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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
bear* load of the soil as shown in Table 2.
B. SiI3ilERIA
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
e concrete blocking shall be as per APWA
SYM pacification 74-2.14.
C.
d = Outside Diameter of Pipe in Feet
T = Thrust in Pounds at the Fitting (Table 1)
SBL = Safe Bearing Load in Pounds/Sq. 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. Ft.
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
GROUND SUFACE
h I_ d
LH 2 +
BLOCK BASE
--{I Dc
r"- W -•
D. CALCULATION EQUATIONS
1. Area of Concrete (A) = Thrust (In Pounds - T
Safe Bearing Load (In Pounds/Sq. Ft.) SDL
Depth of Trench in Feet In
2. Maximum Height of Thrust Block (Hm) = 2 - 2
(Width of Trench in Feet) -
(Outside Diameter of Pipe in Feet) W-d
3. Depth of Concrete Thrust Block =
RENTON EMPORIUM LLC
PART OF THE N. E. 1/4 OF THE S.W. 1/4 OF SECTION 18,
- 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 (lilt = 3 feet
With the above assembled information,
we proceed to the final calculations: CAP
Thrust =21,360 _ 7/ o
- Area of Concrete (A) = Safe Bearing Load 3,000 - .12 sq ft. 22-1 2
- Depth of Trench in Feet
Maximum Height of Thrust Block (Hm) =
2
h _ 4 = 2.0 ft.
2 2
- Depth of Concrete Thrust Block (Dc)
- Width of Trench in Feet (W) - Outside Diameter of Pipe (d)
2
3 - 0.75 = 1.13 ft.
2
- Maximum Length of Thrust Block (Lm) = Area of Concrete
Height of Concrete
A - 7.12=3.56ft.
im 2.0
- Required Amount of Concrete = (Height x Depth x Length) x 0.03704
= (Hm x Lm x Dc) x 0.03704
= (2.0 x 3.56 x 1.13) x 0.03704
= 0.30 cu. yd.
TART F 1
`
Size
Pressure
PSI
Thrust at Fittings in Pounds
Tees
90,
45'
22-1 /2
11-1/4'
Dead Ends
1 Bend
Bend
Bend
BBend
3"
300
2,120
3,000
1,630
830
430
4"
300
3,780
5,370
2.910
1,470
-50
6"
300
8,500
12,000
6,510
3,320
I1,700
8"
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 1203.580
287.950
155.740
79,400
40,720
450BEND
TEE
E"
��q
Q
11-1/4a I 90 BEND
FIGURE 1
2 2
_ Area of Concrete
4. Maximum Length of Thrust Block Lm A
( )
TABLE 2 NOTE: FOR CONVEX
Safe Bearing Loads in F
J.�/�• Ft.
VERTICAL BENDS BLOCKING
Maximum Height Hrt
9 SEE APWA STANDARD
PLAN NO. 73.
5. Required Amount of Concrete (Cu. Yd.) _ (Height x Depth x Length) x 0.03704
The safe bearing loads given in the following table are for
_ (Hm x Lm x Dc) x 0.03704
horizontal thrusts when the depth of cover over the pipe
exceeds 2 feet.
E. EXAMPLE
Safe Bearing Load
:
S21L Lb. ep r Sq. Ft. CONCRETE BLOCMG SIZING PROCEDURE
Calculation of the amount of concrete required to block a 90' bend in an 8"
oft Claeat, etc. 0
y ADOPTED
C.I. water main; the normal operating premre in the pipe will be 65 psi and the sop
Sand 2,0 9
STANDARD PLANS
condition in the area indicates sand and ravel.
g
Sand and Gravel 3,000
Sand and Gravel Cemented with Clay 4,000 CITY OF RENTON
LST DATE: 12/96
2'
Hard Shale 10,000
- Maximum testing pressure (See Table 1) = 300 psi. = 075 ft
- Outside diameter of 8" pipe = 9.05 in. = 9.05/12
*In muck or peat, oil thrusts shall be restrained by piles or DWG. NAME: BR26
SP PAGE: 8085
- Go to Table 1: The testing pressure of 300 psi, we see
that the thrust on a 90' bend is 21,360 pounds.
tie rods to solid foundations or by removal of muck
or eat and replacement with ballast of sufficient
stability to resist thrusts.
FIRE HYDRANT SHALL BE COREY-TYPE EQUAL TO IOWA F-5110
18" TO 20" BEHIND BACK OF CURB
OR COMPRESSION TYPE SUCH AS CLAW MEDALLION; M & H 929
AND MUELLER SUPER CENTURION 200 WITH 6" MECHANICAL JOINT
OR 12" BEHIND BACK OF SIDEWALK
FLUSH WITH FINISH GRADE
INLET WITH LUGS.
