Definition

1. Adjective:
   • Difficult to burn; having properties that resist or slow the spread of fire: Describes materials, structures, or assemblies that are designed or treated to withstand fire, preventing or retarding its ignition and spread for a specified period.

Usage

• The term is used attributively (before a noun) to describe the fire-resistant quality of a material or component.
• It is a technical term commonly found in building codes, construction, engineering, and safety regulations.

Examples

• Adjective:
  • The building code requires fire-resistive walls between apartment units.
  • They installed fire-resistive doors to compartmentalize the hallway.
  • A fire-resistive coating was applied to the steel beams to protect them from high temperatures.

Advanced Usage

• "Fire-resistive construction": A specific classification of building construction where the structural elements (walls, floors, columns) are made of non-combustible materials with a specified fire-resistance rating.
  • The high-rise was built using fire-resistive construction to enhance occupant safety.
• "Fire-resistive rating": A measure, usually in hours, of a material's or assembly's ability to withstand fire exposure while maintaining its structural integrity.
  • This wall assembly has a 2-hour fire-resistive rating.

Variants and Related Words

• Fire-resistant (adj.): Often used interchangeably with "fire-resistive," though sometimes "fire-resistive" implies a performance standard met through testing. (e.g., )
• Fire-retardant (adj.): Specifically describes a substance applied to materials to make them less flammable and slow burning. (e.g., )
• Fireproof (adj.): Implies complete immunity to fire; technically, very few materials are truly fireproof. It is a stronger, sometimes absolute, claim than "fire-resistive."

Synonyms

• Flame-retardant: Resisting combustion.
• Non-combustible: Incapable of igniting and burning.
• Incombustible: Not easily set on fire.

Related Phrases

• Fire-resistive assembly: A constructed component (e.g., a wall, floor, or door) that has been tested and rated for its fire resistance.
  • The stairwell is protected by a certified fire-resistive assembly.

Adjective

1. difficult to burn