12 May 2003
Including change 1, 19 January 2007
(50 ft) from corresponding ships connections when other ship types occupy their
UTILITY CONNECTION GROUP DESIGN
Configurations To Avoid Interference. Utility outlet groups should be
designed for minimum interference of hoses and cables with each other, with deck
equipment, and with deck operations. Check weights of hose lengths and cables with
crane's lifting capability. Outlet groups may be placed above deck or in deck pits. They
may also be placed in open galleries below the main deck where the pier has sufficient
elevation to avoid submergence of the utility connections. An example is a double-deck
pier system such as Pier 6 at Naval Station Norfolk as shown in Figure 2-2. In order to
avoid hose-connection difficulties and interferences with pier traffic, outlet connections
should have centerlines parallel with berths or at not more than a 30-degree angle. The
distance of connections from the pier face should be as short as is consistent with
structural restraints and with convenience. However, on some aircraft carrier berths
such as those using narrow breasting camels, locate the utilities to clear ship elevators.
The type of connector at outlets must be compatible with hoses in use, or intended for
use, at a given site. It is noted that the profile presented by utility groups above deck is
dependent upon the height of the pier and the type of ship at berth. This is an important
consideration in the design of dockside utilities for ship service. Mooring lines for ships
such as destroyers are relatively low and present a greater hazard to utility connections.
Low-profile utility outlet arrangements are usually preferred. Whenever possible,
mooring line patterns for the specific ships to be berthed should be observed at a similar
berth before utility group design is commenced. The berthing plans are to include
mooring line patterns and must uncover conflicts with utility outlets. Some typical
above-deck utility connection details are shown in figures in subsequent chapters.
Other arrangements are also possible and may be acceptable. A specific arrangement
may be required by the cognizant NAVFAC EFD/EFA or USACE DISTRICT to match
existing outlet designs. Required hose or cable connection types and sizes are given in
individual utility descriptions in the following chapters. Provide for future expansion of
utilities by the appropriate sizing of valve pits, pipe trenches, electrical vaults, and
electrical duct banks. Likewise, a specific project may require the immediate design for
future utility services. Lastly, always design for proper and safe access and
maintenance of all utility systems.
Design for Nesting of Ships. Where berthing plans include the nesting
of ships, provide a sufficient quantity of adequately sized services and connections.
Design according to the number of ships that may simultaneously use each such berth.
Unless instructed otherwise, provide internal shipboard port-to-starboard utility headers
for all utilities except for potable water. For potable water, use dual connections with
individual backflow devices to provide separately protected supplies to two ships at
each group location.