Figure 11-21.Placememt of mat end ramps.
section. The laying of matting should proceed in one
direction only, from one end of the runway. Laying of
the guide rail, mats, and related components is as
NOTE: The instructions presented here are for a
96-foot runway, but they are also applicable for a
1. Establish the guide rail center line, using a
2. Install the first guide rail with dowel pins facing
aft (opposite the direction of laying the guide rails). The
first guide rail should be 9 feet in length, NAEC (Naval
Air Engineering Center) Part No. 6125354, to prevent
alignment of the guide rail joint with the mat joint.
3. Install the next four guide rails (10-foot rail)
using spacer seals, NAEC Part No. 414233-1, and gap
gauges, NAEC Part No. 414219-1, between the guide
rail joints before driving the dowel pins. Check for
proper position of the pins in the guide rails, using a pin
gauge, NAEC Part No. 414212-1.
NOTE: As the guide rails and mats are being laid,
any visible depressions in the grade should be filled in
and raked with the applicable hand tools.
4. Insert the transit target, NAEC Part No.
414691-1, in the center slot of the guide rail and
preliminary alignment of each rail.
5. Lay the 18-foot section of AM-2 matting, as
shown in figure 11-22. Insert the mat-locking bars
between the guide rail and the mat. (See fig. 11-23.)
6. Insert the transit target, NAEC Part No.
414691-1, in the center slot of the guide rail and make
the final alignment by shifting the five guide rails and
attached mats. The guide rails and mats maybe shifted
by pounding the edge of the guide rail or mat with a
wooden block and a mallet. The guide rail center line
should not vary more than 1/4 inch in 50 feet in the
horizontal direction nor more than 1/8 inch in 12 feet in
the vertical direction as determined by a 12-foot
straightedge. The straightedge should be moved in