Figure 11-22. - AM-2 mat installation sequence (with guide rails - 96-foot-wide runway).

7. Begin laying the 78-foot side of matting for the length of the guide rail and matting as aligned in step 6. Transverse mat joints should not vary more than 3 inches between the 18-foot and 78-foot-wide section of the runway where joints meet the guide rail and the mat. Installation of the 78-foot side may lag behind the guide rail and the 18-foot side but should never be installed beside the guide rails that have not yet been aligned according to step 6.

8. Install the next five guide rails. Guide rail joints should never be closer than 3 inches in reference to the transverse mat joints. (See fig. 11-23.) To ensure the 3-inch distance between the mat and guide rail joints, substitute a 9-foot length of guide rail for a 10-foot guide rail. Lay matting on the 18-foot side and then the 78-feet side. (See steps 5,6, and 7.) Continue installing the runway until 100 feet of the matting has been laid.

NOTE: A minimum of ten gap gauges should remain installed to the rear of the guide rail dowel pins being installed.

9. Every 100 feet, install typical keylocks across the runway. Typical keylocks cannot be secured to the guide rail. Cut keylocks in 6-foot sections, as necessary, to ease installation on the 18-foot and the 78-foot sides of the guide rail. Refer to the section discussed previous] yin this chapter on "Mat-Laying Procedures