DGWaterDetail6-14THRUST LOADS
THRUST AT FITTINGS IN POUNDS AT 200 POUNDS PER SQUARE INCH OF WATER PRESSURE
PIPE 90' BEND 45' BEND 22-1/2' BEND 11-1/4' BEND DEAD END
DIAMETER OR TEE
4" 3,600 2,000 1,000 500 2,600
6" 8,000 4,400 2,300 1,200 5,700
8" 14,300 7,700 4,000 2,000 10,100
10" 22,300 12,100 6,200 3,100 15,800
12° 32,000 17,400 6,900 4,500 22,700
14" 43,600 23,600 12,700 6,100 30,800
16" 57,000 30,800 15,700 7,900 40,300
NOTES:
1. BLOCKING SHALL BE CEMENT CONCRETE CLASS 3000 POURED IN PLACE
AGAINST UNDISTURBED EARTH. FITTING SHALL BE ISOLATED FROM CONCRETE
THRUST BLOCK WITH PLASTIC OR SIMILAR MATERIAL.
2. TO DETERMINE THE BEARING AREA OF THE THRUST BLOCK IN SQUARE
FEET (S. F.):
EXAMPLE 12" - 90' BEND IN SAND AND GRAVEL
32,000 LBS 3000 LB/S.F. = 10.7 S.F. OF AREA
3. AREAS MUST BE ADJUSTED FOR OTHER PIPE SIZE, PRESSURES AND
SOIL CONDITIONS.
4. BLOCKING SHALL BE ADEQUATE TO WITHSTAND FULL TEST PRESSURE
AS WELL AS TO CONTINUOUSLY WITHSTAND OPERATING PRESSURE UNDER
ALL CONDITIONS OF SERVICE.
SAFE SOIL BEARING LOAD S
FOR HORIZONTAL THRUSTS WHEN THE DEPTH
OF COVER OVER THE PIPE EXCEEDS 2 FEET
POUNDS PER
SAIL
SQUARE FOOT CITY OF YELM, WASHINGTON
DEPT. OF PUBLIC WORKS
MUCK, PEAT p
SOFT CLAY 1,00o T H R U S T LOAD S
SAND 2,000
SAND & GRAVEL 3,D00
SAND & GRAVEL 4,000 AP DWG. NO.
~
~
CEMENTED WITH ~
'^
PUBLI
6-1 4
W
CLAY C
ORKS DIRECTOR pATE
HARD SHALE 10,000 DES. DWN. CKD. DATE
ES JEG TP 4/20Q7