HomeMy WebLinkAboutS-3415070
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5 "MIN
24° MIN.
2 7" LD.
54" MH
54"
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5.5" MIN.
24° MIN.
24" I.D.
fi0" MH
w
o
6° MIN.
42" MIN.
COVER TO READ "SEWER" -
w
6"
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12,000 6,510
IN RAISED LETTERS
1,700
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15,100
NOTES:
5,880
3,020
10"
275
21,620
30,570 16,540
PER CITY OF RENTON TRENCH
o
w
250
m
1. IN UNIMPROVED AREAS POUR
1' -0" THICK 2' -D" SQUARE
RESTORATION AND STREET OVERLAY
14"
d
4
CONCRETE, CLASS 3000, PAD
AROUND RING AND COVER.
Y
z
RED'S
225
45,250
64,000 34,620
17,650
m
o
'S
50,900
2. IN ASPHALT ROADWAYS RESTORE
AROUND CLEANOUT RING
10,180
20"
200
62,840
AND COVER AS REQUIRED BY
STANDARD DETAIL DRAWING BR36.
12,560
J
200
90,480
127,980 69,200
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SURFACE RESTORATION-
AS SPECIFIED
MOUND 4" MIN
"GRAVEL BORROW" PER -
WSDOT STD SPEC 9 -03.14
COMPACT TO 90% OF MAX
DENSITY
BENCH AS NEEDED FOR
SHORING OR TRENCH BOX
(TYP) WHEN DEPTH IS 4'
AND GREATER
"BEDDING MATERIAL
3/4" SQUARES SPACED - 3/4"
AS INDICATED - HT. 1/8
/� ❑ � _� 1/2"
❑ ❑❑ ❑❑ �-
r ❑
RAISE -1/2"
WIDE BORDER
1'•
/ SAWCUT (TYR) APPLY
JOINT SEALANT AR4000W
12° TO TOP AND TACK COAT
TO SIDES EXIST PAVEMENT
_�� SURFACE
o O O
COMPACT TO 95% OF MAX SEE NOTE 1 '
DENSITY UNPAVED AREAS
NOTES;
MAXIMUM WIDTH OF TRENCH AT TOP OF PIPE
' 30° FOR PIPE UP TO AND INCLUDING 12° NOMINAL DIAMETER.
OD PLUS 16" FOR PIPE URGER THAN 12" NOMINAL DIAMETER.
WHERE TRENCH IS PERPENDICULAR TO TRAVELED LANES, BACKFILL
FULL DEPTH WITH CRUSHED SURFACING -TOP COURSE. WHERE
TRENCH IS PARALLEL TO TRAVELED LANES, BACKALL THE TOP
4' OF TRENCH TO SUBGRADE WITH CRUSHED SURFACING -TOP
COURSE. SUITABLE EXCAVATED MATERIAL MAY BE USED
PROVIDED 95% MAX. COMPACTION DENSITY CAN BE ACHIEVED.
-r✓. ` 'NEAT-LINE TRENCH (TYP) WHEN
DEPTH IS LESS THAN FT
-�- "CRUSHED SURFACING -TOP
MIN COURSE" PER WSOOT STD SPEC
9- 03.9(3). COMPACT TO 95%
MAX DENSITY, SEE NOTE 2
GRAVEL BORROW" PER WSOOT
STD SPEC 9-03.14.
COMPACT TO 95% OF MAX
DENSITY, SEE NOTE 2
PAVED AREAS
NTS
Utility Trench Section
5
12 "9
FIBER JC
PLUG TO BE SEALED
- IN SAME MANNER AS
MAIN SEWER JOINTS.
CONCRETE
CLASS 3000
3/4"
NIS
Sanitary Sewer Cleanout
- MANHOLE FRAME AND COVER
SEE DRAWING BR29
6" (SP PAGE 8074)
12" MAX. 4"
ADJUSTMENT (4" MIN.)
CONE
D.
RUBBER GASKETED JOINTS IN
ACCORDANCE WITH ASTM C -443
STEPS - 3/4° DEFORMED BAR
STEPS SHALL BE INCLUDED
T
N. CONCRETE RISER BY PIPE INC.,
OR APPROVED EQUAL.
