NOTES ON SCHEDULES
work performed by the Seabees. There are three
types of NAVFAC specifications.
Notes are generally placed a minimum of 3 inches
below the Revision block in the right-hand side of
the first sheet. The purpose of these notes is to give
additional information that clarifies a detail or
explains how a certain phase of construction is to be
performed. You should read all notes, along with the
specifications, while you are planning a project.
LEARNING OBJECTIVE: Upon completing
this section, you should be able to interpret
written construction specifications.
Because many aspects of construction cannot be
shown graphically, even the best prepared
construction drawings often inadequately show some
portions of a project. For example, how can anyone
show on a drawing the quality of workmanship
required for the installation of doors and windows?
Or, who is responsible for supplying the materials?
These are things that can be conveyed only by
hand-lettered notes. The standard procedure is to
supplement construction drawings with detailed
These written instructions,
called specifications (or more commonly specs),
define and limit materials and fabrication to the intent
of the engineer or designer.
Usually, it is the responsibility of the design
engineer to prepare project specifications.
Builder, you will be required to read, interpret, and
use these in your work as a crew leader or supervisor.
You must be familiar with the various types of federal,
military, and nongovernmental reference
specifications used in preparing project specs. When
assisting the engineer in preparing or using
specifications, you also need to be familiar with the
general format and terminology used.
NAVFAC specifications are prepared by the
Naval Facilities Engineering Command (NAVFAC-
ENGCOM), which sets standards for all construction
work performed under its jurisdiction. This includes
NAVFACENGCOM Guide Specifications
NAVFACENGCOM guide specifications (NFGS)
are the primary basis for preparing specifications for
construction projects. These specifications define
and establish minimum criteria for construction,
materials, and workmanship and must be used as
guidance in the preparation of project specifications.
Each of these guide specifications (of which there are
more than 300) has been written to encompass a wide
variety of different materials, construction methods,
and circumstances. They must also be tailored to suit
the work actually required by the specific project.
To better explain this, lets look at figure 2-19,
which is a page taken from a NAVFACENGCOM
guide specification. In this figure, you can see that
there are two paragraphs numbered 3.2.1. This
indicates that the spec writer must choose the
paragraph that best suits the particular project for
which he is writing the specification. The capital
letters I and J in the right-hand margin next to those
paragraphs refer to footnotes (contained elsewhere in
the same guide specification) that the spec writer must
follow when selecting the best paragraph.
Additionally, you can see that some of the information
in figure 2-19 is enclosed in brackets (). This
indicates other choices that the spec writer must
make. Guide specifications should be modified and
edited to reflect the latest proven technology,
materials, and methods.
EFD Regional Guide Specifications
Engineering Field Division regional guide
specifications are used in the same way as the
NAVFACENGCOM guide specifications but only in
areas under the jurisdiction of an EFD of the Naval
Facilities Engineering Field Command. When the
spec writer is given a choice between using an EFD
regional guide specification or a NAVFACENGCOM
guide specification with the same identification
number, the writer must use the one that has the most
recent date. This is because there can only be one
valid guide specification for a particular area at any