An edge of slab/curtain wall joint requires which type of system?

For an edge of slab/curtain wall joint, a perimeter fire barrier system is essential due to its functional role in ensuring fire containment between different building elements. This system is designed to prevent the passage of fire and smoke through the joint, maintaining the integrity of the fire-resistive construction of the wall and floor assemblies. It is specifically engineered to address the unique challenges faced at the intersection of different building components, which might otherwise allow for fire spread.

Unlike a simple sealant, which may only provide a basic barrier against air or moisture but does not offer the necessary fire-resistance properties, a perimeter fire barrier system incorporates materials and design features that meet rigorous fire safety standards. Additionally, compressible backing materials can be components used alongside fire barrier systems, but they do not, by themselves, provide the required level of fire protection.

Fire-resistant paint, while useful in certain applications to enhance fire resistance, does not provide the structural integrity needed at joints, especially in scenarios where thermal expansion and contraction may occur. Therefore, a perimeter fire barrier system is the most suitable and effective solution for ensuring fire safety at an edge of slab/curtain wall joint.