Galvanized stretched  expanded metal mesh

    Expended metal mesh is produced from one single sheet, so nothing can come loose. this is why it is ideal for forming and model making. 
   the production process comes from one sheet and is slit and stretched at the same time. this limits waste to a bare minimum, unlike perforated mesh for example. 
   Expanded metal mesh has a very high strength to weight ration, much higher than standard sheet metal. this means that it is ideal for walkways etc. 

Standard shearing (cutting) tolerances 

Standard and flatten	Tolerances
Random cut	+/- 1/16inch
Bond cut	+/-1/10 inch diamond
Grating or catwalk	+/- 3/32 inch

Stock size and machine run sheets

Type of expanded metal	sheet size	Tolerances
Standard	SWD    LWD	+1/32 inches/- 0 inches per foot of width. + 1/16 inch/-0 inches overall for plain steel + 1/15 inch/-0 inches overall for aluminum or stainless
Flattened	SWD    LWD	+1/32 inches/- 0 inches per foot of width. + 1/16 inch/-0 inches overall for plain steel + 1/15 inch/-0 inches overall for aluminum or stainless
Grating / catwalk	SWD    LWD	+/-1/32 inches/- 0 inches per foot of width. + /-1/16 inch/-0 inches (8-foot sheet) for plain steel + /-1/15 inch/-0 inches (10-foot and 12-foot sheet) for plain steel +/- 1/15 inch/-0 inches overall for aluminum or stainless

 Camber

Type of expanded	Camber tolerance
Standard & Grating  or Catwalk	the greatest deviation of a side edge from a straight line shall not exceed 1/16 inch per foot of dimension (SWD or SWD).
Flattened	after Flattening, the greatest deviation of a side edge from a straight line shall not exceed 2/32 inch per foot of dimension.

Squareness

Type of Expanded	Squareness tolerance
Standard	Edges shall be such that any intersection side shall not be out of square in excess of 1/32 inch per foot either direction, to a maximum of 1/16 inch overall.
Flattened	Edges shall be such that any intersection side shall not be out of square in excess of 1/32 inch per foot either direction, to a maximum of 1/16 inch overall.