HomeMy WebLinkAboutConstruction Details sheet 35TYPICAL SANITARY SEWER SPECIFICATIONS
TO BE USED FOR PRIVATE SEWER DEVELOPMENT
WITHIN
CLAY TOWNSHIP REGIONAL WASTE DISTRICT
REVISED SEPTEMBER, 2001
1. Standard specifications of the Clay Township Regional Waste District (the District) and Indiana Department of Transportation shall apply for all work and materials.
Pipe shall be installed in accordance with Section 715 of the latest edition of the Indiana Department of Transportation Standard Specifications.
2. Sanitary sewer pipe shall be PVC in accordance with ASTM D -3034 (S.D.R. 35) and ASTM 2321. PVC pipe shall have grooved bell and gasket. The pipe shall be
made of PVC plastic having a cell classification of 12454B.
3. PVC sewer fittings shall conform to the requirements of ASTM D- 3034 -89 specification. Fittings in sizes through 8" shall be molded in one piece with elastomeric
joints and minimum socket depths as specified in sections 6.2 and 7.3.2. Fittings 10" and larger shall be molded or fabricated in accordance with section 7.11 with
manufacturers standard pipe bells and gaskets. Wall thickness of fittings shall be SDR 26 as defined in section 7.4.1 of specifications. Gaskets for elastomeric joints
shall be molded with a minimum cross - sectional area of 0.20 square inches and conform to ASTM F -477 specification.
4. All sanitary manholes shall be "precast concrete" manholes in accordance with ASTM C -478 and Section 720. 0 -rings shall conform to C -443. Kent Seal or
equivalent shall also be applied to all joints and between riser rings and castings. Manhole step spacing shall be no more than 16- inches. Manholes shall be air
tested for leakage in accordance with ASTM C1244 -93, Standard Test Method for Concrete Sewer Manholes by the Negative Air Pressure (Vacuum) Test.
A Installation and operation of vacuum equipment and indicating devices must be in accordance with manufacturer's recommendations and performance specifications
which have been provided by the manufacturer and accepted by the Engineer.
B. With the vacuum tester set in place:
1. Inflate the compression band to forty (40) psi to effect a seal between the vacuum base and the structure.
2. Connect the vacuum pump to the outlet port with the valve open.
3. Draw a vacuum of ten (10) inches of Hg. and close the valve.
C. Accepted standards for leakage will be established from the elapsed time for a negative pressure change from ten (10) inches to nine (9) inches of mercury. The
maximum allowable leakage rate for a four (4) foot diameter manhole must be in accordance with the following:
Minimum Elapsed Time for a Manhole Depth Pressure Change of 1 Inch Hg
10 feet or less 60 seconds
>10 feet but <15 feet 75 seconds
>15 feet but <25 feet 90 seconds
For manholes five (5) feet in diameter, add an additional fifteen (15) seconds and for manholes six (6) feet in diameter, add an additional thirty (30) seconds to the
time requirements for four (4) foot diameter manholes. For all manholes deeper than twenty -five (25) feet, the Engineer will determine the applicable minimum
elapsed time.
D. If the manhole fails the test, necessary repairs must be made and the vacuum test and repairs must be repeated until the manhole passes the test.
E. If manhole joint sealants are pulled out during the vacuum test, the manhole must be disassembled and the joint sealants replaced.
F. Manholes will be subject to visual inspection with all visual leaks being repaired.
5. Butyl rubber coating shall be applied around each manhole joint from 6- inches above to 6- inches below each joint. The appropriate primer shall be applied prior
to applying the rubber coating. Inside joints to be filled with precoat plug material.
6. The manhole chimney's including all riser rings shall be sealed using Infi - Shield "Uniband" or approved equal. Prior to placement, the top 4- inches of the manhole
cone and casting frame shall be cleaned and primed. The Uniband shall extend from 3- inches below the top of the cone section to 2- inches over the flange of the
manhole casting frame.
7. The casting elevations are set by plan. However, the castings are to be adjusted in the field by the Engineer's representative, should a discrepancy occur between
plan grade and existing grade. New manhole ring and cover shall be installed to establish grade. Maximum height of adjusting rings shall be 12- inches.
8. Backfill around all structures and all cuts under paved areas with granular material. Trenches opening within 5 -feet of paved roadways shall be backfilled with
granular material in accordance with Section 211. Backfill under sidewalks shall be granular, unless the walks are constructed a minimum of 6 months after backfill
has been in place.
9. The Contractor shall be responsible for verifying that all state highways, city, and county permits have been obtained by the developer prior to start of
construction.
10. The Contractor shall be required to furnish the developer's Engineer with a set of ;_- rints, marked in red pencil, showing actual sewer location and invert, to include
lateral location, depth and length. Such "as built" prints must be received by the Engineer before the final contract payment can be authorized. The sanitary sewer
laterals and stubs termination shall be indicated on the surface with a metal fence post ,et immediately above the said termination point.
11. All sanitary sewer lines upon completion will be required to pass a low pressure air test. Said test shall be conducted according to ASTM 1417 -92, and shall be
witnessed by an Engineer and a representative of the District. The testing shall be in accordance with Table 1. Add 0.5 psig for each foot of water above the sewer
line being tested.
