Wrought iron was taken to be 480 pounds avoirdupois.
The minimum u s standard gage for sheet metal guards is.
In all other industries wood guards are not allowed per 29 cfr 1910 219 o 2.
Ferrous metals nonferrous metals gauge no.
Mm galvanized sheet in.
Gage is recognized commercial standard for uncoated sheet metal plate iron and steel.
Mm brown sharpe in.
This series was not based on thickness but mass.
Steel stainless steel aluminum brass etc.
Mm 7 0 0000000 0 50000 12 70000 0 65135 16 54439 6 0 000000 0 46875 11 90625 0 58005 14 73324.
Standard gauge for sheet iron and steel for the purpose of levying taxes and duties.
An act of congress march 3 1893 established the u s.
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For the purpose of securing uniformity the following is established as the only standard gauge for sheet and plate iron and steel in the united states of america namely.
Osha machine guarding e tool rev 3 31 17.
Gauge or gage sizes are numbers that indicate the thickness of a piece of sheet metal with a higher number referring to a thinner sheet.
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Polished and stainless steel.
0 36 on one face with decimal equivalent on the back face.
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Wood guards also may be used in construction work and in outdoor locations where extreme cold make metal guards undesirable.
The equivalent thicknesses differ for each gauge size standard which were developed based on the weight of the sheet for a given material.
Standard gauge for sheet and plate iron and steel.
Standard sheet metal gauges gauge steel 4 galvanized steel stainless steel aluminium electrical steel in mm in mm in mm in mm in mm 3 0 2391 6 07 4 0 2242 5 69 5 0 2092 5 31 6 0 1943 4 94 0 162 4 1 7 0 1793 4 55 0 1875 4 76 0 1443 3 67 8 0 1644 4 18 0 1681 4 27 0 1719 4 37 0 1285 3 26.
For other materials such as aluminum and brass the thicknesses will be different.
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The following sheet metal gauge size reference chart gives the weight and thickness of sheet metal given as a gauge sometimes spelled gage and indicates the standard thickness of sheet metal and wire for most materials as the gauge number increases the material thickness.
Standard sheet metal gage.