Fuel agglomeration is the accumulation of fuels in proximity to each other that increase the fire hazard. Ignition of one object can easily spread to the nearby fuels, dramatically increasing the fire intensity and exposures presented to other nearby combustibles. Agglomeration can occur unintentionally, such as when multiple combustibles are moved to the edge of parcels to maintain sufficient distance to a primary structure. Other examples include situations where:
This issue is magnified on smaller, denser properties as illustrated in figures below.
fences are installed parallel to each other
– Parallel fences burn with higher intensity thus increasing fire hazard
The combustible sheds and gazebo on two adjacent parcels, shown below, are spaced appropriately from the residences and other fuels, except fences, on their respective lots. However, Shed A-1 is too close to Residence B, and both sheds and the fences act as an agglomerated fuel package along the property border. If ignited, the sheds and fences will substantially increase the exposures from the red highlighted area, igniting the structures.
Increased spacing between combustibles lowers fire intensity which:
lowers the threat to homes and property
improves conditions for evacuations
helps first responders with rescues and suppression