FIRE AND HEAT PROTECTION WRAP FOR STRUCTURAL STEEL COLUMNS, BEAMS AND OPEN WEB JOISTS

摘要

A fire and heat protection wrapping system (10) is described for wrapping structural steel such as steel columns (14), beams and open web joists used in steel construction of all types of edifices. The protection wrapping system includes a concentric composite laminate structure (20) having a plurality of concentric layers (22, 32, 42, 52) for the protection of structural steel components which are exposed to high temperatures of up to five hours in duration. The plurality of concentric layers includes an outer first layer (22), an inner second layer (32), an inner third layer and an inner core fourth layer (52) for wrapping the structural steel component. The outer first layer is a fiberglass textile having an intumescent coating resistant to heat, water and impact. The inner second layer is a metal foil layer. The inner third layer(42) is a low conductivity refractory blanket. The inner core fourth layer is a metal foil layer.