ML20195F223
| ML20195F223 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 03/13/1986 |
| From: | UNDERWRITERS LABORATORY, INC. |
| To: | |
| Shared Package | |
| ML20195F221 | List: |
| References | |
| NUDOCS 8606110197 | |
| Download: ML20195F223 (40) | |
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an independent, not-for-profit organization testingfor public safety File NC976 - Project 85NK31190 March 13, 1986 REPORT on FIRE TEST OF 3 H CURTAIN TYPE FIRE DAMPER UTILIZING ALTERNATE METHODS OF INSTALLATION Georgia Power Co. Waynesboro, GA Copyright C 1986 Underwriters Laboratories Inc. Underwriters Laboratories Inc. authorizes the above company to reproduce this Report provided it is reproduced in its entirety. In no event shall UL be responsible to anyone for whatever use or nonuse is made of the information contained in this report and in no event shall UL, the employees, or its agents incur any obligations or liability for damage, including, but not limited to, consequential damages arising out of or in connection with the use, or inability to use, the information contained in this report. 8606110197 860516 4 PDR ADOCK 0500 F Look For The & Listing or Classification Mark On The Product
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File NC976 Page G1 Issued: 3-13-86 EEEEEEh The subject of this Report is the fire test investigation of vertical mount fire damper assemblies with alternate methods of installation used in air conditioning and ventilating ducts and intended to protect openings in fire resistive walls. The sole purpose of this investigation was to provide exploratory test data, without conclusions, to Georgia Power Company for in-house design considerations. The test program consisted of constructing six fire damper assemblies and two reinforced concrete walls into which the dampers were installed. Each wall test assembly was subjected to a fire exposure with the furnace temperatures controlled in . accordance with the standard time-temperature curve outlined in the Standard, Fire Dampers and ceiling Dampers, UL 555. Following the fire exposure, each wall assembly was subjected to , the impact, erosion, and cooling effect of a water hose stream test. MRF /JSP :mjw lbry
File NC976 Page 1 Issued: 3-13-86 EEEEE1PTlqE FIRE DAMPER TEST SAMPLES: The fire dampers tested under this investigation were supplied by Air Balance Inc. and bore the UL Classification Mark for 3 h rated fire dampers. The construction details of the finished dampers were of a proprietary nature and are on file at the Laboratories. The sizes of dampers tested in Wall A (Test Record No. 1) and Wall B (Test Record No. 2) were as follows: Wall A Wall B Damper Damper Size Damper Damper Size - Tag No. W x H, in. Tag No. W x H, in. A-1500-S7-001 66 x 30 multiple A-1500-S7-004 36 x 36 single section assembly with two 33 x 30 sections A-1500-57-005 72 x 50 multiple assembly with four 36 by 25 sections A-1500-S7-001 36 x 60 multiple assembly with two 36 x 30 sections A-1500-S7-008 60 x 30 multiple assembly with two A-1500-S7-007 36 by 36 single 30 by 30 sections section The dampers were installed in sleeves by employees of the Zack Company, a contractor employed by Georgia Power Company. The sleeves were 24 in. deep, fabricated of 0.075 in, thick steel. Each sleeve was two L-shaped pieces, continuously welded at the opposite corners. The frames of the dampers were welded to the sleeves with 1 in. long welds spaced 7 to 7-1/2 in. on center around the perimeter of each damper frame, on each side. MRF/JSP:miw lbry
, File NC976 Page 2 Issued: 3-13-86 I TggT gggggg N g. 1 FIRE ENDURANCE AND HOSE STREAM TEST (WALL A): SAMPLES The three samples of fire damper submitted for testing in Wall A were as indicated above under " Fire Damper Test Samples". At the submittor's request, (1) all of the dampers were in the closed position for the start of the test, and (2) all dampers were mounted with the latch side toward the fire (see ILLS. 3 through 6) . TEST WALL A 12 in. thick concrete wall was prepared for the test. Three openings were located in the wall as specified by the submittor and as shown on ILL. 1. The sizes of openings provided for the dampers are shown below. Construction of the test wall was witnessed by members of the technical and engineering staff of Underwriters Laboratories Inc. and the Zack Co. Overall Damper Damper Size Wall Opening Size Opening No. Tag No. WxH, in. WxH, in. 1 A-1500-57-001 66 x 30 70 x 34 2 A-1500-57-001 36 x 60 40 x 64 5 A-1500-57-007 36 by 36 40 by 40 The overall dimensions of the concrete wall were 178 in, wide by 143 in. high. The wall was cast in sections on the floor of the construction area using wooden forms. The mating edges of the individual sections were keyed using male and female slots as shown on ILL. 8. Steel rods were placed on chairs to provide the required reinforcement as shown on ILL. 8. The dimensions of the individual concrete sections were as shown on ILL. 1. The ready-mixed concrete obtained from a local source consisted of one part Portland Cement, 2.15 part sand, and 3.2 parts gravel, by bulk volume, mixed with approximately 6 gal of water per bag of cement. The comprehensive strength and density of the concrete at 28 days, as determined from standard 6 in. diameter by 12 in, cylinders, averaged 4399 psi and 141.2 pcf, respectively. The average slump during placement was 5.1 in. MRF/JSP:miw lbry
