What type of material is sprayed fiber referred to in fireproofing applications?

Sprayed fiber in fireproofing applications is primarily known as cementitious material. This type of material combines cement with additional fibers that enhance its structural integrity and fire-resistance properties. When sprayed, it creates a protective layer on structural components like steel beams, which helps to insulate them from high temperatures during a fire.

Cementitious materials are used because they not only provide effective fireproofing but also have good adhesion, durability, and can be applied in various thicknesses as needed for different fire rating requirements. The knowledge of materials used in fireproofing is crucial because the choice impacts the overall effectiveness of the protection offered. Other materials like fiberglass, polyurethane foam, or acoustic materials serve different purposes and do not offer the same combination of fire resistance and structural support that cementitious spraying provides.