Report Number BTC 6F A FIRE RESISTANCE TEST ON A 5m HIGH X m WIDE GYPROC SHAFTWALL SYSTEM INCORPORATING A 6mm METAL STUD FRAMEWORK CLAD WITH A DOUBLE LAYER OF 5mm GYPROC FIRELINE, EXPOSED TO THE FIRE FROM THE SHAFT SIDE. CONDUCTED IN ACCORDANCE WITH BS EN :999. Test Date: 7 th September www.btconline.co.uk Customer: Leicestershire LE 6HX Customer: BTC 6F: Page of 7
A FIRE RESISTANCE TEST ON A 5m HIGH X m WIDE GYPROC SHAFTWALL SYSTEM INCORPORATING A 6mm METAL STUD FRAMEWORK CLAD WITH A DOUBLE LAYER OF 5mm GYPROC FIRELINE, EXPOSED TO THE FIRE FROM THE SHAFT SIDE. CONDUCTED IN ACCORDANCE WITH BS EN :999. TABLE OF CONTENTS FOREWORD REPORT AUTHORISATION TEST CONSTRUCTION 4 TEST MATERIALS 7 Gyproc Boards 7 Metal Components 7 Fasteners 8 Jointing Material 8 TEST PROCEDURE 9 TEST RESULTS 9 LIMITATIONS TEST DATA Observations Furnace Temperature Graph 4 Unexposed Face Temperature Graph 5 Pressure Graph 6 Unexposed Face Layout 7 Exposed Face Board Layout 8 Unexposed Face Standard Five Temperature Data 9 Additional Unexposed Face Temperature Data Additional Internal Temperature Data 8 Specimen Lateral Deflection PHOTOGRAPHS 5 Customer: BTC 6F: Page of 7
FOREWORD This test report details a fire resistance test conducted on a shaftwall partition system. The test sponsor was. The test specimen was installed by British Gypsum. The construction of the specimen took place on the th September. designed and selected the materials comprising the test specimen. The test date was the 7 th September. This report details the method of construction, the test conditions and the results obtained when the specific element of construction described herein was tested following the procedures outlined in EN 6, and where appropriate EN 6. Any significant deviation with respect to size, constructional details, loads, stresses, edge or end conditions other than those allowed under the field of direct application in EN is not covered by this report. Because of the nature of fire resistance testing and the consequent difficulty in quantifying the uncertainty of measurement of fire resistance, it is not possible to provide a stated degree of accuracy of the result. REPORT AUTHORISATION Report Author Authorised by Brian Willson Test Report Writer Eur Ing. Paul Howard BSc. (Hons.), CEng., MIOA Head of Laboratory will not discuss the content of this report without written permission from the test sponsor. retains ownership of the test report content but authorises the test sponsor to reproduce the report as necessary in its entirety only. Customer: BTC 6F: Page of 7
TEST CONSTRUCTION The specimen was constructed in a refractory concrete lined steel restraint frame having an opening of 5mm high x mm wide. A continuous Glasroc FS FireStrip was applied to the centreline of a Gypframe 6mm Shaftwall J channel (6JC7). The channel was then fixed to the head of the restraint frame aperture using 6mm Hilti Hus fixings at mm centres (long flange to exposed face). Gypframe 6mm Shaftwall floor channel (6C5) was fixed to the base of the restraint frame aperture using 6mm HiltiHus fixings at 6mm centres. Gypframe 6mm Shaftwall starter channel (6SC) was fixed to the left hand side of the restraint frame aperture (viewed from the unexposed face) using HiltiHus fixings at 6mm centres. The starter channel was cut short by 5mm to accommodate the designed deflection. A 6mm Gypframe 6I7 stud (cut short by 5mm) was positioned between the head and base channels adjacent to the right hand side of the restraint frame aperture (viewed from the unexposed face) but