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Title: Analytical Methods for Determining Fire Resistance of Timber Members: Chapter 11

Source: SFPE Handbook of Fire Protection Engineering 3rd Edition; pp. 4-257 -- 4-273

Author(s): White

Publication Year: 2002  View PDF »

Category: Journal Articles

Abstract: The fire resistance ratings of wood members and assemblies, 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) Standard E119.1 These ratings are also published in listings, such as the Underwriters Laboratories Fire Resistance Directory2 or the Gypsum Association's Fire Resistance Design Manual,3 and in publications of the model building code organizations. The ratings listed are limited the actual assembly tested and normally do permit modifications such as adding ber size, changing or adding the spacing between members. test results sometimes allows members, thicker or deeper not insulation, changing meminterior finish, or increasing Code interpretation of the the substitution of larger assemblies, smaller member spacing, and thicker protection layers, without reducing the listed rating. A new ASTM standard4 provides guide-lines on such extension of fire endurance results obtained from the standard ASTM E119 fire test. A fire-endurance design procedure for wood beam and columns and a procedure for wood-frame walls have U.S. and Canadian building code acceptance. In Europe, the new Eurocode 55 provides calculation methods at three levels of complexity. In addition, other procedures and models have been proposed or are being developed.

File size: 797 kb(s)

Date posted: 04/05/2010

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