6-14THRUST 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,x00
6" 8,000 4,400 2,300 1,200 5,700
8" 14,300 7,700 4,000 2,000 1 Q,100
10" 22,300 12,100 6,200 3,100 i 5,800
12" 32,000 17,400 8,900 4,500 22,700
14" 43,600 23,600 12,100 6,100 30,800
16" 57,000 30,800 15,700 7,900 40,300
NOTES;
1. BLOCKING SHALL BE GEMENT GONGRETE 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 LOADS
FOR HORIZONTAL THRUSTS WHEN 7HE DEPTH
OF COYER OVER THE PIPE EXCEEDS 2 FEET
Soil POUNDS PER CITY OF YELM
WASHINGTON
,
SQUARE Fool DEPT. OF PUBLIC WORKS
MUCK, PEAT 0
SOFT CLAY 1,000 THRUST LOADS
SAND ~ 2,000
SAND & GRAVEL 3,000
APPROVED DWG. NO.
SAND & GRAVEL 4,000 ~~,_____.._
CEMENTED WITH
~-
PUBLIC WORKS DIRECTOR DATE
CLAY
HARD SHALE 10,000 DES. DWN. CKD. !DATE
ES JEG JEG j 62005