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Section of Runway Replacement | Up
Steelworker Volume 02 - Building manual for how to work with steel | Next
Edge Repairs |
Figure 11-36.—Removal of locking bar.
6. With the clearance now provided, removal of
the remainder of the matting and additional guide rail,
as necessary to affect the repair, may be readily
accomplished Remove the cut piece of guide rail aft of
the repair area by removing locking bars and
disconnecting the guide rail pins, using a pin remover,
NAEC Part No. 414223-1. Slide the guide rail out of the
mats.
7. Repair the ground surface, as necessary, before
installing the guide rail and new or refurbished matting.
8. The installation procedure must be the same as
that for the original installation. Replace the locking
bars.
9. Reinstall matting over the repair area until the
last row of matting is in place. At this point, this row of
matting must be raised in unison with pry bars to permit
installation of locking bars.
NOTE: It will not be possible to insert locking
bars between the guide rail and adjacent mats for this
row. Therefore, a replacement mat should be installed
next to the guide rail. A locking bar is built into the
replacement mat.
10. Insert the typical keylocks in the reverse order
in which they were taken out. Always use wood
blocking between the hammer and connector if force is
necessary to drive the sections into place.
Excessive mat deflection and roughness, which
can be attributed to cavities under
repaired in the following manner:
the mats, can be
1. Remove all mats that show excessive wear and
deformation according to the instructions given earlier.
2. Fill all cavities under the mats and cover cavity
areas with old matting. Areas should be reinforced with
any available matting: M9M1, M9M2, AM-1, or
damaged AM-2 mats. The mats in the bottom layer need
not be joined together to save material and manpower.
It is advisable to have the reinforcing mats touching, but
it is not imperative that the mats in the bottom layer be
interlocked. The mats in the bottom layer must be
placed with the long dimension of the mats at right
angles to the mats in the top layer. A double layer of
matting should be considered in all cases where sandy
areas can cause excessive mat roughness due to
movement of the sand
3. Replace the top layer of matting according to the
instructions given earlier.
Before proceeding, note that a heavy-duty mat, as
shown in figure 11-37, has been developed
Figure 11-37.—Heavy-duty mat.
11-25
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