GB/T 9978.4-2008 Fire-resistance tests－Elements of building construction－Part 4: Specific requirements for loadbearing vertical separating elements (English)
GB/T 9978.4-2008 Fire-resistance tests - Elements of building construction - Part 4: Specific requirements for loadbearing vertical separating elements
1 Scope
This part of GB/T 9978 specifies the procedures to be followed for determining the fire resistance of loadbearing vertical separating elements when exposed to heating on one face.
This part is applicable to fire resistance test of loadbearing vertical separating elements; if other untested forms of construction meet the conditions specified in the direct application scope provided in this part and the fire resistance performance results of the building elements that have been subjected to the fire resistance test in accordance with this part may be applied to similar untested building elements.
2 Normative references
The following documents contain provisions which, through reference in this part of GB/T 9978, constitute provisions of this part. For dated references, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply to this part. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document applies.
GB/T 5907 Fundamental terminology of fire protection - Part 1 [) This standard, based on the integration and revision of GB/T 5907-1986, GB/T 14107-1993, and GB/T 16283-1996, will be published with the general title "Fundamental terminology of fire protection" and is divided into five parts. Among all the parts, Part 2 is GB/T 5907.2 Fundamental terminology of fire protection - Part 2: Fire safety, which is modified with relation to ISO 13943:2000.])
GB/T 9978.1 Fire-resistance tests - Elements of building construction - Part 1: General requirements (GB/T 9978.1-2008, ISO 834-1:1999, MOD)
GB/T 9978.3 Fire-resistance tests - Elements of building construction - Part 3: Commentary on test method and test data application (GB/T 9978.3-2008, ISO/TR 834-3:1994, MOD)
3 Terms and definitions
For the purposes of this part, the terms and definitions given in GB/T 5907 and GB/T 9978.1 and the following apply.
vertical separating elements
vertically oriented building elements, such as walls which are required to act as fire separations or fire barriers; which divide buildings into fire compartments or fire zones, or which separate a building from adjoining buildings in order to resist the spread of fire to or from adjoining compartments or buildings 3.2
loadbearing wall
vertical separating element of a building construction which is loadbearing
3 Symbols and abbreviated terms
For the purposes of this document, the symbols and abbreviations given in GB/T 9978.1 apply.
4 Symbols and abbreviated terms
For the purposes of this document, the symbols and abbreviations given in GB/T 9978.1 apply.
5 Test equipment
Equipment employed in the conduct of this test consists of a furnace, loading equipment, restraint and support frames and instrumentation as specified in GB/T 9978.1 . The schematic diagram of the test equipment is illustrated in Figure 1.
1—— Hydraulic ram;
2—— Load transducer;
3—— Load-distribution beam;
4—— Bedding material;
5—— Test specimen;
6—— Fibre insulation;
7—— Linear transducer;
8—— Test frame.
Figure 1 Schematic diagram of loading test setup for load-bearing walls
6 Test conditions
6.1 General
The heating and pressure conditions, the furnace atmosphere and the loading conditions shall conform to those specified in GB/T 9978.1.
6.2 Restraint and boundary conditions
Restraint and boundary conditions shall comply with the requirements given in GB/T 9978.1 and the requirements of this part.
6.3 Loading conditions
6.3.1 All loadbearing vertical separating elements shall be tested when subjected to loads, calculated in accordance with subclauses 5.3 or 5.6 of GB/T 9978.1 in accuracy, in consultation with the sponsor to provide the conditions the structure is designed to accommodate. The material properties utilized in the calculation of the load shall be clearly indicated and their source given. For vertical separating elements which contain discreet loadbearing members, the load shall be proportional to the number of these members.
6.3.2 When the height of the proposed test specimen is greater than can be accommodated in the test furnace, the load shall be adjusted to be compatible with the width-height ratio of the loadbearing elements of the specimen being tested. Therefore, the sponsor shall provide the design load value after the size adjustment of the specimen.