THAT IS ADJACENT TO CURB
(TYPICAL)
5-1/4" MAIN VALVE OPENING. TWO 2-1/2' HOSE CONNECTIONS
NATIONAL STANDARD
THREADS. 4" PUMPER CONNECTION CITY OF
SEATTLE THREADS WITH A STORTZ ADAPTOR, 4" SEATTLE THREAD
I
!
TWO-PIECE CAST IRON VALVE BOX NTH LUG TYPE COVER.
EQUAL TO OLYMPiC FOUNDRY CO. STANDARD 8" TOP SECTION WITH
X 5" STORTZ, ATTACHED NTH 1/8" STAINLESS STEEL CABLE.
REGULAR BASE SECTION LENGTH TO FIT. VALVE NUT EXTENSION
1-1/4" PENTAGON OPERATING NUT. FIRE HYDRANT TO BE
PAINTED WITH TWO COATS OF PAINT. PRESERVATIVE
PAiNT No. 43-M
MAX 4"
MIN 2
AS REQUIRED (SEE DWG BR46 / PAGE B090). �'
l
RAISED PAVEMENT MARKER
r` i
,�'� �1
?
"
12 -16
CLEARANCE
SAFETY YELLOW OR APPROVED EQUAL.
TYPE 88 A8 UNION
(TYPICAL)
PUMPER CONNECTION TO FACE ROADWAY ASSEMBLY.
STIMSONITE TWO-WAY BLUE.
!�•
FIRE HYDRANT EXTENSION TO BE USED IF REWIRED.
;
30"
MIN.
42" MIN
BURY
CONCRETE BLOCKING
(
i _
6" CLEARA
__
FM HYDRANT ASSEMY DETAIL
ADOPTED STANDARD PLATS
CITY or RQIMN LST DATIC: 12/96
DWI NAME: OR24 SP PAGE: B102
EXISTING 8" C.I. WATER LINE
TESTING DETAIL
f8 FT
CONCRETE BLOCKING
ill
CAST IRON TEE. WITH 6" FLANGE SIDE OUTLET.
\\\ C \
_ `-6" GATE VALVE (FL X MJ) AWWA C-509, RESILIENT SEAT
6" DUCTILE IRON PIPE, CLASS 52 CEMENT LINED, LENGTH TO FIT TWO 3/4"
STEEL TIE RODS. SEE STD DETAIL FOR TIE RODS.
16" x 8" x 4" MININUM
CONCRETE BLOCK
UNDER HYDRANT 1/3 CU. YD. WASHED DRAIN ROCK (3" TO 3/8")
FIRE HYDRANT ASSEMBLY
EXISTING 8' C.I. WATER LINE
FINAL CONNECTION DETAIL
NEW 8"D.I. WATER LINE AdElk NEW 8"1I. WATER LINE
ONNW
O
I I I I A I I �I L-.
INSERT 8" CLEANING 'POLY -PIG" IN: A FIER ALL TESTING, CLEANING AND DISINFECTION,
8"x8" VERTICAL CROSS(MJxFL) REMOVE TEMP. BLOCK & BLOW -OFF & CONNECT
2-8" BLIND FLANGES(ONE W/2"TAP elk 2"PLUG) WITH 1-8-SLEEVE (MJ)
1-8" PLUG(MJ) W/2"TAP & 2' BLOW -OFF & 8" D.I. SPOOLS AS REWIRED
TEMP. BLOCK
CUT -IN: ropliII
8'x8" TEE (fit) W/ CONC. BLOCK
2-8" GATE VALVES (FLxMJ)
1-8" FLxMJ ADAPTOR
2-8" SOLID SLEEVES (MJ) OR RO-MAC COUPLINGS
1-8" PLUG (MJ) W/2"TAP & TEMP. BLOW -OFF
TEMP. BLOCK
EXISTING 8" C.I. WATER LINE PLAN ViEW EXISTING 8" C.I. WATER LINE
O8" X 8" CUT -IN TO EXISTING 8" CAST-IRON WATER LINE
ws�p
1
TOWNSHIP 23N, RANGE 5E, W.M.
CAUTION VALVE BOX SHOULD NOT REST ON PIPE.
LATER COMPACTION IN AREA OF VALVE BOX COULD
CAUSE THE BREAKAGE OF THE SERVICE.
b v�� v v 0
5 1-1,/2" AND 2" WATER SERVICE DETAIL
MATERIAL LIST FOR 2" SERVICE WITH METER LOCATED IN RIGHT-OF-WAY BEHIND SIDEWALK 8
1. 2" tapped tee.
