NFPA 251: Standard Methods of Tests of Fire Resistance of Building Construction and Materials
Current Edition: 2006 Next Edition: Withdrawn

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NFPA 251:
2006 Edition
Item #: 25106
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This document was withdrawn in Fall 2010. Material found in ASTM E119 and UL 263.
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What is NFPA 251?
NFPA 251: Document Scope
1-1.1 These methods of fire tests apply to assemblies of masonry units and to composite assemblies of structural materials for buildings, including bearing and other walls and partitions, columns, girders, beams, slabs, and composite slab and beam assemblies for floors and roofs. They also shall apply to other assemblies and structural units that constitute permanent integral parts of a finished building. 1-1.2* It is the intention of this standard that classifications be based on performance during the period of exposure and shall not be used to determine suitability for use after fire exposure. 1-1.3 The results of these tests are one factor in assessing fire performance of building construction and assemblies. These methods prescribe a standard fire exposure for comparing the performance of building construction assemblies. Application of these test results to predict the performance of actual building construction requires careful evaluation of test conditions.
Official document scope
What does NFPA 251 address?
Table Of Contents.
NFPA 251, 2006 Edition: Archived Revision Information
Report on Proposals (ROP)
Report on Proposals (ROP)
Proposals can be submitted for text to be amended or included in NFPA Codes and Standards. Following the Call for Proposals period, the responsible Technical Committee or Panel holds a meeting to consider and act on all submitted proposals. The committee or panel may also develop its own proposals. A document known as the Report on Proposals (ROP) is prepared containing all the Public Proposals, Technical Committees' action on each Proposal, as well as all Committee-generated proposals. The ROP for the document in question is submitted for the approval of the responsible TC or Panel by a formal written ballot. If the ROP does not receive approval via written ballot in accordance with NFPA rules, the Report is returned to the committee for further consideration and is not published. If the necessary approval is received, the ROP is published in a compilation of Reports on Proposals issued by NFPA twice yearly for public review and comment, and the process continues to the next step. The ROP is published and widely distributed and anyone may download or request a copy.
Report on Comments (ROC)
Report on Comments (ROC)
Once the ROP becomes available, there is a 60-day comment period during which time anyone may submit a public comment on the proposed changes documented in the ROP. The committee or panel reconvenes at the end of the comment period and acts on all public comments. This committee or panel may also develop its own comments. As before, approval obtained via written ballot in accordance with NFPA's Regulations is required on all committee and panel actions. All of this information is compiled into a second Report, called the Report on Comments (ROC), which like the ROP, is published and made available for public review for a seven-week period.
Report on Comments (ROC) (PDF, 109 KB)
Archived revision information
NFPA 251, 2006 Edition: Archived Revision Information
View archived proposals, comments and other records related to the development of this edition.
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