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Transcription
Table III.—Radii, Ordinates and Deflections
Deg. Radius Mid. Ord. Tan Offset Def. for 1 Foot Deg. Radius Mid. Ord. Tan Offset Def. for 1 Foot
0° 10' 34377.5 .036 .145 0.05' 7° 819.02 1.528 6.105 2.10'
20 17188.8 .073 .291 0.10 20 781.84 1.600 6.395 2.20
30 11459.2 .109 .436 0.15 30 764.49 1.637 6.540 2.25
40 8594.42 .145 .582 0.20 40 747.89 1.673 6.685 2.30
50 6875.55 .182 .727 0.25
1 5729.65 .218 .873 0.30 8 716.78 1.746 6.976 2.40
10 4911.15 .255 1.018 0.35 20 688.16 1.819 7.266 2.50
20 4297.28 .291 1.164 0.40 30 674.69 1.855 7.411 2.55
30 3819.83 .327 1.309 0.45 40 661.74 1.892 7.556 2.60
40 3437.87 .364 1.454 0.50
50 3125.36 .400 1.600 0.55
9 637.28 1.965 7.846 2.70
20 614.56 2.037 8.136 2.80
30 603.80 2.074 8.281 2.85
40 593.42 2.110 8.426 2.90
10 573.69 2.183 8.716 3.00
11 546.44 2.292 9.150 3.15
30 521.67 2.402 9.585 3.30
30 499.06 2.511 10.02 3.45
12 478.34 2.620 10.45 3.60
30 459.28 2.730 10.89 3.75
13 441.68 2.839 11.32 3.90
30 425.40 2.949 11.75 4.05
14 410.28 3.058 12.18 4.20
30 396.20 3.168 12.62 4.35
15 383.07 3.277 13.05 4.50
30 370.78 3.387 13.49 4.65
16 359.27 3.496 13.92 4.80
30 348.45 3.606 14.35 4.95
17 338.27 3.716 14.78 5.10
18 319.62 3.935 15.64 5.40
19 302.94 4.155 16.51 5.70
20 287.94 4.374 17.37 6.00
21 274.37 4.594 18.22 6.30
22 262.04 4.814 19.08 6.60
23 250.79 5.035 19.94 6.90
24 240.49 5.255 20.79 7.20
25 231.01 5.476 21.64 7.50
26 222.27 5.697 22.50 7.80
27 214.18 5.918 23.35 8.10
28 206.68 6.139 24.19 8.40
29 199.70 6.360 25.04 8.70
30 193.18 6.583 25.88 9.00
NOTE. Chord Deflection=2 times tangent deflection.
Table IV.—Deflections for Sub Chords
for Short Radius Curves
Degree of Curve Radius Deflection Angles for Sub Chords of Various Lengths Length of Arc for 100 Ft. Chord
12.5 Ft. 15 Ft. 20 Ft. 25 Ft.
30° 193.18 1° 51' 2° 17' 2° 58' 3° 43' 101.15
32° 181.39 1° 59' 2° 25' 3° 10' 3° 58' 101.33
34° 171.01 2° 06' 2° 33' 3° 21' 4° 12' 101.48
36° 161.80 2° 13' 2° 41' 3° 33' 4° 26' 101.66
38° 153.58 2° 20' 2° 49' 3° 44' 4° 40' 101.85
40° 146.19 2° 27' 2° 57' 3° 55' 4° 54' 102.06
42° 139.52 2° 34' 3° 05' 4° 07' 5° 08' 102.29
44° 133.47 2° 41' 3° 13' 4° 18' 5° 22' 102.53
46° 127.97 2° 48' 3° 21' 4° 29' 5° 36' 102.76
48° 122.92 2° 55' 3° 29' 4° 40' 5° 50' 103.00
50° 118.31 3° 02' 3° 38' 4° 51' 6° 04' 103.24
52° 114.06 3° 09' 3° 46' 5° 02' 6° 17' 103.54
54° 110.11 3° 16' 3° 54' 5° 13' 6° 31' 103.84
56° 106.50 3° 22' 4° 02' 5° 23' 6° 44' 104.14
58° 103.14 3° 29' 4° 10' 5° 34' 6° 57' 104.43
60° 100.00 3° 35' 4° 18' 5° 44' 7° 11' 104.72
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