Page 270 - Buried Pipe Design
P. 270
Design of Pressure Pipes 241
Figure 4.29 Types of thrust blocking. (Reprinted, by permission, from Handbook of PVC
Pipe, 21 Uni-Bell PVC Pipe Association.)
2
TABLE 4.13 Thrust Developed per 100 lb/in Pressure
Fitting 90° Fitting 45° Valve tees
Pipe size, in elbow, lbf elbow, lbf dead ends, lbf
4 2,560 1,390 1,810
6 5,290 2,860 3,740
8 9,100 4,920 6,430
10 13,680 7,410 9,680
12 19,350 10,470 13,690
14 26,010 14,090 18,390
16 33,640 18,230 23,780
18 42,250 22,890 29,860
20 51,840 28,090 36,640
24 73,950 40,070 52,280
30 113,770 61,640 80,420
36 162,970 88,310 115,210
