ad hoc flame resistance test of 3/4 in. plywood · 2016. 3. 29. · project no. 16497-118553 april...

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OMEGA POINTLABORATORIES, INC.

16015 Shady Falls RoadElmendorf, TX 78112

(v) 210-635-8100(f) 210-635-8101

800-966-5253www.opl.com

AD HOC

FLAME RESISTANCETEST OF 3/4 IN. PLYWOOD

Project No. 16497-118553

Small-Scale Horizontal Test of theBurn-Through Rate of 3/4 in. Plywood

April 19, 2004

Prepared for:

American Pyrotechnics Association4808 Moorland Lane, Suite 109

Bethesda, MD 20814

Omega Point Laboratories, Inc.16015 Shady Falls Road

Elmendorf, Texas 78112-9784210-635-8100 / FAX: 210-635-8101 / 800-966-5253

www.opl.com / e-mail: [email protected]

a

No. 0689-01

Abstract

A 36 in. x 36 in. x 3/4 in. thick panel of plywood was mounted in a small-scale horizontal testframe and exposed to the standard fire exposure conditions of UBC Standard 7-1 until flame-through occurred. The sample size, configuration, and fire exposure curve were the sameutilized in UBC Standard 26-2 Test Method for the Evaluation of Thermal Barriers, but there wereenough modifications to that method that this should not be considered a thermal barrier test.

This report and the information contained herein is for the exclusive use of the client named herein. Omega PointLaboratories, Inc. authorizes the client to reproduce this report only if reproduced in its entirety. The description ofthe test procedure, as well as the observations and results obtained, contained herein are true and accurate withinthe limits of sound engineering practice. These results apply only for the specimens tested, in the manner tested,and may not represent the performance of other specimens from the same or other production lots nor of theperformance when used in combination with other materials. The test specimen identification is as provided bythe client and Omega Point Laboratories Inc. accepts no responsibility for any inaccuracies therein. Omega Pointdid not select the specimen and has not verified the composition, manufacturing techniques or quality assuranceprocedures. This report does not imply certification of the product by Omega Point Laboratories, Inc. Any use ofthe Omega Point Laboratories name, any abbreviation thereof or any logo, mark, or symbol therefore, for ad-vertising material must be approved in writing in advance by Omega Point Laboratories, Inc. The client must haveentered into and be actively participating in a Listing & Follow-up Service program. Products must bear labels withthe Omega Point Laboratories Certification Mark to demonstrate acceptance by Omega Point Laboratories, Inc.into the Listing program.

Michael E. Dey Date: April 19, 2004Manager, Fire Resistance

Reviewed and approved:

William E. Fitch, P.E. No. 55296 Date: April 19, 2004

Project No. 16497-118553 April 19, 2004American Pyrotechnics Assoc. Page iii

TABLE OF CONTENTSITEM PAGE

Introduction 1

Test Procedure 1

Test Specimen 3

Test Results and Observations 3

Conclusions 4

Appendices

Appendix A: Thermocouple Layout 5

Appendix B: Thermocouple Data

Appendix C: Photographs 14

Last Page of Report 21

Project No. 16497-118553 April 19, 2004American Pyrotechnics Assoc. Page 1

INTRODUCTION

This project was undertaken to evaluate the burn-through rate of a piece of 3/4-in. plywood. Itwas an exploratory test for possible use in determining how a "flame break" should perform asrequired by NFPA 1124 - 2003 for the retail sales displays of consumer fireworks, 1.4G. Whilethe basic setup and test apparatus are also used in UBC Standard 26-2 Test Method for theEvaluation of Thermal Barriers, several differences exist between that method and the test thatwas actually performed, including:

UBC 26-2 Actual Test Performed

9 TCs at interface of calcium silicate boardand thermal barrier (test specimen)

3 TCs on unexposed face of test specimencovered with 6” x 6” UBC Standard 7-1mineral fiber pads

Must be tested with a joint present No joints present

15 min.exposure PASS/FAIL criteria of 250°avg. or 325° max temperature rise

Test end point determined as first sign offlaming on unexposed face

TEST PROCEDURE

The 7' x 7' horizontal fire resistance furnace is fitted with 25 uniformly located diffuse-flamepropane gas burners providing an even heat flux distribution across the face of the test speci-men. Furnace pressures can be maintained at +0.04" W. C. to -0.20" W. C. For this test, theneutral pressure plane was controlled at the test specimen location.