'A' --- --
12" (TYP) MAX. PIPE SIZE - 'E'
Z"�_ LADDER -STO. ALUMINUM OR
GALVANIZED STEEL
MORTAR FLLEi
/ 'Z'/-CGNCRETE SHELF
1% PRECAST BASE SECTION OR
CAST IN SHELF.
FA
B, r,
" 6" MIN. (TYP)
SANITARY MANHOLE TYPICAL DETAIL
NOT TO SCALE
Pressure
PSI
'B'
z
Y
��s
48" MH
48"
yo�
5 "MIN
24° MIN.
2 7" LD.
54" MH
54"
8" MIN.
SURFACE RESTORATION-
AS SPECIFIED
MOUND 4" MIN
"GRAVEL BORROW" PER -
WSDOT STD SPEC 9 -03.14
COMPACT TO 90% OF MAX
DENSITY
BENCH AS NEEDED FOR
SHORING OR TRENCH BOX
(TYP) WHEN DEPTH IS 4'
AND GREATER
"BEDDING MATERIAL
3/4" SQUARES SPACED - 3/4"
AS INDICATED - HT. 1/8
/� ❑ � _� 1/2"
❑ ❑❑ ❑❑ �-
r ❑
RAISE -1/2"
WIDE BORDER
1'•
/ SAWCUT (TYR) APPLY
JOINT SEALANT AR4000W
12° TO TOP AND TACK COAT
TO SIDES EXIST PAVEMENT
_�� SURFACE
o O O
COMPACT TO 95% OF MAX SEE NOTE 1 '
DENSITY UNPAVED AREAS
NOTES;
MAXIMUM WIDTH OF TRENCH AT TOP OF PIPE
' 30° FOR PIPE UP TO AND INCLUDING 12° NOMINAL DIAMETER.
OD PLUS 16" FOR PIPE URGER THAN 12" NOMINAL DIAMETER.
WHERE TRENCH IS PERPENDICULAR TO TRAVELED LANES, BACKFILL
FULL DEPTH WITH CRUSHED SURFACING -TOP COURSE. WHERE
TRENCH IS PARALLEL TO TRAVELED LANES, BACKALL THE TOP
4' OF TRENCH TO SUBGRADE WITH CRUSHED SURFACING -TOP
COURSE. SUITABLE EXCAVATED MATERIAL MAY BE USED
PROVIDED 95% MAX. COMPACTION DENSITY CAN BE ACHIEVED.
-r✓. ` 'NEAT-LINE TRENCH (TYP) WHEN
DEPTH IS LESS THAN FT
-�- "CRUSHED SURFACING -TOP
MIN COURSE" PER WSOOT STD SPEC
9- 03.9(3). COMPACT TO 95%
MAX DENSITY, SEE NOTE 2
GRAVEL BORROW" PER WSOOT
STD SPEC 9-03.14.
COMPACT TO 95% OF MAX
DENSITY, SEE NOTE 2
PAVED AREAS
NTS
Utility Trench Section
5
12 "9
FIBER JC
PLUG TO BE SEALED
- IN SAME MANNER AS
MAIN SEWER JOINTS.
CONCRETE
CLASS 3000
3/4"
NIS
Sanitary Sewer Cleanout
- MANHOLE FRAME AND COVER
SEE DRAWING BR29
6" (SP PAGE 8074)
12" MAX. 4"
ADJUSTMENT (4" MIN.)
CONE
D.
RUBBER GASKETED JOINTS IN
ACCORDANCE WITH ASTM C -443
STEPS - 3/4° DEFORMED BAR
STEPS SHALL BE INCLUDED
T
N. CONCRETE RISER BY PIPE INC.,
OR APPROVED EQUAL.
'A' --- --
12" (TYP) MAX. PIPE SIZE - 'E'
Z"�_ LADDER -STO. ALUMINUM OR
GALVANIZED STEEL
MORTAR FLLEi
/ 'Z'/-CGNCRETE SHELF
1% PRECAST BASE SECTION OR
CAST IN SHELF.