, File NC976 Page 3 Issued: 3-13-86 After curing at ambient conditions for 14 days, the concrete sections were placed into the steel vertical test frame. The remaining 12 in. at the top of the frame was filled in with fire bricks. The sections were attached together by interlocking ~the keyed edges. Mortar was used along all joints. Along both vertical sides of the test frame, 2 in. of expansion clearance was left between the concrete wall and test frame. Structural steel angels, 3/8 in. thick, were welded to the test frame on both faces along the vertical cides to clamp the concrete wall in position; and mineral wool blanket insulation was placed to completely fill in the 2 in. expansion clearance on both sides.
The concrete wall was then force cured to obtain an acceptable moisture content (i.e, 75 percent maximum) for fire exposure. . When the curing was completed, a cementitious mixture was applied to the fire side of the wall along the two sides to protect the structural steel angles and steel test frame. SAMPLE INSTALLATION The samples of sleeved fire dampers were installed in the wall openings by employees of the Zack Co. The installation was witnessed by the technical and engineering staff of Underwriters Laboratories Inc. As indicated previously, at the request of the submittor, all dampers were mounted with the latch side toward
- the fire.
The three dampers were shimmed into the openings using 3 in. deep by 1/4 in. thick steel plates. The width of the plates was cut to fit the opening. The plates were welded to the damper sleeves with a 1-1/4 to 1-1/2 in. long weld on each side. The dampers were slid into the wall openings after attaching the shim plates. Clearances of 1/8 to 1/4 in existed between the shim plates and the wall opening in some places. The shims were located on all fcur sides of each damper, on the upstream and downstream faces, approximately 1/4 in, in from the face of the wall on both sides. The dampers in opening Nos. 1 and 2 were retained in position using No. 10 gauge steel cover plates welded to the damper sleeves only on both faces of the openings, as shown on ILLS. 3 and 4. Each cover plate was formed from four pieces of 3-1/2 in, wide steel plates which were continuously welded to each other at the four corners. The cover plates were welded to the damper sleeves with 2 in. long welds spaced 5 in. on center, with one weld at each corner. MRF/JSP:mjw lbry
File NC976 Page 4 Issued: 3-13-86 The damper in opening No. 5 was retained in position using a No. 10 gauge steel cover plate on the nonfire side and a Type 93 support on the fire side. The cover plate was same as described above. The Type 93 support consisted of structural steel angles welded to the damper sleeve along four sides and to 1/2 in. thick steel plates which were anchored into the concrete wall at the top and bottom of the opening, as shown on ILLS. 4 and 7. Four of the structural steel angles, 3 by 4 by 3/8 in, thick, were welded to the four sides of the sleeve using 2 in. long welds spaced 5 in. OC with one weld at each corner. The four angles were also continuously welded to each other at the four corners. A 9 in, high by 44 in, long by 1/2 in. thick steel plate was anchored into the concrete wall at the top and bottom of the , opening using 1/2 in, diameter "Hilti Bolt" expansion shell anchors spaced 5 in. OC. The anchors penetrated 2-1/2 in. minimum into the concrete. The structural angles were welded to these plates with 2-1/2 in, long welds spaced approximately 4-1/2 in. OC, with one weld at each corner. METHOD The fire endurance and hose stream test was conducted in accordance with the Standard of Underwriters Laboratories Inc. for Fire Dampers and Ceiling Dampers, UL 555. Prior to the test, each damper section was cycled at least three times by the submittor to verify proper operation of the dampers. The fire damper assemblies previously described were subjected to the test with all dampers in the closed position at the start of the test as requested by the submittor and indicated previously in this Report. The appearance of the unexposed and exposed faces of the test assembly prior to the test are shown on ILLS. 10 and 11, respectively. The appearance of the unexposed and exposed faces of the test assembly after the test is shown on ILLS. 13 and 14, respectively. The furnace temperatures were measured with twelve thermocouples symmetrically located in the furnace with the junction of the thermocouple located 6 in, from the exposed face of the, test assembly. Throughout the fire test, observations were made of the character of the fire and its control, the conditions of the exposed and unexposed faces, and all developments pertaining to the performance of the damper as a fire barrier. MRF/JSP:mjw lbry
