Detonating cord acts as an instantaneous fuse to transmit the explosive shockwave from the
blasting cap to the demolition charge. See Figure 40. It is usable underground or underwater.
The initiation of the cord is achieved by an electric or nonelectric blasting cap located above
ground or above water.
Figure 40. Reinforced Pliofilm-wrapped detonating.
Detonating cord is issued in 100-foot and 1,000-foot spools. The 1,000-foot spool is best suited
for long tie-ins and the ring main. The 100-foot spool is best suited for branch lines and other
In addition to general safety requirements, the precautions listed below should be followed when
using detonating cord:
Avoid sharp bends or kinks.
When fastened together, make sure that the angle formed by a branch line and a main line is
at least 90 degrees.
Make sure that there is a clearance of at least 1 foot or the height of a full sandbag between
crossed detonating cord lines. See Figure 41.
Figure 41. Minimum clearance between crossed detonating cord lines.