The temperature within the furnace is determined to be the mathematical average ofthermocouples located symmetrically within the furnace and positioned twelve inches below theunder, horizontal surface of the test specimen. The materials used in the construction of thesethermocouples are those suggested in the UBC Standard 7-1 fire test standard. During theperformance of a fire exposure test, the furnace temperatures are monitored every 6 seconds anddisplayed to maintain control of the temperature along the specified time-temperature curve.


1510500

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Tem

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(°

F)Time(min)

05

1015

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68100013001399

Figure 1

The fire exposure is controlled to conform with the standard time-temperature curve shown inFigure 1 above which is specified in UBC Standard 7-1 Fire Tests of Building Construction andMaterials. The furnace interior temperature during a test is controlled such that the area underthe actual time-temperature curve is within 10% of the corresponding area under the standardtime-temperature curve.

The fire exposure was continued on the test specimen until flaming occurred on almost half ofthe unexposed face.

The test frame consisted of a 7’ x 7’ wood frame constructed of 2 x 4 lumber covered on theexposed face with two layers of 5/8” thick Type X gypsum wallboard. A 36” x 36” opening wasthen cut in the wallboard for placement of the plywood test specimen.

Once assembled, the test specimen was placed over the opening in the test frame and the entireframe then lifted into position on the horizontal fire resistance furnace.

Temperatures on the unexposed face were monitored using three 24 GA., Type Kthermocouples.

The three thermocouples were located on the unexposed face of the plywood along the diagonalat the midpoint and centered in each corner. The thermocouples were covered with 6” x 6”mineral fiber pads.


TEST SPECIMEN

The plywood used for this test was 23/32 in. APA Rated Sturd-I-Floor®,Group 1, Exterior.

APA Rated Sturd-I-Floor® (3/4 – in. plywood)

An APA Performance Rated Panel designed and manufactured specifically forresidential and other light frame single-floor (combined subfloor-underlayment)applications for use under carpet. APA RATED STURD-I-FLOOR can be manufacturedwith Span Ratings of 16, 20, 24, 32 and 48 oc, in thicknesses ranging from 19/32 to 1-1/8inch, and in three exposure durability classifications - Exterior, Exposure 1 and Exposure2. Panels are available with either square edges or tongue-and-groove edges as specified.APA RATED STURD-I-FLOOR 48 oc plywood, commonly called 2-4-1, is also used inheavy timber roof construction.

Exterior panels have a fully waterproof bond and are designed for applications subject topermanent exposure to the weather or to moisture.

TEST RESULTS AND OBSERVATIONS

On April 12, 2004, the test assembly was placed atop the Laboratory's horizontal fire resistancefurnace. After connecting the thermocouples to the data acquisition system and verifying theiroutputs, the furnace was fired and the UBC Standard 7-1 standard time-temperature curve wasfollowed for 14 minutes. The furnace was then extinguished and the test specimen removedfrom the furnace and extinguished with water from a garden hose.

Observations made during the test are as follows:

Time(min:sec) Observation

0:00 Start of test1:20 Exposed surface turning black1:45 Ignition of the exposed side of the plywood

10:00 Brown spots appear on the unexposed surface at several locations10:33 A glowing ember has appeared on the unexposed face10:38 Ignition of the plywood on the unexposed face near the front right11:20 Ignition of the plywood on the unexposed face near the rear center12:15 Ignition of the plywood on the unexposed face near the front center13:17 Ignition of the plywood on the unexposed face near the right center14:00 Test terminated


The thermocouple locations on the unexposed surface can be found in Appendix A. Listingsand plots of the furnace control temperatures and test specimen unexposed surface (cold side)temperatures may be found in Appendix B. A photo documentation is contained in AppendixC.

