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Positive Pressure Fire Doors
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Intumescent
for Holder/Closer/Pivot
Hardware Positive Pressure Approvals
Installation Instructions
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Several
Marshfield DoorSystems® Positive Pressure Approvals require
the use of intumescent in the hardware pocket. Devices typical
of this installation are Holders, Closers, and Pivots. In
attempt to simplify the understanding of these approvals for
our customers, the following recommended
installation guide is provided.
1. Intumescent is required in the pocket with the hardware.
The intumescent is to be located such that it extends across
the entire device and is free to expand in case of fire. This
means that the
intumescent should be located between the device and the floor
for bottom pivots and floor closers, and in the bottom of
the track for closer and holder hardware. {See the example
sketches}
2. Zero FS3000 is the recommended intumescent. Please verify
the thickness and other key
dimensions to ensure that the intumescent will fit within
the hardware cutout.
3. Prepare the intumescent by cutting it to length and / or
width depending on the size of the
hardware cutout and the hardware device. Attempt to maximize
coverage of the device while fitting within the cutout.
4. Zero FS3000 comes with an adhesive backer. Remove the backer
and affix the intumescent to the device as indicated in the
example sketches. If intumescents other than Zero FS3000 are
used, please refer to the manufacturer's instructions to determine
proper application procedure.
Example Installation Locations: |
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