not fixed. A 5mm Rockwool Firebatt gasket was inserted between the channel and the restraint frame. The stud was tabbed to gain a height of 5m i.e. the flanges of an I stud were trimmed leaving a mm flat web extension which was then fixed to an adjoining I stud with 4 Gypframe wafer head screws. The Tab was positioned 6mm from the base of the stud. 6mm Gypframe 6I7 studs (cut short by 5mm) were positioned between the head and base channels at 6mm centres. The studs were tabbed to gain a height of 5m. The Tab was positioned 6mm from the base of the stud. One layer of 9mm Gyproc CoreBoard (also cut 5mm short at the head) was inserted into spaces between the studs. The Core board was secured in position with Gypframe G retaining channel inserted into the spaces between the board and the stud flanges. Horizontal CoreBoard joints were 5mm and mm from the base. Two mm Gyproc CoreBoard fire stops, comprising two layers of 9mm Gyproc CoreBoard 6mm wide, were pushed fully up into the web of the head channel and fixed using two mm Gyproc Drywall screws for each 6mm wide pair through the head channel flange. mm fire stops were fixed to Gypframe GA angle sections (inserted into the horizontal board joints) using three mm Gyproc Drywall screws per fire stop, plus beads of sealant top and bottom. Customer: BTC 6F: Page 4 of 7
Gyproc Sealant was applied in the angle formed by the restraint frame and the head channel on the unexposed face. An inner layer of 5mm Gyproc Fireline was fixed to the unexposed face to all framing members (except the head channel) at mm centres using mm Gyproc Drywall screws (horizontal joint was positioned mm from the base). An outer layer of 5mm Gyproc Fireline was fixed to the unexposed face to all framing members (except the head channel) at mm centres using mm Gyproc Drywall screws (horizontal joint was positioned mm from the base). Gypframe GFS Fixing strap was used to back the outer layer horizontal joint. The outer layer board joints were finished with Gyproc joint tape and Gyproc joint filler. All screw heads were spotted with Gyproc joint filler. Customer: BTC 6F: Page 5 of 7
a) Single layer of 9mm Gyproc CoreBoard. b) Gyproc Drywall screw. c) Gypframe G retaining channel. d) Gypframe 6I7 stud. e) 9mm x mm Gyproc CoreBoard firestop. f) Double layer of 5mm Gyproc Fireline. Figure. Crosssection through the partition. The descriptions of individual components making up the test specimen were provided by the customer and were checked for accuracy wherever possible. Customer: BTC 6F: Page 6 of 7
TEST MATERIALS Gyproc Boards (i) Nominally, mm (long) x 8mm (wide) x 9mm (thick), Gyproc CoreBoard manufactured and supplied by ex Robertsbridge Works. Measured surface density: 6. kg/m. Measured thickness: 9.75 mm. Board identification numbers: 4 :8 Measured moisture content:.% (ii) Nominally, mm (long) x mm (wide) x 5mm (thick), Gyproc Fireline (T/E) manufactured and supplied by ex Robertsbridge Works. Measured surface density:.7 kg/m. Measured thickness: 4.9 mm. Board identification numbers: 4 :6 Measured moisture content:.8% The surface density and board thickness were calculated using the actual weight and size of a selection of boards used in the test specimen. The moisture content of the board was determined using samples dried to a constant weight in an oven at 4 o C. Metal Components (i) (ii) (iii) (iv) (v) (vi) (vii) Gypframe 6JC7 J Channel. Nominally.7mm thick, manufactured from galvanised mild steel. Gypframe 6C5 Channel. Nominally.5mm thick, manufactured from galvanised mild