ML20076K722

Fire-Stop Sys W/O Cable in 3 H Fire-Rated Wall

ML20076K722
Person / Time
Site:	LaSalle
Issue date:	09/06/1979
From:	Orals D, Quigg P UNITED STATES GYPSUM CO.
To:
Shared Package
ML20076K714	List: ML20076K715 ML20076K718 ML20076K722 ML20076K726 ML20076K730
References
NUDOCS 8307180065
Download: ML20076K722 (6)

Text

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t UNETED STATES GYPSUPli CCPRPANY 1000 East Northwest Highway / Des Plaines. l!!inois G0016 SESEARCH CENTER ARE A CODE 312 caiss smo FIRE-STOP SYSTEMS

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WITHOUT CABLE IN A 3-HOUR FIRE-RATED WALL

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ass,5 D. L. ORALS, PE SEPTEMBER 6, 1979 P. S. QUIGG, PE RESEliRCH ASSOCIATE MANAGER, STRUCTURAL &

FIRE TESTING  !

B307180065 830711 PDR ADOCK 05000373 O PDR

i l INTRODUCTION E)' Mrical power generating stations are fitted with appropriate fire barriers, such as thick reinforced concrete or concrete block I

walls to provide containment. However, it is often necessary to provide openings in these barriers in order for the plant to perform their function. Some of these openings may be designed for future use f

- where no penetrating devices are presently installed.

-This report covers a method that can be used to provide 3-hour fire containment for a large rectangular opening and small circular openings in a concrete b gpk wall.

CONSTRUCTION AUD MATERIALS 4

A wall of 8-inch thick, solid concrete block was constructed as shown in Figure 1. A rectangular opening, 48 inches wide by 24 inches high, was provided near the top of the wall and two, 6-inch and one 10-inch diameter openings were located near the bottom of the wall.

The openings were closed using successive layers of 4-inch THERMA-FIBER CT Felt (4 pcf density) compressed slightly and centered in the cavity. All the openings were then finished off with 2 inches of spray applied FIRECODE CT Gypsum on each face. The FIRECODE CT Gypsum 1- supplied in 40-pound bags was mixed with 55 to 60 pounds in a Carrousel Mixer and then combined with an accelerator at the nozzle during spray-ing to provide a set time of 10 to 15 minutes.

TEST PRCCEDURE The specimen was subjected to a fire programmed in accordance with the ASTM E119 time-temperature curve. Furnace temperatures were f monitored by eight thermocouples enclosed in protection tubes distri- l 1

• l buted throughout the furnace, located 6 inches from the wall.

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TEST RESULTS The fire endurance test was conducted on May 31, 1979, at the United States Gypsum Company Research Center. Following is a record of observed events as they occurred:

Time Observations 55 min Hairline cracks beginning to appear in FIRECODE CT Gypsum on exposed face .

1 hr 30 min Crack on exposed face of FIRECODE CT Gypsum in rectangular opening 1/8 inch wide and 12 inches long <>

2 hr Crack noted at 1 hr 30 min now 18 inches long and 1/4 inch wide 2 hr 30 min Same crack now open 3/8 inch 2 hr 45 min Same crack open 1/2 inch 3 hr Test terminated Immediately after the fire endurance test, the assembly was removed from the furnace and subjected to a 30 psi hose stream delivered through a 2-1/2-inch national standard playpipe equipped with 1-1/8-inch tip located 20 feet from the exposed face for 71 seconds. All the fire-stops withstood the hose stream and no passage of water was recorded on the unexposed surface. The hose stream duration was based on application to entire wall surface.

Area - 6 ft 9 in wide by 7 ft high - <47.25 ft Duration 1/2 min per 100 ft 150 sec 0.4725 = 71 see The system described in this report successfully resisted the passage of flame and hot gases during the 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> of ASTM E119 fire exposure.

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i TEST RESULTS (cont'd.)

The system when subjected to a 30 psi hose stream for 71 seconds as prescribed by ASTM E119 after the 3-hour firo exposure successfully resisted the passage of any water through the wall or openings.

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.> NORMAN L. SCOTT PE.sE i

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. - ARMAND H. GUST ATEitRO PE. sE ^

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LEsLIE D. M AR11H PE.SE GERALD E. GOET1 SCHE PE.SE

--consultants-C. RICH ARD N ASH AIA LOWELL YEREX Pr THE CONSULT lNG ENGlNEERS GROUP lNC.

1701 E. Lake Avenue + Glenview, Illinois (Chicago Suburb) 60025 312 729-064G July 24,1978 UNITED STATES GYPSUM COMPANY

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1000 East Northwest Highway Des Plaines, IL 60016 Gentlemen:

Attached is a report, "FIRECODErST GYPSUM THERMAFIBER ACCESS FIRESTOPPING FOR WALLS", by D. L. Orals and P. S. Quigg. The report describes a fire test conducted at the United States Gypsum Company Research Center on May,24,1978. I witnessed the test, studied the data, and edited,the report.

The purpose of the test was to determine the effectiveness of combinations of THERMAFIBER and FIRECODE CT GYPSUM used as firestops for cable penetrations through walls. The specimen consisted of an 8-in, concrete block wall with several openings. Cables were placed within two cable trays which penetrated through one opening, and aroups of three cables were placed through circular openings. The spaces within the openings arcund the cables were firestopped by various combinations of FIRECODE CT GYPSUM and THERMAFIBER.

One side of the wall was subjected to a standard (ASTM E119) fire exposure for more than three hours. Temperatures of the cables on the unexposed surface were monitored through-out the test, None of the cables ignited beyond the unexposed surface. After the fire test the fire-exposed surface was subjected to a 30-psi hose stream test. The FIRECODE CT GYPSUM remained in place but the THERMAFIBER around the cable trays was dislodged.

It is my judgment that the report pracant: the data accurately.

Respectfully submitted, da. #4%4xo Armand H. Gustaferro /

Registered Structural Engineer No. 2917 State of Illinois g.g . I. g

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