Install Instructions
Image 24 
Image 25 
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Measure the dimensions of the selected spacer brackets to determine the hole size that must be cut into the floor or consult 
Table 7 if part I.D. matches. 
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Transfer this dimension to the predetermined breaching floor locations and cut hole. 
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Cut a square hole and clear any flooring material so that a proper frame can be installed. 
i. When cutting the opening, allowance must be made for the thickness of the frame and frame the opening of 
the floor using lumber, which is dimensionally consistent with the structural members. 
NOTICE 
In the event that floor joists must be cut follow the building codes having jurisdiction for reframing the opening. 
A support clamp is supplied with a Firestop Spacer Support. The support clamp is to be installed around vertical pipe (and to 
or through support clamp brackets when include) just above the top of the Firestop Spacer Support plate(s). 
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Install vertical vent pipe through center hole of Firestop Spacer plate(s) with 4 spacer brackets facing downward. When 
design has 2 plate halves, interlock 2 spacer brackets between Firestop Spacer plates. 
Secure Firestop Spacer plates(s) to top of framed opening using the appropriate drill and screws. 
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Complete pipe connections. 
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Check the height and or level of the vent for correctness and tighten the Firestop Spacer Support clamp as it rests on the 
plate(s). 
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Seal any openings in Firestop Spacer / Support including around outer vent pipe and firestop/ceiling/joists with 
field supplied firestop sealant. Discuss sealant and assembly with firestop professional and local building and fire 
officials to ensure fire stop meets with local code requirements. (See Image 26) 
Image 26 
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