TABLE OF CONTENTS Fireproofing, in many cases, might better be referred to as fire resistance because the materials applied, mainly to structural steel systems, are meant to protect these systems from collapsing when exposed to the presence of fire for specific periods of time (one, two, three, or four hours). In other cases, the term fire retardant is more applicable, particularly when applied to flammable or combustible materials, like wood. In this case, fire retardancy provides a limit to the flame spread, fuel contribution, and smoke development that would have occurred if the combustible surface had not been treated with a fire-resistive coating.
Spray or trowel on materials of a cementitious or mineral-fiber nature.
Concrete encase structural steel columns or beams, or increase the thickness of concretesuspended slabs on metal deck.
Apply specific numbers of layers of gypsum drywall onto the structural steel members.
Spray, brush, or roll on a water- or solvent-based intumescent material or mastic.
Spray- or trowel-on dry or wet cementitious or mineral-fiber materials are the most prevalent forms of structural-steel fireproofing and are generally divided into two groupings (Type I and Type II).
Type I A factory-mixed cementitious materials with a minimum density of 15/14 pounds per cubic foot (240 kg/cubic meter).
Type II A factory-mixed, asbestos-free, mineral-fiber material with inorganic binders, having a minimum applied dry density of 15 pounds...
