While visiting with my daughter (who is in the Military) over fathers day the subject of hard hats came up, forget why.. but she said in her unit you can earn a
Hard Hat Exemption and go without if you like. I said how do you earn one of those? and she handed me this list:
Hard Hat Exemption Procedure- IMMERSION TEST-
Your head must be immersed in water for 24 hours & absorb no more than 0.5% of your head's weight.
- IMPACT TEST-
While laying horizontal with your head resting on a 0.75" steel plate, an 8 pound steel ball will be dropped on your head several times from a height of 50'. To pass, there can be no damage to your head.
- CHEMICAL RESISTANCE TEST-
A variety of acids, solvents, oils & industrial gasses will be rubbed all over your head. There can be no deformities or obvious color change from the test.
- FIRE RESISTANCE TEST-
For this test, we will torch your head for 5 minutes with a propane torch. if it is only slow burning, you may earn a class G or E rating. If there are any holes in your head, you fail the test.
- ELECTRICAL TEST-
For this final test, your head must sustain 2200 volts AC, 50 HZ, for 3 minutes, with leakage currents not exceeding 9 milliamperes. breakdown threshold has been established at 300,000 volts.
Hard Hats - Yes / No?
Linear Mode
