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v/\ U- - .> ,'Cr. q\ NATIONAL BUREAU OF STANDARDS REPORT NBS PROJECT 1002-30-10627 May 18 , 1962 NBS REPORT 7509 FIRE ENDURANCE TEST of TWO BULKHEAD ASSEMBLIES by J. V. Ryan and E. W. Bender for U. S. COAST GUARD (MPORTANT NOTICE NATIONAL BUREAU OF STAND intended for use within the Govi to additional evaluation and revie listing of this Report, either in w the Office of the Director, Nation however, by the Government age to reproduce additional copies fo •ess accounting documents Approved for public release by the ^ P ublished ]t ls subjected . . oduction, or open-literature Director of the National Institute of is obtained in writing from Standards and Technology (NIST) h permission is not needed, on October 9, 2015. ,ared if that a6Mt, wishes U. S. DEPARTMENT OF COMMERCE NATIONAL BUREAU OF STANDARDS

NATIONAL BUREAU OF STANDARDS REPORT...v/\ U--.>,'Cr.q\ NATIONALBUREAUOFSTANDARDSREPORT NBSPROJECT 1002-30-10627 May18 1962 NBSREPORT 7509 FIREENDURANCETEST of TWOBULKHEADASSEMBLIES

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Page 1: NATIONAL BUREAU OF STANDARDS REPORT...v/\ U--.>,'Cr.q\ NATIONALBUREAUOFSTANDARDSREPORT NBSPROJECT 1002-30-10627 May18 1962 NBSREPORT 7509 FIREENDURANCETEST of TWOBULKHEADASSEMBLIES

v/\

U- - .> ,'Cr.

q\

NATIONAL BUREAU OF STANDARDS REPORTNBS PROJECT

1002-30-10627 May 18, 1962

NBS REPORT

7509

FIRE ENDURANCE TEST

of

TWO BULKHEAD ASSEMBLIES

by

J. V. Ryan and E. W. Bender

for

U. S. COAST GUARD

(MPORTANT NOTICE

NATIONAL BUREAU OF STANDintended for use within the Govi

to additional evaluation and revie

listing of this Report, either in wthe Office of the Director, Nation

however, by the Government age

to reproduce additional copies fo

•ess accounting documents

Approved for public release by the ^ P ublished ]t ls subjected

. .oduction, or open-literature

Director of the National Institute of is obtained in writing from

Standards and Technology (NIST) h permission is not needed,

on October 9, 2015.,ared if that a6Mt, wishes

U. S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

Page 2: NATIONAL BUREAU OF STANDARDS REPORT...v/\ U--.>,'Cr.q\ NATIONALBUREAUOFSTANDARDSREPORT NBSPROJECT 1002-30-10627 May18 1962 NBSREPORT 7509 FIREENDURANCETEST of TWOBULKHEADASSEMBLIES
Page 3: NATIONAL BUREAU OF STANDARDS REPORT...v/\ U--.>,'Cr.q\ NATIONALBUREAUOFSTANDARDSREPORT NBSPROJECT 1002-30-10627 May18 1962 NBSREPORT 7509 FIREENDURANCETEST of TWOBULKHEADASSEMBLIES

Wim T£3I

Of

ms soito mmtkxmw

3* v. dyaa eng &* W* Bender

ABoTHaC?

two buX&heed assemblies wore subjectedto s standard fire test. 2fe» two differedonly in the nraalaal density of the ash* sto#snrlae boards as«4» hash served a® an effse-iirs barrier to fi&as &as*sug* for the full40 sianies af the wit. •. iccssslv* fesateraturerisi: os reached on the mis&pcuMHl surface ofx. .. ainei |2 ifc |tf c, ft feeaN *and on ta* nomine 1 3> lb yer on ft board at17*0 silo.

