My first port of call would be to check what the CEMA belt conveyor manual says.

The answer would also depend on if the conveying belt is smooth or chevron. ■

I have been in the salt business for over 30 years and I can tell you that 18 degrees is the maximum that you would want to incline a non chevron conveyor transporting salt. I personally do not like to see them over 15 degrees. ■