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INLET
3
PLAN
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OUTLET
FLARED -END SECTION DIMENSIONS
DIA
WALL
A
B
C
D
E
F
T
12
2
4
24
49
73
24
2 2:1
2
15
2 1 4
6
27
46
73
32
2 2:1
2 1 4
18
2 1 2
9
27
46
73
36
2 2:1
2 1 2
24
3
10
44
30
74
48
2 4:1
3
30
3 1 2
12
54
20
74
60
2 4:1
3 1 2
36
4
15
63
35
98
72
2 4:1
4
42
4 1 2
22
63
35
98
78
3:1
3 3 4
48
5
25
72
26
98
84
3:1
4 1 4
54
5 1 2
28
66
34
100
90
2 4:1
4 1 2
60
6
31
60
39
99
1 96
1 2:1
1 4 3 4
PRECAST FLARED -END SECTION DETAIL
HP STORM TRENCH INSTALLATION DETAIL
i-
MIN. COVER TO
RIGID PAVEMENT, H
I
SPRINGLINE
J
4" FOR 12"-24" PIPE
6" FOR 30,_60" PIPE
I MIN TRENCH WIDTH
(SEE TABLE) yyy111
-f
MIN. COVER TO
\ FLEXIBLE PAVEMENT, H
FINAL
BACKFILL
INITIAL
BACKFILL
HAUNCH
BEDDING
SUITABLE
FOUNDATION
TABLE 3. MAXIMUM COVER FOR ADS HP STORM PIPE. ft
CLASS
CLASS II
CLASS III
CLASS
IV
PIPE DIA
COMPACTED
95%
90%
85%
95%
90%
95%
12"
39
27
20
9
21
12
11
(300mm)
(11.9m)
(8.2m)
(6.1 m)
(2.7m)
(6.4m)
(3.7m)
(3.4m)
15"
42
29
21
10
22
12
11
(375mm)
(12.8m)
(8.8m)
(6.4m)
(3.0m)
(6.7m)
(3.7m)
(3.4m)
18"
36
25
18
9
19
12
11
(450mm)
(11.0m)
(7.6m)
(5.5m)
(2.7m)
(5.8m)
(3.7m)
(3.4m)
24"
31
22
16
7
16
11
10
(600mm)
(9.4m)
(6.7m)
(4.9m)
(2.1m)
(4.9m)
(3.4m)
(3.0m)
30"
33
23
17
9
17
11
10
(750mm)
(10.1m)
(7.0m)
(5.2m)
(2.7m)
(5.2m)
(3.4m)
(3.0m)
36"
32
22
16
7
16
11
10
(900mm)
(9.8m)
(6.7m)
(4.9m)
(2.1 m)
(4.9m)
(3.4m)
(3.0m)
42"
32
22
15
7
16
11
10
(1050mm)
(9.8m)
(6.7m)
(4.6m)
(2.1m)
(4.9m)
(3.4m)
(3.0m)
48"
31
21
15
6
15
10
9
(1200mm)
(9.4m)
(6.4m)
(4.6m)
(1.8m)
(4.6m)
(3.0m)
(2.7m)
60"
34
23
16
6
16
11
10
(1500mm)
(10.4m)
(7Am)
(4.9m)
(1.8m)
(4.9m)
(3.4m)
(3Am)
FILL HIEIUH I IACLE UENEKAI EU UJINU AAtiH I U Jtl; I IUN 12, LUAU
RESISTANCE FACTOR DESIGN (LRFD) PROCEDURE WITH THE FOLLOWING
ASSUMPTIONS:
NO HYDROSTATIC PRESSURE
UNIT WEIGHT OF SOIL (ys) = 120 PCF
NOTES
NOT TO SCALE
1. ALL PIPE SYSTEMS SHALL BE INSTALLED IN ACCORDANCE WITH ASTM D2321, "STANDARD PRACTICE FOR UNDERGROUND
INSTALLATION OF THERMOPLASTIC PIPE FOR SEWERS AND OTHER GRAVITY FLOW APPLICATIONS", LATEST ADDITION,
WITH THE EXCEPTION THAT THE INITIAL BACKFILL MAY EXTEND TO THE CROWN OF THE PIPE. SOIL CLASSIFICATIONS
ARE PER THE LATEST VERSION OF ASTM D2321. CLASS IVB MATERIALS (MH, CH) AS DEFINED IN PREVIOUS VERSIONS OF
ASTM D2321 ARE NOT APPROPRIATE BACKFILL MATERIALS.
