HomeMy WebLinkAbout330.2CAP
22-1/2' BEND 45° BEND
TEE
90° BEND
THRUST BLOCK BEARING AREA IN SQUARE FEET (SEE NOTES) FOR HORIZONTAL AND DOWNWARD VERTICAL BENDS
SOIL
FIRM SILT COMPACT SAND
FIRM SILTY SAND
COMPACT SAND & GRAVEL
90°45° BEND
11 1/4° 90° 45` BEND 11 1/4°
90°
45° BEND 11 1/4°
FITTING
BEND TEE CAP OR PLUG
& 22 1/2° BEND TEE CAP OR PLUG & 22 1/2°
BEND
TEE CAP OR PLUG & 22 1/2°
BEND BEND
BEND
4"
7.0 4.2 1 4.2
1.7 2.9 2.1 2.1 1.0
2.2
1.6 1.6 1.0
6"
13.3 9.4 9.4
3.8 6.7 4.7 4.7 1.9
5.0
3.5 3.5 1.4
8"
23.3 16.7 16.7
6.7 11.7 8.4 8.4 3.4
8.8
6.3 6.3 2.5
12"
53.0 37.5 37.5
15.0 126.5 18.8 18.8 7.5
20.0
14.0 14.0 5.6
AREAS CALCULATED ON 300 PSI TEST PRESSURE. 3'-0" MIN. COVER FOR WATERMAIN LESS THAN 12".
4'-0" MIN. COVER FOR WATERMAIN 12" OR GREATER.
MAX. HEIGHT OF THRUST BLOCK (FT) = 0.5 x DEPTH OF TRENCH
MIN. HEIGHT OF THRUST BLOCK (FT) = O.D. PIPE + 1.0'
TRUST BLOCK BE,
REA REFERS TO
4CE OF BLOCK M
IN SQUARE FEET
NOTES:
1. LOCATION AND SIZE OF BLOCKING FOR PIPE LARGER THAN 12"DIAMETER AND FOR SOIL TYPES
DIFFERENT THAN SHOWN SHALL BE DETERMINED BY THE ENGINEER.
2. ALL BLOCKING SHALL BE POURED IN PLACE AGAINST UNDISTURBED NATIVE GROUND.
3. ALL POURED THRUST BLOCKS SHALL BE BACKFILLED AFTER MIN. 1 DAY. PRESSURE TESTING
SHALL OCCUR AFTER CONCRETE HAS REACHED NOMINAL COMPRESSIVE STRENGTH.
4. ALL BLOCKING SHALL BE CONCRETE CL 5 (1-1/7').
5. BLOCKING AGAINST FITTINGS SHALL BEAR AGAINST THE GREATEST FITTING SURFACE AREA
POSSIBLE, BUT SHALL NOT COVER OR ENCLOSE BELL ENDS, JOINT BOLTS OR GLANDS
REASONABLE ACCESS TO BOLTS AND GLANDS SHALL BE PROVIDED.
r+(ND
CONCRETE BLOCKING FOR STD. PLAN - 330.2
PUBLIC WORKS
DEPARTMENT HORIZONTAL AND DOWNWARD
Ll
VERTICAL BENDS MARCH 2010