MIL-HDBK-1005/16
Table 7 (Continued)
Special Pier Structures and Appurtenances
Structure or
Appurtenance
Where to Use
Details
Requirements
Use WEF MOP FD-5
Siphons
For carrying sewers
Maintain
for hydraulic
under obstructions
velocity
design.
or waterways.
of 3 fps
(0.9 m/s). Use
no less than
two barrels
with min. pipe
size of 6 in.
(150 mm).
Provide for
convenient
flushing and
maintenance.
Where discharge of
Take special
Inter-
existing sewers must
care against
cepting
be brought to a new
infiltration due
sewers
concentration point.
to depth or
proximity of
surface water.
Displacement
On all outlets from
Traps and
velocity
subsistence
inter-
0.05 fps
buildings, garages,
ceptors
(0.015 m/s).
mechanical shop,
Grease
wash pits, and other
removal: in
points where grease
absence of
or oil can enter
other data use
system.
300 to 400
mg/L. Provide
for storage of
1 week's
grease
production
(1 day if
continuous
removal is
provided).
Length = twice
depth.
55
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