6.3.3 Vertical load shall be applied to either the top or bottom edge. Any unrestrained edges shall be sealed with non-restraining and non-combustible material in the gap with the specimen frame.
6.3.4 The load shall be applied either uniformly along the whole width of the specimen by a loading beam or by individual loading jacks at selected points on all the horizontal planes, when this is more representative of the use of the construction. When the test specimen is designed to be eccentrically loaded, or when only one leaf of a cavity construction is to be loaded, these conditions shall be reproduced in the specimen.
6.3.5 When uniformly loaded, the test specimen shall be erected within a loading frame having appropriate stiffness in relation to the test construction and to the loads which will be imposed upon it during the test. As a guide, the load distribution members should not deflect more than 1 mm under a force of 10 kN applied at the centre span (load distribution structure), in the plane of the frame.
6.3.6 The loading system shall be capable of compensating for the maximum allowable deformation of the specimen.
6.3.7 Where both leaves of a double leaf wall are to be loaded, provisions shall be made to load each leaf independently. The loading equipment shall be able to apply a load of different magnitude to one leaf from the other when this is appropriate.
7 Test specimen preparation
7.1 Specimen design
Contents
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
3 Symbols and abbreviated terms
4 Symbols and abbreviated terms
5 Test equipment
6 Test conditions
7 Test specimen preparation
8 Application of instrumentation
9 Test method
10 Judgment criteria
11 Test validity
12 Expression of results
13 Test report
Annex A (Informative) Guidelines for direct application of test results
Annex B (Informative) Comparison of this standard and ISO 834-4:2000 in terms of clause numbers
Annex C (Informative) Technical differences between this part and ISO 834-4:2000 and their justifications
Bibliography
GB/T 9978.4-2008 Fire-resistance tests－Elements of building construction－Part 4: Specific requirements for loadbearing vertical separating elements (English)
Standard No.
GB/T 9978.4-2008
Status
valid
Language
English
File Format
PDF
Word Count
8000 words
Translation Price(USD)
240.0
Implemented on
2009-3-1
Delivery
via email in 1 business day
Detail of GB/T 9978.4-2008
Standard No.
GB/T 9978.4-2008
English Name
Fire-resistance tests－Elements of building construction－Part 4: Specific requirements for loadbearing vertical separating elements
GB/T 9978.4-2008 Fire-resistance tests - Elements of building construction - Part 4: Specific requirements for loadbearing vertical separating elements
1 Scope
This part of GB/T 9978 specifies the procedures to be followed for determining the fire resistance of loadbearing vertical separating elements when exposed to heating on one face.
This part is applicable to fire resistance test of loadbearing vertical separating elements; if other untested forms of construction meet the conditions specified in the direct application scope provided in this part and the fire resistance performance results of the building elements that have been subjected to the fire resistance test in accordance with this part may be applied to similar untested building elements.
2 Normative references
The following documents contain provisions which, through reference in this part of GB/T 9978, constitute provisions of this part. For dated references, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply to this part. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document applies.
GB/T 5907 Fundamental terminology of fire protection - Part 1 [) This standard, based on the integration and revision of GB/T 5907-1986, GB/T 14107-1993, and GB/T 16283-1996, will be published with the general title "Fundamental terminology of fire protection" and is divided into five parts. Among all the parts, Part 2 is GB/T 5907.2 Fundamental terminology of fire protection - Part 2: Fire safety, which is modified with relation to ISO 13943:2000.])
