Heat Index

[essenwood]

Hi all, in a lot of places stop work order required when the heat index is bigger than 50 deg C.

Well, the apparent 50 deg C temperature depends on the air temperature and humidity obviously.

I was asking myself; why 50?not 45, 55?...anyone got a clue?


Thanks.

 

[dcasto]

We use 120 F. Its just a number based on experience. In fact we use a tiered system. As the temp goes up, we add in manadatory rest and rehydration until at 130 F we send everyone home or stop work.