Figure 1-28. Priming sheet explosive.
Ring Main. The ring main team lays out the detonating cord ring main, a continuous loop of detonating cord.
The loop is laid from the initiating point, past each group of munitions to be destroyed, and back to the initiating
point. This gives the detonation wave two paths to travel, so a break in the loop will not stop the explosion. It
may be necessary to connect several rolls of detonating cord together to complete the ring main. There are four
methods of connecting detonating cord for a ring main.
In the first method, the M1 detonating cord clip, shown in Figure 1-29, is used according to the following steps:
Overlap the newly-cut free ends by 18 inches.
Secure the cords together by bending the tongues of two clips firmly over both strands of cord. The clips
should be six inches apart.
Secure the connection by bending the trough end of the clip back over the tongue. The clips should be six
inches from each of the free ends of the detonating cord.
In the second method, a detonating cord connector, shown in Figure 1-30, is used to join two sections of
In the third method, detonating cord is joined with a square knot, as shown in Figure 1-31. When using the square
knot, at least six inches of cord must be left free on each side of the knot.
The fourth method is to use electrical tape to splice two lengths of detonating cord together, as shown in Figure 1-
32. When splicing two cords together, overlap the two ends by 18 inches, and tape the center for at least six
Branch Lines. Branch line teams lay out detonating cord branch lines from the ring main to the items to be
destroyed. They then tie these items into the ring main. This tying-in is very important-the mission depends on it.
There are three ways to connect branch lines to the ring main.