10. INSPECTION GUIDELINES FOR FIRE RESISTIVE JOINTS
When a fire rated wall / floor assembly intersects another wall / floor assembly an opening or joint exists that needs to be properly sealed in accordance with a fire resistive joint system. The fire resistive joints occur at the top-of-wall( head-of-wall), bottom-of-wall, floor-to-wall, wall-to-wall, and floor-tofloor conditions.
Fire resistive joint systems are design to prevent the spread of fire through a linear opening between the two fire resistance rating wall / floor assemblies. In addition, most joint systems also accommodate movement, compression and / or extension, of the joint.
For fire resistive joint systems, some of the commonly used firestopping materials include:
• Preformed firestop products such as a firestop top track seal( Hilti CFS-TTS), firestop bottom track seal( Hilti CFS-BTS).
• Flexible, silicone based firestop sealants( Hilti CP606)
• Water-based firestop sprays( Hilti CFS-SP WB)
10.1 Steps for inspection
CHECK POINTS FOR JOINTS
1) Is the hourly fire rating of the referenced fire resistive joint system or EJ greater than or equal to the fire rating of the floor / wall assembly?
2) Does the floor and / or wall construction match the floor / wall assembly listed in the firestop system or EJ?
3) Is the fire resistive joint system tested for the amount of movement required for the assembly? Does it match the required class and type of movement?
4) Does the field installation comply with the following requirements of the referenced fire resistive joint system or EJ?
a) Maximum width of the joint
b) Proper backing material( when required), including proper orientation and compression of backing material
c) Proper firestopping product, including type, amount, thickness, orientation, etc.
d) Proper accessories installed, including anchor / fasteners, mounting or cover plates, frames, etc.
e) For firestop spray products: does the applied firestop spray overlap the adjacent surfaces properly?
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