Class A fire
Class A fire means a fire involving ordinary combustible materials such as paper, wood, cloth, and some rubber and plastic materials.
Source
29 CFR § 1910.155
Scoping language
Scope. This subpart contains requirements for fire brigades, and all portable and fixed fire suppression equipment, fire detection systems, and fire or employee alarm systems installed to meet the fire protection requirements of 29 CFR part 1910.