FA
B, r,
" 6" MIN. (TYP)
SANITARY MANHOLE TYPICAL DETAIL
NOT TO SCALE
Pressure
PSI
'B'
'C'
'D'
22 -1/2"
48" MH
48"
6" MIN.
5 "MIN
24° MIN.
2 7" LD.
54" MH
54"
8" MIN.
5.5" MIN.
24° MIN.
24" I.D.
fi0" MH
60"
8" MIN.
6° MIN.
42" MIN.
30" LD.
750
6"
300
8,500
12,000 6,510
3,320
1,700
w
300
15,100
REQUIRED PAVEMENT RESTORATION-
5,880
3,020
10"
275
21,620
30,570 16,540
PER CITY OF RENTON TRENCH
4,330
12"
250
33,930
48,000 25,950
13,260
RESTORATION AND STREET OVERLAY
14"
d
46,200
M
18,030
9,240
RED'S
SURFACE RESTORATION-
AS SPECIFIED
MOUND 4" MIN
"GRAVEL BORROW" PER -
WSDOT STD SPEC 9 -03.14
COMPACT TO 90% OF MAX
DENSITY
BENCH AS NEEDED FOR
SHORING OR TRENCH BOX
(TYP) WHEN DEPTH IS 4'
AND GREATER
"BEDDING MATERIAL
3/4" SQUARES SPACED - 3/4"
AS INDICATED - HT. 1/8
/� ❑ � _� 1/2"
❑ ❑❑ ❑❑ �-
r ❑
RAISE -1/2"
WIDE BORDER
1'•
/ SAWCUT (TYR) APPLY
JOINT SEALANT AR4000W
12° TO TOP AND TACK COAT
TO SIDES EXIST PAVEMENT
_�� SURFACE
o O O
COMPACT TO 95% OF MAX SEE NOTE 1 '
DENSITY UNPAVED AREAS
NOTES;
MAXIMUM WIDTH OF TRENCH AT TOP OF PIPE
' 30° FOR PIPE UP TO AND INCLUDING 12° NOMINAL DIAMETER.
OD PLUS 16" FOR PIPE URGER THAN 12" NOMINAL DIAMETER.
WHERE TRENCH IS PERPENDICULAR TO TRAVELED LANES, BACKFILL
FULL DEPTH WITH CRUSHED SURFACING -TOP COURSE. WHERE
TRENCH IS PARALLEL TO TRAVELED LANES, BACKALL THE TOP
4' OF TRENCH TO SUBGRADE WITH CRUSHED SURFACING -TOP
COURSE. SUITABLE EXCAVATED MATERIAL MAY BE USED
PROVIDED 95% MAX. COMPACTION DENSITY CAN BE ACHIEVED.
-r✓. ` 'NEAT-LINE TRENCH (TYP) WHEN
DEPTH IS LESS THAN FT
-�- "CRUSHED SURFACING -TOP
MIN COURSE" PER WSOOT STD SPEC
9- 03.9(3). COMPACT TO 95%
MAX DENSITY, SEE NOTE 2
GRAVEL BORROW" PER WSOOT
STD SPEC 9-03.14.
COMPACT TO 95% OF MAX
DENSITY, SEE NOTE 2
PAVED AREAS
NTS
Utility Trench Section
5
12 "9
FIBER JC
PLUG TO BE SEALED
- IN SAME MANNER AS
MAIN SEWER JOINTS.
CONCRETE
CLASS 3000
3/4"
NIS
Sanitary Sewer Cleanout
- MANHOLE FRAME AND COVER
SEE DRAWING BR29
6" (SP PAGE 8074)
12" MAX. 4"
ADJUSTMENT (4" MIN.)
CONE
D.
RUBBER GASKETED JOINTS IN
ACCORDANCE WITH ASTM C -443
STEPS - 3/4° DEFORMED BAR
STEPS SHALL BE INCLUDED
T
N. CONCRETE RISER BY PIPE INC.,
OR APPROVED EQUAL.
