Figure 2-18. Inhabited-building distance (IBD).
Figure 2-19. Magazine distance.
This term refers only to those parts of streams, channels, or canals that are capable of being used in
their ordinary or maintained condition as highways of commerce over which trade and travel are
This is any steam, diesel, electric, or other railroad that carries passengers for hire.
This is the minimum distance permitted between explosive locations as prescribed for various types
and quantities of explosives. This distance should prevent propagation by blast.