steel using the Ultrasteel process. Gypframe 6SC Starter Channel. Nominally.mm thick, manufactured from galvanised mild steel. Gypframe 6I7 Stud. Nominally.7mm thick, manufactured from galvanised mild steel. Gypframe G Retaining Channel. Nominally.5mm thick, manufactured from galvanised mild steel using the Ultrasteel process. Gypframe GA Steel Angle. Nominally.7mm thick, manufactured from galvanised mild steel. Gypframe GFS Fixing Strap. Nominally.5mm thick, manufactured from galvanised mild steel. All metal components supplied by. Customer: BTC 6F: Page 7 of 7
Fasteners (i) (ii) (iii) (iv) mm Gyproc Drywall screws supplied by. mm Gyproc Drywall screws supplied by. 6mm Hilti Hus fixings supplied by Hilti Limited. mm Gypframe Wafer head screws supplied by. Jointing Material (i) (ii) Gyproc Joint Filler supplied by. Gyproc Paper Tape supplied by. Customer: BTC 6F: Page 8 of 7
TEST PROCEDURE The test was conducted fully in accordance with BS EN :999. The specimen was subjected to fire from one side, as specified in BS EN :999. The test specimen was not symmetrical and should therefore be tested in both orientations. No performance can be claimed for the partition system if installed with the corridor side exposed to the furnace, without a separate test being undertaken to substantiate this orientation. The test procedure used was EN Issue. The ambient temperature at the commencement of the test was 9 o C. The furnace pressure head was located at a height of metres and the pressure was maintained at ± Pa positive with respect to the atmosphere, except during the first 5 minutes of the test and at 4 8 and minutes. The test conditions did not meet the full requirements of BS EN 6:999 as the furnace linings and test frame stiffness did not fully comply. The test centre is of the opinion that these deviations from the documented method will not unduly effect the result of the test. TEST RESULTS The requirements of the standard were satisfied for the following periods: Integrity: Insulation: minutes No Integrity failure. (The test having been discontinued at the request of the sponsor) 8 minutes (Roving thermocouple exceeded 8 deg C.) The test was terminated at minutes. Customer: BTC 6F: Page 9 of 7
LIMITATIONS The results only relate to the behaviour of the specimen of the element of construction under the particular conditions of test; they are not intended to be the sole criteria for assessing the potential fire performance of the element in use nor do they reflect the actual behaviour in fires. The specification and interpretation of fire test methods are the subject of ongoing development and refinement. Changes in associated legislation may also occur. For these reasons it is recommended that the relevance of test reports over 5 years old should be considered by the user. The laboratory that issued the report will be able to offer, on behalf of the legal owner, a review of the procedures adopted for a particular test to ensure that they are consistent with current practices, and if required may endorse the test report. Customer: BTC 6F: Page of 7