1* Introduction

it the r&^uest of ,e&d^ttart#fa ttJ. » Coast Guard

(ietttf of n arch I#2 f 1, Jf/il4.$0lA3, xj/l<fc.d&$A9;t¥o bulkhead specimens were subjected to fire test inco.’.v*. iXanct. with Jufepart 16^*w3~X(b’ of Spaalfioation forBulkhead Fanils for 3#refeaat fsstals*

2* dpeejUswu•-ash aseolfseh vas an assembly of two r laces of f/B in*

dfefat&isl; thick -.iariatte asbestos &arta* board, a saap—together tsetal Joint leather} *stai channels rm the tworortioal edges, amt -net#! base tethers end trim pieces.The details ars sho^a in figure X at the end of this report*The ^atarlal# mire receive* tbs Johns- -anvil 1* Jaap&ayhat marked to ladicat# that toe serine boards had beenaeaufastored at Seraistoa, *eotlaa& by larialte, . td* theparts, all y-rseut to sl*« f were raeelieA u&*s*aafel«" !

; Butthose for aae* s^eciaea tf*re individually vrs; red.

Th# two sgaeisiaas differed only ms to the nottin&l 4en-tities of the asbestos marine boards. &aeugfti pieces fortm s^celftsfia were received in good condition, fossureseatsmade on each pices prior to assembly indicated the fallowing

Page 4: NATIONAL BUREAU OF STANDARDS REPORT...v/\ U--.>,'Cr.q\ NATIONALBUREAUOFSTANDARDSREPORT NBSPROJECT 1002-30-10627 May18 1962 NBSREPORT 7509 FIREENDURANCETEST of TWOBULKHEADASSEMBLIES

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Page 5: NATIONAL BUREAU OF STANDARDS REPORT...v/\ U--.>,'Cr.q\ NATIONALBUREAUOFSTANDARDSREPORT NBSPROJECT 1002-30-10627 May18 1962 NBSREPORT 7509 FIREENDURANCETEST of TWOBULKHEADASSEMBLIES

- 2 -

doming 1

oensitv . ....Lengthm actual

densityib/fti —sir*— la* in* in* lb/ftd

32 30 94-7/8 16-15/16 *9ca 35-555 94-5/s 29-3A .931 36.2

36 30.5 94-15/16 36-31/32 .906 36.155 34-31/32 29-3/4 *920 36*6

.lean of i to 5 measurements of length and width, 10 to 20measurements of thickness.

In view of the unexpectedly high density of the nominal32 lb board, samples vere cat froa meh specimen after thefire test and their densities determined* the results failedto elearly indicate that the nominal 32 lb board had beenreceived with an abnormally high moisture content*

Data submitted by Johns- amville Company, on measurementsmade prior to cutting and shipping the pieces of board te thebureau, indicated "normal n and dry densities of 3k .

5

and33,2 ib/ftd for the nominal 32 lb board and i 3 ’ *234.9 lb/ftj for the nominal 36 lb board, the equilibriumrelative humidity and temperature of ‘the* attsoaphasra corres-ponding to normal were not identified* It appears logical toexpect that materials shipped by conventional transport wouldbe received in conditions more representative of normal thanof oven dry,

3 . lest dot-hod

the specimens were mounted in two openings of m testframe arranged to permit the simultaneous fire exposure ofthree bulkhead specimens in the wall test furnace, the thircopening was closed with an Insulated aetal panel. The space-between each vertical edge of each specimen and thv furnacefra.se was filled with mineral wool) the miner*! wool andmetal edge channel were covered with a fill* ; ef plaster onboth the exposed and unexposed surfaces*

Page 6: NATIONAL BUREAU OF STANDARDS REPORT...v/\ U--.>,'Cr.q\ NATIONALBUREAUOFSTANDARDSREPORT NBSPROJECT 1002-30-10627 May18 1962 NBSREPORT 7509 FIREENDURANCETEST of TWOBULKHEADASSEMBLIES

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Page 7: NATIONAL BUREAU OF STANDARDS REPORT...v/\ U--.>,'Cr.q\ NATIONALBUREAUOFSTANDARDSREPORT NBSPROJECT 1002-30-10627 May18 1962 NBSREPORT 7509 FIREENDURANCETEST of TWOBULKHEADASSEMBLIES

- 3

Light thermocouples were placed on the unexposed. surfaceof &ach specimen, distributee as shown in Figure 1, t'achthermocouple junction aaa several inches of its leal wireswere covered by a 6- by 6- by 0.4-in. felted asbestos fad,Twelve thermocouples, encased in porcelain insulators andiron pipes, were distributed within the furnace chamber.The furnace fuel was gas fro® the local municipal supply.The fuel flow was adjusted as necessary to produce averagefurnace temperatures aa close as feasible to those of thestandard time-1empcra ttire curve of a IT; 1-1X9* which include -

1000®F at 5 min, IJOO^F at 10 .©in, i5J»*F at 30 min, and1?00«F at 1 hr.

