WK59635 New Test Method for Determining Flammability of Exterior Wall Assemblies for Mass Timber Multi-story Structures

Work Item

ASTM WK59635

New Test Method for Determining Flammability of Exterior Wall Assemblies for Mass Timber Multi-story Structures

1. Scope

1.1 This fire-test-response test method prescribes a method for qualitatively assessing the fire propagation characteristics of exterior wall assemblies that are constructed using combustible materials or incorporate combustible components. 1.2 The fire exposure in this test method represents a standardized fire exposure resulting from a post-flashover fire in a compartment that vents through a standardized unprotected opening (window) in the exterior wall assembly. 1.3 This test method determines the comparative burning characteristics of exterior wall assemblies by evaluating the fire spread over their exterior surface, the heat flux from the fire plume to the exterior surface of the wall assembly, and the fire spread within the test specimen. 1.4 This fire-test-response test method does not assess the fire resistance or the loadbearing function of the exterior wall assembly. 1.5 Units--The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard. 1.6 Fire testing is inherently hazardous. Adequate safeguards for personnel and property shall be employed in conducting these tests. 1.7 This standard is used to measure and describe the response of materials, products, or assemblies to heat and flame under controlled conditions, but does not by itself incorporate all factors required for fire hazard or fire risk assessment of the materials, products, or assemblies under actual fire conditions. 1.8 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 1.9 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Keywords

fire; flame spread; heat flux; exterior wall; fire plume

Rationale

This proposed new standard entitled Standard Test Method for Determining Flammability of Exterior Wall Assemblies for Mass Timber Multi-story Structures is intended to assist in the assessment of the fire propagation characteristics of exterior wall assemblies used in mass timber buildings that are constructed using combustible materials or that incorporate combustible components.

The title and scope are in draft form and are under development within this ASTM Committee.

Details

Developed by Subcommittee: E05.14

Committee: E05

Staff Manager: Kevin Shanahan

Work Item Status

Date Initiated: 07-05-2017

Technical Contact: Steven Craft

Item: 001

Ballot: E05.14 (18-03)