File NC976 Page 5 Issued: 3-13-86 Immediately following the fire exposure, the test assembly was withdrawn from the furnace and subjected to the impact, erosion and cooling effects of a 45 psi hose stream for 5 min, - 13 s, as specified in the Standard for a 3 h rating. RESULTS Observations During Fire Test - The fire was luminous and well-distributed during the fire test. The temperatures recorded within the furnace chamber with respect to the Standard Time-Temperature Curve are shown on ILL. 12. The pressure within the furnace was maintained as nearly equal to atmospheric pressure as possible. , The observations on the unexposed side (unless noted otherwise) were as follows: l l l l MRF/JSP:m3w j lbry L
File NC976 Page 6 Issued: 3-13-86 Fire Exposure Time, h-min Observations 0-3 Blades were swaying within the frame guide channels. 0-5 Edges of sleeves were warping on nonfire side. 0-10 Blades in top damper assembly were still
; swaying within the guide channels. Swaying of the blades in the other dampers had nearly ceased. Slight buckling of the frame .
at the bottom of the bottom right damper section was noted. No moisture was yet visible from the concrete. 0-13 The corners of the cover plates were warping away from the wall by 1/4 in. maximum. 0-15 The galvanized coating in the top damp'er had started to melt. The cover plates were also warping away from the wall on the fire side. The clearance between the blades and frame in the top damper sections had decreased slightly. 0-17 The galvanized coating of the blades in the top section of the bottom right damper assembly had started to molt. The bottom halves of the blades in the top damper sections were still swaying within the guide channels. 0-22 The galvanized coating in the bottom section of the bottom right damper assembly had started to melt. There was still no moisture evident from the concrete. 0-25 The cover plates were pulled away from the wall on the fire side by a maximum of 1 in. 0-30 Blades in the top damper sections were beginning to turn red; there was still some cwaying of the blades evident in the left SOCtion. MRF/JSP:mjw lbry
File NC976 Page 7 Issued: 3-13-86 Fire Exposure Time, h-min Observations 0-37 The blades in the top right section of the bottom multiple assembly were starting to turn red. 0-45 Steam was being emitted from the grout at
; the top center of the concrete wall, i
There were no changes noted in the fire dampers. 1-25 Blades in the top dampers were turning . cherry red. Water was seeping from the concrete in a couple of places. The blade to frame clearance had decreased in all dampers and was very small in some places. 1-45 The bottom blades in the top damper sections were pulled in toward the fire by about 3/8 in. maximum at the center of the blade widths. Both sections were tightly closed however. 2-0 Water was continuing to seep from the concrete. No changes were noted in the dampers. 2-15 The blades in the bottom left single section were turning red. 2-45 No changes were noted in the dampers. They were all tightly closed. 3-0 Furnace fire was extinguished. HOSE STREAM TEST: l l METHOD i Immediately after the 180 min fire exposure, the test assembly was withdrawn from the furnace and subjected to the impact *, erosion and cooling effects of the 45 psi hose stream for 5 min, 13 s as specified in the test standard for a 3 h fire exposure. MRF/JSP:mjw lbry
File NC976 Page 8 Issued: 3-13-86 RESULTS During application of the hose stream, all damper sections remained closed and normal amounts of water passed through the assemblies between the blade to frame clearances. The damper frames and sleeves had buckled to result in clearances of approximately 1/8 in. maximum between the frames and sleeves. These clearances extended through the entire wall thickness when viewing the assembly at various angles (i.e., approximately 5 to 10* from the vertical plane). The maximum clearance of 1/8 in, was noted in the bottom right multiple damper assembly. There were no visible through openings when . viewing perpendicular to the mounting plane. MRF/JSP:mjw lbry
, File NC976 Page 9 Issued: 3-13-86 ISSI gggggg N g. 2 FIRE ENDURANCE AND HOSE STREAM TEST (WALL B):
