-line slitting can be provided holding tolerances as + -.005
inch. Circle shearing, edge flattening and bending are also available.
Squareness – An expanded metal blank will be square to within the largest tolerance of length or width. (Example) Part size 24” (+-1/32) LWD x 24” (+-1/16) SWD will be square t within 1/16”.

upside down metal trash can

Call our sales staff for more information!

CO: (303) 388-6322
UT: (801) 972-3328

expanded metal on truck rear windshield
SWD, LWD Bonded Edge SWD, LWD Random Sheared
.25-18 Regular

1/4″ 18 GA. Regular

.5 16 Reg

1/2″ 16 GA. Regular

.75 9 Reg

3/4″ 9 GA. Regular

1.5 9 Reg

1-1/2″ 9 GA. Regular

Expanded Metal
.25-18 Flat

1/4″ 18 GA. Flat

.5 16 Flat

1/2″ 16 GA. Flat

.75 9 Flat

3/4″ 9 GA. Flat

1.5 9 Flat

1-1/2″ 9 GA. Flat

Stock List

CR Steel spec table
Galvanized spec table
316 Stainless Steel spec table
Stainless Steel spec table
Aluminum spec table
expanded metal on air vent
expanded metal on billboard platform
expanded metal closeup

MATERIAL: Indicate type of material desired (carbon steel, stainless steel, or aluminum).

STYLE NUMBER: Indicate style number (such as 3/4” – #9R) which will indicate the desired diamond size and sheet thickness.

SURFACE: Confirm desired surface, regular or flattened sheet.

QUANTITY & SIZE: Indicate quantity desired and piece sizes including SWD and LWD. Provide material list for cut-to-size pieces and sketches for irregular shapes. For sheared to size orders, review shearing options illustrated above.

FINISHING: Specify any special finish requirements (galvanizing, paint or anodizing).


Expanded Metal Grating is available in the following distinct styles:

Exampled Metal Grating Styles

When considering lightweight, economical catwalk alternatives, consider reverse flow Expanded Metal Catwalk Grating. Manufactured with the LWD spanning the width (short dimension) of the sheet,
Catwalk Grating is commonly stocked in 2’-0, 2’-6, and 4’-0 wide sheets. These products can often be installed on walkways without waste or additional shearing charges.

Expanded Metal Grating
Peterson Company expanded metal grating stock list