Construction joints must be sealed with joint systems, which will impart a fire resistance at least equal to those of the adjacent constructions so that overall fire resistance is not compromised.
Fire resistive joint systems are used in building construction to seal joints, and must be of the same or greater fire resistance (temperature) rating as the wall or floor containing the opening which they are designed to protect. Perimeter joint systems are most often used to seal a clearance separation between curtain walls and floors. They are designed to accommodate various movements induced by thermal differentials, seismicity, and wind loads.