CONCLUSIONS

The 3/4 – in APA Rated Sturd-I-Floor® plywood tested as described herein had flaming ignitionon the unexposed surface(flame through) after 10 minutes, 38 seconds of exposure to thestandard fire exposure curve specified in UBC Standard 7-1.

Project No. 16497-118553 April 19, 2004American Pyrotechnics Assoc. APPENDICES

APPENDIX A

THERMOCOUPLE LAYOUT

5

1'-6"

9"

9"

1'-6

"

9"

9"

1

2

3

9"

9"

OMEGA POINT LABORATORIES, INC.Project No. 16497-118553

American Pyrotechnics Association

Figure 1 - Thermocouple Layout

Scale 1:8

Note:

Temperatures on the unexposed surface were monitored using three 24 GA., fiberglass insulated Type K thermocouples as indicated, covered with 6" x 6" mineral fiber pads.

6


APPENDIX B

THERMOCOUPLE DATA

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American Pyrotechnics AssociationProject No. 16497-118553

3/4" PlywoodFigure 1 - Furnace Interior Temperatures

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UBC Std. 7-1Furnace Avg.

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American Pyrotechnics AssociationProject No. 16497-118553

3/4" PlywoodFigure 2 - Individual Unexposed Surface (Cold Side) Temperatures

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TC #1TC #2TC #3

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American Pyrotechnics Assoc. Project No. 16497-1185533/4 in. plywood

April 19, 2004

Integration Integration Furnace Furnace FurnaceStandard Furnace of Furnace of E119 Std Probe Probe Probe

Time Average Average Average Average Error #1 #2 #3(min) (°F) (°F) (°F•min) (°F•min) (%) (°F) (°F) (°F)

0 68 65 0 0 0.00 65 65 650.1 87 65 0 0 0.00 66 65 650.2 105 67 0 1 -130.85 68 66 670.3 124 69 0 4 -112.74 70 67 680.4 143 72 -1 8 -105.96 74 69 720.5 161 78 0 15 -101.84 81 72 770.6 180 85 0 23 -98.28 90 77 840.7 198 95 2 34 -94.86 102 83 940.8 217 108 4 46 -91.43 115 91 1080.9 236 125 7 60 -87.89 133 102 129

1 254 147 12 75 -84.04 157 115 1551.1 273 173 19 93 -79.79 186 131 1851.2 292 202 28 113 -75.15 216 149 2191.3 310 231 40 134 -70.23 247 169 2541.4 329 260 55 158 -65.22 276 189 2891.5 348 287 73 183 -60.30 303 210 3231.6 366 315 93 210 -55.62 330 231 3591.7 385 341 116 239 -51.22 355 251 3941.8 404 365 142 269 -47.13 378 271 4241.9 422 388 171 302 -43.39 400 291 453

2 441 409 202 336 -40.02 421 309 4802.1 459 430 235 373 -36.99 440 328 5062.2 478 448 270 411 -34.30 457 345 5302.3 497 465 307 451 -31.92 473 362 5512.4 515 481 346 493 -29.83 488 377 5712.5 534 496 386 537 -28.01 502 393 5892.6 553 511 429 583 -26.43 516 407 6062.7 571 525 472 630 -25.07 528 422 6222.8 590 538 517 679 -23.90 540 436 6372.9 609 550 563 731 -22.90 551 449 651

3 627 562 611 784 -22.05 562 461 6643.1 646 573 660 839 -21.34 572 474 6753.2 664 584 710 896 -20.76 582 486 6863.3 683 595 761 954 -20.28 593 498 6953.4 702 608 813 1015 -19.91 606 511 7083.5 720 622 866 1077 -19.60 622 525 7243.6 739 638 921 1142 -19.34 638 541 7423.7 758 656 977 1208 -19.10 657 558 7633.8 776 675 1035 1276 -18.88 677 576 7853.9 795 695 1095 1346 -18.66 698 596 808