2. MEASURES SHOULD BE TAKEN TO PREVENT MIGRATION OF NATIVE FINES INTO BACKFILL MATERIAL, WHEN REQUIRED.
3. FOUNDATION: WHERE THE TRENCH BOTTOM IS UNSTABLE, THE CONTRACTOR SHALL EXCAVATE TO DEPTH REQUIRED
BY THE ENGINEER AND REPLACE WITH SUITABLE MATERIAL AS SPECIFI ED BY THE ENGI NEER. AS AN ALTERNATIVE AND
AT THE DISCRETION OF THE DESIGN ENGINEER. THE TRENCH BOTTOM MAY BE STABILIZED USING A GEOTEXTILE MATERIAL
4, BEDDING: SUITABLE MATERIAL SHALL BE CLASS 1, II III OR IV THE CONTRACTOR SHALL PROVIDE DOCUMENTATION FOR
MATERIAL SPECIFICATION TO ENGINEER. COMPACTION SHALL BE SPECIFIED BY THE ENGINEER IN ACCORDANCE WITH
TABLE 3 FOR THE APPLICABLE FILL HEIGHTS LISTED. UNLESS OTHERWISE NOTED BY THE ENGINEER, MINIMUM BEDDING
THICKNESS SHALL BE 4" (100mm) FOR 12"-24" (300mm-600mm) DIAMETER PIPE; 6" (150mm) FOR 30"-60" (750mm-1500mm)
DIAMETER PIPE. THE MIDDLE 1/3 BENEATH THE PIPE INVERT SHALL BE LOOSELY PLACED. PLEASE NOTE, CLASS IV
MATERIAL HAS LIMITED APPLICATION AND CAN BE DIFFICULT TO PLACE AND COMPACT, USE ONLY WITH THE APPROVAL OF
A SOIL EXPERT
5. INITIAL BACKFILL: SUITABLE MATERIAL SHALL BE CLASS I, 11, III, OR IV IN THE PIPE ZONE EXTENDING TO THE CROWN OF THE
PIPE. THE CONTRACTOR SHALL PROVIDE DOCUMENTATION FOR MATERIAL SPECIFICATION TO ENGINEER. MATERIAL SHALL
BE INSTALLED AS REQUIRED IN ASTM D2321, LATEST EDITION. COMPACTION SHALL BE SPECIFIED BY THE ENGINEER IN
ACCORDANCE WITH TABLE 3 FOR THE APPLICABLE FILL HEIGHTS LISTED. PLEASE NOTE, CLASS IV MATERIAL HAS LIMITED
APPLICATION AND CAN BE DIFFICULT TO PLACE AND COMPACT; USE ONLY WITH THE APPROVAL OF A SOIL EXPERT
6. MINIMUM COVER: MINIMUM COVER, H, IN NON -TRAFFIC APPLICATIONS (GRASS OR LANDSCAPE AREAS) IS 12" (300mm) FROM
THE TOP OF PIPE TO GROUND SURFACE. ADDITIONAL COVER MAY BE REQUIRED TO PREVENT FLOTATION. FOR TRAFFIC
APPLICATIONS; CLASS I OR 11 MATERIAL COMPACTED TO 85% SPD AND CLASS III COMPACTED TO 90% SPD IS REQUIRED.
FOR TRAFFIC APPLICATIONS, MINIMUM COVER, H, IS 12" (300mm) UP TO 48" (1200mm) DIAMETER PIPE AND 24" (500mm) OF
COVER FOR 60" (1500mm) DIAMETER PIPE, MEASURED FROM TOP OF PIPE TO BOTTOM OF FLEXIBLE PAVEMENT
OR TO TOP OF RIGID PAVEMENT.
7, FOR ADDITIONAL INFORMATION SEE TECHNICAL NOTE 2.04.
TABLE 2, MINIMUM RECOMMENDED COVER BASED ON
VEHICLE LOADING CONDITIONS
SURFACE LIVE LOADING CONDITION
PIPE DIAM.
H-25
HEAVY CONSTRUCTION
(75T AXLE LADD)
12" - 48"
12"
48"
(300mm - 1200mm)
(305mm)
(1219mm)
60"
24"
60"
(1500mm)
(610mm)
(15241Tm)
HP STORM DRAINAGE PIPE INSTALLATION
TABLE 1, RECOMMENDED MINIMUM TRENCH WIDTHS
PIPE DAM.
MIN. TRENCH
WIDTH
12"
30"
mm
mm
15"
34"
(375mm)
(864mm)
18"
39"
(450mm)
(99 mm)
24"
48"
mm
mm
30"
56"
(750mm)
(1422mm
36"
64"
(900mm)
(626mm
42"
72"
mm
mm
48"
80"
(1200mm)
mm
60"
96"
0 500mm
(2438mm
NOT TO SCALE
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ADEPTUS ARCHITECTURE, INC.
121 MANLY STREET
GREENVILLE, SC 29601
864-242-2514
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Engineer
JDM
Drawn By
CWJ
Date
APRIL 2022
Revisions
A ISSUE FOR PERMIT REVIEW 05.25.22
Project Number
2273.001
Sheet
C402