TM 5-623
CHAPTER 2
PAVEMENT NETWORK IDENTIFICATION
slab would be counted as two slabs for the purpose of
2-1. Introduction
pavement inspection.
Before PAVER can be used, the installation pavements
must be divided into components. This chapter defines
2-3. Guidelines for pavement identification
the process. The guidelines for division of airfield
a. Dividing the pavement network into branches.
pavements are given in AFR 935.
The first step in using PAVER is to identify the pavement
branches. The easiest way to identify these branches is
2-2. Definitions
to use the installation's existing name identification
a. Pavement network. An installation's pavement
system.
network consists of all surfaced areas which provide
accessways for ground or air traffic, including roadways,
(1) For example, Marshall Street in figure 2-1
parking areas, hardstands, storage areas, and airfield
would be identified as a branch. Areas such as parking
pavements.
lots and storage areas that do not have names already
b. Branch. A branch is any identifiable part of the
assigned can be given descriptive names which
pavement network which is a single entity and has a
associate them with their area.
distinct function. For example, individual streets, parking
(2) In addition to descriptive names, branches
areas, and hardstands are separate branches of a
are assigned a unique code to help store and retrieve
pavement network. Similarly, airfield pavements such as
data from the PAVER files.
This code has five
runways, taxiways, and aprons are separate branches.
characters which are numbers of letters given to the
c. Section. A section is a division of a branch; it
branches using any logical order. The first letter of the
has certain consistent characteristics throughout its area
code will identify the type of branch as shown in table 2-
or length. These characteristics are:
1. For example, the parking lot 321 shown in figure 2-1
is given the code P0321. The code P0321 is derived
(1)
Structural
(thickness
and
from P representing parking lots and 0321 representing
materials).
the nearest building to the parking area. Since the
(2)
Construction history.
building number has less than four digits, a zero is used
(3)
Traffic.
on the left to provide the required characters.
(4)
Pavement condition.
b. Dividing branches into sections.
d. Sample unit. A sample unit is any identifiable
(1) Since branches are large units of the
area of the pavement section; it is the smallest
pavement network, they rarely have consistent or
component of the pavement network. Each pavement
uniform characteristics along their entire length. Thus,
section is divided into sample units for the purpose of
for the purpose of pavement management, each branch
pavement inspection. (See AFR 93-5 for size of sample
must be subdivided into sections with consistent
units for airfield pavements.)
characteristics. As defined in paragraph 2-2c, a section
must have uniform structural composition, traffic, and the
(1) For asphalt or tar-surfaced pavements
same construction history.
(including asphalt overlay of concrete), a sample unit is
(2) After each section is initially inspected,
defined as an area of approximately 2500 square feet
pavement condition within the section can be used to
(plus or minus 1000 square feet).
subdivide it into other sections if a considerable variation
(2) For concrete pavements with joint spacing
in condition is encountered. For example, a section
less than or equal to 30 feet, the sample unit is an area
containing part of a two-lane road that has one lane in a
of 20 slabs (plus or minus 8 slabs).
significantly different condition than the other lane should
(3) For slabs with joint spacing more than 30
be subdivided into two sections. Unique situations such
feet, imaginary joints should be assumed.
These
as those that
imaginary joints should be less than 30 feet apart. This
is done for the purpose of defining the sample unit. For
example, if slabs have a joint spacing of 50 feet,
imaginary joints may be assumed at 25 feet. Thus, each
2-1
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