UFC 4-150-02
12 May 2003
Table 3-6
Special Pier Structures and Appurtenances
STRUCTURE OR
WHERE
APPURTENANCE
TO USE
DETAILS
REQUIREMENTS
In-line Cleanout
Note 1
See Figure 3-12
Regular Manhole
Note 2
Refer to NFGS-02530,
Note 3
"Sanitary Sewerage"
Drop Manhole
Note 4
Refer to NFGS-02530
Note 5
Siphons
Note 6
Note 7
Note 8
Intercepting Sewers
Note 9
Note 10
Traps and Interceptors
Note 11
Note 12
Terminal Cleanout
Note 13
See Figure 3-12
Note 14
Receiving Hose
See Figures 3-14 & 3-15
Note 15
Connections
Sewer Pipe Supports
Note 16
See Figures 3-11 & 3-13
NOTES TO TABLE 3-6
1.
Use in-line cleanout at junctions and changes of direction and when required according to
spacing shown in details under regular manhole below.
2.
Use regular manhole: terminally on all lines; at all junctions and changes of direction; at changes
in invert elevation or slope. Otherwise, according to spacing shown below:
Pipe Size
Maximum Spacing
Inches (mm)
Feet (m)
18 (450) or less
400 (120)
18-48 (450-1200)
500 (150)
48 (1200) and greater
600 (180)
3.
Requirements for regular manholes: lower invert through manhole a distance equal to expected
loss of head in manhole, plus 0.8 times any change in sewer size. For junction manholes, check
which upstream invert is critical in determining outlet invert. Raise top of manhole above possible
flooding level.
4.
Use drop manhole when difference between inlet and outlet inverts exceed 0.6 m (2 ft).
5.
Requirements for drop manholes: for difference less than0.6 m (2 ft), increase upstream sewer
slope to eliminate drop.
3-48
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