Surfaces and edges of workstation components that the user is expected to touch with bare skin should not exceed the exposure times and temperatures for the surface materials listed in Table 11.2. 100
Table 11.2 Maximum Surface Temperature In Degrees Fahrenheit (Celsius) As A Function Of Material And Contact Time
Material |
Contact Time |
||||
1 sec |
4 sec |
10 sec |
10 min |
8 hours1 |
|
Unpainted metal |
149 (65) |
136 (58) |
131 (55) |
118 (48) |
109 (43) |
Lacquered metal |
167 (75) |
142 (61) |
131 (55) |
118 (48) |
109 (43) |
Enameled metal |
158 (70) |
140 (60) |
133 (56) |
118 (48) |
109 (43) |
Ceramic, glass, stone |
176 (80) |
158 (70) |
151 (66) |
118 (48) |
109 (43) |
Plastics |
185 (85) |
165 (74) |
158 (70) |
118 (48) |
109 (43) |
Wood |
230(110) |
199 (93) |
192 (89) |
118 (48) |
109 (43) |
1 Amount of contact area (more than 10 percent of skin surface area) or contact with vulnerable structures (such as airways) invalidate the 8-hour values given here.
Note: Source is Table 5-1 in ANSI/HFES 100 (ANSI/HFES, 2007)