12. Deflection tests shall be performed on all flexible* pipe after the final backfill has bee . i,1 place at least 30 days. No pipe shall exceed a vertical deflection of 5
% deflection test results. ( *The following are considered non - flexible pipes: concrete pipe, cuctile iron pipe, and cast iron pipe). The deflection test shall be
performed with a nine -point mandrel. Proving rings shall be available.
13. All mandrel testing shall be observed by a professional engineer representative for certification and a representative of the District.
14. The ends of laterals are to be plugged tight with a braced plastic disc or cap capable of withstanding a low pressure air test without leakage.
15. Bedding for flexible pipe shall be No. 8 crushed stone from 6- inches below the pipe to 12- inches above the pipe. Bedding for rigid pipe shall be No. 8 crushed
stone from 6- inches below the pipe to the spring line of the pipe and from this point to 12- inches above shall be fill sand or equivalent. Manholes shall be placed
on no less than 6- inches of No. 8 crushed stone bedding.
16. Water and sewer line crossings and separations shall be in accordance with 327 IAC 3 -6 -9.
17. Trench shall be opened sufficiently ahead of pipe laying to reveal obstruction, and shall �De properly protected and /or barricaded when left unattended.
18. No water shall be permitted to flow into the sanitary sewer system during construction. Contractor shall utilize a pump to keep the water level below the pipe.
Pump discharge shall be directed to a storm outlet in accordance with state and federal laws and regulations (327 IAC 3- 6 -20). Any pipe entering existing sewers
shall be plugged with screw type mechanical, braced plug until such time as all tests on the sewers have been completed and the lines have passed all punch lists.
In
19. All sewer laterals installed by the mainline Contractor shall be bedded the some as the r:: yin line sewer.
20. Forty -eight (48) hours notice shall be given to the District prior to the start of sewer construction. Also, 48 hours notice shall be given prior to doing any
testing on the sewer.
21. Manhole castings shall be stamped "SANITARY SEWER" (Neenah Casting R 1642 or equal) and be self - sealing type. Waterproof castings shall be Neenah
R- 1916 -F1 and stamped "SANITARY SEWER ".
22. The minimum slopes for sewer acceptance by the District are: Size of Pipe Minimum Constructed Slope
8 -inch % 0.40
10 -inch % 0.28
12 -inch % 0.22
15 -inch % 0.15
18 -inch % 0.12
23. The Contractor shall provide measurements of the slope of the sewer for each manhole section as construction progresses. Such measurements shall be certified
by a Registered Land Surveyor or Engineer and be available on -site for observation by the District's Inspector. No more than three manhole sections can be
constructed in advance of such measurements.
24. In the event the Contractor does not meet the minimum slopes, the sewer section and any other affected sewer sections shall be reconstructed to meet such
minimum slopes.
25. Laterals are to be traced with a minimum size of 14 gauge wire from the wye to the terminus. The contractor for the building or home will extend the wire from
this terminus to the building cleanout adjacent to the building.
S: \Legal\SanitarySewerSpecification
November 12, 2001
TAl3Ll 1 TABLE I
MINIMUM SPI CIFIU) TINIF IillQ[)IRED ):012 A 1.0 psig
DROP FOR SIZE AND LENGTI-I OF PIPE 1NDICATFD
Pipe
17ia1ne r
�lininnun
'lime;
Length for
Minimum
T>1ns for
Longer
--
Spec rtlealion'I'inle Ic» i..zn¢th
_
(L)
Sho��1t, mints
W
Q
In
...
ruin :s
7 34
'Time, ft
_ _
386 ..
298
bens th S
....:_
0.360 L
0,854 L
1.�?() L
I0 ft 150 ft ^UO li 250 It
3:46 3 46 3 46 3:46 ..^
-
5 4U , 5.40 5:40 S:4U
7 i4 7.34 7 34 7:3 !
-
300 ff
.. 3.4G
S 40
7 .i6
-
35U tt
3 46
__
S 4U
8 42
4001't
3:4G
5.42
10:08
450 ft
__..
3.46
6 24
I1 24
$
_ ....
10
__
8.76
_
239
- 23 74I,
9:28 9 R 9:28 9.fi3
11 52
1x :51
1S 49
17:48'
25:3 8
-....
12
_
11:20
149
3.4••181.
1120 11: "LO _ll.''��#\�14 15
l7:OS
19 58
22:47
3 36
47 4-1
16
14 0
158 _
5:342 L
14:10 1-4 i t) 17:48 22:1 a
26 42
31:09
t8
17 :00
133
7:68'? L
_...
17 0U. 19:13 'S`.38 3203
Zfi:27
44 52
51 lb
57:41
:_
19:50
_
114
10 L
_ ...
18:fiU 2b 10 34:54 4.3.37
52:21
61:00
69 4K
78 31
21
"22:40
8y...
_
1 ; :Ci74 L
_.�
22 :47> 34:i1 45 34 ... 56 58
68:22
_
79 4tI
.-
91 :1(i
_f _1K
10':33
-
27
5:30
88
17.:106 L_._
"
:_.,'8'S1 4a' 16 S7:4I ZY U7
-
8E� :32 °.-
1{lU 5?
