max roadway grade
max roadway grade
(OP)
I have a 7000' private access road to a energy facility. It will be used by tractor trailers hauling fairly heavy loads. 25-50 trucks per day. Would a 12% grade for a 1000' stretch of this road be good design? The rest of the road will be at about 8% and less.





RE: max roadway grade
RE: max roadway grade
RE: max roadway grade
RE: max roadway grade
RE: max roadway grade
RE: max roadway grade
RE: max roadway grade
I agree with MikeTheEngineer...provide a "safety valve"...use gravel as a shoulder material to allow stopping in the event of an issue.
In my opinion, 12 percent is too much for a typical condition. I make that statement as an engineer and a former tractor-trailer driver!
RE: max roadway grade
RE: max roadway grade
RE: max roadway grade
When dealing with steep grades, it's easy to inadvertently create a situation where the breakover is sufficient to cause the landing gear on a trailer to catch on the pavement as the tractor crests the rise.
If the landing gear hits the pavement hard enough it can stop the trailer dead in its tracks and pop the trailer's kingpin up and out of the tractor's fifth wheel.
RE: max roadway grade
RE: max roadway grade
Dik