Permissible Rate in Surveying Formulas

Permissible Rate is the maximum allowable rate of change in grade for vertical curves. For railway work 0.1% rate of change of grade is permitted at summits and 0.05% per chain at sags. And is denoted by P_N.

Formulas to find Permissible Rate in Surveying Formulas

fxPermissible Grade given LengthGo

Surveying Formulas formulas that make use of Permissible Rate

fxLength of Vertical CurveGo

fxChange of Grade given LengthGo

List of variables in Surveying Formulas formulas

fx Change in Grade Go

fx Length of Vertical Curve Go

FAQ

What is the Permissible Rate?

Permissible Rate is the maximum allowable rate of change in grade for vertical curves. For railway work 0.1% rate of change of grade is permitted at summits and 0.05% per chain at sags.

Can the Permissible Rate be negative?

{YesorNo}, the Permissible Rate, measured in {OutputVariableMeasurementName} {CanorCannot} be negative.

Let Others Know

✖

Facebook

Twitter

Copied!