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Handbook: 188 of 287
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TABLE OF ZENITH-TANGENTS
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Height of Opposite Building Above Bottom of Prism Plate, Feet.
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| * |
40 |
45 |
50 |
55 |
60 |
65 |
70 |
80 |
90 |
100 |
125 |
150 |
175 |
200 |
| 3 |
.07 |
.06 |
.06 |
.05 |
.05 |
.05 |
.04 |
.04 |
.03 |
.03 |
.02 |
.02 |
.02 |
.01 |
| 4 |
.10 |
.09 |
.08 |
.07 |
.07 |
.06 |
.06 |
.05 |
.04 |
.04 |
.03 |
.03 |
.02 |
.02 |
| 5 |
.12 |
.11 |
.10 |
.09 |
.08 |
.08 |
.07 |
.06 |
.06 |
.05 |
.04 |
.03 |
.03 |
.02 |
| 6 |
.15 |
.13 |
.12 |
.11 |
.10 |
.09 |
.09 |
.07 |
.07 |
.06 |
.05 |
.04 |
.03 |
.03 |
| 8 |
.20 |
.18 |
.16 |
.15 |
.13 |
.12 |
.11 |
.10 |
.09 |
.08 |
.06 |
.05 |
.05 |
.04 |
| 10 |
.25 |
.22 |
.20 |
.18 |
.17 |
.15 |
.14 |
.13 |
.11 |
.10 |
.08 |
.07 |
.06 |
.05 |
| 12 |
.30 |
.27 |
.24 |
.22 |
.20 |
.18 |
.17 |
.15 |
.13 |
.12 |
.10 |
.08 |
.07 |
.06 |
| 15 |
.37 |
.33 |
.30 |
.27 |
.25 |
.23 |
.21 |
.19 |
.17 |
.15 |
.12 |
.10 |
.09 |
.07 |
| 17 |
.43 |
.38 |
.34 |
.31 |
.28 |
.26 |
.24 |
.22 |
.19 |
.17 |
.14 |
.11 |
.10 |
.08 |
| 20 |
.50 |
.45 |
.40 |
.36 |
.33 |
.31 |
.29 |
.25 |
.22 |
.20 |
.16 |
.13 |
.11 |
.10 |
| 25 |
.62 |
.56 |
.50 |
.45 |
.42 |
.38 |
.36 |
.31 |
.28 |
.25 |
.20 |
.17 |
.14 |
.12 |
| 30 |
.75 |
.67 |
.60 |
.54 |
.50 |
.46 |
.43 |
.38 |
.33 |
.30 |
.24 |
.20 |
.17 |
.15 |
| 35 |
.88 |
.78 |
.70 |
.64 |
.58 |
.54 |
.50 |
.44 |
.39 |
.35 |
.28 |
.23 |
.20 |
.17 |
| 40 |
1.00 |
.89 |
.80 |
.73 |
.67 |
.62 |
.57 |
.50 |
.45 |
.40 |
.32 |
.27 |
.23 |
.20 |
| 45 |
1.12 |
1.00 |
.90 |
.82 |
.75 |
.69 |
.64 |
.56 |
.50 |
.45 |
.36 |
.30 |
.27 |
.22 |
| 50 |
1.25 |
1.11 |
1.00 |
.91 |
.83 |
.77 |
.71 |
.63 |
.56 |
.50 |
.40 |
.33 |
.29 |
.25 |
| 55 |
1.37 |
1.22 |
1.10 |
1.00 |
.92 |
.85 |
.79 |
.69 |
.61 |
.55 |
.44 |
.37 |
.31 |
.27 |
| 60 |
1.50 |
1.33 |
1.20 |
1.09 |
1.00 |
.92 |
.86 |
.75 |
.67 |
.60 |
.48 |
.40 |
.34 |
.30 |
| 65 |
1.62 |
1.45 |
1.30 |
1.18 |
1.08 |
1.00 |
.92 |
.81 |
.72 |
.65 |
.52 |
.43 |
.37 |
.32 |
| 70 |
1.75 |
1.56 |
1.40 |
1.27 |
1.17 |
1.08 |
1.00 |
.88 |
.78 |
.70 |
.56 |
.47 |
.40 |
.35 |
| 80 |
2.00 |
1.78 |
1.60 |
1.45 |
1.33 |
1.23 |
1.14 |
1.00 |
.89 |
.80 |
.64 |
.53 |
.46 |
.40 |
| 90 |
2.25 |
2.00 |
1.80 |
1.64 |
1.50 |
1.38 |
1.29 |
1.13 |
1.00 |
.90 |
.72 |
.60 |
.51 |
.45 |
| 100 |
2.50 |
2.22 |
2.00 |
1.82 |
1.67 |
1.54 |
1.43 |
1.25 |
1.11 |
1.00 |
.80 |
.67 |
.57 |
.50 |
| 125 |
3.12 |
2.78 |
2.50 |
2.27 |
2.08 |
1.92 |
1.79 |
1.56 |
1.39 |
1.25 |
1.00 |
.83 |
.71 |
.62 |
| 150 |
3.75 |
3.33 |
3.00 |
2.73 |
2.50 |
2.31 |
2.14 |
1.88 |
1.67 |
1.50 |
1.20 |
1.00 |
.86 |
.75 |
| 175 |
4.37 |
3.89 |
3.50 |
3.18 |
2.92 |
2.69 |
2.50 |
2.19 |
1.95 |
1.75 |
1.40 |
1.33 |
1.00 |
.87 |
| 200 |
5.00 |
4.45 |
4.00 |
3.64 |
3.33 |
3.08 |
2.86 |
2.50 |
2.22 |
2.00 |
1.60 |
1.50 |
1.33 |
1.00 |
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* Distance from Prism Plate to Face of
Opposite Building, Feet.
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