4 814 716 1156 1418 -18.42 719 617 8324.1 832 738 1220 1491 -18.18 741 639 8564.2 851 759 1286 1567 -17.91 763 662 8804.3 870 781 1354 1644 -17.64 785 685 9044.4 888 803 1424 1723 -17.35 807 708 9284.5 907 825 1497 1804 -17.05 828 731 9504.6 925 845 1571 1887 -16.74 848 753 9734.7 944 866 1648 1972 -16.44 868 775 996

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April 19, 2004



4.8 963 885 1727 2059 -16.13 887 796 10184.9 981 905 1807 2147 -15.83 905 817 1040

5 1000 924 1890 2238 -15.53 923 837 10615.1 1006 941 1975 2330 -15.25 940 856 10805.2 1012 959 2061 2424 -14.95 957 875 10995.3 1018 975 2149 2518 -14.63 973 893 11185.4 1024 991 2239 2612 -14.28 987 911 11365.5 1030 1007 2331 2708 -13.92 1002 928 11535.6 1036 1022 2424 2804 -13.54 1015 945 11695.7 1042 1036 2519 2900 -13.15 1029 961 11845.8 1048 1051 2615 2997 -12.76 1042 977 11995.9 1054 1064 2712 3095 -12.36 1054 991 1213

6 1060 1076 2811 3193 -11.96 1065 1005 12276.1 1066 1089 2911 3292 -11.57 1076 1019 12406.2 1072 1100 3013 3392 -11.17 1086 1031 12516.3 1078 1110 3115 3492 -10.78 1096 1043 12626.4 1084 1121 3219 3592 -10.39 1106 1055 12726.5 1090 1131 3324 3694 -10.01 1115 1066 12826.6 1096 1140 3430 3796 -9.64 1124 1076 12916.7 1102 1149 3536 3898 -9.28 1133 1086 12996.8 1108 1158 3644 4001 -8.93 1142 1097 13076.9 1114 1166 3752 4105 -8.59 1150 1106 1314

7 1120 1175 3862 4209 -8.25 1159 1117 13217.1 1126 1182 3972 4314 -7.93 1167 1126 13277.2 1132 1190 4083 4420 -7.61 1175 1136 13347.3 1138 1198 4195 4526 -7.31 1183 1145 13417.4 1144 1206 4307 4632 -7.01 1191 1154 13477.5 1150 1213 4421 4740 -6.73 1197 1162 13537.6 1156 1219 4535 4848 -6.45 1204 1170 13587.7 1162 1226 4650 4956 -6.18 1210 1178 13637.8 1168 1232 4765 5065 -5.92 1216 1185 13687.9 1174 1238 4881 5175 -5.67 1222 1192 1373

8 1180 1244 4998 5285 -5.43 1229 1198 13788.1 1186 1250 5115 5396 -5.21 1234 1205 13838.2 1192 1255 5233 5508 -4.98 1239 1211 13878.3 1198 1260 5351 5620 -4.77 1244 1217 13928.4 1204 1265 5470 5732 -4.57 1248 1223 13978.5 1210 1270 5590 5846 -4.38 1253 1228 14018.6 1216 1275 5710 5960 -4.19 1257 1233 14058.7 1222 1280 5830 6074 -4.01 1261 1238 14108.8 1228 1284 5951 6189 -3.84 1265 1243 14148.9 1234 1289 6073 6305 -3.68 1269 1247 1419

9 1240 1293 6194 6421 -3.53 1272 1251 14249.1 1246 1297 6317 6538 -3.39 1276 1255 14299.2 1252 1302 6439 6656 -3.25 1281 1259 14349.3 1258 1306 6563 6774 -3.12 1285 1263 14389.4 1264 1310 6686 6892 -2.99 1288 1267 14429.5 1270 1314 6810 7012 -2.87 1292 1271 1446

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April 19, 2004



9.6 1276 1318 6935 7132 -2.76 1296 1275 14499.7 1282 1321 7059 7252 -2.66 1299 1279 14529.8 1288 1324 7184 7373 -2.56 1302 1283 14549.9 1294 1328 7310 7495 -2.47 1305 1286 145710 1300 1331 7436 7617 -2.38 1308 1289 1460