'A' --- --
12" (TYP) MAX. PIPE SIZE - 'E'
Z"�_ LADDER -STO. ALUMINUM OR
GALVANIZED STEEL
MORTAR FLLEi
/ 'Z'/-CGNCRETE SHELF
1% PRECAST BASE SECTION OR
CAST IN SHELF.
FA
B, r,
" 6" MIN. (TYP)
SANITARY MANHOLE TYPICAL DETAIL
NOT TO SCALE
NOTES:
1. STEPS TO BE 3/4° 0 DEFORMED BAR GALVANIZED SAFETY STEPS OR EQUAL.
2. STEPS ARE TO BE IN PUCE BEFORE MANHOLE SECTIONS ARE INSTALLED.
3. CASTING TO BE PER DRAWING BR29.
4. MANHOLE SECTIONS TO BE OF REINFORCED PRECAST CONCRETE.
5. ALL JOINTS SHALL BE GROUTED.
6. SANITARY SEWER MANHOLES SHALL HAVE ALL INTERIOR SURFACES, INCLUDING CHANNELING,
COATED (SEALED) WITH HIGH SOLIDS URETHANE COATING; WASSER MC- AROSHIELD OR
APPROVED EQUAL; COLOR OF COATING SHALL BE WHITE.
7. RUBBER GASKETED JOINTS SHALL BE IN CONFORMANCE WITH ASTM C -443,
B. CHANNEL HEIGHT SHALL BE A MINIMUM OF 3/4 THE INSIDE DIAMETER OF THE LARGEST PIPE.
9. CONNECTIONS TO MANHOLE SHALL BE MADE USING GPK ADAPTOR, KOR -N -SEAL BOOTS OR
APPROVED EQUAL
10. MANHOLES EQUAL TO AND GREATER THAN 20 FEET DEEP SHALL BE A MINIMUM 60" DIAMETER
AND HAVE A 'SURETRACK" CLIMBING AND FALL PROTECTION SYSTEM INSTALLED.
NTS
Sanitary Sewer Manhole - 48.}
5- 341501
CONCRETE BLOCKING SIZING PROCEDURE
A. GENERAL
THE AMOUNT OF CONCRETE REQUIRED TO ANCHOR HORIZONTAL BENDS,
TEES, AND DEAD ENDS DEPENDS ON THE STRENGTH OF THE SOIL THE
METHODS OF PLACING CONCRETE TO KEEP THE JOINT ACCESSIBLE IS
SHOWN IN FIGURE 1. THE AREA IN SQUARE FEET OF CONCRETE WHICH
MUST BEAR AGAINST THE SIDE OF THE TRENCH IS FOUND BY DIVIDING
THE THRUST IN POUNDS SHOWN IN TABLE 1 BY THE SAFE BEARING LOAD
OF THE SOIL AS SHOWN IN TABLE 2.
B. RC 1TERIA
1. THE SIZING PROCEDURE IS FOR HORIZONTAL OR DOWNWARD
THRUST ONLY.
2, HEIGHT OF THE THRUST BLOCK MUST BE EQUAL TO OR LESS
THAN 1/2 THE DEPTH FROM THE GROUND SURFACE TO THE BLOCK
BASE.
3. THE THRUST BLOCK BEARING FACE IS APPROXIMATELY
RECTANGULAR.
4. THE CONCRETE BLOCKING SHALL BE AS PER APWA
SPECIFICATION 74 -2.14.
