Horizontal Curve Designer

Enter the radius or degree of curve and the intersection angle, and the app lays out the simple circular curve — tangent, length, long chord, external and middle ordinate, the PC and PT stations, plus a deflection-angle table for staking it out.

🆓 Free design tool — lay out as many curves as you like · Balance … EP

① Curve geometry

Define the curve by

Radius R (m)

Degree of curve D (°)

Basis (20-m)

Intersection angle I (= central angle Δ)

degrees

minutes

seconds

Leave minutes/seconds blank for a whole-degree angle (e.g. just 24 in the degrees box).

② Stationing (optional)

P.I. station

Stake interval (m)

Metric stationing: 10+020 means 10 020 m. Give the P.I. station to get the PC/PT stations and a full deflection table.

📐 Curve layout

—

Simple circular curve

Tangent T

—

Length of curve L

—

Long chord LC

—

External E

—

Middle ordinate M

—

Degree of curve D

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Horizontal Curve Designer

① Curve geometry

② Stationing (optional)

📐 Curve layout

Worked solution

Deflection-angle / stake-out table