P.O. Box ZN Bleiswijk Brandpuntlaan Zuid NZ Bleiswijk The Netherlands
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1 P.O. Box ZN Bleiswijk Brandpuntlaan Zuid NZ Bleiswijk The Netherlands Determination according to EN :2013 of the contribution to the fire resistance of structural steel members by a three or four sided single layer boxed protection from PROMATECT -H boards Assessment report - numerical regression method Report no. Sponsor Bormstraat 24 B-2830 Tisselt Belgium Author(s) P.W.M. Kortekaas L.M. Noordijk, MSc. Project number Date of issue Number of pages 26 This report consists of twenty-six pages and may only be used in its entirety. Page 1 / 26
2 CONTENTS 1. SUBJECT 3 2. INVESTIGATION 3 3. SPONSOR AND MANUFACTURER sponsor manufacturer 3 4. LOCATION AND DATE OF THE INVESTIGATION 3 5. TEST SPECIMENS test specimens dimensions of the test specimens corrected times to reach certain design temperatures 5 6. ASSESSMENT OF THE RESULTS correction of the times to reach certain steel temperatures of the columns (mechanical behaviour) determination of the effective heat conductivity coefficient (thermal behaviour) graphs 7 7. CONCLUSION 7 8. CONDITIONS AND FIELD OF APPLICATION 8 9. MEASURED CORRECTED TIMES VS CALCULATED TIMES DESIGN GRAPHS DESIGN TABLES 22 This report consists of twenty-six pages and may only be used in its entirety. Page 2 / 26
3 1. SUBJECT PROMATECT -H, a fire resistant calcium silicate board material 2. INVESTIGATION Contribution, according to EN :2013, to the fire resistance of structural steel members by a single layer three or four sided boxed protection from PROMATECT -H fire resistant calcium silicate boards. The method for processing the results is the numerical regression assessment method. 3. SPONSOR AND MANUFACTURER 3.1 SPONSOR Promat Research and Technology Centre N.V. Bormstraat 24 B-2830 Tisselt België 3.2 MANUFACTURER Promat Research and Technology Centre N.V. Bormstraat 24 B-2830 Tisselt België 4. LOCATION AND DATE OF THE INVESTIGATION 8 unloaded short columns - Laboratory: Efectis Nederland BV, Rijswijk, The Netherlands; - Test dates: 14, 17 and 28 February and 29 May 2012; - Efectis Report: 2012-Efectis-R unloaded short columns - Laboratory: Efectis Nederland BV, Rijswijk, The Netherlands; - Test dates: 30 October 2008 and 15 December 2010; - Efectis Report: 2011-Efectis-R unloaded short column - Laboratory: Warrington Fire Gent, Gent, Belgium; - Test dates: 9 September 2008; - Report: test report 13470A. Two beam pairs - Laboratory: Efectis Nederland B.V., Rijswijk, The Netherlands; - Test dates: 13 June 2013 (12 mm) and 2 July 2013 (25 mm); - Report: test reports 2013-Efectis-R0250 and 2013-Efectis-R0251. This report consists of twenty-six pages and may only be used in its entirety. Page 3 / 26
4 5. TEST SPECIMENS For a description of the test specimens and the method of application of the boards we refer to the test reports mentioned in the table below. A summary of the test specimens used for the assessment according to EN :2013 (numerical regression method) is given in the table below. 5.1 TEST SPECIMENS Test specimen Type Thickness of the boards mm Nominal section factor m-1 Test date Report Loaded beam IPE Efectis-R0250 Reference beam IPE Efectis-R0250 Loaded beam IPE Efectis-R0251 Reference beam IPE Efectis-R0251 Unloaded short column HEM Efectis-R0224 Unloaded short column HEM Efectis-R0224 Unloaded short column HEM Efectis-R0224 Unloaded short column HEA Efectis-R0224 Unloaded short column HEA Efectis-R0694 Unloaded short column HEA A Unloaded short column IPE Efectis-R0694 Unloaded short column IPE Efectis-R0224 Unloaded short column IPE Efectis-R0224 Unloaded short column IPE Efectis-R0694 Unloaded short column IPE Efectis-R0224 Unloaded short column IPE Efectis-R0224 Unloaded short column IPE Efectis-R DIMENSIONS OF THE TEST SPECIMENS Type Protection thickness Height Width Thickness flange Thickness web Area Perimeter Actual section factor mm mm mm mm mm m2 m m-1 HEM HEM HEM HEA HEA HEA IPE IPE IPE IPE IPE IPE IPE This report consists of twenty-six pages and may only be used in its entirety. Page 4 / 26
