Table2: Residential Neighborhood Fire Hazard Data Dictionary

	Fuel Characteristics	Measurement	Low	Moderate	High	Extreme
Structural Fuels:	Combustible roof materials	% structures with wood roofs	None	less than 20%	20-50%	more than 50%
	Siding, decking and fencing	%Structures with combustible siding, decking or fencing	None visible	less than 20%	20-50%	more than 50%
Vegetation Fuels:	Surface Fuel Density	%Surface area supporting combusitible surface fuels	less than 20%	20-50%	50-70%	larger than 70%
	Aerial Fuel Density	%Surface area covered by tree canopy	0- 10%	10-30%	30-70%	larger than 70%
	Vertical Continuity	Presence of ladder fuels and crown fires potential	None	Isolated ladder fuels, Individual trees to crown	Widespread ladder fuels, Stand-wide crown fire expected
	Tree Height	Tree height	Short = shorter than 50 ft	Intermediate = 50- 90 ft	Tall = taller than 90 ft
	Flammability	Overall flammability of fuels	Irrigated grass, Ornamental hardwoods	Cured grasses, Native hardwoods, Cultivated landscapes	Pyrophytes (Juniper, pine, eucalyptus, etc.)
	Fuel Clearance	Clearance distance of combustible material from structure	Poor = less than 10ft	Moderate = 10-30ft	Good = 30-100ft	Excellent = larger than 10ft
Risk Value Assignment			1	2	3	4

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