TEST DATA Observations Observers: Unexposed face M Fountain Exposed face L Cooper hrs Observations mins Observations to be read in conjunction with figure 6. All observations refer to the exposed face unless otherwise stated. Test Started 6 Stud flanges slightly rippled. Horizontal joints open to approximately mm. Rippling of stud flanges increased. Horizontal joints open to approximately 5mm. Stud between boards 9 and twisted at joint. 4 Horizontal joints open to approximately mm on left hand side decreasing to approximately mm on right hand side. 5 Horizontal joints 6/ and 7/ open to approximately mm. Centre board No 8 dropped onto board No. Cracks developed up to 5mm long on both ends. Horizontal joints 9/4 and /5 open to approximately 5mm. 5 Horizontal joint 7/ open to approximately 5 mm. Horizontal joint 9/4 open to approximately 5mm. Partition touching plate thermometers at right hand side. Horizontal joint 6/ open to approximately 4mm. Horizontal joints 7/, 8/ and 9/4 closed. Horizontal joint /5 open to approximately 5 5mm. Hairline cracks on all boards. Customer: BTC 6F: Page of 7
Observations hrs mins Observations to be read in conjunction with figure 6. All observations refer to the exposed face unless otherwise stated. Unexposed face Bonding coming away from fixed end. Left hand boards, discolouration at centre of horizontal joint. Upper right hand board, crest at right hand side of board producing crack approximately 6mm above horizontal joint. 5 Unexposed face Slight discolouration at both horizontal/vertical joint junctions. 8 Unexposed face Screw head discolouration at right hand vertical joint. 9 Unexposed face Screw head discolouration at left hand vertical joint. Top of board sagging into furnace by approximately mm at horizontal joint. Unexposed face Lower left hand board, screw heads pulled through in field of board. 5 Stud and left hand side of board open to approximately 5mm, between approximately 5mm and 8mm height. 4 Board No. 8 fallen. Unexposed inner layer horizontal joint open to approximately 5mm. Unexposed inner layer boards, crazed. Board No. 7 fallen. Board No. slipped down within studs. Retaining channel bowing out of metal studs where exposed and bowed. Customer: BTC 6F: Page of 7
Observations hrs mins Observations to be read in conjunction with figure 6. All observations refer to the exposed face unless otherwise stated. Unexposed face INSULATION FAILURE. Temperature rise on Roving exceeded 8 o C at midspan of left hand board horizontal joint. Lower centre board, T shape discolouration at midspan approximately mm height. 5 Board Nos. 6 and 9 fallen. Unexposed inner layer horizontal joints: Left hand board joint open approximately 5 mm on left increasing to approximately 5mm on right. Centre board joint open approximately mm on left decreasing to approximately 5mm on right. 5 Unexposed face Horizontal joint, glow visible mm right of midspan of specimen. Unexposed face Upper and lower centre boards, T shape discolouration extended almost total height of specimen forming a cross. Unexposed face Glow visible at head of specimen. Board fall unexposed inner layer, right hand side of upper left hand board and left hand side of upper centre board have fallen. TEST TERMINATED. Customer: BTC 6F: Page of 7
Furnace Temperature Graph Temperature C 8 6 4 6 9 Mean Furnace Temp minutes Specified Furnace Temp Figure. Furnace temperature graph Customer: BTC 6F: Page 4 of 7
Unexposed Face Temperature Graph 5 4 Temperature C 6 9 Mean St5 Temp minutes Max Unexposed Temp Figure. Unexposed face temperature graph. Customer: BTC 6F: Page 5 of 7
Pressure Graph 5 Pressure Pa 5 6 9 5 minutes Figure 4. Pressure graph. Customer: BTC 6F: Page 6 of 7
