Michigan Administrative Code
Department - Labor and Economic Opportunity
MIOSHA
General Industry and Construction Safety and Occupational Health Standards
General Industry Safety Standards
Part 7 - GUARDS FOR POWER TRANSMISSION
GUARD DESIGN AND CONSTRUCTION
Section R. 408.10753 - Materials
Current through Vol. 24-16, September 15, 2024
Rule 753.
(1) Wood guards may be used if the presence of fumes or if manufacturing conditions cause rapid deterioration of metal guards, in construction work, and in locations outdoors if extreme cold or extreme heat makes metal guards and railings undesirable.
(2) Material sizes and clearances shall be pursuant to table A. See Figure 2, and Appendices A and B.
(3) Table A reads as follows:
|
TABLE A STANDARD MATERIALS AND DIMENSIONS FOR MACHINERY GUARDS |
|||||
|
Size and Clearance of Filler Materials |
|||||
|
Material |
Clearance From Moving Part At All Points (Inches) |
Largest Mesh or Opening Allowable B (Inches) |
Minimum Gauge (U.S. Standard) Or Thickness |
||
|
Woven Wire |
Under 2 2-4 4-15 |
3/8 1/2 2 |
No. 16-1/8 In. No. 16-1/2 No. 12-2 |
||
|
Expanded Metal |
Under 4 4-15 |
1/2 2 |
No. 18-1/2 In. No. 13-2 |
||
|
Perforated Metal |
Under 4 4-15 |
1/2 2 |
No. 20-1/2 In. No. 14-2 |
||
|
Sheet Metal |
Under 4 4-15 |
- - - |
No. 22 No. 22 |
||
|
Wood Or Metal Strips Crossed |
} |
Under 4 4-15 |
1/2 2 |
} |
3/4 In. Wood Or No. 16 Metal |
|
Wood Or Metal Strips Not Crossed |
} |
Under 4 4-15 |
1/2 The Width One Width |
||
|
Plywood, Plastic Or Equivalent |
Under 4 4-15 |
- - - |
1/4 In. 1/4 In. |
||
|
Standard Railing |
Min. 15 Max. 20 |
- - - |
- - - |
||
