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 ?
OBSERVATION COMMENTS Yes No N / A
Yes No N / A
Yes No N / A
Yes No N / A
Yes No N / A
Yes No N / A
Yes No N / A
Yes No N / A
Yes No N / A
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