C. SYMBOLS
D = OUTSIDE DIAMETER OF PIPE IN FEET
T = THRUST IN POUNDS AT THE FITTING (TABLE 1)
SBL = SAFE BEARING LOAD IN POUNDS /SO. FT. (TABLE 2)
H = DEPTH OF TRENCH IN FEET
W = WIDTH OF TRENCH IN FEET
A = AREA OF CONCRETE WHICH MUST BEAR AGAINST
THE SIDE OF THE TRENCH IN SQ. FE
HM = MAXIMUM HEIGHT OF THE THRUST BLOCK IN FEET
DC = DEPTH OF THE CONCRETE THRUST BLOCK TO
BEARING SURFACE IN FEET
LM = MAXIMUM LENGTH OF THE THRUST BLOCK IN FEET
h
GROUND
Hm h
2 +
BLOCK BASE,
I` DC
VV -'
D. CALCULATION EQUATIONS
1. Area of Concrete (A) = Thrust AL Pounds _ T
Safe Bearing Load in Pounds Sq.. R.) SBL
2. Maximum Height of Thrust Block (Hm) = Depth of Trench m Feet =_h
2 2
(Width of Trench in Feet) -
3. Depth of Concrete Thrust Block - (Outside Diameter of Pipe in Feet) = W -d
2 2
T. Maximum Length of Thrust Block (Lm) = Area of Concrete = A
Maximum Height Hm
5. Required Amount of Concrete (Cu. Yd.)_ Height x Depth x Length) x 0.03704
- Hm x Lm x Dc) x 003704
E. EXAMPLE
1. Problem:
Calculation of the amount of concrete required to block a 90' bend in an 8"
C.I. water main; the normal operating pressure in the pipe will be 65 psi
and the soil condition in the area indicates sand and gravel.
2. Solution;
-- Maximum testing pressure (See Table 1) = 300 psi.
- Outside diameter of 8" pipe = 9.05 in. = 9.05/12
- Go to Table 1: The testing pressure of 300 psi, we see
that the thrust on a 90' bend is 21,360 pounds.
Pressure
PSI
'B'
'C'
'D'
22 -1/2"
48" MH
48"
6" MIN.
5 "MIN
24° MIN.
2 7" LD.
54" MH
54"
8" MIN.
5.5" MIN.
24° MIN.
24" I.D.
fi0" MH
60"
8" MIN.
6° MIN.
42" MIN.
30" LD.
NOTES:
1. STEPS TO BE 3/4° 0 DEFORMED BAR GALVANIZED SAFETY STEPS OR EQUAL.
2. STEPS ARE TO BE IN PUCE BEFORE MANHOLE SECTIONS ARE INSTALLED.
3. CASTING TO BE PER DRAWING BR29.
4. MANHOLE SECTIONS TO BE OF REINFORCED PRECAST CONCRETE.
5. ALL JOINTS SHALL BE GROUTED.
6. SANITARY SEWER MANHOLES SHALL HAVE ALL INTERIOR SURFACES, INCLUDING CHANNELING,
COATED (SEALED) WITH HIGH SOLIDS URETHANE COATING; WASSER MC- AROSHIELD OR
APPROVED EQUAL; COLOR OF COATING SHALL BE WHITE.
7. RUBBER GASKETED JOINTS SHALL BE IN CONFORMANCE WITH ASTM C -443,
B. CHANNEL HEIGHT SHALL BE A MINIMUM OF 3/4 THE INSIDE DIAMETER OF THE LARGEST PIPE.
9. CONNECTIONS TO MANHOLE SHALL BE MADE USING GPK ADAPTOR, KOR -N -SEAL BOOTS OR
APPROVED EQUAL
10. MANHOLES EQUAL TO AND GREATER THAN 20 FEET DEEP SHALL BE A MINIMUM 60" DIAMETER
AND HAVE A 'SURETRACK" CLIMBING AND FALL PROTECTION SYSTEM INSTALLED.
NTS
Sanitary Sewer Manhole - 48.}
5- 341501
CONCRETE BLOCKING SIZING PROCEDURE
A. GENERAL
THE AMOUNT OF CONCRETE REQUIRED TO ANCHOR HORIZONTAL BENDS,
TEES, AND DEAD ENDS DEPENDS ON THE STRENGTH OF THE SOIL THE
METHODS OF PLACING CONCRETE TO KEEP THE JOINT ACCESSIBLE IS
SHOWN IN FIGURE 1. THE AREA IN SQUARE FEET OF CONCRETE WHICH
MUST BEAR AGAINST THE SIDE OF THE TRENCH IS FOUND BY DIVIDING
THE THRUST IN POUNDS SHOWN IN TABLE 1 BY THE SAFE BEARING LOAD
OF THE SOIL AS SHOWN IN TABLE 2.
