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Hilti Firestop Systems
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3. PERIMETER JOINT PROTECTION: Do not exceed a 4 in. nominal joint width (joint width at installation). Incorporate the following
construction features for the perimeter joint protection (also known as perimeter fire barrier system):
A. CERTIFIED MANUFACTURER: Thermafiber, Inc.
CERTIFIED PRODUCT: Safing
Packing Material - Use min. 6 in. tall, 4 pcf density, mineral wool batt insulation and cut packing material width to achieve 25%
compression when installed in the nominal joint width, and use no more than two adjacent strips. Install insulation with the fibers running
parallel to the edge of concrete floor assembly (Item 1) and curtain wall assembly (Item 2A). Tightly compress together splices (butt joints)
in the lengths of packing material by using min. 1/4 in. compression per piece of packing material. Locate the top surface of the packing
material flush with the top surface of the concrete floor assembly (Item 1).
B. CERTIFIED MANUFACTURER: Hilti Corporation
CERTIFIED PRODUCT: Firestop Joint Spray CFS-SP WB or Silicone Joint Spray CFS-SP SIL
Fill, Void, or Cavity Material - Apply over the packing material (Item 3A) as follows:
Apply at the thickness specified in Table 1 and overlap the material 1/2 in. onto the adjacent curtain wall assembly and concrete floor slab
assembly.  When the spraying process is stopped and the applied liquid cures to an elastomeric film before application is restarted,
overlap the edge of the cured material at least 1/8 in. with the spray.  Reference Product Section of the Intertek Directory for more details
on the Listed product.
Reproduced by HILTI, Inc.
Courtesy of  Intertek Group
December 21, 2018
HI/BPF 120-14
Design No. HI/BPF 120-14