Rockwool / Rockfon BV Industrieweg JG ROERMOND Postbus KD ROERMOND The Netherlands

Transcription

1 Efectis Nederland BV Efectis Nederland report 2009-Efectis-R0539[Rev.1] Determination of the fire resistance according to EN : 1999 of a suspended ceiling system of CMC with Rockfon Sonar db44 Dznl/A 1800 x 600 x 50 semi concealed ceiling tiles, suspended under an aerated concrete floor Efectis Nederland BV Centre for Fire Safety Lange Kleiweg 5 P.O. Box CB Rijswijk T F E nederland@efectis.com Date November 2009 Author(s) P.G.R. Scholten, B.Sc. P.W.M. Kortekaas Number of pages 12 (excluding appendices) Number of appendices 3 Sponsor Industrieweg JG ROERMOND Postbus KD ROERMOND The Netherlands Project name Fire resistance floor ceiling construction Project number All rights reserved. No part of this publications may be reproduced and/or published by print, photoprint, microfilm or any others means without the previous written consent of Efectis. In case this report was drafted on instructions, the rights and obligations of contracting parties are subject to either the Standard Conditions for Research Instructions given to TNO, or the relevant agreement concluded between the contracting parties. Submitting the report for inspection to parties who have a direct interest is permitted Efectis Nederland BV: a TNO company This report is issued by Efectis Nederland BV (previously TNO Centre for Fire Research). Efectis Nederland BV and her sister company Efectis France are full subsidiaries of Efectis Holding SAS since 1 st January 2008, in which the Dutch TNO and the French CTICM participate. The activities of the TNO Centre for Fire Research were privatised in Efectis Nederland BV since 1 st July This is in response to international developments and requests by customers. In order to be able to give a better answer to the customer s request and offer a more comprehensive service of high quality and a wider range of facilities, the international collaboration has been further expanded. This is done with highly experienced partners in fire safety in Norway (Sinter-NBL), Spain (Afiti-Licof), Germany (IFT), USA (South West Research Institute) and China (TFRI). Further information can be found at our website.

2 2 / 12 Contents 1 Subject Investigation Sponsor Place and data regarding the investigation Investigated construction General Materials Suspended ceiling system Ceiling tiles Floor and supporting construction Fixing materials Sealing materials Method of assembly and mounting Floor Ceiling Production of the construction Course of investigation Verification of the specimen Conditioning Density and humidity measurements Fire test Test conditions Load Measurements Test results Uncertainty of measurement Observations Summary Classification Field of application Figures and pictures...10 Appendices A Furnace and laboratory conditions B Test results C Photographs

3 3 / 12 1 Subject A floor / ceiling construction build up of reinforced aerated concrete floor members supported by steel sections IPE 140 with a suspended ceiling system of CMC Bandraster profiles with Rockfon Sonar db44 Dznl / A semi concealed ceiling tiles with the module size 1800 x 600 x 50 mm. 2 Investigation Determination of the fire resistance according to EN Sponsor Industrieweg JG Roermond Postbus KD Roermond The Netherlands 4 Place and data regarding the investigation The investigation took place at the laboratory of Efectis Nederland BV in Rijswijk, The Netherlands. Building the walls and floor construction: 19 th of January 2009 Installing the suspended ceiling: 4 th of March 2009 Fire test: 5 th of February Investigated construction 5.1 General A floor ceiling construction was the subject of the investigation. The build up was of reinforced aerated concrete floor members supported by steel sections IPE 140 with a suspended ceiling system of CMC Bandraster profiles, measurements 3.2 x 4.0 m, see Figure The semi concealed ceiling tiles are produced by Rockfon and of the type Rockfon Sonar db44 Dznl / A with the module size 1800 x 600 x 50 mm.

