GB/T 9978.1-2008Fire-resistance tests -- Elements of building construction -- Part 1: General requirements (English PDF)

Foreword

GB/T 9978 "Fire-resistance Tests - Elements of Building Construction" is

divided into the following parts.

-- Part 1.general requirements;

-- Part 2.calibration of furnace for fire resistance test;

-- Part 3.commentary on test method and test data application;

-- Part 4.specific requirements for load bearing vertical separating

elements;

-- Part 5.specific requirements for load bearing horizontal separating

elements;

-- Part 6.specific requirements for beams;

-- Part 7.specific requirements for columns;

-- Part 8.specific requirements for non-load bearing vertical separating

elements;

-- Part 9.specific requirements for non-load bearing ceiling elements;

...

This Part is Part 1 of GB/T 9978.

This Part modifies-adopts ISO 834-1.1999 "Fire resistance test - Elements of

building construction - Part 1.General requirements" (English edition).

This Part was drafted according to ISO 834-1.1999.The comparison list of the

chapter and article numbers in this Part and those in ISO 834-1.1999 is listed

in Appendix A.

When referring to ISO 834-1.1999, some amendments were made in this Part.

The relevant technical differences have been written in the text and marked by

vertical line in the margin of relevant clauses. The technical differences and

their causes are listed in Appendix B for reference.

Compared with ISO 834-1.1999, the following editorial changes were made in

this Part;

-- "this Part of ISO 834" was modified as "this Part of GB/T 9978";

-- The comma "," acting as decimal point was replaced by the decimal point

".";

-- The foreword and introduction of international standard were deleted.

This Part replaces GB/T 9978-1999 "Fire-resistance Tests - Elements of

Building Construction".

The main differences between this Part and GB/T 9978-1999 are as follows.

-- The specific contents of terms and definitions were added;

-- Type and requirements of thermocouple were modified;

-- Requirements of temperature deviation in furnace were modified;

-- Requirements of furnace pressure were modified;

-- Determination criteria were modified;

-- Informative Appendix A was added (see Appendix A);

-- Informative Appendix B was added (see Appendix B).

Appendix A and Appendix B of this Part are informative.

This Part was proposed by the Ministry of Public Security of the People's

Republic of China.

This Part shall be under the jurisdiction of Subcommittee 8 on Fire Endurance

of Building Elements of National Technical Committee on Fire Protection

(SAC/TC 113/SC 8).

Drafting organization of this Part. Tianjin Fire Research Institute of ministry of

public security.

Chief drafting staffs of this Part. Zhao Huali, Han Weiping, Huang Wei, Dong

Xuejing, Chen Yingxiong, Li Qiang, Li Bo, Li Xijin, Ruan Tao, Diao Xiaoliang

and Bai Shuying.

The previous editions replaced by this Part are as follows.

-- GB/T 9978-1988, GB/T 9978-1999.

Fire-resistance tests - Elements of building

construction – Part 1.General requirements

1 Scope

This Part of GB/T 9978 specifies the test method for determining the fire

resistance of various elements of construction when subjected to standard fire

exposure conditions.

2 Normative References

The following standards contain provisions which, through reference in this

Part of GB/T 9978, constitute the provisions of this Part. For dated reference,

the subsequent amendments to (excluding correction), or revisions of these

publications do not apply.

3 Terms and Definitions

The terms and definitions established in GB/T 5907 AND the following ones

are applicable to this Part of GB/T 9978.

4 Symbols and Abbreviations

The following symbols and abbreviations are applicable to this Part of GB/T

9978.

5 Test Equipment

The test furnaces shall be designed to employ liquid or gaseous fuels and shall

be capable of.

Two types of gap gauge, as shown in Figure 6, shall be available for the

measurement of integrity. They shall be made of cylindrical stainless steel rod

of 6 mm ± 0.1 mm and 25 mm ± 0.2 mm diameter. They shall be provided with

insulated handles of suitable Length.

6 Test Conditions

The furnace shall be operated such that a pressure of 20 Pa is established at a

position 100 mm below the underside of the test specimen or the notional

ceiling level when testing beams.

The furnace shall be installed in a laboratory of sufficient size. The initial

ambient temperature shall be recorded in the test.

7 Test Preparation

The test specimen shall be normally full size. When the specimen cannot be

tested full size, the specimen size shall be in accordance with the test standard

for the individual elements

8 Application of Instrumentation

Two pressure sensors shall be provided in the same horizontal plane but in

different positions relative to the perimeter of the test specimen. One shall be

used for control and the second shall serve as a check on the first.

9 Test Method

From the commencement of the test, the following measurements and

observations shall be taken, where relevant.

The furnace pressure shall be measured and recorded continuously or at

intervals not exceeding 5 min at the control point.

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