5 5.3 CORRECTED TIMES TO REACH CERTAIN DESIGN TEMPERATURES Profile Section factor [m-1] Thickness [mm] Critical steel temperature [ C] HEM HEM HEM HEA HEA HEA IPE IPE IPE IPE IPE IPE IPE time [min.] time [min.] time [min.] time [min.] time [min.] time [min.] time [min.] time [min.] time [min.] time [min.] time [min.] time [min.] time [min.] ASSESSMENT OF THE RESULTS 6.1 CORRECTION OF THE TIMES TO REACH CERTAIN STEEL TEMPERATURES OF THE COLUMNS (MECHANICAL BEHAVIOUR) From the measured steel temperatures of the loaded beams en the unloaded reference beams characteristic temperatures were determined according to par in EN :2013.With the times to reach certain characteristic temperatures correction factors were determined. In agreement with Annex D of EN :2013, the correction temperatures above the characteristic temperature at which failure of the loaded section occurred, the minimum observed correction factor just before failure is used. The temperature correction factors for single layer PROMATECT -H fire resistant calcium silicate boards are given in figure 6.1. This report consists of twenty-six pages and may only be used in its entirety. Page 5 / 26
6 K-factor Efectis Nederland Report Stickability correction factor mm 25 mm Critical steel temperature C Figure 6.1 temperature correction factors for both beam tests. These correction factors were, according to EN :2013, applied to the times to reach certain average temperatures in the columns. 6.2 DETERMINATION OF THE EFFECTIVE HEAT CONDUCTIVITY COEFFICIENT (THERMAL BEHAVIOUR) According to EN :2013 the effective heat conductivity coefficient was determined with the following formula. d p a a t a0 a1d p a2 a3 a a4d p a a5d p a6 a A / V A / V A / V m m m 7 A 1 / m V Wherein: t is the corrected time to reach design temperature θ a in minutes d p is the board thickness in mm A m /V is de measured section factor in m -1 a 0 t/m a 7 are constants θ a is the critical steel temperature in C This report consists of twenty-six pages and may only be used in its entirety. Page 6 / 26
7 The constants a 0 t/m a 7 are determined using linear regression techniques following the criteria of EN :2013 : a) For each short section the predicted time to reach the design temperature shall not exceed the corrected time by more than 15% b) The mean value of all percentage differences as calculated in a) shall be less than zero c) A maximum of 30% of all individual values of all percentage differences as calculated in a) shall be more than zero The results of the calculation are: t d d p d p ( ) a d p a A / V a a ( ) A / V A / V A / V m p m m m 6.3 GRAPHS Based on the effective heat conductivity coefficient two sets of data were calculated: Graphs in Figure 10.1 to 10.9 in which for a specific design steel temperature (350 to 750 C in steps of 50 C) the relation between the fire resistance and the section factor is given for a certain protected structural steel member. Tables in Chapter 11 which give the required thickness for a certain fire resistance (in minutes) for a given critical steel temperature and section factor. 7. CONCLUSION The fire resistance of structural steel members protected with a single layer three or four-sided boxed protection from PROMATECT -H fire resistant calcium silicate boards may according to EN :2013 be determined using figures 10.1 t/m 10.9 and the tables in chapter 11 under the conditions given in chapter 8 of this report. This report consists of twenty-six pages and may only be used in its entirety. Page 7 / 26
8 8. CONDITIONS AND FIELD OF APPLICATION The section factor has to be determined according to figure 1 of EN :2013. The figures 10.1 to 10.8 and the tables in chapter 11 are only valid under the conditions mentioned below: 46 m-1 Am/V 362 m-1 (section factor) 11.4 dp mm (thickness) 350 C θa 750 C If the figures in chapter 10 or the tables in chapter 11 are used, intermediate values for the critical steel temperature may be interpolated using linear interpolation. The results in chapter 10 and 11 are valid for three and four sided boxed protection. P.W.M. Kortekaas Pojectleader Resistance to Fire L.M. Noordijk, M.Sc. Project leader Resistance to Fire This report consists of twenty-six pages and may only be used in its entirety. Page 8 / 26
9 9. MEASURED CORRECTED TIMES VS CALCULATED TIMES Critical steel temperature C Thickness mm Section factor m-1 Tmeas Min. Tcalc Min. Tcalc/Tmeas This report consists of twenty-six pages and may only be used in its entirety. Page 9 / 26
10 This report consists of twenty-six pages and may only be used in its entirety. Page 10 / 26
11 Criterion value Max. unsafe Cumulative deviation Percentage safe side 70.10% This report consists of twenty-six pages and may only be used in its entirety. Page 11 / 26
