EXPANDED METAL • GRATING

Standard (Raised) Expanded Metal is made by slitting a sheet of steel into parallel lines and expanding it to form diamond shape voids between each cut.  The remaining strands that outline the diamond design are set at sharp angles to the plane of the sheet creating a skid-resistant surface.  While the sheet may be expanded up to ten times its original width and lose the majority of its weight. The expanded metal sheet is stronger and more rigid than the original sheet. Sheets are called out by the nominal width of the short way of the diamond followed by the gauge of the sheet (3/4” – #9).

Flattened Expanded Metal is manufactured by passing the standard expanded metal sheet through a cold roll reducing mill that flattens the steel strands creating a flat surface and reducing the thickness and rigidity of the mesh. Both Standard and Flattened Expanded Metal are called out by the nominal width of the short way design of the diamond followed by the Gauge of the sheet (3/4” – #9). As with standard expanded metal, flattened expanded sheets are called out by the nominal width of the short way of the diamond followed by the gauge of the sheet (1/2” – #13).

Expanded Metal Grating is manufactured from low carbon steel plates with a process similar to Standard Expanded Metal but the strands and openings are much larger for use in structural applications like walk-ways and traffic ramps. Expanded grating is called out by the weight per square foot of the finished product.  Bayshore Metals stocks 3#, 4# and 5# expanded grating in 48 x 96” sheet sizes.

For all expanded metal and grating the long dimension of the diamond runs parallel to the length of the sheet.

Nominal Size
Gauge
Flat or Standard
Sheet Size
(W x L)
Diamond Opening
Short Way
Diamond Opening
Long Way
Strand Thickness
Overall Thickness
Weight per Sheet
1/2″
# 13
Standard
48 x 96
0.312
0.938
0.092
0.204
47.04
1/2″
# 13
Flat
48 x 96
0.265
1.000
0.070
0.070
44.80
1/2″
# 13
Flat
48 x 120
0.265
1.000
0.070
0.070
56.00
3/4″
# 9
Standard
48 x 96
0.688
1.562
0.134
0.312
57.60
3/4″
# 9
Flat
48 x 96
0.563
1.688
0.120
0.120
54.72
3/4″
# 9
Flat
48 x 120
0.563
1.688
0.120
0.120
68.40
3/4″
# 13
Standard
48 x 96
0.750
1.688
0.092
0.205
25.60
3/4″
# 13
Flat
48 x 96
0.688
1.781
0.070
0.070
24.00
3/4″
# 13
Flat
48 x 120
0.688
1.781
0.070
0.070
30.00
1-1/2″
# 9
Standard
48 x 96
1.125
2.375
0.134
0.312
38.40
1-1/2″
# 9
Flat
48 x 96
1.000
2.563
0.120
0.120
36.48
1-1/2″
# 9
Flat
48 x 120
1.000
2.563
0.120
0.120
45.60
1-1/2″
# 13
Standard
48 x 96
1.188
2.500
0.092
0.242
19.20
1-1/2″
# 13
Flat
48 x 96
1.062
2.750
0.070
0.070
18.24