HomeMy WebLinkAbout330.1NOTES:
1.MINIMUM BEARING AREA MUST BE ADJUSTED FOR PIPE SIZE, PRESSURE, AND SOIL CONDITIONS.
2.FITTINGS SHALL BE POLYWRAPPED PRIOR TO POURING CONCRETE BLOCKING.
3.CONCRETE BLOCKING SHALL BE CAST IN PLACE AND SHALL HAVE A MINIMUM OF 0.25 SF BEARING AREA AGAINST THE FITTING.
4.CONCRETE BLOCKING SHALL BEAR AGAINST FITTINGS ONLY AND SHALL BE CLEAR OF JOINTS TO PERMIT TAKING UP OR DISMANTLING
JOINT.
5.CONTRACTOR SHALL INSTALL BLOCKING ADEQUATE TO WITHSTAND FULL HYDROSTATIC TEST PRESSURE AS WELL AS TO CONTINUOUSLY
WITHSTAND OPERATING PRESSURE UNDER ALL CONDITIONS OF SERVICE.
6.ALL CONCRETE SHALL BE MECHANICALLY MIXED. JOB SITE MIXING, HAND-MIXED CONCRETE, AND MOBILE CONCRETE MIXERS ARE NOT
ALLOWED.
7.IN MUCK OR PEAT, ALL THRUSTS SHALL BE RESTRAINED BY PILES OR TIE RODS TO SOLID FOUNDATION OR MUCK OR PEAT SHALL BE
REMOVED AND REPLACED WITH BALLAST OF SUFFICIENT STABILITY TO RESIST THRUST.
8.CONCRETE BLOCKING SHALL BE LEFT OPEN OR SHEETED FOR MINIMUM 24 HOURS.
MINIMUM BEARING AREA
AGAINST UNDISTURBED SOIL (SF) *
PIPE
SIZE
PRESSURE
(PSI)
4"200
300
2/(1)
3/(2)
1/(NONE )
2/(2)
1/(NONE )
2/(1)
NONE
1/(1)
NONE
NONE
6"200
300
4/(3)
6/(4)
3/(2)
4/(3)
3/(1)
3/(2)
1/(1)
2/(1)
1/(NONE )
1/(NONE )
8"200
300
7/(5)
11/(8)
5/(3)
8/(5)
4/(3)
6/(4)
2/(2)
3/(2)
1/(1)
2/(1)
10"200
275
11/(8)
16/(11)
8/(6)
11/(7)
6/(4)
9/(6)
3/(2)
5/(3)
2/(1)
3/(2)
12"200
250
16/(11)
24/(16)
11/(8)
17/(11)
9/(6)
13/(9)
5/(3)
7/(5)
3/(2)
4/(3)
14"200
250
22/(13)
33/(22)
16/(11)
23/(16)
12/(8)
18/(12)
6/(4)
9/(6)
3/(2)
5/(3)
16"200
225
29/(19)
32/(21)
21/(14)
23/(16)
16/(11)
17/(12)
8/(6)
9/(6)
5/(3)
5/(3)
18"200 36/(24)26/(17)20/(13)10/(7)5/(4)
20"200 45/(29)32/(21)24/(16)13/(8)7/(4)
24"200 64/(43)46/(30)35/(23)18/(12)9/(6)
* VALUES BASED ON SAFE BEARING LOAD OF 2,000/(3,000) PSF
SOIL TYPE SAFE BEARING LOAD (PSF)
MUCK OR PEAT 0
SOFT CLAY 1,000
SAND 2,000
SAND AND GRAVEL 3,000
CEMENTED WITH CLAY 4,000
HARD SHALE 10,000
E
B
D
A C
B
A B C D E
11 1 4° BEND
22 1 2° BEND
45° BEND90° BEND
CAP / PLUG
TEE
PUBLIC WORKS
DEPARTMENT
APPROVED:
DATEMartin Pastucha
Public Works Administrator
CONCRETE BLOCKING
FOR HORIZONTAL FITTINGS
STD. PLAN - 330.1
6/28/2023