Length of Curve using Rate of change of Grade in Parabolic Curves Formula

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The Length of Parabolic Curves is referred as horizontal distance between specific points on the curve. Check FAQs
LPc=G2-(-GI)Rg
LPc - Length of Parabolic Curves?G2 - Grade at End of Curve?GI - Grade at Beginning of Curve?Rg - Rate of Change of Grade?

Length of Curve using Rate of change of Grade in Parabolic Curves Example

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Here is how the Length of Curve using Rate of change of Grade in Parabolic Curves equation looks like with Values.

Here is how the Length of Curve using Rate of change of Grade in Parabolic Curves equation looks like with Units.

Here is how the Length of Curve using Rate of change of Grade in Parabolic Curves equation looks like.

0.3564Edit=8Edit-(-10Edit)50.5Edit
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Length of Curve using Rate of change of Grade in Parabolic Curves Solution

Follow our step by step solution on how to calculate Length of Curve using Rate of change of Grade in Parabolic Curves?

FIRST Step Consider the formula
LPc=G2-(-GI)Rg
Next Step Substitute values of Variables
LPc=8-(-10)50.5m⁻¹
Next Step Prepare to Evaluate
LPc=8-(-10)50.5
Next Step Evaluate
LPc=0.356435643564356m
LAST Step Rounding Answer
LPc=0.3564m

Length of Curve using Rate of change of Grade in Parabolic Curves Formula Elements

Variables
Length of Parabolic Curves
The Length of Parabolic Curves is referred as horizontal distance between specific points on the curve.
Symbol: LPc
Measurement: LengthUnit: m
Note: Value can be positive or negative.
Grade at End of Curve
The Grade at End of Curve referred as the grade at one end of the parabolic curve.
Symbol: G2
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Grade at Beginning of Curve
The Grade at Beginning of Curve referred as the grade at the beginning of the parabolic curve.
Symbol: GI
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Rate of Change of Grade
The Rate of Change of Grade is referred as how quickly the grade (slope) of a roadway change over a specific distance.
Symbol: Rg
Measurement: Linear Atomic DensityUnit: m⁻¹
Note: Value should be greater than 0.

Other formulas in Parabolic Curves category

​Go Elevation of Point of Vertical Curvature
E0=V-((12)(LcGI))
​Go Elevation of Point of Vertical Intersection
V=E0+(12)(LcGI)
​Go Distance from Point of Vertical Curve to Lowest Point on Sag Curve
Xs=-(GIRg)
​Go Rate of Change of Grade given Distance from PVC to Lowest Point on Sag Curve
Rg=-(GIXs)

How to Evaluate Length of Curve using Rate of change of Grade in Parabolic Curves?

Length of Curve using Rate of change of Grade in Parabolic Curves evaluator uses Length of Parabolic Curves = (Grade at End of Curve-(-Grade at Beginning of Curve))/Rate of Change of Grade to evaluate the Length of Parabolic Curves, The Length of Curve using Rate of change of Grade in Parabolic Curves formula is defined as the length of arc obtained in a parabolic curve in roads. Length of Parabolic Curves is denoted by LPc symbol.

How to evaluate Length of Curve using Rate of change of Grade in Parabolic Curves using this online evaluator? To use this online evaluator for Length of Curve using Rate of change of Grade in Parabolic Curves, enter Grade at End of Curve (G2), Grade at Beginning of Curve (GI) & Rate of Change of Grade (Rg) and hit the calculate button.

FAQs on Length of Curve using Rate of change of Grade in Parabolic Curves

What is the formula to find Length of Curve using Rate of change of Grade in Parabolic Curves?
The formula of Length of Curve using Rate of change of Grade in Parabolic Curves is expressed as Length of Parabolic Curves = (Grade at End of Curve-(-Grade at Beginning of Curve))/Rate of Change of Grade. Here is an example- 0.356436 = (8-(-10))/50.5.
How to calculate Length of Curve using Rate of change of Grade in Parabolic Curves?
With Grade at End of Curve (G2), Grade at Beginning of Curve (GI) & Rate of Change of Grade (Rg) we can find Length of Curve using Rate of change of Grade in Parabolic Curves using the formula - Length of Parabolic Curves = (Grade at End of Curve-(-Grade at Beginning of Curve))/Rate of Change of Grade.
Can the Length of Curve using Rate of change of Grade in Parabolic Curves be negative?
Yes, the Length of Curve using Rate of change of Grade in Parabolic Curves, measured in Length can be negative.
Which unit is used to measure Length of Curve using Rate of change of Grade in Parabolic Curves?
Length of Curve using Rate of change of Grade in Parabolic Curves is usually measured using the Meter[m] for Length. Millimeter[m], Kilometer[m], Decimeter[m] are the few other units in which Length of Curve using Rate of change of Grade in Parabolic Curves can be measured.
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