2. 6" long X 2" brass nipple with threaded ends (MIPT).
3. 2" double disc gate valve (full opening for tapping) with threaded ends, square
operating nut and valve nut extension if required (dwg BR41 /page B090).
4. Two piece cost iron valve box. Standard 8" top section with regular base section,,
length to fit, "lug" type cover.
5. 2" brass bushing (MIPT x FIPT)
2 each 2" brass or bronze nipples 6" length, threaded ends
2 each 2"-90' brass or bronze elbows (FIPT x RPT)
6. 2" (MIPT) x compression fitting, Ford C84-66 or equal.
7. 2" soft copper tubing type "K', length to fit.
8. 2" pack -joint 90' ell, for Ford L44-77 or equal.
9. 2" Customsetter with by-pass Ford VFH 77-12B x 17-3/16" or equal, with flanged
angle valve and padlock wings on inlet, and angle check valve outlet, ball valve on
bypass with padlock wings. Customsetter shall have vertical inlet and outlet.
10, Rigid meter spreader to be supplied and installed in meter setter by contractor.
11. Water meter shall be supplied and installed by City of Renton upon payment of all
related water meter fee and satisfactory pressure and purity tests.
12. 17"x28" concrete meter box with 3/8" steel diamond -plate cover equal to Fog Tite
Meter Sea! Co. No. 2T. Meter box shall be double stacked.
13. The property owner is responsible for any necessary adaptation or extension of
water service.
FOR 3/4" TO 2" DCVA, USE FOGTITE CONCRETE METER
BOX NO. 2T (17%28") WITH 3/8" STEEL COVER PLATE
METER BOX SHALL BE DOUBLE STACKED.
FOR 2-1/2" TO 3" DCVA, USE UTILITY VAULT CO. MODEL
25TA OR EQUAL.
30" MIN.
AFTER TESTING & APPROVAL, PLUG ALL
TEST COCKS WITH BRASS PLUGS.
TO CITY METER TO PRIVATE SYSTEM
1.
TETTEFlLFLBACSDSATISACTORIYY DEPARTMENT
OF HEALTH CERTIFIED BACKFLOW ASSEMBLY
TESTER.
L7/8" MINUS GRAVEL 12" MINIMUM TEST REPORT MUST BE SUBMITTED TO CITY
OF RENTON WATER UTILITY ENGINEERING
PRIOR TO ACTIVATION OF NEW UNE.
BELOW GROUND INSTALLATION FOR 3 /4" TO 3" DOUBLE
CHECK VALVE ASSEMBLIES
EXISTING 8' D.I. WATER LINE TESTING DETAIL
DOUBLE CHECK VALVE ASSMMLY
ADOPTED arAIM"au i LAM
Off or Nor" Uar DAM 12/96
UK. NAME BR.S' 4 SP PAGE 8101
EXISTING 8' D.I. WATER LINE
FINAL CONNECTION DETAIL
WATER MAIN
2" CLOSE NIPPLE
2" 90' ELBOW
CONCRETE BLOCKING
TWO PIECE CAST IRON VALVE -
EQUAL TO OLYMPIC FOUNDRY CO.
STANDARD 8" TOP SECTION, WITH
REGULAR BASE SECTION LENGTH
TO FI T.
2" GATE VALVE, SCREWED-
2" GALVANIZED -
PIPE 12" LONG
2" CLOSE NIPPLE
BETWEEN CAP OR PLUG
AND 2" 90' ELBOW
INSTALL 4 MIL POLYETHYLENE
PLASTIC COVER OVER WASHED
GRAVEL. CUT HOLE FOR PIPE
.10
� 00
y JV 0�04-%yl
PRIVATE PLUMBING
SHALL CONNECT HERE
MATERIAL
LIST FOR 1-I/2" SERVICE WITH METER LOCATED IN RIGHT -Of -WAY BEHIND SID WA K
1.
2" tapped tee.
2.
6" long X 2" brass nipple with threaded ends MIPT .
3.
2" double disc gate valve (full opening for tapping) with threaded ends, square
operating nut and valve nut extension if required (dwg BR46/page 8090).
CRUSHED ROCK BASE 4.
TO SUPPORT VAULT,
Two piece cast iron valve box. Standard 8" top section with regular base section,
length to fit, "lug" type cover.
5.
2" X 1-1/2" hex brass bushing (MIPT x FlPT)
2 each 1-1 /2" brass or bronze nipples 6" length, threaded ends
2 each 1-1/2"-90' brass or bronze elbows (FIPT x FIPT)
6.
1-1/2" (MIPT) x compression fitting, Ford C84-66 or equal.
7.
1-1/2" soft copper tubing type "K, length to fit.
8.