Unexposed Face Layout 5mm down and 5mm in from vertical joint 5mm down at midwidth of specimen 5mm down at centre of stud 5 6 7 Exposed Face Internal s at 75mm height Left Stud Right Stud 6 9 Standard Five Standard Five 5mm from horizontal joint at midwidth of specimen 8 9 5mm from horizontal 5mm from vertical joint Unexposed Face 5mm from fixed edge and at midheight of the specimen 5mm from vertical joint at midheight of specimen Centre of stud at midheight of specimen mm from free edge at midheight of the specimen Standard Five Exposed Face Internal s at 5mm height Left Stud Right Stud Standard Five Standard Five 4 Unexposed Face Free end Figure 5. Unexposed face thermocouple layout. Customer: BTC 6F: Page 7 of 7
Exposed Face Board Layout Figure 6. Exposed face board layout. Customer: BTC 6F: Page 8 of 7
Unexposed Face Standard Five Temperature Data (mins) 4 5 6 7 8 9 4 5 6 7 8 9 4 5 6 7 8 9 4 5 6 7 8 Temperature Rise ( o C) No. No. 4 5 6 7 8 9 4 5 7 7 9 4 4 6 7 8 9 4 4 5 5 6 6 7 7 8 8 9 8 9 9 4 9 4 9 4 9 4 4 4 4 4 4 No. 4 6 8 5 8 5 7 9 4 5 6 7 8 8 9 9 4 4 4 4 No. 4 6 8 4 6 9 5 7 9 4 5 6 7 8 8 9 4 4 4 No. 4 4 5 7 9 4 6 9 5 8 9 4 5 6 7 8 9 9 4 4 4 Customer: BTC 6F: Page 9 of 7
(mins) 9 4 4 4 5 5 5 5 6 6 6 6 68 69 7 7 7 7 74 75 76 77 78 79 8 Temperature Rise ( o C) No. No. 4 4 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 No. 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 No. 4 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 No. 4 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 Customer: BTC 6F: Page of 7
(mins) 8 8 8 84 85 86 87 88 89 9 9 9 9 94 95 96 97 98 99 4 5 6 7 8 9 4 5 6 7 8 9 Temperature Rise ( o C) No. No. 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 68 7 68 7 69 7 7 7 7 74 75 75 78 76 8 76 8 78 85 79 86 79 88 8 89 8 9 8 9 No. 6 6 6 6 6 6 6 6 6 6 69 7 74 77 78 8 8 84 86 88 9 9 94 96 98 No. 6 6 6 6 6 6 6 6 6 68 69 7 7 75 78 8 8 84 86 88 9 9 No. 4 6 6 6 6 6 6 6 6 68 69 7 75 77 79 8 8 8 85 87 89 9 94 96 99 4 See figure 5 for thermocouple layout Customer: BTC 6F: Page of 7
Additional Unexposed Face Temperature Data (mins) 4 5 6 7 8 9 4 5 6 7 8 9 4 5 6 7 8 9 4 5 6 7 8 Temperature Rise (ºC) No. 5 No. 6 4 5 7 9 5 4 6 5 8 5 6 7 4 8 6 8 9 9 4 7 9 4 4 4 4 5 6 7 7 8 9 No. 7 5 6 8 5 7 9 4 5 7 9 4 5 7 8 4 4 4 4 4 No. 8 5 7 8 5 7 9 4 5 7 8 9 4 4 5 6 7 No. 9 5 8 5 8 6 7 9 4 4 4 4 No. 4 6 7 9 4 6 8 5 7 8 5 5 6 7 7 8 8 8 8 9 Customer: BTC 6F: Page of 7
Customer: BTC 6F: Page of 7 Temperature Rise (ºC) (mins) No. 5 No. 6 No. 7 No. 8 No. 9 No. 9 4 4 4 5 5 5 5 6 6 6 6 68 69 7 7 7 7 74 75 76 77 78 79 8 5 5 5 5 5 5 5 5 5 5 5 5 5 5 4 5 7 9 4 5 7 8 9 4 4 4 4 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 9 4 4 4 4 5 5 5 5 5 5 5 5 5 5 5 5 5 5 6 6 6 6 6 6 9 9 4 4 4 4 5
(mins) 8 8 8 84 85 86 87 88 89 9 9 9 9 94 95 96 97 98 99 4 5 6 7 8 9 4 5 6 7 8 9 Temperature Rise (ºC) No. 5 No. 6 5 5 5 5 5 5 5 5 5 5 5 5 6 6 6 6 6 6 6 6 6 69 7 7 69 76 7 78 74 8 79 No. 7 5 5 5 5 5 5 6 6 6 6 68 69 7 7 74 76 79 8 87 9 94 97 99 No. 8 5 6 6 6 6 6 68 69 7 7 7 75 8 86 89 9 9 94 97 6 8 4 4 7 No. 9 6 6 6 6 6 6 68 69 69 7 7 7 7 7 76 79 85 94 99 5 4 6 6 6 6 5 85 No. 5 5 5 5 5 5 5 5 5 5 6 6 6 6 6 6 6 68 69 69 7 7 7 74 75 76 See figure 5 for thermocouple layout. Customer: BTC 6F: Page 4 of 7
Additional Unexposed Face Temperature Data (continued) (mins) 4 5 6 7 8 9 4 5 6 7 8 9 4 5 6 7 8 9 4 5 6 7 8 9 No. 4 6 8 5 8 4 6 9 5 7 8 9 4 4 4 4 4 Temperature Rise (ºC) No. 5 7 9 4 6 9 5 8 5 6 8 9 4 5 5 5 No. 4 6 8 5 7 4 7 9 4 6 7 8 9 4 4 4 4 Customer: BTC 6F: Page 5 of 7
(mins) 4 4 4 5 5 5 5 6 6 6 6 68 69 7 7 7 7 74 75 76 77 78 79 8 8 No. 5 5 5 5 Temperature Rise (ºC) No. 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 No. 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 Customer: BTC 6F: Page 6 of 7
