ISO 834-1:1999 耐火性試験—建物建設の要素—パート1：一般要件 | ページ 2

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and nongovernmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as International Standard requires approval by at least two-thirds of the Member Bodies casting a vote.

International Standard ISO 834-1 was prepared by Technical Committee ISO/TC 92, Firesafety, Subcommittee SC 2, Fire resistance.

This first edition of ISO 834-1 cancels and replaces ISO 834:1975, together with Amendment 1:1979 and Amendment 2:1980, of which it constitutes a technical revision. The revision has been made because of the need for more accuracy and reproducibility in the test method. Its provisions are supplemented by the commentary material contained in part 3.

ISO 834 consists of the following parts under the general title Fire-resistance tests — Elementsof building construction:

• Part 1: General requirements
• Part 3: Commentary on test method and test data application
• Part 4: Specific requirements for loadbearing vertical separating elements
• Part 5: Specific requirements for loadbearing horizontal separating elements
• Part 6: Specific requirements for loadbearing beams
• Part 7: Specific requirements for loadbearing columns
• Part 8: Specific requirements for non-loadbearing vertical separating elements
• Part 9: Specific requirements for non-loadbearing horizontal separating elements
• Part 10: Method to determine the contribution of applied protection materials to structural metallic elements
• Part 11: Method to assess the contribution of applied protection materials to structural metallic elements

Introduction

Significant changes with respect to ISO 834:1975 are requirements for the following:

• accuracy of measuring equipment;
• tolerances applied to the deviation of the curve of the average furnace temperature with respect to the standard heating curve;
• pressure conditions for vertical and horizontal elements;
• specification of test load;
• conditioning;
• application of instrumentation;
• criteria respecting loadbearing capacity.

In general, the revision reflects the objective of Working Group WG 1 in providing a standard that is arranged in logical sequence and providing for increased precision in the development and application of the test data, as well as repeatability of the results using the same and different equipment. It is planned to enhance the repeatability aspect by the development, in the near future, of a precision calibration routine which will address parameters such as temperature uniformity, pressure gradients, oxygen concentration, furnace lining materials, and others.

1 Scope

This part of ISO 834 specifies a test method for determining the fire resistance of various elements of construction when subjected to standard fire exposure conditions. The test data thus obtained will permit subsequent classification on the basis of the duration for which the performance of the tested elements under these conditions satisfies specified criteria.

2 Normative references

The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 834 . At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO 834 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards.

3 Definitions

For the purposes of this part of ISO 834, the definitions given in ISO 13943 and the following definitions apply.