Fire Performance of CLT Members: A Detailed Review of Experimental Studies Across Multiple Scales

  • Christos Kontis
  • Christoforos Tsichlas
  • Dionysios I. KolaitisEmail author
  • Maria A. Founti
Conference paper


Cross-laminated timber (CLT) is an innovative wood product that is increasingly used in both residential and non-residential construction projects, since it offers a range of advantages, such as light carbon footprint, quick erection time, good thermal and sound insulation characteristics. CLT members have the potential to provide excellent fire resistance characteristics, often comparable to typical massive, non-combustible construction assemblies. However, the fire performance of CLT can be affected by a large variety of material and design parameters, such as physical properties (e.g. density, grain orientation), member thickness, number of plies, adhesive type, connector type, protection panels. In this context, this work presents a thorough review of recent experimental studies, aimed at determining the fire behaviour of CLT members. A large number of test results obtained in a broad range of setups, spanning multiple scales, such as cone calorimeter (50 tests), standard fire resistance furnace (90 tests) and fire compartment (20 tests), are comparatively assessed. The impact of the main material and design parameters on several important fire performance factors is investigated. Analysis of the reported experimental results allows the determination of certain global trends that are observed in the majority of cases.


CLT Fire performance Experimental Fire tests Large scale 



This work has been financially supported by the Horizon 2020 project “Build-In-Wood: Sustainable Wood Value Chains for Construction of Low-Carbon Multi-Storey Buildings from Renewable Resources” (Grant No. 862820).


  1. 1.
    Emberley R, Putynska CG, Bolanos A, Lucherini A, Solarte A, Soriguer D, Gonzalez MG, Humphreys K, Hidalgo JP, Maluk C, Law A, Torero JL (2017) Description of small and large-scale cross laminated timber fire tests. Fire Saf J 91:327–335CrossRefGoogle Scholar
  2. 2.
    Crielaard R, van de Kuilen JW, Terwel K, Ravenshorst G, Steenbakkers P (2019) Self-extinguishment of cross-laminated timber. Fire Saf J 105:244–260CrossRefGoogle Scholar
  3. 3.
    Emberley R, Do T, Yim J, Torero JL (2017) Critical heat flux and mass loss rate for extinction of flaming combustion of timber. Fire Saf J 91:252–258CrossRefGoogle Scholar
  4. 4.
    Frangi A, Fontana M, Knobloch M, Bochicchio G (2008) Fire behaviour of cross-laminated solid timber panels. Fire Saf Sci 9:1279–1290CrossRefGoogle Scholar
  5. 5.
    Craft S, Desjardins R, Mehaffey JR (2011) Investigation of the behaviour of CLT panels exposed to fire, FP Innovations Report, CanadaGoogle Scholar
  6. 6.
    Osborne L, Dagenais C, Benichou N (2012) Preliminary CLT fire resistance testing report, NRC-CNRC ReportGoogle Scholar
  7. 7.
    Klippel M, Leyder C, Frangi A, Fontana M, Lam F, Ceccoti A (2014) Fire tests on loaded CLT wall and floor elements. Fire Saf Sci 11:626–639CrossRefGoogle Scholar
  8. 8.
    Schmid J, Menis A, Fragiacomo M, Clemente I, Bochicchio G (2015) Behaviour of loaded CLT wall elements in fire conditions. Fire Technol 51:1341–1370CrossRefGoogle Scholar
  9. 9.
    Suzuki J, Mizukami T, Naruse T, Araki Y (2016) Fire resistance of timber panel structures under standard fire exposure. Fire Technol 52:1015–1034CrossRefGoogle Scholar
  10. 10.
    Wiesner F, Randmael F, Wan W, Bisby L, Hadden RM (2017) Structural response of CLT compression elements exposed to fire. Fire Saf J 85:56–67CrossRefGoogle Scholar
  11. 11.
    Frangi A, Fontana M, Hugi E, Jobstl R (2009) Experimental analysis of cross-laminated timber panels in fire. Fire Saf J 44(8):1078–1087CrossRefGoogle Scholar
  12. 12.
    Leikanger Friquin K (2011) Material properties and external factors influencing the charring rate of solid wood and glue-laminated timber. Fire Mater 35:303–327CrossRefGoogle Scholar
  13. 13.
    Menis A (2012) Fire resistance of laminated veneer lumber (LVL) and cross-laminated timber (XLAM) elements. PhD thesis, Universita degli Studi di CagliariGoogle Scholar
  14. 14.
    Hasburgh L, Bourne K, Dagenais C, Ranger L, Roy-Poirier A (2016) Fire performance of mass-timber encapsulation methods and the effect of encapsulation on char rate of cross-laminated timber. In: World conference on timber engineering, AustriaGoogle Scholar
  15. 15.
    Hasburgh L, Bourne K, Peralta P, Mitchell P, Schiff S, Pang W (2016) Effect of adhesives and ply configuration on the fire performance of southern pine cross-laminated timber. In: World conference on timber engineering, AustriaGoogle Scholar
  16. 16.
    Johansson E, Svenningsson A (2018) Delamination of cross-laminated timber and its impact on fire development, focusing on different types of adhesives. Lund University Report 5562Google Scholar
  17. 17.
    Muszyński L, Gupta R, Hong SH, Osborn N, Pickett B (2019) Fire resistance of unprotected CLT floor assemblies produced in the USA. Fire Saf J 107:126–136CrossRefGoogle Scholar
  18. 18.
    Wilinder P (2009) Fire resistance in cross-laminated timber, thesis (2009)Google Scholar
  19. 19.
    Lineham SA, Thomson D, Bartlett AI, Bisby LA, Hadden RM (2016) Structural response of fire-exposed CLT beams under sustained loads. Fire Saf J 85:23–34CrossRefGoogle Scholar
  20. 20.
    Wiesner F, Bisby LA, Bartlett AI, Hidalgo JP, Santamaria S, Deeny S, Hadden RM (2019) Structural capacity in fire of laminated timber elements in compartments with exposed timber surfaces. Eng Struct 175:284–295CrossRefGoogle Scholar
  21. 21.
    Kolaitis DI, Asimakopoulou EK, Founti MA (2014) Fire protection of light and massive timber elements using gypsum plasterboards and wood based panels: a large-scale compartment fire test. Constr Build Mater 73:163–170CrossRefGoogle Scholar
  22. 22.
    Hadden RM, Bartlett AI, Hidalgo JP, Santamaria S, Wiesner F, Bisby LA, Deeny S, Lane B (2017) Effects of exposed CLT on compartment fire dynamics. Fire Saf J 91:480–489CrossRefGoogle Scholar
  23. 23.
    Li X, Zhang X, Hadjisophocleous G (2015) Experimental study of combustible and non-combustible construction in a natural fire. Fire Technol 51:1447–1474CrossRefGoogle Scholar
  24. 24.
    Frangi A, Bochicchio G, Ceccotti A, Lauriola MP (2006) Natural full-scale fire test on a 3 storey XLam timber building. In: World conference on timber engineering, JapanGoogle Scholar
  25. 25.
    Hakkarainen T (2002) Post-flashover fires in light and heavy timber construction compartments. J Fire Sci 20(2):133–175CrossRefGoogle Scholar
  26. 26.
    Bartlett AI (2018) Auto-extinction of engineered timber. PhD thesis, University of EdinburghGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  • Christos Kontis
    • 1
  • Christoforos Tsichlas
    • 1
  • Dionysios I. Kolaitis
    • 1
    Email author
  • Maria A. Founti
    • 1
  1. 1.Fire Engineering Unit, School of Mechanical EngineeringNational Technical University of AthensAthensGreece

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