UFC 4-171-05
1 January 2005
with change 25 October 2006
Temporary seeding and mulching of exposed areas may be required in addition to
installation of specific facilities such as silt fences, sedimentation ponds, filtration beds,
and riprap or slope protection. Suppression of fugitive dust from earthwork operations
should also be required.
3-2.1.4
Structural Features
3-2.1.4.1 Structural features for drainage facilities will generally be constructed of
reinforced concrete, and are typically available from precast concrete suppliers local to
the project area. Grates and manhole covers and frames and other appurtenances will
be either a durable iron casting or galvanized steel construction according to materials
and items locally available. Some sites may be located in areas where the soil and
water are corrosive to concrete and metal. In this case, polyethylene or other synthetic
pipe and drainage structure materials may be desirable for use.
3-2.1.4.2 Incorporation of state Department of Transportation (DOT) or Government
installation public works drainage structure details is advisable, since these are
generally familiar to contractors, municipalities, and roadway agencies near the site.
3-2.1.4.3 Structural features will be able to withstand applied vehicle loadings in their
particular Government installations.
3-2.2
Utilities
3-2.2.1
Sanitary Sewer
3-2.2.1.1 Sanitary sewers include the service pipe and structures from the building(s) to
the available utility stub or connection point. The preferred pipe material for on-site
sanitary sewer is PVC pipe. If extremely deep burial or heavy loads are encountered,
the pipe may be installed in a steel casing or the pipe type changed to cement-lined
ductile iron pipe. Sanitary sewer crossings of critical internal roadways, which should
not be disturbed or open cut in the future, should be crossed using a steel casing
around the sanitary sewer pipe. The pipe section and bedding should be designed to
withstand the applied loads at its location.
3-2.2.1.2 Sanitary sewer manholes will be constructed of precast concrete with cast
iron covers and frames. Clean-outs will be located at bends or changes in grade on any
service line. The junction of one or more service lines and the resulting downstream
sewer lateral should require a manhole.
3-2.2.1.3 Verify the capacity requirements for conveyance and treatment for the
sanitary sewer utility system to which the project is connected. In general, private or
municipal utility systems will represent that the downstream pipes and sewers are in
serviceable condition to meet the needs of the project; the utility company maintenance
and replacement program is traditionally funded by Tenant connection charges and use
fees to pay for maintenance and upgrading.
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