4, Hesuits

The test was conducted on larch 16, 1962 and vm witnessedby the following

t

Paul 01bs©a# USOtiRoger Hale, OcCOOeorge Putchi son, ari.aite Ltd** London, uplandIU 1. iatithA. J . 3tenor!Burt TowerJ. F. LynchH. A* fireehbow

So cracks developed through either spedmen during thetest. The joint members bowed slightly toward the fire inthe first few minutes but, after about 12 min, the jointmembers and maria® boards bowed, away from the fir®. The testwas stopped, at 1 hr.

Both, specimens remained effective barriers to flamepassage throughout the test ,

there? being no cracks in theunexposed surface, The limiting 250®T temperature riseat om thersBbcouple on the unerased surface of the asbestosmarine board was reached at 17.3 minates for the nominal32 lb per ca ft board specimen and at- 17.0 minutes for thenominal 36 lb f®p eu ft board specimen* The fire exposureseverity for the 1 hr test was 93*2 per cent. Additionaltemperature data are given in Figure 1. examination aftertest showed that the base stools had not- been deformed. Theonly metal deformations were sagging of the ceiling trimmembers and some warping of the exposed surface plates ofthe joint members.

Page 8: NATIONAL BUREAU OF STANDARDS REPORT...v/\ U--.>,'Cr.q\ NATIONALBUREAUOFSTANDARDSREPORT NBSPROJECT 1002-30-10627 May18 1962 NBSREPORT 7509 FIREENDURANCETEST of TWOBULKHEADASSEMBLIES

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Page 9: NATIONAL BUREAU OF STANDARDS REPORT...v/\ U--.>,'Cr.q\ NATIONALBUREAUOFSTANDARDSREPORT NBSPROJECT 1002-30-10627 May18 1962 NBSREPORT 7509 FIREENDURANCETEST of TWOBULKHEADASSEMBLIES

- 4 -

5. SaaBsary

The result* of the test lasttcatgd that both specimen^served ms effective barriers to flame., passage for i^hr, arid,

that the limiting temperature rise was reached at l/.o min

for the particular samples of nominal 32 lb per cm ft arinlte

board and at 17.0 min for the rarticular samples of nominal

36 lb per ea ft -.ariftite board used in the specimens.

neither the contents of this report nor the fact that

the test was made at the National harean. of Staimar^s snail

be used for advertising or promotional prpses,

TCl0230-22'i FH3612

Page 10: NATIONAL BUREAU OF STANDARDS REPORT...v/\ U--.>,'Cr.q\ NATIONALBUREAUOFSTANDARDSREPORT NBSPROJECT 1002-30-10627 May18 1962 NBSREPORT 7509 FIREENDURANCETEST of TWOBULKHEADASSEMBLIES

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Page 11: NATIONAL BUREAU OF STANDARDS REPORT...v/\ U--.>,'Cr.q\ NATIONALBUREAUOFSTANDARDSREPORT NBSPROJECT 1002-30-10627 May18 1962 NBSREPORT 7509 FIREENDURANCETEST of TWOBULKHEADASSEMBLIES

2400

Jo ‘3dnivd3dM3i

FIG.

I

-TEMPERATURE

DATA

AND

CONSTRUCTION

DETAILS

Page 12: NATIONAL BUREAU OF STANDARDS REPORT...v/\ U--.>,'Cr.q\ NATIONALBUREAUOFSTANDARDSREPORT NBSPROJECT 1002-30-10627 May18 1962 NBSREPORT 7509 FIREENDURANCETEST of TWOBULKHEADASSEMBLIES