THRUSTBLOCKCALCULATOR_003

PROJECT ENGINEER:

THRUST BLOCK DIMENSIONS

SOIL TYPE: B

WATER MAIN PRESSURE (P.S.I.): A THRUST BLOCK SPECIFICATIONS AND DIMENSIONS 45° BENDS THRUST AREA THRUST AREA THRUST AREA TEES AND 90° BENDS 22.5° AREA AND "Y"'S FITTING FORCE OF FORCE OF FORCE OF PLUGS (FT) BENDS (FT) (IN^2) (FT) SIZES (LB) THRUST (LB) THRUST (LB) THRUST A B (IN) A (FT) B (FT) A (FT) B (FT) A (FT) B (FT) (FT) (FT) 4 12.6 3.1 1.5 3141.6 4.7 3.7 1.8 4442.9 6.7 2.7 1.3 2404.5 3.6 1.9 1.0 6 28.3 4.6 2.3 7068.6 10.6 5.5 2.7 9996.5 15.0 4.0 2.0 5410.1 8.1 2.9 1.4 8 50.3 6.3 3.0 12566.4 18.8 4.4 CY 17771.5 26.7 5.4 2.7 9617.9 14.4 3.8 1.9 10 78.5 4.9 CY 19635.0 29.5 6.9 CY 27768.0 41.7 7.5 3.0 15027.9 22.5 4.8 2.4 12 113.1 7.1 CY 28274.3 42.4 10.0 CY 39985.9 60.0 5.4 CY 21640.2 32.5 5.8 2.9 14 153.9 9.6 CY 38484.5 57.7 13.6 CY 54425.3 81.6 7.4 CY 29454.8 44.2 7.5 3.0 16 201.1 12.6 CY 50265.5 75.4 17.8 CY 71086.1 106.6 9.6 CY 38471.5 57.7 4.9 CY 18 254.5 15.9 CY 63617.3 95.4 22.5 CY 89968.4 135.0 12.2 CY 48690.5 73.0 6.2 CY 20 314.2 19.6 CY 78539.8 117.8 27.8 CY 111072.1 166.6 15.0 CY 60111.8 90.2 7.7 CY 24 452.4 28.3 CY 113097.3 169.6 40.0 CY 159943.8 239.9 21.6 CY 86561.0 129.8 11.0 CY ASSUMPTIONS: 1. A safety factor of 1.5 has been applied to each thrust dimension to protect against surcharge and spikes in pressure. 2. Beyond trench widths of 8 feet, equivalent volumes of concrete (CY) is specified to overcome the thrust force (lb).

THRUST FORCE (LB) 1225.8 2758.0 4903.2 7661.2 11032.1 15015.9 19612.6 24822.2 30644.7 44128.4

NOTES: 1. THESE DETAILS IN NO WAY LIMITS THE LOCATION OR SIZE OF ADDITIONAL BLOCKING WHEN WARRANTED BY THE CITY ENGINEER. 2. DEPTH FROM GROUND SURFACE TO TOP OF BLOCKING SHALL BE GREATER THAN HEIGHT OF BLOCKING. 3. ALL FITTINGS, VALVES, ETC. SHALL BE WRAPPED WITH VISQUEEN OR POLYWRAP BEFORE CONCRETE IS PLACED, TO PREVENT CORROSION OR BONDING OF THE CONCRETE TO THE BOLTS, FITTINGS, OR PIPE. 4. WIDTH OF THE THRUST BLOCK SHOULD BE AT LEAST TWO TIMES THE HEIGHT OF THE THRUST BLOCK. 5. CUBIC YARDS OF CONCRETE IS SPECIFIED TO OPPOSE THE THRUST FORCE WHEN DIMENSION "A" EXCEEDS 8 FEET 6. ALTHOUGH THE BEARING STRENGTHS USED IN THIS CALCULATOR HAVE BEEN USED SUCCESSFULLY IN THE DESIGN OF THRUST BLOCKS AND ARE CONSIDERED TO BE CONSERVATIVE, THEIR ACCURACY IS TOTALLY DEPENDANT ON ACCURATE SOIL IDENTIFICATION AND

AREA OF THRUST BLOCK

HRUST BLOCKS

1.8 4.1 7.4 11.5 16.5 22.5 29.4 37.2 46.0 66.2