4 4 / Materials Suspended ceiling system The profiles were made of cold rolled thermally zinc coated steel. On the visible side the bandraster profile was coated with a polyester paint with a thickness of 25µm. The system was build up from the following profiles: (1) 1 : Main profile of the type CMC main measurements 100 x 35.4mm with a material thickness of 0.6mm. (2): Intermediate Z profile of the type CMC Z70 main measurements 70 x 19mm, material thickness of 0.6mm. (3): Intermediate Z profile with hook of the type CMC Z70H main measurements 70 x 19mm, material thickness of 0.6mm. (4): Caddy clip 4-H-24. (5): Suspender of the nonius type held together by two R clips. (6): Wall profiles of the type , main measurements 24 x 24 x 0.5mm. The items 2 and 3 were used alternating. The main profiles were connected to the nonius suspender (5), the positions are given in Figure Ceiling tiles Rockfon, type Sonar db 44 Dznl / A semi concealed ceiling tiles, a self supporting tile made of stone wool finished with paint and a structurized mineral membrane on the visible side with the module size 1800 x 600 x 50 mm Floor and supporting construction The floor construction was made out of: Three steel sections IPE 140, length 4600 mm, span Lt = 4150 mm. Six reinforced aerated concrete floor slabs: 150 x 750 mm, length 3050 mm (4 pieces). 150 x 400 mm, length 3050 mm (2 pieces). The floor was build in the steel test frame in which a aerated concrete supporting construction was made with a thickness of 150 mm and inner dimensions of 4000 x 3200 mm Fixing materials Steel nails galvanically zinced, measurements Ø 3.5 x 60 mm, c.t.c. approximately 300 mm, for fixing the wall profiles (6) to the aerated concrete frame. Caddy clip (4) of the type 4-H-24, for fixing the nonius suspenders (5) to the sections IPE 140, for the positions see Figure Sealing materials Strips of stone wool, type Rockwool 750, density 115 kg/m³: Used for closing the joints between the floor slabs. 1 The numbers in between the brackets refer to the numbers in figure 12.1

5 5 / Method of assembly and mounting Floor Ceiling The build up of the construction is given in Figure The assembly and mounting of the floor / ceiling construction is given hereunder. Placing three steel sections IPE 140, c.t.c. approximately 1200 mm, in the longitudinally direction of the aerated concrete frame. Placing the aerated concrete floor slabs in the steel test frame. Closing the joints between the floor slabs, between the floor slabs and the aerated concrete frame and the openings at the locations of the steel sections. Placing the wall profiles (6) on the inside of the aerated concrete frame at a distance of approximately 400 mm from the bottom of the floor slabs fixed with steel nails with a c.t.c. distance of approximately 300 mm. Placing the Caddy clip (4) and nonius suspenders (5) to the IPE 140 sections, c.t.c mm crosswise to the span of the steel sections, see Figure Shortening the main profiles (1) to lengths of approximately 2645 and 555 mm. Placing the bandraster wall connector into the bandraster. Connecting the main profiles and placing them to the nonius suspenders. For the positions of the couplings see Figure Adjusting the nonius suspenders to correct length and locking them with two R-clips. Placing the intermediate profiles on the ceiling tiles, starting with item 2 at c.t.c. distances of 300 mm. The items 2 and 3 were used alternating. Placing of the ceiling tile in the grid. 6 Production of the construction : Production of the ceiling tiles, placing the suspended ceiling system and tiles. CMC: Production of the profiles of the ceiling system Efectis Nederland BV Rijswijk, The Netherlands: Supporting construction 7 Course of investigation 7.1 Verification of the specimen Efectis Nederland BV was not involved in the selection procedure of the specimen. During mounting the used materials and parts were verified against the supplied data.

