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1. CONCRETE FLOOR ASSEMBLY: 2 hour rated concrete floor assembly made from either lightweight or normal weight concrete with a density
of 100 to 150 pcf, having a min. thickness of 6 in. at the joint face. When a longitudinal recess (blockout) is required to contain an architectural
joint system, increase concrete floor assembly thickness to maintain a min. thickness of 6 in. and accommodate depth of blockout formed in
the concrete: blockout width unrestricted.
2. CURTAIN WALL ASSEMBLY: The curtain wall assembly shall incorporate the following construction features:
A. Mounting Attached (Not Shown) - Attach aluminum framing (Item 2B) to the structural framing according to the curtain wall manufacturer's
instructions. Connect the mounting attachments to the joint face of the concrete floor assembly (Item 1) according to the curtain wall
manufacturer's instructions.
B. Aluminum FRAMING - Size rectangular aluminum tubing mullions and transoms according to the curtain wall system manufacturer's
guidelines. Min. overall dimensions of framing required is 0.100 in. thick aluminum with a min. 3-3/4 in. width of the extrusion. Mullion and
transom covers are added to the external side of the framing, giving the framing system a total mullion depth of nominally 5-1/4 in. (with
cover plate). Mullions are to be spaced a min. 60 in. on center (oc) and spandrel transoms are to be spaced a min. 19 in. oc. Locate the
upper transom such that the bottom surface of the transom is at the same height as the top surface of the floor assembly.
C. GLASS PANELS - Size and install glass panels to curtain wall framing according to the curtain wall system manufacturer's guidelines. Use
min. 1/4 in. thick cleat, heat-strengthened (HS) glass with a max. width and height less than the aluminum framing oc spacing, which
allows the glass to be secured between the notched shoulder of the aluminum framing and pressure bar. Secure panels with a thermal
break (rubber extrusion), pressure bar (aluminum extrusion), min. 1/4-20 × 5/8 in. long screws, and a snap face (aluminum extrusion).
D. IMPALING PINS - Size and install min. 12 GA steel pins a min. 1/2 in. longer than the thickness of the curtain wall insulation. Attach pins
to the back pan (Item 2E) in two rows at 12 in oc.
E. BACK PAN - Mount a steel back pan (min. 22 GA.) with 1-1/2 in. lip flush with the interior face of the framing, and screw attached to the
framing along top and sides with 1/2 in. long No. 10 self-drilling screws at 8 in. oc. Apply pressure sensitive aluminum foil faced tape
around the periphery of the back-pan sealing to the adjacent aluminum framing.
F. CURTAIN WALL INSULATION - Install nominal 3 in. thick 8 pcf density mineral wool batt insulation. Secure with impaling pins (Item 2D)
and steel clinch shields.
3. PERIMETER JOINT PROTECTION: The perimeter joint (linear opening) is not to exceed nominal 4 in. joint width (joint width at installation).
Incorporate the following construction features:
A. PACKING MATERIAL - Install 6 in. thick Thermafiber Safing (4pcf) packed into the width of the joint flush with the top surface of the floor
at 25% compression. Strips installed so that the factory compressed layers of the safing are parallel to the horizontal face of the slab edge.
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 discussed below.
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.
* Before testing, the test specimen was subjected to ±12.5% vertical and ±12.5% horizontal (±0.5 in. vertical and ±0.5 in horizontal) movement
through a min. of 100 times at 30 cpm, followed by a min. of 400 cycles at 10 cpm for both vertical and horizontal cycling.
** UL 2079
Hilti Firestop Systems
Design No. HI/BPF 120-12
HI/BPF 120-12
Reproduced by HILTI, Inc.
Courtesy of  Intertek Group
November 14, 2017