B. RC 1TERIA
1. THE SIZING PROCEDURE IS FOR HORIZONTAL OR DOWNWARD
THRUST ONLY.
2, HEIGHT OF THE THRUST BLOCK MUST BE EQUAL TO OR LESS
THAN 1/2 THE DEPTH FROM THE GROUND SURFACE TO THE BLOCK
BASE.
3. THE THRUST BLOCK BEARING FACE IS APPROXIMATELY
RECTANGULAR.
4. THE CONCRETE BLOCKING SHALL BE AS PER APWA
SPECIFICATION 74 -2.14.
C. SYMBOLS
D = OUTSIDE DIAMETER OF PIPE IN FEET
T = THRUST IN POUNDS AT THE FITTING (TABLE 1)
SBL = SAFE BEARING LOAD IN POUNDS /SO. FT. (TABLE 2)
H = DEPTH OF TRENCH IN FEET
W = WIDTH OF TRENCH IN FEET
A = AREA OF CONCRETE WHICH MUST BEAR AGAINST
THE SIDE OF THE TRENCH IN SQ. FE
HM = MAXIMUM HEIGHT OF THE THRUST BLOCK IN FEET
DC = DEPTH OF THE CONCRETE THRUST BLOCK TO
BEARING SURFACE IN FEET
LM = MAXIMUM LENGTH OF THE THRUST BLOCK IN FEET
h
GROUND
Hm h
2 +
BLOCK BASE,
I` DC
VV -'
D. CALCULATION EQUATIONS
1. Area of Concrete (A) = Thrust AL Pounds _ T
Safe Bearing Load in Pounds Sq.. R.) SBL
2. Maximum Height of Thrust Block (Hm) = Depth of Trench m Feet =_h
2 2
(Width of Trench in Feet) -
3. Depth of Concrete Thrust Block - (Outside Diameter of Pipe in Feet) = W -d
2 2
T. Maximum Length of Thrust Block (Lm) = Area of Concrete = A
Maximum Height Hm
5. Required Amount of Concrete (Cu. Yd.)_ Height x Depth x Length) x 0.03704
- Hm x Lm x Dc) x 003704
E. EXAMPLE
1. Problem:
Calculation of the amount of concrete required to block a 90' bend in an 8"
C.I. water main; the normal operating pressure in the pipe will be 65 psi
and the soil condition in the area indicates sand and gravel.
2. Solution;
-- Maximum testing pressure (See Table 1) = 300 psi.
- Outside diameter of 8" pipe = 9.05 in. = 9.05/12
- Go to Table 1: The testing pressure of 300 psi, we see
that the thrust on a 90' bend is 21,360 pounds.
CAP
22 -1/2'
COUGHLIN PORTERLUNDEEN
A CONSULTING STRUCTURAL AND CIVIL ENGINEERING CORPORATION
413 PINE STREET - SUITE 300 P: 206/343 -0460
SEATTLE, WA 98101 F: 206/343 -5691
TEE
EXPIRES
45' BEND
1.4
N.E. 114 SEC. 25, T.23N., R.4E., W.M.
- Go to Table 2: Table 2 gives the safe bearing load for
sand and gravel: 3,000 lbs. /sq. ft.
- Go to Figure 1: figure 1 indicates the position
of the concrete for blocking the 90' bend.
- Go to the specifications of the project and find
depth of trench (h) = 4 feet
-Width of trench (W) = 3 feet
With the above assembled information,
we proceed to the final calculations:
- Area of Concrete (A) = Thrust = 7.1 360= 7,12 sq ft.
Safe Bearing Load 3,000
Depth of Trench is Feet
2
- Maximum Height of Thrust Block (Hm) _ h =4= 2,0 ft.
2 2
Depth of Concrete Thrust Block (Oc)
Width of Trench in Feet fW) - Outside Diameter of Pioe (d
=3:- 0.75= 1.13 ft. 2
2 Area of Concrete
- Maximum Length of Thrust Block (Lm) _
Height of Concrete
A = 7.12 =3.56 ft.