GB/T 9978.1 Fire-resistance tests - Elements of building construction - Part 1: General requirements (GB/T 9978.1-2008, ISO 834-1:1999, MOD)
GB/T 9978.3 Fire-resistance tests - Elements of building construction - Part 3: Commentary on test method and test data application (GB/T 9978.3-2008, ISO/TR 834-3:1994, MOD)
3 Terms and definitions
For the purposes of this part, the terms and definitions given in GB/T 5907 and GB/T 9978.1 and the following apply.
vertical separating elements
vertically oriented building elements, such as walls which are required to act as fire separations or fire barriers; which divide buildings into fire compartments or fire zones, or which separate a building from adjoining buildings in order to resist the spread of fire to or from adjoining compartments or buildings 3.2
loadbearing wall
vertical separating element of a building construction which is loadbearing
3 Symbols and abbreviated terms
For the purposes of this document, the symbols and abbreviations given in GB/T 9978.1 apply.
4 Symbols and abbreviated terms
For the purposes of this document, the symbols and abbreviations given in GB/T 9978.1 apply.
5 Test equipment
Equipment employed in the conduct of this test consists of a furnace, loading equipment, restraint and support frames and instrumentation as specified in GB/T 9978.1 . The schematic diagram of the test equipment is illustrated in Figure 1.
1—— Hydraulic ram;
2—— Load transducer;
3—— Load-distribution beam;
4—— Bedding material;
5—— Test specimen;
6—— Fibre insulation;
7—— Linear transducer;
8—— Test frame.
Figure 1 Schematic diagram of loading test setup for load-bearing walls
6 Test conditions
6.1 General
The heating and pressure conditions, the furnace atmosphere and the loading conditions shall conform to those specified in GB/T 9978.1.
6.2 Restraint and boundary conditions
Restraint and boundary conditions shall comply with the requirements given in GB/T 9978.1 and the requirements of this part.
6.3 Loading conditions
6.3.1 All loadbearing vertical separating elements shall be tested when subjected to loads, calculated in accordance with subclauses 5.3 or 5.6 of GB/T 9978.1 in accuracy, in consultation with the sponsor to provide the conditions the structure is designed to accommodate. The material properties utilized in the calculation of the load shall be clearly indicated and their source given. For vertical separating elements which contain discreet loadbearing members, the load shall be proportional to the number of these members.
6.3.2 When the height of the proposed test specimen is greater than can be accommodated in the test furnace, the load shall be adjusted to be compatible with the width-height ratio of the loadbearing elements of the specimen being tested. Therefore, the sponsor shall provide the design load value after the size adjustment of the specimen.
6.3.3 Vertical load shall be applied to either the top or bottom edge. Any unrestrained edges shall be sealed with non-restraining and non-combustible material in the gap with the specimen frame.
6.3.4 The load shall be applied either uniformly along the whole width of the specimen by a loading beam or by individual loading jacks at selected points on all the horizontal planes, when this is more representative of the use of the construction. When the test specimen is designed to be eccentrically loaded, or when only one leaf of a cavity construction is to be loaded, these conditions shall be reproduced in the specimen.
6.3.5 When uniformly loaded, the test specimen shall be erected within a loading frame having appropriate stiffness in relation to the test construction and to the loads which will be imposed upon it during the test. As a guide, the load distribution members should not deflect more than 1 mm under a force of 10 kN applied at the centre span (load distribution structure), in the plane of the frame.
6.3.6 The loading system shall be capable of compensating for the maximum allowable deformation of the specimen.
6.3.7 Where both leaves of a double leaf wall are to be loaded, provisions shall be made to load each leaf independently. The loading equipment shall be able to apply a load of different magnitude to one leaf from the other when this is appropriate.
7 Test specimen preparation
7.1 Specimen design
Contents of GB/T 9978.4-2008
Contents
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
3 Symbols and abbreviated terms
4 Symbols and abbreviated terms
5 Test equipment
6 Test conditions
7 Test specimen preparation
8 Application of instrumentation
9 Test method
10 Judgment criteria
11 Test validity
12 Expression of results
13 Test report
Annex A (Informative) Guidelines for direct application of test results
Annex B (Informative) Comparison of this standard and ISO 834-4:2000 in terms of clause numbers
Annex C (Informative) Technical differences between this part and ISO 834-4:2000 and their justifications
Bibliography