(mins) 8 8 84 85 86 87 88 89 9 9 9 9 94 95 96 97 98 99 4 5 6 7 8 9 4 5 6 7 8 9 No. 6 6 6 6 6 6 6 6 68 7 7 74 76 78 8 8 87 9 94 99 4 7 7 4 6 77 9 4 5 5 6 Temperature Rise (ºC) No. 68 7 7 7 75 77 79 8 8 8 8 84 85 87 88 9 9 96 6 7 7 95 9 4 6 84 5 6 89 No. 6 6 6 6 6 6 6 6 6 68 69 7 7 75 76 78 79 8 8 8 8 8 85 86 88 89 9 9 95 97 See figure 5 for thermocouple layout. Customer: BTC 6F: Page 7 of 7
Additional Internal Temperature Data Actual Temperature (ºC) At 75mm height Left Stud. Cold Flange. No. 6 8 9 75 79 8 86 88 89 9 98 4 6 4 5 6 68 7 78 84 At 5mm height (mins) 4 5 6 7 8 9 4 5 6 7 8 9 4 5 6 7 8 9 Right Stud. Cold Flange. No. 9 9 9 6 6 6 7 84 9 9 99 6 4 9 8 74 84 7 7 8 9 5 Left Stud. Cold Flange No 8 8 74 8 9 94 99 7 4 8 8 5 6 68 7 78 8 87 9 97 9 Right Stud. Cold Flange No. 9 9 4 5 6 77 87 9 8 7 6 7 4 75 8 86 9 9 96 5 6 9 7 Customer: BTC 6F: Page 8 of 7
Actual Temperature (ºC) At 75mm height Left Stud. Cold Flange. No. 6 9 99 7 5 4 4 7 78 84 9 97 4 8 4 8 5 6 69 76 8 9 99 45 8 At 5mm height (mins) 4 5 6 7 8 9 4 4 4 5 5 5 5 6 6 6 6 Right Stud. Cold Flange. No. 9 75 8 9 8 6 4 4 6 7 75 8 86 9 95 4 4 7 8 4 6 6 8 Left Stud. Cold Flange No 8 8 9 5 6 7 8 9 9 8 5 7 4 6 7 79 85 9 98 4 45 9 6 7 4 Right Stud. Cold Flange No. 75 86 97 5 9 6 4 5 7 76 8 88 94 4 4 8 4 8 5 9 7 5 5 5 Customer: BTC 6F: Page 9 of 7
Actual Temperature (ºC) At 75mm height Left Stud. Cold Flange. No. 6 4 9 6 7 4 5 5 5 5 5 9 5 8 4 6 6 6 69 6 68 6 6 6 7 At 5mm height (mins) 68 69 7 7 7 7 74 75 76 77 78 79 8 8 8 8 84 85 86 87 88 89 9 9 9 9 94 95 96 97 98 99 Right Stud. Cold Flange. No. 9 5 5 5 5 4 8 7 6 5 9 69 6 68 6 6 6 6 6 9 Left Stud. Cold Flange No 7 5 5 5 5 6 9 5 7 9 6 68 6 6 6 8 9 686 75 7 Right Stud. Cold Flange No. 5 5 5 5 9 5 6 6 7 6 68 69 6 6 6 7 685 69 7 78 7 897 Customer: BTC 6F: Page of 7
Actual Temperature (ºC) At 75mm height Left Stud. Cold Flange. No. 6 79 8 At 5mm height (mins) 4 5 6 7 8 9 4 5 6 7 8 9 Right Stud. Cold Flange. No. 9 Left Stud. Cold Flange No 789 789 Right Stud. Cold Flange No. See figure 5 for the location of the thermocouples. No. 6 did not work after 5 minutes. No. 9 did not work after minutes. No. did not work after 5 minutes. No. did not work after minutes. Customer: BTC 6F: Page of 7
Specimen Lateral Deflection Deflection (mm) (mins) Centrally On free end 4 5 6 7 8 9 4 5 6 7 8 9 4 5 6 7 8 9 4 5 6 7 8 9 4.4 5.7.7.9 7. 78. 84. 88. 9.8 9.9 95. 96.6 97.8 99..6.9. 4.5 5.9 7.8.9 4. 6.6 9.8.8 6.4..9 7.8.. 5..5. 6.5 69.4 7.5 75.. 5.7 4.5.4 5.9 6.5. 7.5 77.5 8. 8. 8.9 8. 8. 8.8 8.4 8. 8.4 8.6 8 8.6 84.4 85. 87 89 9.9 95. 98.7.5 6.7. 5.7 9.7.7 7..6. 5.5 7. 9 4.5 Customer: BTC 6F: Page of 7
Deflection (mm) (mins) Centrally On free end 4 4 5 5 5 5 6 6 6 6 68 69 7 7 7 7 74 75 76 77 78 79 8 8 8 8 77.7 8. 8 85.4 87.8 9 9. 94. 96.4 98.4.6.6 4.5 6. 8 9.6. 4.8 6.6 8. 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.6 8.6 8.6 8.6 8.6 8.6 4.8 4 4.9.7..8..5.7.9...5.7.8..4.6.9...4.6.9 5 5. 5. 5.4 5.5 5.6 5.8 5.9 5 5 5. 5. 5. 5. 5. 5. 5. 5. 5. Customer: BTC 6F: Page of 7
Deflection (mm) (mins) Centrally On free end 84 85 86 87 88 89 9 9 9 9 94 95 96 97 98 99 4 5 6 7 8 9 4 5 6 7 8 9 8.6 8.6 8.6 8.7 8.7 8.7 8.7 8.7 8.7 8.8 8.7 8.5 5. 5. 5. 5. 5. 5. 5. 5. 5. 5. 5. 5. The deflection was recorded at the approximate centre of the specimen and at midheight on the free edge. Positive readings indicate deflection into the furnace. Deflection transducers removed at 95 minutes. Customer: BTC 6F: Page 4 of 7
PHOTOGRAPHS Photo. Exposed face prior to test. Customer: BTC 6F: Page 5 of 7
Photo. Unexposed face prior to test. Customer: BTC 6F: Page 6 of 7
Photo. View of unexposed face at Test Termination. Customer: BTC 6F: Page 7 of 7