and for verifying the methods for the fire resistance calculation of wood constructions. For additional information related to calculating a fire rating for heavy timber members, please refer to AITC Technical N ote No.7 Calculation of F ire Resistance of Glued Laminated Timbers(www.aitc-glulam.org) and to AF&PA Technical Report 10Calculating the Fire Resistance of Exposed Wood Members (www.awc.org). Fire resistance of timber elements The use of CLT alone or in combination with other mass timber elements, such as glued-laminated timber (GLT), nail-laminated timber (NLT), or structural composite lumber FIRE RESISTANCE OF TIMBER MEMBERS Robert H. White INTRODUCTION The fire resistance ratings of wood members and assem-blies, as of other materials, have traditionally been obtained by testing the assembly in a furnace in accordance with American Society for Testing and Materials (ASTM) Stan-dard E 119.1 These ratings are also published in listings, Abstract Fire hazards are one of the major concerns for wooden constructions. Material behaviour in fire . fire-retardant-treated wood may be used. fire-resistance rating (FRR) when utilizing mass timber materials such as glulam or CLT. Basic strategies . Inventory of Fire Resistance-Tested Mass Timber Assemblies & Penetrations Following is a list of mass timber assemblies and penetration fire stopping systems in mass timber assemblies that have been tested for fire-resistance. Fire Resistance of Unprotected Cross-Laminated Timber Wall Assemblies Made in the U.S.A. SeunghyunHong1, Lech Muszyński1, RakeshGupta1, Brent Pickett2 Oregon State University 1Department of Wood Science and Engineering, 2Western Fire CenterInc. Sources are noted at the end of this document. Because of the unique structural and fire resistance characteristics of CLT timber walls, floors and mass timber structures, in 2016 the International Code Council appointed a balanced committee of building officials, fire officials, architects, fire protection engineers, and industry experts to examine and propose appropriate code requirements. Workshop ‘Structural Fire Design of Buildings according to the Eurocodes’ – Brussels, 2728 November 2012- 15 Use of massive . As the code gives only limited guidelines on how to achieve a satisfying fire-resistance rating for used connections, a full-scale fire test was the best option to provide ratings for pre-engineered connection systems. Tomazˇ Hozjan Received: 20 March 2020/Accepted: 23 July 2020/Published online: 20 August 2020 Wood Construction(NDS®) and the 2015 International Building Codehas opened up an exciting new chapter in wood construction. The required fire resistance of mass timber elements in Section 602.4 shall be determined in accordance with Section 703.2 or Section 703.3. • IBC Chapter 23 Wood includes information regarding fire-retardant-treated wood. (temperatures, fire spread etc.) Chapter 6, Load-bearing timber structures, introduces the design methods for verification of the structural stability of timber structures in the event of fire, applying the classification for Criterion R for fire resistance (load-bearing function). The fire-resistance rating of building elements shall be as required in Tables 601 and 602 rating of the mass timber elements shall consist of the fire resistance of the unprotected element added to the ORIGINAL ARTICLE Fire resistance of timber-concrete composite slabs A simplified method Anita Ogrin . • IBC Chapter 6 (2015) • IBC Chapter 23 (2015) KEYWORDS: fire performance, timber structures, tests under natural fire conditions, performance based design, efficiency of sprinkler systems NOMENCLATURE LISTING Av 2area of the window opening (m ) – Fire retardant materials are permitted in non-bearing walls with low fire-resistance ratings and in roof construction and decking. Reference is made to Eurocode 5 with respect to charring and strength and stiffness parameters. 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