SAMPLES The three samples of fire damper submitted for testing in Wall B were as indicated in the preceding section " Fire Damper Test Samples". At the submittor's request, (1) all dampers were in the closed position for the start of the test, and (2) all dampers were mounted with the latch side toward the fire. TEST WALL . A 12 in. thick concrete wall was prepared for the test. Three openings were located in the wall as specified by the submittor and as shown on ILL. 2. The sizes of openings provided for the test dampers are shown below. Construction of the test wall was witnessed by members of the technical and engineering staff of Underwriters Laboratories Inc. and the Zack Co. Overall Wall Damper Damper Size Opening Size Opening No. Tag No. W by H, in. W by H , in. 3 A-1500-S27-004 36 by 36 40 by 40 4 A-1500-S7-005 72 by 50 76 by 54 6 A-1500-S7-008 60 by 30 64 by 34 i The overall dimensions of the concrete wall were 178 in. wide by 143 in, high. The wall was cast in sections on the floor of the construction area using wooden forms. Opening Nos. 3 and 4 were frumed with 4 by 3 by 3/8 in, thick steel angles embedded into the wall on the fire side only, as shown on ILLS. 5 and 6. i These angles were located during casting of the concrete sections; they were provided with 1/2 in. diameter steel expansion anchors for embedment into the concrete as shown on ILL. 5. The design, reinforcement, and dimensions of the individual concrete sections are shown on ILL. 9. The ready-mixed concrete was the same as described in Test Record No. 1. The con.prehensive strength and density of the concrete at 28 days, as determined from standard 6 in. diameter by 12 in. cylinders, averaged 3981 psi and 142 pcf, respectively. , The average slump during piccoment was 6 in. MRF /JSP :miw lbry
File NC976 Page 10 Issued: 3-13-86 After curing at ambient conditions for 12 days, the concrete sections were placed in the steel vertical test frame in the same manner as described in Test Record No. 1. The 69 by 79 in, section of concrete with no opening was cut in two pieces to ease placement into the test frame. SAMPLE INSTALLATION The samples of sleeved fire dampers were installed in the wall openings by employees of the Zack Co. The installation was witnessed by the technical and engineering staff of Underwriters Laboratories Inc. As indicated previously, at the request of the submittor, all dampers were mounted with the latch side toward , the fire. The three dampers were shimmed into the openings using 3 in. deep by 1/4 in. thick steel plates,in the same manner as described in Test Record No. 1 and as shown on ILLS. 6 and 7. The location of the shim plates on the fire side of the opening was as shown on ILLS. 6 and 7. The dampers in opening Nos. 3 and 4 were retained in position using No. 10 gauge steel cover plates on the nonfire side and Type 84 supports on the fire side. The cover plates were constructed and attached in the same manner as described in Test Record No. 1, and as shown on ILLS. 4 through 7. The Type 84 support consisted of steel angles, 3/8 or 1/2 in, thick, welded to the damper sleeves and embedded angles along all four sides with 1 in. long welds spaced 5 in. OC, with one weld at each corner, as shown in ILLS. 5 and 6. METHOD The fire endurance and hose stream test was conducted in accordance with the Standard of Underwriters Laboratories Inc. for Fire Dampers and Ceiling Dampers, UL 555. Prior to the test, each damper was cycled at least three times by the submittor to verify proper operation of the dampers. The fire damper assemblies, previously described, were subjected to the test with all dampers in the closed position at , the start of the test as indicated previously in this Report. The appearance of the unexposed and exposed faces of the test assembly prior to the test are shown on ILLS. 15 and 16, respectively and after the test on ILLS. 19 and 20. MRF/JSP:mjw lbry
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File NC976 Page 11 Issued: 3-13-86 The furnace temperatures were measured with twelve thermocouples symmetrically located in the furnace with the junction of the thermocouple located 6 in, from the exposed face of the test assembly. - Throughout the fire test, observations were made of the character of the fire and its control, the conditions of the , exposed and unexposed faces, and all developments pertaining to the performance of the d ,er as a fire barrier. Immediately following the fire exposure, the test assembly was withdrawn from the furnace and subjected to the impact, erosion and cooling effects of a 45 psi hose stream for 5 min, . 59 s, as specified in the Standard for a 3 h rating. RESULTS i Observations During Fire Test - The fire was luminous and well-distributed during the fire test. The temperatures recorded within the furnace chamber with respect to the Standard , Time-Temperature Curve are shown on ILL. 17. The pressure within the furnace was maintained as nearly equal to atmospheric pressure as possible.