Hm 2.D
- Required Amount of Concrete = Height x Depth x Length) x 0.03704
= To x Lou x Dc) x 0.03704
= 2.0 x 3.56 x 1.13) x 0.03704
= 0.30 cu. yd.
TABLE 1
Size
Pressure
PSI
-EA
Tees
99 45'
22 -1/2"
CAP
22 -1/2'
COUGHLIN PORTERLUNDEEN
A CONSULTING STRUCTURAL AND CIVIL ENGINEERING CORPORATION
413 PINE STREET - SUITE 300 P: 206/343 -0460
SEATTLE, WA 98101 F: 206/343 -5691
TEE
EXPIRES
45' BEND
1.4
N.E. 114 SEC. 25, T.23N., R.4E., W.M.
- Go to Table 2: Table 2 gives the safe bearing load for
sand and gravel: 3,000 lbs. /sq. ft.
- Go to Figure 1: figure 1 indicates the position
of the concrete for blocking the 90' bend.
- Go to the specifications of the project and find
depth of trench (h) = 4 feet
-Width of trench (W) = 3 feet
With the above assembled information,
we proceed to the final calculations:
- Area of Concrete (A) = Thrust = 7.1 360= 7,12 sq ft.
Safe Bearing Load 3,000
Depth of Trench is Feet
2
- Maximum Height of Thrust Block (Hm) _ h =4= 2,0 ft.
2 2
Depth of Concrete Thrust Block (Oc)
Width of Trench in Feet fW) - Outside Diameter of Pioe (d
=3:- 0.75= 1.13 ft. 2
2 Area of Concrete
- Maximum Length of Thrust Block (Lm) _
Height of Concrete
A = 7.12 =3.56 ft.
Hm 2.D
- Required Amount of Concrete = Height x Depth x Length) x 0.03704
= To x Lou x Dc) x 0.03704
= 2.0 x 3.56 x 1.13) x 0.03704
= 0.30 cu. yd.
TABLE 1
Size
Pressure
PSI
Thrust at Fittings in Pounds
Tees
99 45'
22 -1/2"
11 -1/4"
cover over the pipe
exceeds 2 feet.
Dead Ends
Bend Bend
Bend
Bend
3"
300
2,120
3,000 1,630
830
430
4°
300
3,780
5,370 2,910
1,470
750
6"
300
8,500
12,000 6,510
3,320
1,700
B"
300
15,100
21,360 11,550
5,880
3,020
10"
275
21,620
30,570 16,540
8,430
4,330
12"
250
33,930
48,000 25,950
13,260
6,780
14"
250
46,200
65,370 35,340
18,030
9,240
16"
225
45,250
64,000 34,620
17,650
9,050
18"
200
50,900
72,000 38,940
19,860
10,180
20"
200
62,840
88,900 48,080
24,520
12,560
24"
200
90,480
127,980 69,200
35,320
18,100
30"
200
141,370
199,960 108,150
55,140
28,280
36"
200
203,580
1 287,950 1 155,740
79,400
1 40,720
TABLE 2
Safe Bearing Loads in Lb./Sq. Ft.
The safe bearing loads given in the
following table are for
horizontal thrusts when the depth of
cover over the pipe
exceeds 2 feet.
Safe Bearing Load
SOIL
Lb per SQ. Ft
'Muck, peat, etc.
0
Soft Clay
1,000
Send
2,000
Sand and Gravel
3,000
Bond and Gravel Cemented with Clay
4,000
Hord Shale
10,000
"in muck or peat, all thrusts shall be restrained by piles or
tie rods to solid foundations or by removal of muck
or peat and replacement with ballast of sufficient
stability to resist thrusts.
44L3
11 -i/4'
FIGURE i
NOTE: FOR CONVEX VERTICAL BENDS BLOCKING
SEE APWA STANDARD PLAN NO. 73.
I
Western Washington DPC
Renton, We
WATER AND SEWER DETAILS
RS
Concrete Blocking Sizing Procedure
Checked for Compliance to City Standards
SHEET
X3.11