.
198
_ .. �(}
33
2820
,I:IU
8U
72
21,;188 t.
-..
2S 852 L
-- ;
96.37 ` �3.?Ei 71:13 $9 U5
--
49:05 64 38 (�B :lU 07: 49
102 12fs.12
108 50
]29 18
153 $(7
124 ,38
150.4f�
1 ?9:29
y 25
14 r
�Iq2,2�1 71
5 7
160:15 '
_..:,
193 5 '
2if):4G
3$
x4;(10
8E~...._.
30.788I
G1:17 76 :1�
S!Lt gaUSnttiYtt} Sce e+5pccific; +lions 1 "able
f)cuther 311, .'.110 t
BOTTOM OF TRENCH
SANITARY MANHOLE R -1642
NOT -TO -SCALE
10
4
D.
D
i
\\ XX
D D
D D
a
D
D.
D oo,0/
2500 psi CONCRETE
PERSPECTIVE VIEW - EARTH CUT AWAY
\\ TO BE USED WHEN CLEAR DISTANCE BETWEEN PIPES
® IS 18" OR LESS, OR WERE NOTED ON THE DRAWINGS.
CONCRETE CRADLE
NOT -TO -SCALE
FINISH GRADE
C.I. MANHOLE FRAME & GRATE
SET ON KENT SEAL OR EQUAL.
MANHOLES SHALL BE AIR TESTED IN ACCORDANCE
WITH ASTM C1244 -93, STANDARD TEST METHOD
FOR CONCRETE SEWER MANHOLES BY THE NEGATIVE
AIR PRESSURE (VACUUM) TEST.
USE KENT SEAL OR EQUAL
BETWEEN RISER RINGS (TYP.)
TADJUST TO GRADE w/ FILLER RINGS
S REQUIRED (4" MIN. /12" MAX.)
PRECAST REINFORCED CONCRETE
MANHOLE CONE MEETING
A.S.T.M. STANDARD C -478.
6
° MANHOLE SECTION JOINTS SHALL CONFIRM
TO A.S.T.M. C -443 w/ 0 -RINGS GASKET
BETWEEN SECTION, PLUS 1/2" EXTRUDABLE
GASKET (KENT SEAL OR EQUAL)
4' -0" DIA. PRECAST
REINFORCED MANHOLE
SECTIONS MEETING A.S.T.M.
STANDARD C -478.
PIPE TO MANHOLE GASKET
MEETING A.S.T.M. STND. C -443
SHALL BE CAST INTO MANHOLE
SECTION AT THE TIME OF
MANUFACTORING, GASKET SHALL
BE DESIGNED TO WITHSTAND UP
TO 30" OF WATER PRESSURE.
T. A �F
4-
4. 4 . 4 a
d.
4 \ d 4
o 4
4 .
BREAK OUT TOP HALF OF PIPE AFTER
PLACING CONCRETE BENCH WALL.
TOP OF BENCHWALL SHALL BE AT MIN.,
ELEV. EQUAL TO TE CROWN OF THE PIPE.
uCONCRETE BENCH WALL (CLASS B)
1BASE SHALL BE POURED IN PLACE
OR PRECAST BOTH SHALL HAVE
#4 BARS AT 12" O.C. EACH WAY
GRANULAR LEVELING MATERIAL ( #2 STONE)
REQUIRED W /PRECAST BASE 6" MIN.
PRECAST REINFORCED CONCRETE
MANHOLE FOR SANITARY SEWER
NOT -TO -SCALE
NOTE:
ALL BEDDING & INTAIL BACKFILL
SHALL BE INSTALLED IN 6"
To 12" BALANCED LIFTS
DX2 (MAX)
TRENCH WIDTH
6" PIPE
SANITARY SEWER
SERVICE CONNECTION
NOT -TO -SCALE
#8 CRUSHED STONE
HAND TAMPED OR WALKED
IN TO 12" ABOVE PIPE.
AND 8" BELOW PIPE
UNDISTURBED EARTH
MIN. WIDTH L25 (O.D.) -12"
#8 CRUSHED STONE
BELL HOE EXCAVATED.
BEDDING DETAIL
NOT -TO -SCALE
A MAGNETIC TAPE LOCATOR SHALL BE
PLACED 6" OVER ALL MAINS & LATERALS
STTOEPpF�
.� Jam. :�GISTER�'-- •• :F.p
No. s
19358
-o `: STATE OF
INDIAN...
%NAL;;�N�,
BACKFILL WITH CLEAN
GRANULAR MATERIAL
PER REQUIREMENT OF
INDIANA DEPARTMENT OF
HIGHWAYS (MECHANICAL
COMPACTED TO 95%
PROCTOR DENSITY).
MIN
NOT -TO -SCALE
SANITARY SEWER SERVICE CONNECTION
NOT -TO -SCALE
APPROVED SURFACE
MARKER
MIN. SLOPE
SHALL BE
MAIN SEWER
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SHEET NO.
35
OF 37 SHEETS
roe No• 42611
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