Semi-Truck Maximum Vertical Slope
Semi-Truck Maximum Vertical Slope
(OP)
Wondering if anyone has ever come across design standards RE Maximum Vertical Slope for semi-trucks as related to parking lot movements. Reviewing a design plan for a proposed shopping center that includes onsite access roads as steep as 18%. Seems like this would pose potential problems for larger delivery vehicles, but not much success finding documentation on the subject.





RE: Semi-Truck Maximum Vertical Slope
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RE: Semi-Truck Maximum Vertical Slope
RE: Semi-Truck Maximum Vertical Slope
From the International Fire Code;
"D103.2 Grade. Fire apparatus access roads shall not exceed 10
percent in grade.
Exception: Grades steeper than 10 percent as approved by
the fire chief."
If the 18% is short (say less than 100%) with gradual transitions at top & bottom it may manageable. There was a recent post with reference to the Green Book, a section on allowable slopes vs. length for trucks.
RE: Semi-Truck Maximum Vertical Slope
RE: Semi-Truck Maximum Vertical Slope
Makes you wonder how the SFFD handles fires on those streets...
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