Use the following procedure for demolition blocks without cap wells:
Make a hole large enough to contain the blasting cap in the end of the demolition block.
Wrap a string several times around the explosive, and tie a secure knot. Place the tie so that it will be at the
top of the hole when the fused blasting cap is inserted.
Insert the fused blasting cap into the hole.
Tie the string around the time fuse at the top of the hole with two half hitches.
The M8 blasting cap holder, shown in Figure 1-27, is used with sheet explosives. The M118 sheet demolition
charge and the M186 roll demolition charge are the only sheet explosives used. The M8 holder is supplied with
each M118 and M186 demolition charge of recent manufacture. It is also available as a separate item of issue in
quantities of 4,000. The procedures for using sheet explosives are as follows:
Attach an M8 blasting cap holder to one end or to one side of the sheet explosive. The M8 blasting cap
holder fastens to the sheet explosive with three slanted protruding teeth that prevent its withdrawal. Two
dimpled spring arms firmly hold the blasting cap in the M8 holder. Insert an electric or a nonelectric blasting
cap into the holder until the end of the cap presses against the sheet explosive.
Cut a notch approximately one and one-half inches long and one-quarter inch wide in the sheet explosive.
Insert the blasting cap to the limit of the notch. Secure the blasting cap with a strip of sheet explosive, as
shown in Figure 1-28.
Place the blasting cap on top of the sheet explosive, and secure it with a strip of sheet explosive measuring at
least three inches by three inches.
Insert the end of the blasting cap one and one-half inches between two sheets of explosive.
Figure 1-27. M8 blasting cap holder.
Both the electric and the nonelectric firing systems use detonating cord to take the explosive shockwave from the
blasting cap to the demolition charges. Detonating cord is used when more than one charge must be detonated
simultaneously. While the priming crew is preparing the blasting caps, other crews should be busy laying out
detonating cord to accomplish the destruction.