Table 1
|
Reported Flame Spread Indices
|
Material1
|
ASTM E-84 Flame
Spread2
|
Source3
|
Material1
|
ASTM E-84 Flame
Spread2
|
Source3
|
LUMBER |
SOFTWOOD PLYWOOD (Exterior
Glue5) |
Birch,
Yellow |
105-110 |
UL |
Cedar
3/8" |
70-95 |
APA |
Cedar, Pacific Coast
Yellow |
78 |
CWC |
Douglas Fir
1/4" |
150 |
APA |
Cedar, Western
Red |
70 |
HPVA |
Douglas Fir
5/16" |
115-155 |
APA |
Cedar, Western
Red |
73 |
CWC |
Douglas Fir
3/8" |
110-150 |
APA |
Cherry
3/4" |
76 |
HPVA |
Douglas Fir
1/2" |
130-150 |
APA |
Cottonwood |
115 |
UL |
Douglas Fir
5/8" |
95-130 |
APA |
Cypress |
145-150 |
UL |
Hemlock
3/8" |
75-160 |
APA |
Elm
3/4" |
76 |
HPVA |
Southern Pine
1/4" |
95-110 |
APA |
Fir,
Douglas |
70-100 |
UL |
Southern Pine
3/8" |
100-105 |
APA |
Fir, Douglas 3/4" flooring |
83-98 |
WEY |
Southern Pine
5/8" |
90 |
APA |
Fir, Amabilis
(Pacific Silver) |
69 |
CWC |
Redwood
3/8" |
95 |
UL |
Gum,
Red |
140-155 |
UL |
Redwood
5/8" |
75 |
UL |
Hemlock, West
Coast |
60-75 |
UL |
HARDWOOD PLYWOOD6 |
Hemlock, West
Coast |
73 |
WEY |
Ash 3/4" -
Particleboard Core |
134 |
HPVA |
Maple
(flooring) |
104 |
CWC |
Birch 1/4" - Douglas
Fir Veneer Core |
135-173 |
HPVA |
Oak, Red or
White |
100 |
UL |
Birch 1/4" - Fuma
Veneer Core |
127 |
HPVA |
Oak, Red
3/4" |
84 |
HPVA |
Birch 3/4" - Douglas
Fir Veneer Core |
114 |
HPVA |
Oak, White
3/4" |
77 |
HPVA |
Birch 3/4" - High
Density Veneer Core |
114 |
HPVA |
Pecan
3/4" |
84 |
HPVA |
Birch 3/4" -
Particleboard Core |
124 |
HPVA |
Pine, Eastern
White |
85 |
CWC |
Birch 3/4" - MDF
Core |
134 |
HPVA |
Pine, Idaho
White |
72 |
HPVA |
Honduras Mahogany
3/4" - Particleboard Core |
105 |
HPVA |
Pine, Idaho
White |
82 |
WEY |
Lauan
11/64" |
167 |
NIST |
Pine,
Lodgepole |
98 |
WEY |
Lauan
1/4" |
150 |
HPVA |
Pine, Northern
White |
120-215 |
UL |
Oak 1/4" - Douglas
Fir Veneer Core |
153 |
HPVA |
Pine,
Ponderosa4 |
105-230 |
UL |
Oak 3/4" - MDF
Core |
123 |
HPVA |
Pine,
Ponderosa |
115 |
HPVA2 |
PARTICLEBOARD |
Pine,
Red |
142 |
CWC |
3/16" (Aromatic
Cedar Flakeboard) |
156 |
HPVA |
Pine, Southern
Yellow |
130-195 |
UL |
3/8" |
200 |
UL |
Pine, Western
White |
75 |
UL |
1/2" |
135 |
HPVA |
Poplar |
170-185 |
UL |
1/2" |
156 |
NIST |
Redwood |
70 |
UL |
5/8" |
153 |
NIST |
Redwood
3/8" |
102 |
UL |
11/16" |
168 |
UL |
Spruce,
Engelmann |
55 |
HPVA2 |
3/4" |
145 |
UL |
Spruce,
Northern |
65 |
UL |
3/4"(Exterior
Glue5) |
88-98 |
APA2 |
Spruce,
Sitka |
74 |
CWC |
MEDIUM
DENSITY FIBERBOARD - MDF |
Spruce,
Western |
100 |
UL |
3/8" |
140 |
UL |
Walnut |
130-140 |
UL |
7/16" |
125 |
HPVA |
Walnut
3/4" |
101 |
HPVA |
5/8" |
120 |
HPVA |
ORIENTED STRAND BOARD, WAFERBOARD (Exterior
Glue5) |
11/16" |
140 |
UL |
5/16" |
127-138 |
APA2 |
3/4" |
140 |
HPVA |
7/16" |
86-150 |
APA2 |
3/4" |
140 |
HPVA |
1/2" |
74-172 |
APA2 |
3/4" |
130 |
HPVA |
3/4" |
147-158 |
APA2 |
1" |
90 |
UL |
Copyright © 1997, 1998
American Forest & Paper Association |
SHAKES
and SHINGLES |
Western Red Cedar
Shakes 1/2" |
69 |
HPVA |
Western Red Cedar
Shingles 1/2" |
49 |
HPVA |
TABLE 1
FOOTNOTES
1 Thickness of material tested is
one-inch nominal except where indicated. |
2 The
ASTM E-84 test method has been revised a number of times during the years
referenced by the source reports. However, the E-84 test apparatus has
changed little over this period. Slightly different flame spread indices,
usually lower, result when recent E-84 flame spread calculation techniques
are applied to older wood product data. These changes in flame spread
indices are not sufficient to change the flame spread class for the wood
products described in this report. |
3 Sources:
APA -APA-The Engineered Wood Association, Research Reports 128,
Revised, August 1979.
APA2 - APA-The
Engineered Wood Association Test Results
CWC -Wood and Fire Safety, Canadian Wood Council,
1991.
HPVA -Hardwood Plywood and
Veneer Association, Test Reports, 202, 203, 335, 336, 337, 592, and 596;
Special flame spread performance tests, Aug. 1974; T9234, T9237, T9317,
T9344, T9354, May 1995; T9422, T9430, T9431, T9453, T9665, Feb/July
1997.
HPVA2 - Hardwood Plywood and
Veneer Association, March/April 1995.
NIST-National Institute of Standards and Technology (formerly
National Bureau of Standards), Technical Notes 879 and
945.
UL -Underwriter's Laboratory, UL
527, May 1971; Subject 723, Assignment 71SC509, Mar 15 &16,1971;
Assignment 84NK1898, File R10917, Mar 9, 1984.
WEY -Weyerhaueser Fire Laboratory, 1973, 1987, January & February 1988. |
4 Average of 18 tests was 154 with three values over
200. |
5 Exposure 1 or exterior. |
6 Flame spread of plywood is affected by the species of the face
veneer but can also be influenced by the species of the underlying core
veneer. Various panel constructions involving certain core species show a
relatively high degree of variability and potential to yield flame spread
values above 200. Panel constructions involving cores of aspen, sumauma,
yellow poplar and white fir have exhibited this behavior with average
flame spread indices ranging from 78 to 259. Other factors, in addition to
species, including material and process variables related to specific
manufacturers can also affect flame spread. Thus, for plywood panels with
certain core species, test data from the actual manufacturer is
particularly important in establishing the flame spread classification of
the product. |
Copyright © 1997, 1998
American Forest & Paper
Association |
|