12 10. DESIGN GRAPHS Figure 10.1 : Fire resistance as function of the section factor and the board thickness for a critical steel temperature of 350 C. Figure 10.2 : Fire resistance as function of the section factor and the board thickness for a critical steel temperature of 400 C. Figure 10.3 : Fire resistance as function of the section factor and the board thickness for a critical steel temperature of 450 C. Figure 10.4 : Fire resistance as function of the section factor and the board thickness for a critical steel temperature of 500 C. Figure 10.5 : Fire resistance as function of the section factor and the board thickness for a critical steel temperature of 550 C. Figure 10.6 : Fire resistance as function of the section factor and the board thickness for a critical steel temperature of 600 C. Figure 10.7 : Fire resistance as function of the section factor and the board thickness for a critical steel temperature of 650 C. Figure 10.8 : Fire resistance as function of the section factor and the board thickness for a critical steel temperature of 700 C. Figure 10.9 : Fire resistance as function of the section factor and the board thickness for a critical steel temperature of 750 C. This report consists of twenty-six pages and may only be used in its entirety. Page 12 / 26
13 P.O. Box ZN Bleiswijk Brandpuntlaan Zuid NZ Bleiswijk The Netherlands Figure 10.1 : Critical steel temperature 350 C This report consists of twenty-six pages and may only be used in its entirety. Page 13 / 26
14 Figure 10.2 : critical steel temperature 400 C This report consists of twenty-six pages and may only be used in its entirety. Page 14 / 26
15 Figure 10.3 : critical steel temperature 450 C This report consists of twenty-six pages and may only be used in its entirety. Page 15 / 26
16 Figure 10.4 : critical steel temperature 500 C This report consists of twenty-six pages and may only be used in its entirety. Page 16 / 26
17 Figure 10.5: critical steel temperature 550 C This report consists of twenty-six pages and may only be used in its entirety. Page 17 / 26
18 Figure 10.6 : critical steel temperature 600 C This report consists of twenty-six pages and may only be used in its entirety. Page 18 / 26
19 Figure 10.7: critical steel temperature 650 C This report consists of twenty-six pages and may only be used in its entirety. Page 19 / 26
20 Figure 10.8 : critical steel temperature 700 C This report consists of twenty-six pages and may only be used in its entirety. Page 20 / 26
21 Figure 10.9 : critical steel temperature 750 C This report consists of twenty-six pages and may only be used in its entirety. Page 21 / 26
22 P.O. Box ZN Bleiswijk Brandpuntlaan Zuid NZ Bleiswijk The Netherlands DESIGN TABLES Design table 1 : fire resistance 30 minutes required protection thickness in mm Critical steel temperature C Section factor m This report consists of twenty-six pages and may only be used in its entirety. Page 22 / 26
23 Design table 2 : fire resistance 60 minutes required protection thickness in mm Critical steel temperature C Section factor m This report consists of twenty-six pages and may only be used in its entirety. Page 23 / 26
24 Design table 3 : fire resistance 90 minutes required protection thickness in mm Critical steel temperature C Section factor m This report consists of twenty-six pages and may only be used in its entirety. Page 24 / 26
25 Design table 4 : fire resistance 120 minutes required protection thickness in mm Critical steel temperature C Section factor m Design table 5 : fire resistance 150 minutes required protection thickness in mm Critical steel temperature C Section factor m This report consists of twenty-six pages and may only be used in its entirety. Page 25 / 26
26 Design table 6 : fire resistance 180 minutes required protection thickness in mm Critical steel temperature C Section factor m Design table 7 : fire resistance 210 minutes required protection thickness in mm Critical steel temperature C Section factor m Design table 8 : fire resistance 240 minutes required protection thickness in mm Critical steel temperature C Section factor m Design table 9 : fire resistance 270 minutes required protection thickness in mm Critical steel temperature C Section factor m This report consists of twenty-six pages and may only be used in its entirety. Page 26 / 26
P.O. Box 554-2665 ZN Bleiswijk Brandpuntlaan Zuid 16-2665 NZ Bleiswijk The Netherlands +31 88 3473 723 nederland@efectis.com
P.O. Box 554-2665 ZN Bleiswijk Brandpuntlaan Zuid 16-2665 NZ Bleiswijk The Netherlands +31 88 3473 723 nederland@efectis.com Determination according to EN 13381-4:2013 of the contribution to the fire resistance
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