, The observations on the unexposed side (unless noted otherwise) were as follows:
Fire Exposure Time, h-min Observations 0-5 Slight buckling of the frames along the mullion joints in opening No. 4 was noted. The edges of the sleeve were wavy. The blades were swaying the guide channels of the frames. 0-10 The galvanized coating of the-blades in the top damper had melted. 0-20 The edges of the cover plate along the top and bottom of the top damper were wavy. The galvanized coating in the top sections in opening No. 4 had started to melt. The blade to frame clearances had decreased; only the blades in the top damper assembly were swaying within the guides. MRF/JSP:m1w lbry
File NC976 Page 12 Issued: 3-13-86 Fire Exposure Time, h-min Observations 0-45 Steam was being emitted from the mortar - joints in the top half of the wall. Cracks were evident along the mortar joints. The top damper sections were beginning to turn red.
$-53 Water was seeping from the concrete wall in three places. No changes were observed in the dampers.
1-0 The damper sections in the top half of opening No. 4 were starting to turn red. All dampers were closed tightly. The blades in the top left section were still swaying slightly within the guides. 1-15 The top sections in opening No. 4 were red hot. No other changes noted. 2-0 All blades had become tight within the frames, there was no further swaying within the guides. Steam was still being emitted from the concrete. 2-45 There were no changes noted. 3-0 Furnace fire was extinguished. HOSE STREAM TEST: METHOD Immediately after the 180 min fire exposure, the test assembly was withdrawn from the furnace and subjected to the impact, erosion and cooling effects of the 45 psi hose stream for 5 min, 59 s. The appearance of the exposed side of the test assembly after the fire exposure and before application of the hose stream is shown on ILL. 18. RESULTS 1 During application of the hose stream, all damper sections remained closed and normal amounts of water passed through the assemblies between the blade to frame clearances. MRF/JSP:miw lbry
i File NC976 Page 13 Issued: 3-13-86 The damper frames and sleeves had buckled to result in visible through openings when viewing perpendicular to the mounting plane in the magnitude of 1/8 to 1/4 in., in a.11 three dampers. A 3/8 in. visible through opening was also evident at the top of the multiple damper assembly in opaning No. 4. 'f 4 1 i 4 i I i l l 1 i l l i i MRF/JSP:mjw j lbry
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. File NC976 Page 14 Issued: 3-13-86 gyMMAR1 The following summary is based upon the results of the examination of the tests presented in this Report as they relate to established principles and previously recorded data.
FIRE RETARDANT PROPERTIES: The dampers remained closed and latched for the entire fire exposure period, in both Wall A (Test Record No.1) and Wall B (Test Record No.2) . The dampers and their installations remained securely . positioned in the wall openings during the fire endurance tests. There were no visible through openings observed in any of ' the damper installations during the fire endurance tests in both Test Record Nos. 1 and 2. The clearances developed between parts on the nonfire side of the test assemblies did not exceed 1/8 in. during the two fire exposures. HOSE STREAM RESISTANCE: All damper installations remained securely positioned in the wall during both hose stream tests. In Test Record No. 1, there were no visible through opening apparent through the damper installations when viewing perpendicular to the mounting plane. The warping of the damper frame and sleeve had resulted in clearances between parts which extended through the entire wall thickness, when viewing at approximately 5 to 10' from the vertical plana. A maximum clearance of 1/8 in, was noted in one place in the bottom right multiple assembly. In Test Record No. 2, visible through openings developed between the damper frames and sleeves in all three installations. When viewing perpendicular to the mounting plane, these openings varied from 1/8 to 1/4 in. One 3/8 in. visible through opening was noted at the top of the four section multiple damper assembly. In all installations, warping of the cover-plates and the Types 84 and 93 supports was minimal. All installations and fasteners remained intact. MRF /JSP :miw lbry
File NC976 Page 15 Issued: 3-13-86 In no event shall UL be responsible to anyone for whatever use or nonuse is made of the information contained in this Report and in no event shall UL, the employees, or its agents incur any obligations or liability for damage, including, but not limited to, consequential damages arising out of or in connection with the use or inability to use, the information contained in this Report. The issuance of this Report in oc way implies Classification or other recommendation by UL and does not authorize the use of UL Classification Marks or other reference to UL on or in connection with the product or system. Report by: Reviewed by: 6Zbf MARGARET FIGUEROA 'J. S. PARIKH Senior Project Engineer Senior Project Engineer Fire Protection Department Fire Protection Department MRF/JSP:mjw lbry
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