Introduction:
This report presents test results of Flame Spread and Smoke
Developed Values per ASTM E-84-98. The report also includes
Material Identification, Method of Preparation, Mounting and
Conditioning of the specimens.
The tests were performed in accordance with the specifications
set forth in ASTM E-84-98, Standard Test Method for Surface
Burning Characteristics of Building Materials," both as
to equipment and test procedure. This test procedure is similar
to UL-723,ANSI No. 2.5, NFPA No. 255 and UBC 42-1.
The test results cover two parameters: Flame Spread and Smoke
Developed Values during a 10-minute fire exposure. Inorganic
cement board and red oak flooring are used as comparative standards,
and their responses are assigned arbitrary values of 0 and 100,
respectively.
Preparation
and Conditioning:
Three 8 feet x 2 feet panels were fitted end-to-end to form
a 24" x 24'0" sample.
Since the sample was self-supporting, no further preparation
was necessary.
Test
Procedure:
The tunnel was thoroughly pre-heated by burning natural gas.
When the brick temperature, sensed by a floor thermocouple,
has reached the prescribed 105 degrees Fahrenheit +_ 5o Fahrenheit
level, the sample was inserted in the tunnel and test conducted
in accordance with the standard ASTM E-84-98 procedures.
The operation of the tunnel was checked by performing a 10-minute
test with inorganic board on the day of the test.
Test Results:
The test results, calculated in accordance with ASTM E-94-98
for Flame Spread and Smoke Developed Values are as follows:
| Test
Specimen: |
"1/4"
Thick Acrylic - White" |
| Flame
Spread Index*: |
15 |
| Smoke
Developed Value*: |
20 |
*Graphs of the Flame Spread, Smoke Developed and Time-Temperature
are shown at the end of this report.
Observations:
Ignition was noted after 205 seconds followed by charring and
blistering of the specimen directly exposed to the flame. The
flamefront advanced 10.6 feet after 9.4 minutes. Afterburn was
evident upon test completion.
Rating:
The National Fire Protection Association Life Safety Code 101,
Section 6-5.3, "Interior Wall and Ceiling Finish Classification,"
has a means of classifying materials with respect to Flame Spread
and Smoke Developed when tested in accordance with NFPA 255,
"Method of Test of Surface Burning Characteristics of Building
Materials, (ASTM E-84).
The classifications are as follows:
|
Class
A Interior Wall & Ceiling Finish:
|
Flame
Spread
Smoke Developed |
0-25
0-450 |
| Class
B Interior Wall & Ceiling Finish: |
Flame
Spread
Smoke Developed |
26-75
0-450 |
| Class
C Interior Wall & Ceiling Finish: |
Flame
Spread
Smoke Developed |
76-200
0-450 |
Since the sample received a Flame Spread of 15 and a Smoke Developed
Value of 20, it would fall into the Class A Interior Wall &
Ceiling Finish Category.