Page 32 - UL_Report On_Part 1

25 IITGN-UL/Façade
f. Fire fighting
The test facility is provided with an external hydrant system.
Underground mains are laid 1m below the ground level. Hydrant stand
post (single) with nominal pipe size 75mm made of mild steel and
having 80mm flanged inlet and outlet (ANSI B 16.5 150# or other),
mouthed with standard 63mm size hydrant valve is installed at a
distance of 3m from the face of the building.
Fire brigade inlet having gunmetal body with three gunmetal male
instantaneous inlets of size 63mm (with NRV) and 100mm size flanged
outlet are connected to dry riser piping. Fire brigade inlet body is
provided with drain valve.
Internal hydrants are provided inside the building near the exit staircase
area at each floor. One hose reel arrangement is provided at every
internal hydrant location.
Galvanized iron pipes conforming to IS: 1239 are used for hydrant system.
Pipes were painted with a coat of primer and two coats of synthetic
enamel paint are applied for above ground piping whereas for
underground piping coating and wrapping are done as per IS standards.
g. Fire doors
1.5 hour UL rated fire doors are used between the compartments to
prevent propagation of fire and smoke from one compartment to
another at same level during a test.
26 IITGN-UL/Façade
Single swing steel stiffened doors of 16 gauge galvanized steel incorporating Curtain wall Insulation: 2B 2G
single point latches are installed. Thickness of door is 46mm (1-3/4”). Steel 2D
stiffened doors are known for their rigidity and are available in varying a. Forming material 2I
strength and quality. Spacing between stiffeners is about 4” and are welded to
each other at the top and bottom and to the inside door skin. The cavities are Nominal density 4 pcf (pounds per cubic feet) (64 kg/m3) mineral wool is used for 2E 2H 3B
filled with special core. In the test, cavities in the doors used are filled with batt insulation. Bat sections are cut to a minimum 4½ inch width and stacked to a
mineral Rockwool (4-pcf). thickness which is minimum 20% greater than the width of linear gap between the 2C 1
Door leafs are provided with vision panels for visibility. These doors are curtain wall insulation and edge of the concrete floor slab. The forming material is
provided with glass panels of size 100 sq. in. compressed and inserted cut-edge first into linear gap such that its top surface is 2F
flushed with the top surface of the floor assembly. A maximum of one tightly butted
h. Fire stop seam is permitted between mullions. 3A
Excellent thermal performance: RSI value of 0.7 per 25mm of thickness
A gap is always provided between the cladding and the deck slab of the Durable and Inorganic: Does not support growth of fungi, nor does it sustain vermin
building to avoid crashing of glass in case of unwanted vibrations and also to Quick installation: Convenient job site fabrication
mitigate effects of thermal expansion. This gap is about 150mm and in each
test needs to be filled with a suitable fire stop material. In case of fire event, the b. Fill material
performance of the façade as well as of the fire stop material is crucial for the 2C
overall performance of the building. Fire stop material should have sufficient Minimum 1/8 inch thickness of fill material spray is applied over top of forming
fire rating to prevent fire from spreading internally. material and lapping of minimum ½ inch onto the top surface of the floor and 2F
Tests 1, 2 and 3 utilizes UL rated glasswool as fire stop material whereas test 4 curtain wall insulation and framing covers.
utilizes normal fire stop material provided in form of plywood sheets which 2F
results in internal fire spread due to premature failure of fire stop material
before glass breakage. 1.5 hour rated fire stop material is used at each floor level
for tests 1, 2 and 3. 2A 1
2B
Figure 14: Typical curtain wall insulation