10.1 1309 1334 7562 7740 -2.30 1311 1292 146310.2 1311 1337 7688 7864 -2.23 1313 1296 146610.3 1313 1340 7815 7988 -2.16 1316 1298 146910.4 1315 1342 7942 8112 -2.10 1318 1301 147110.5 1317 1346 8069 8237 -2.03 1321 1305 147510.6 1319 1349 8197 8362 -1.97 1324 1309 147810.7 1322 1352 8325 8487 -1.91 1328 1312 148110.8 1324 1355 8453 8612 -1.85 1331 1316 148310.9 1326 1358 8582 8737 -1.78 1334 1319 1485

11 1328 1361 8711 8863 -1.72 1337 1323 148811.1 1330 1364 8840 8989 -1.66 1340 1326 149011.2 1332 1367 8969 9115 -1.60 1343 1330 149211.3 1334 1370 9099 9241 -1.54 1346 1334 149511.4 1335 1373 9229 9368 -1.48 1350 1337 149811.5 1337 1376 9359 9494 -1.42 1353 1340 150011.6 1339 1378 9490 9621 -1.37 1355 1343 150211.7 1341 1381 9621 9748 -1.31 1357 1346 150611.8 1343 1384 9752 9875 -1.25 1360 1348 150911.9 1345 1386 9883 10003 -1.20 1362 1350 1511

12 1347 1387 10015 10130 -1.14 1363 1352 151212.1 1349 1389 10147 10258 -1.09 1364 1353 151412.2 1350 1391 10279 10386 -1.04 1366 1355 151612.3 1352 1393 10411 10514 -0.98 1367 1357 151912.4 1354 1395 10543 10643 -0.93 1369 1358 152112.5 1356 1396 10676 10771 -0.89 1370 1359 152212.6 1358 1397 10809 10900 -0.84 1371 1361 152412.7 1359 1399 10941 11029 -0.79 1373 1363 152612.8 1361 1401 11074 11158 -0.75 1375 1364 152912.9 1363 1404 11208 11287 -0.70 1377 1367 1531

13 1364 1406 11341 11416 -0.66 1379 1369 153413.1 1366 1408 11475 11546 -0.62 1380 1371 153613.2 1368 1410 11609 11676 -0.57 1382 1373 153813.3 1369 1412 11743 11806 -0.53 1384 1375 154113.4 1371 1415 11877 11936 -0.49 1387 1377 154513.5 1373 1418 12011 12066 -0.45 1390 1379 154813.6 1374 1421 12146 12196 -0.41 1393 1381 155213.7 1376 1423 12281 12327 -0.37 1396 1383 155513.8 1378 1426 12417 12458 -0.33 1399 1385 155813.9 1379 1429 12552 12588 -0.29 1402 1387 1563

14 1381 1433 12688 12719 -0.24 1406 1390 156714.1 1382 1438 12825 12851 -0.20 1411 1393 1573

12


April 19, 2004

Time(min)

00.10.20.30.40.50.60.70.80.9

11.11.21.31.41.51.61.71.81.9

22.12.22.32.42.52.62.72.82.9

33.13.23.33.43.53.63.73.83.9

44.14.24.34.44.54.64.7

Furnace Cold Cold ColdProbe Side Side Side Lab

#4 #1 #2 #3 Ambient(°F) (°F) (°F) (°F) (°F)

65 67 67 67 7065 67 66 66 7067 67 67 67 6969 67 66 66 7073 67 67 66 6980 67 67 66 6989 67 67 66 69

100 67 67 66 69116 67 67 67 69136 67 67 67 69160 67 67 66 69190 67 67 66 69222 67 67 66 69254 67 67 67 69285 67 67 67 69313 67 67 67 69341 67 67 67 69365 67 67 67 69388 67 67 67 69409 68 68 67 70427 68 68 67 70444 68 68 68 69460 68 69 68 70475 69 69 69 70488 69 70 69 70501 70 71 70 70514 70 72 71 70526 71 73 72 70538 71 74 73 70550 72 76 74 70561 73 77 75 70571 74 78 76 70582 75 80 78 70593 76 82 80 70605 77 83 81 70618 78 85 83 70631 79 87 85 70645 80 89 87 70661 82 91 89 70678 83 93 91 70695 85 94 93 70714 86 96 94 70732 87 98 97 70751 89 100 99 70770 90 102 101 70789 92 104 103 70806 93 106 105 70824 95 108 107 70

