The FH (fire hazard sign) is a fire and safety signage that indicates flammable materials. So substances liable to self ignite when exposed to water or air.
Occupational hazards that include the presence of a flame. This increases the likelihood of an uncontrollable fire, or increase the intensity of a fire if one does occur. So Flames are a threat, if there are sparks, Chemical accelerants, which can hasten the spread of a fire.
FH (fire hazard sign) sign is required to be installed on commercial, retail and residential developments in accordance. Because this statutory signage indicates fire safety rules for both retail and residential developments and in accordance with the Building Code of Australia (BCA).