Page 40 - Urban water supply handbook

URBAN WATER INFRASTRUCTURE: A HISTORICAL PERSPECTIVE

TABLE 1.4 Standardized Measures of Roman Pipes According to Frontinus
(Fahlbusch, 1987)

Inner diameter Circumference Area of cross-section
Name of pipe Digiti cm Digiti cm Digiti Quinariae cm 2

5 quinaria 5/4* 2.31 3.93 7.27 1.23 1.00 4.20
6 senaria 6/4* 2.78 4.72 8.72 1.77 1.44 6.05
7 septenaria 7/4* 3.24 5.50 10.18 2.41 1.96 8.22
8 octonaria 8/4* 3.70 6.29 11.63 3.14 2.56 10.75
10 denaria 10/4* 4.63 7.86 14.54 4.71 4.00 16.80
12 duodenaria 12/4* 5.55 9.43 17.44 7.07 5.76 24.19
15 quinum
denum 15/4* 6.94 11.79 21.80 11.04 9.00 37.80
20 vicenaria 20/4* 9.25 15.72 29.07 19.63 16.00 67.20
20 vicenaria 5.05 9.34 15.85 29.32 20* 16.26 68.45
25 vicenum
quinum 5.64 10.44 17.73 32.80 25* 20.37 85.56
30 tricenaria 6.18 11.44 19.42 35.92 30* 24.43 102.62
35 tricenum
quinum 6.67 12.35 20.98 38.81 35* 28.51 119.74
40 quadragenaria 7.14 13.20 22.42 41.47 40* 32.58 136.85
45 quadragenum
quinum 7.57 14.00 23.79 44.00 45* 36.65 153.94
50 quinquagenaria 7.99 14.76 25.07 46.39 50* 40.73 171.05
55 quinquagenum
quinum 8.37 15.48 26.29 48.64 55* 44.80 188.16
60 sexagenaria 8.74 16.17 27.46 50.80 60* 48.87 205.26
65 sexagenum
quinum 9.09 16.82 28.58 52.88 65* 52.94 222.37
70 septuagenaria 9.44 17.46 29.67 54.88 70* 57.02 239.47
75 septuagenum
quinum 9.77 18.08 30.71 56.81 75* 61.09 256.58
80 octogenaria 10.09 18.67 31.71 58.65 80* 65.17 273.70
85 octogenum
quinum 10.40 19.24 32.69 60.47 85* 69.24 290.79
90 nonagenaria 10.70 19.80 33.64 62.23 80* 73.31 307.90
95 nonagenum
quinum 11.00 20.34 34.56 63.93 95* 77.38 325.01
100 centenaria 11.28 20.87 35.46 65.60 100* 81.45 342.10
120 centenum
vicenum 12.36 22.86 38.83 71.84 120* 97.75 410.55
*Source of name.

1.39
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