1-1/2" pack -joint 90' ell, for Ford L44-77 or equal.
9.
1-1/2" Customsetter with by-pass Ford VFH 66-12B x 13-3/16" or equal, with flanged
angle valve and padlock wings on inlet, and angle check: valve outlet, ball valve on
bypass with padlock wings. Customsetter shall have vertical inlet and outlet.
10.
Rigid meter spreader to be supplied and installed in meter setter by contractor.
11.
Water meter shall be supplied and installed by City of Renton upon payment of all
related water meter fee and satisfactory pressure and purity tests.
12.
17"x28" concrete meter box with 3/8" steel diamond -plate cover equal to Fog Tite
Meter Seal Co. No. 2T. Meter box shall be double stacked.
13.
The property owner is responsible for any necessary adaptation or extension of
water service.
1-1/2" & 2" !PATER SERVICE DETAIL
STANDARD PIAxs MODIFIED
LIST DATZ: 12/96 CITY OF )l32ffON
DWG. NAME. BR42A SP PAGE: BR107.2
Web,3031
IF ADDITIONAL ADJUSTMENT IS
REQUIRED, INSTALL 2-2"
CLOSE
r NIPPLE AND 2-2" 90' BEND, SCREWED
AT THIS POINT.
FIELD LOCATE
CONCRETE METER
BOX
2" CLOSE NIPPLE
PERMANENT
2" BLOW -OFF ASSEMBLY
2" 90' ELBOW
(FOR 8"
YAWS AND Ste)
1 2" GALVANIZED PIPE AS
REQUIRED
ADOPTED
STANDARD PLANS
FLAN
caTY 0r FJNM
LST DAT2: 12/96
VALVE NUT EXTENSION
AS REQUIRED
DWG. NAME: BR25A SP PAGE: B105
(SEE DWG BR46 / PAGE 8090)
�- GROUND LINE
6" MAX.
CONCRETE SIDEWALK
'
..,
2-1 /2" NST (HOSE)
BLOW -OFF HYDRANT EQUAL TO
#78 KUPFERLE FOUNDRY CO.
2"x2"x2" TEE
2" CLOSE NIPPLE BEWTEEN
TEE AND 90' ELBOW.
2" 90' ELBOW
2" GALVANIZED PIPE
18" LONG
1 O Goo �O
10 CU. FT. WASHED GRAVEL PASSING 18" MAX. G:ao n0,;- o3 0 2" CAP WITH 1/8"
1-1 / 2" AND RETAINED ON 1/4- MESH ° ° Q o oo� boo TAP FOR DRAIN
r a a so
FOR DRAIN
ELEVATION
THIS DRAWING IS INCLUDED FOR INFORMATION ONLY.
NEW 8' D.I. WATER LINE
O
• INSERT CLEANING 8-INCH "POLY -PIG" IN VERTICAL CROSS AFTER ALL TESTING, CLEANING AND DISINFECTION,
8"x8 TAPPING TEE (MJxFL)/W CONC. BLOCK
8" TAPPING GATE VALVE (FLA") 8"x8" VERTICAL CROSS(MJYFL) REMOVE TEMP. BLOCK & BLOW -OFF & CONNECT
8" PLUG (MJ) WITH 2" TAP & 2-8` BLIND FLANGES(ONE W/2"TAP & 2-PLUG) NTH 8" SLEEVE (MJ) & 8' D.I. SPOOLS
2" TEMP. BLOW -OFF ASSEMBLY 1-8" PLUG(MJ) W/2"TAP A 2" BLOW -OFF
TEMP. CONIC. BLOCK TEMP. BLOCK
PLAN VIEW
QWET -TAP CONNECTION TO EXISTING 8" D.I. WATERLINE
WATER UTILITY DETAILS
Scale: 1"=20'
CALL BEFORE
YOU DIG
1-800-424-5555
CHECKED FOR COMPLIANCE
TO CITY STANDARDS
Date4-
1W SV'm"-Date a /Z O Z-
Da to
DEVELOPER:
KEITH & ANNETTE DEMPS
2308 N.E. 24th STREET
RENTON, WA 98056
(425) 226-6632
RECOMMENDED
FOR APPROVAL
BY
BY
BY
SITE ADDRESS:
RENTON EMPORIUM LLC
S.W. SUNSET BLVD.
RENTON, WA 98055
ARCHITECT, -
FALL ARCHITECTURAL
9607 39th AVE. S.W.
SEATTLE, WA 98136
(206) 935-2240
ENGINEER:
jOHAN OYE P.E.
12202 PACIFIC AVE S
TACOMA, WA 98444
(253) 537-8128
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EX IRES: /26 2003
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SHEET NO,
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