First Sub Chord in Surveying Curves Formulas

First Sub Chord is the first chord drawn in the curve for setting out the curve using offsets from tangents. And is denoted by C₁. First Sub Chord is usually measured using the Meter for Length. Note that the value of First Sub Chord is always positive.

Formulas to find First Sub Chord in Surveying Curves

fxLength of First Chord for given Deflection Angle of First ChordGo

Surveying Curves formulas that make use of First Sub Chord

fxDeflection Angle of First ChordGo

fxFirst Offset given First Chord LengthGo

fxSecond Offset using Chord LengthsGo

List of variables in Surveying Curves formulas

fx Deflection Angle 1 Go

fx Radius of Curve for Mid Ordinate Go

FAQ

What is the First Sub Chord?

First Sub Chord is the first chord drawn in the curve for setting out the curve using offsets from tangents. First Sub Chord is usually measured using the Meter for Length. Note that the value of First Sub Chord is always positive.

Can the First Sub Chord be negative?

No, the First Sub Chord, measured in Length cannot be negative.

What unit is used to measure First Sub Chord?

First Sub Chord is usually measured using the Meter[m] for Length. Millimeter[m], Kilometer[m], Decimeter[m] are the few other units in which First Sub Chord can be measured.

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