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Tangent length = R tan θ/2<br />
= 250 tan 60°/2 = 144.34m<br />
Chainage T 1<br />
Arc length<br />
PROCEDU<br />
RE<br />
= chainage I – tangent length<br />
= 2942 - 144.34 = 2797.66m<br />
= 2π x R x θ<br />
360<br />
= 2π x 250 x 60 o = 261.8m<br />
360<br />
Chainage T 2<br />
= chainage T 1<br />
+ arc length<br />
= 2797.66 + 261.8 = 3059.46m<br />
Ofset,Y R R 2 Y 2 R 2 -Y 2 √(R 2 -Y 2) X= R-√(R 2 -<br />
X<br />
=<br />
R<br />
−<br />
R<br />
2<br />
− Y<br />
Y 2) 2<br />
0 250 62500 0 62500 250.000 0.000<br />
20 250 62500 400 62100 249.199 0.801<br />
40 250 62500 1600 60900 246.779 3.221<br />
60 250 62500 3600 58900 242.693 7.307<br />
80 250 62500 6400 56100 236.854 13.146<br />
100 250 62500 10000 52500 229.129 20.871<br />
120 250 62500 14400 48100 219.317 30.683<br />
140 250 62500 19600 42900 207.123 42.877<br />
144.338 250 62500 20833.333 41666.667 204.124 45.876
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