6 6 / Conditioning From the moment of installation until the fire test the construction was stored in the laboratory of Efectis Nederland BV with the following conditions: Ambient temperature: 20 ± 5 C. Relative humidity: 50 ± 10 %. 7.3 Density and humidity measurements 7.4 Fire test The density and the moisture equilibrium of the stone wool ceiling tiles were determined. Density kg/m 3. Moisture equilibrium 3 of 0.9 % Test conditions Load The test was performed under the conditions as specified in EN , using the standard fire curve. The specimen was heated from the underside only. The aim for the furnace pressure, as measured 100 mm below the ceiling, was 20 Pa. Dead weight was distributed on the aerated concrete floor slabs, resulting in 1.32 kn/m on each of the IPE 140 sections. The load induced by the weight of the construction itself was 1.68 kn/m on each of the IPE 140 sections. The total load on each of the IPE 140 sections during heating was 3 kn/m Measurements During the heating the following data were measured and registered: gas temperatures inside the furnace with ten plate thermometers (TPL 1 to TPL 12), regularly spread over the directly heated surface. The temperatures of steel sections with six thermocouples (TK 1 up to 12). The air temperatures in the cavity with five thermocouples (TK 13 up to TK 17). The surface temperatures with five thermocouples (TK 18 up to TK 22) The pressure inside the furnace at 100 mm below the ceiling. The defection at the centre and left and right free edge of the test specimen. Temperature in the laboratory. The positions of the thermocouples and deflection measurement are given in figure B1. 2 Determined before drying 3 Determined after drying for at least 24 hrs at 105 C

7 7 / 12 8 Test results Test results are given in graphs in appendix B. During the heating the temperature in the laboratory fulfilled the requirements of EN : Uncertainty of measurement 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. 8.2 Observations Table 8.1 Time [min] Observation Initial displacement is 3 mm 0 Start of heating. 5 The membrane of some of the tiles fall 27 At the location A, a crack is appearing because a ceiling tile is sagging 29 At the location A one ceiling tile has fallen out of the grid 32 The end of the heating after consulting the sponsor. All criteria are fulfilled. 9 Summary According to the EN , a floor / ceiling construction was investigated which was built up of reinforced aerated concrete floor members supported by steel sections IPE 140. The most important results of the investigation are given in Table 9.1.

8 8 / 12 Table 9.1 Summery of test results - Load bearing capacity R - Integrity E sustained flaming gap gauge cotton pad - Insulation I 32 minutes no failure, test having been discontinued at the request of the sponsor 32 minutes no failure, test having been discontinued at the request of the sponsor 32 minutes no failure, test having been discontinued at the request of the sponsor 32 minutes no failure, test having been discontinued at the request of the sponsor 32 minutes no failure, test having been discontinued at the request of the sponsor 9.1 Classification The classification according EN :2007 is: REI 30. The details of classification are given in the report 2009-Efectis-R Field of application 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 procedure outlined in EN , and where appropriate EN 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 the relevant test method is not covered by this report. The test results are directly applicable to a similar floor / ceiling construction provided the following is true: 1. With respect to the structural building member: Aerated concrete floor, minimum thickness 150 mm, with IPE 140 steel members The maximum moments and shear forces, which when calculated on the same basis as the test load shall not be greater than those tested. The load on the steel members was 3 kn/m. 2. With respect to the ceiling system: The size of panels of the ceiling lining and suspension system shall not be changed. No openings in the lining are allowed. 3. With respect to the cavity: The height of the cavity, 400 mm, is equal to or greater than the height tested. No combustible or insulating material is added to the cavity.

9 9 / 12 Regarding this field of application it is also required that construction elements, which are connected to the tested construction have a fire resistance which is at least equal to that of the floor / ceiling construction. P.G.R. Scholten, B.Sc. P.W.M. Kortekaas This report is issued by Efectis Nederland BV (previously TNO Centre for Fire Research). Efectis Nederland BV and her sister company Efectis France are full subsidiaries of Efectis Holding SAS since 1 st January 2008, in which the Dutch TNO and the French CTICM participate. The activities of the TNO Centre for Fire Research were privatised in Efectis Nederland BV since 1 st July This is in response to international developments and requests by customers. In order to be able to give a better answer to the customer s request and offer a more comprehensive service of high quality and a wider range of facilities, the international collaboration has been further expanded. This is done with highly experienced partners in fire safety in Norway (Sinter-NBL), Spain (Afiti-Licof), Germany (IFT), USA (South West Research Institute) and China (TFRI). Further information can be found at our website.

