Figure 11-15.Insertion of the locking bar.
Figure 11-16.Placing of third mat (full-length).
preceding row while being held at an angle (fig. 11-12).
The mat must then be aligned so when it is rotated
downward, the end connectors mate properly, as shown
in figure 11-13.
NOTE: The mats are designed with an apparent
loose fit. This is to allow for expansion and also to
allow for the natural waviness inherent in the extruded
mat sections. Because of this, it is possible to have a
row of mats installed but misaligned so as to prevent
the proper engagement of one or more of the mats in
the following row. (Such a condition in exaggerated
form, and the method of corrections, is shown is figure
11-17.) Locking bars may be used as temporary
spacers between the rows to prevent this. Place a
locking bar on edge where the ends of two mats join
and as the row ends. After three or four rows have been
laid using locking spacers, proceed with the remainder
of the runway or taxiway by removing the spacers
from the furthest row and using them in the row just
If it becomes necessary to
with a sledge, always place a