the cold-water supply. Electrical work must conform to
the local governing electrical codes.
15. 1a-08. A main SHUTOFF VALVE will be
installed as indicated or specified. The 1-inch main
shutoff valve must be accessible to the stop-and-waste
valve with solder-type ends, and the waste arranged for
complete drainage of the entire water-supply system.
1a-09. WORKMANSHIP will be performed in
a fast-class manner, observing all standards of good
15. 1a-10. TESTS must be conducted on all
plumbing systems to provide tightness of all piping
joints. If leaks occur, they will be repaired immediately
and the tests repeated. The soil, waste, and vent systems
will be completely filled with water to the highest point
before checking for leaks. The hot- and cold-water
piping must be tested with water at 1 1/2 times the
working pressure. After all tests have proved
satisfactory, all the necessary adjustments on the
faucets, traps, valves, and other specialties will be
checked, so the entire system can be placed in normal
15. 1a-11. INSULATION. All the piping and
fittings subjected to freezing temperatures must be
adequately insulated with a suitable frostproof covering
secured in place.
The project guide specifications, then, provide all
the required information on the materials and methods
of work to be used in completing a project that is not
contained in the plans. There may be times when you
will need to know more about the characteristics of
materials listed in the bill of material. For example, if
you cannot obtain a specified type of material or piece
of equipment and want to substitute, you will need to
know the characteristics of each in order to compare
them before making the decision to substitute. This is
where a knowledge of and access to federal, military,
and NAVFAC specifications are important.
FEDERAL specifications are written technical
descriptions of materials and supplies used by the
Navy and other federal government agencies. They
cover in detail the characteristics and compositions of
these items and are listed, along with military
specifications, in numerical and alphabetical indices
generally available to you.
MILITARY specifications are similar to federal
specifications but are developed for use by the
Department of Defense. Formerly called JAN (Joint
Army and Navy) specifications, they have been revised
to MIL-SPECS, using the same serial number as
The last of the specifications that you will most
likely use is the NAVFAC specifications. These are
developed by the Naval Facilities Engineering
Command and cover the Naval Facilities Engineering
Command and other items normally used for
construction. They are listed as "Type Specs" and
Standard Specifications in the Service Contracts
Specifications, NAVFAC MO-327.
Are all specification divisions required for every
You are installing a dental operatory chair on a
project. To what division of the specifications
should you refer?
In the specifications sample Division 15
Mechanical," what paragraph identifies the type
of pipe for aboveground, vertical waterlines?
When is it necessary to know specific
characteristics of a part or material?
ASSIGNMENT AS A CREW LEADER
LEARNING OBJECTIVE: Identify the basic
fundamentals of project planning, organization,
As you gain experience in utilities work, you will
probably be called upon to serve as the leader of one or
more crews. They may perform various types of work,
such as measure, cut, and thread pipe; install pipe
lagging and other insulation and protective materials
on pipe; or other related utilities type work. Your
duties, as a crew leader, may vary from one activity to
another. Usually, these duties involve planning work
assignments, supervising work teams, preparing
requisitions, and keeping time cards.
PLANNING WORK ASSIGNMENTS
Planning is the process of determining
requirements and devising and developing methods
and schemes of action for construction of a project.
Proper planning saves time and money for the Navy
and makes the project easier for everyone concerned.
Here are some pointers that are designed to help you
plan day-to-day work assignments for your crew(s).