10 10 / Figures and pictures Figure 11.1 Overview of the components and the test set up

11 11 / 12 Picture 11.2 Connector for the bandraster main profiles Picture 11.3 Bandraster wall connector

12 12 / 12 Picture 11.4 Bandraster profile with wall connector laid onto the wall profile

13 Appendix A.1/4 A Furnace and laboratory conditions Figure A1: Furnace temperature Figure A2: Deviation fire curve according to EN Figure A3: Overpressure in the furnace

14 Appendix A.2/4 Efectis Nederland, Centre for Fire Safety Date: Furnace temperature Project : Rockfon Sonar db 44 Dznl/A Projectnbr : Temperature [ C] ===> stbmax stbmin TOV 1 TOV 2 TOV 3 TOV 4 TOV 5 TOV 6 TOV 7 TOV 8 TOV 9 TOV 10 TOV 11 TOV Time [min] ===> Figure A1

15 Appendix A.3/4 Efectis Nederland, Centre for Fire Safety Date: Deviation fire curve according to EN Project : Rockfon Sonar db 44 Dznl/A Projectnbr : Deviation fire curve [%] ===> EN+ ENdev_ISO Time [min] ===> Figure A2

16 Appendix A.4/4 Efectis Nederland, Centre for Fire Safety Date: Overpressure in the furnace Project : Rockfon Sonar db 44 Dznl/A Projectnbr : Pressure [Pa] ===> Time [min] ===> Figure A3

17 Appendix B.1/7 B Test results Figure B1: Overview of the thermocouples on the floor and in the cavity Figure B2: Surface temperatures Figure B3: Steel temperatures Figure B4: Cavity temperatures Figure B5: Displacements Figure B6: Displacement speed

18 Appendix B.2/7 A A Figure B1: Overview of the thermocouples on the floor and in the cavity

19 Appendix B.3/7 Efectis Nederland, Centre for Fire Safety Date: Surface temperatures Project : Rockfon Sonar db 44 Dznl/A Projectnbr : Temperature [ C] ===> TK 18 TK 19 TK 20 TK 21 TK Time [min] ===> Figure B2

20 Appendix B.4/7 Efectis Nederland, Centre for Fire Safety Date: Steel temperatures Project : Rockfon Sonar db 44 Dznl/A Projectnbr : Temperature [ C] ===> TK 1 TK 2 TK 3 TK 4 TK 5 TK 6 TK 9 TK 10 TK 11 TK Time [min] ===> Figure B3

21 Appendix B.5/7 Efectis Nederland, Centre for Fire Safety Date: Cavity temperatures Project : Rockfon Sonar db 44 Dznl/A Projectnbr : Temperature [ C] ===> TK 13 TK 14 TK 15 TK 16 TK Time [min] ===> Figure B4

22 Appendix B.6/7 Efectis Nederland, Centre for Fire Safety Date: Displacements Project : Rockfon Sonar db 44 Dznl/A Projectnbr : Displacement [mm] ===> Displacement right Displacement centre Displacement left Time [min] ===> Figure B5

23 Appendix B.7/7 Efectis Nederland, Centre for Fire Safety Date: Displacement speed Project : Rockfon Sonar db 44 Dznl/A Projectnbr : Speed [mm/m] ===> Displacement speed right Displacement speed centre Displacement speed left Time [min] ===> Figure B6

24 Appendix C.1/1 C Photographs Figure C1: Specimen before the test seen from the exposed side Figure C2: Specimen before the test seen from the non exposed side