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April 19, 2004

Time(min)

4.84.9

55.15.25.35.45.55.65.75.85.9

66.16.26.36.46.56.66.76.86.9

77.17.27.37.47.57.67.77.87.9

88.18.28.38.48.58.68.78.88.9

99.19.29.39.49.5


#4 #1 #2 #3 Ambient(°F) (°F) (°F) (°F) (°F)

840 97 110 109 69857 98 111 111 70873 100 113 113 69888 102 115 115 69903 104 117 117 69917 105 119 119 70931 107 120 121 70945 109 123 123 70958 112 124 124 70971 113 126 126 70984 115 128 128 70996 117 130 130 69

1008 120 131 132 691019 121 133 134 701030 123 135 136 701040 125 137 138 701050 127 139 141 701059 129 141 144 701068 131 142 147 701077 132 147 149 701085 134 151 153 701093 136 154 156 701101 138 156 160 701109 139 161 164 691116 141 165 168 701124 143 167 171 701131 145 168 175 701138 146 165 179 701145 148 171 182 701151 150 179 186 701157 152 186 188 701163 154 192 191 701170 156 197 193 701176 159 200 195 701182 163 205 197 701187 167 210 198 701193 173 211 200 701199 180 214 201 701204 188 215 202 701210 195 211 204 701215 200 208 205 701220 204 211 206 701224 207 216 207 701229 209 214 208 701234 210 210 209 701238 211 210 210 701242 212 210 211 701246 212 211 211 70

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April 19, 2004

Time(min)

9.69.79.89.910

10.110.210.310.410.510.610.710.810.9

1111.111.211.311.411.511.611.711.811.9

1212.112.212.312.412.512.612.712.812.9

1313.113.213.313.413.513.613.713.813.9

1414.1


#4 #1 #2 #3 Ambient(°F) (°F) (°F) (°F) (°F)

1250 213 211 212 701254 213 211 213 701258 214 211 213 701262 214 211 214 701266 214 211 214 701269 214 211 215 701273 214 212 215 701276 214 212 216 701279 214 212 217 701282 214 212 217 701285 214 212 219 701288 214 212 220 701291 214 213 221 691294 214 213 223 701296 214 213 225 691299 215 213 227 701301 215 214 230 701304 215 214 233 701307 216 215 237 701310 216 215 241 701312 217 217 246 701315 217 217 251 701317 218 219 257 701319 219 220 263 701321 220 223 270 701324 222 225 278 711326 223 228 286 701328 226 231 294 701330 228 234 303 701331 231 238 312 701333 233 242 321 701335 237 247 330 701337 240 252 340 701339 244 257 349 701341 249 263 359 701343 254 269 370 701345 259 276 383 701347 264 283 403 701350 270 291 424 701353 276 299 433 701356 282 308 446 701359 289 317 462 701362 296 326 477 701365 303 336 496 701369 311 346 512 701373 319 368 550 70

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APPENDIX C

PHOTOGRAPHS

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#1 Empty test frame with 36” x 36” opening

#2 Close-up of inside edge of test frame

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#3 3/4 in. plywood mounted in test frame

#4 3/4 in. plywood mounted in test frame

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#5 Exposed surface prior to mounting on furnace

#6 Top side unexposed surface with thermocouples in place

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#9 The top side (unexposed surface) first ignited after 10 minutes, 38 seconds. Thispicture was taken between 12 minutes, 15 seconds and 13 minutes, 17 seconds.

#10 The top side (unexposed surface) first ignited after 10 minutes, 38 seconds. Thispicture was taken between 13 minutes, 17 seconds and 14 minutes.

21


#11 Exposed surface after the test

#12 Top side (unexposed surface) after the test

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#13 Photo of char pattern

#14 Photo of char pattern

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ad hoc flame resistance test of 3/4 in. plywood · 2016. 3. 29. · project no. 16497-118553 april...

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