Standard No.:	GB/T 29416-2026
English Name:	Test method for fire-resistant performance of external wall insulation systems applied to building facades
Chinese Name:	建筑外墙外保温系统的防火性能试验方法
Professional Classification:	GB    National Standard
Source Content Issued by:	SAMR, SAC
Issued on:	2026-03-31
Implemented on:	2026-10-1
Status:	to be valid
Superseding:	GB/T 29416-2012 Test method for fire-resistant performance of external wall insulation systems applied to building facades
Target Language:	English
File Format:	PDF
Word Count:	10500 words
Translation Price(USD):	315.0
Delivery:	via email in 1~5 business day

GB/T 29416-2026 Test method for fire-resistant performance of external wall insulation systems applied to building facades English, Anglais, Englisch, Inglés, えいご This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered. ICS CCS National Standard of the People's Republic of China ‌GB/T 29416-2026 Replaces GB/T 29416-2012 Test method for fire-resistant performance of external wall insulation systems applied to building facades 建筑外墙外保温系统的防火性能试验方法 Issue date: 2026-03-31 Implementation date: 2026-10-01 Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China the Standardization Administration of the People's Republic of China Contents Foreword 1 Scope 2 Normative References 3 Terms and Definitions 4 Test Apparatus 4.1 General Requirements 4.2 Substrate Wall 4.3 Combustion Chamber 4.4 Heat Source 4.5 Collapse Zone 4.6 Measurement System 5 Test Specimens 5.1 General Requirements 5.2 Specimen Dimensions and Installation 5.3 Basic Performance Characteristics of the Specimen 6 Conditioning 7 Test Procedure 7.1 Environmental Conditions 7.2 Data Acquisition 7.3 Ignition Source 7.4 Test Observation and Recording 7.5 Test Duration 7.6 Premature Termination of the Test 8 Posttest Examination 9 Determination of Test Results 10 Test Report Annex A (Normative) Wood Crib Heat Source A.1 Materials A.2 Preparation of Wood Crib Heat Source Annex B (Normative) Test Method for Smouldering Characteristics B.1 General B.2 Test Apparatus B.3 Test Procedure B.4 Determination of Test Results Annex C (Informative) Application Range of Test Results C.1 Types of External Insulation Systems C.2 Thickness of Insulation Layer C.3 Cavity Thickness C.4 Density of Insulation Material C.5 Types of Substrate Wall C.6 Fire Separation Details Bibliography Fire resistance performance test method for external wall insulation systems applied to building facades Safety warning: All personnel organising or participating in this test shall be aware of the potential hazards. During the test, the external insulation system may undergo fullscale combustion and generate toxic and/or harmful smoke and fumes. Mechanical hazards and operational risks may also occur during specimen installation, test execution, and cleaning of debris after the test. Therefore, the laboratory shall be equipped with personal protective equipment for test personnel and appropriate firefighting facilities. All potential hazards and health risks shall be assessed and safety warnings issued. Relevant personnel shall receive the necessary training to ensure that they operate in accordance with the prescribed safety procedures. 1 Scope This document describes a fire resistance performance test method for external wall insulation systems applied to building facades, and specifies the test apparatus, test specimens, conditioning, test procedure, posttest examination, determination of test results, test report, etc. This document applies to the fire resistance performance testing of nonloadbearing external insulation systems installed on building external walls. This document does not apply to the fire resistance performance testing of external insulation systems of breathable glass curtain wall structures installed on building external walls. 2 Normative References The following documents are essential for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB/T 5907 (all parts) Fire protection vocabulary GB/T 6343 Foams and rubbers — Determination of apparent density GB 8624 Classification for burning behaviour of building materials and products GB/T 18404 Mineral insulated thermocouple cables and thermocouples 3 Terms and Definitions For the purposes of this document, the terms and definitions given in GB/T 5907 and the following apply. 3.1 external wall insulation systems applied to building facade An enclosure structural system having thermal insulation properties that uses a specified construction method to install various materials on the external surface of a building external wall. NOTE: Hereinafter referred to as “external insulation system”. 3.2 level 1 The horizontal reference line located 2500 mm above the top of the combustion chamber opening of the test apparatus. 3.3 level 2 The horizontal reference line located 5000 mm above the top of the combustion chamber opening of the test apparatus. 3.4 level 3 The horizontal reference line located 7500 mm above the top of the combustion chamber opening of the test apparatus. 3.5 initial temperature T₀ The average temperature of the external thermocouples at level 1 at the start of ignition. 3.6 sustained visible flaming Continuous flame observed during the test lasting for more than 60 s. 3.7 burning debris Debris detached from the specimen during the test that exhibits sustained visible flaming (3.6). 3.8 collapse zone The ground area measuring 2450 mm in length and 1200 mm in width located at the intersection of the main wall and the auxiliary wall of the test apparatus. 4 Test Apparatus 4.1 General requirements The test apparatus for the fire resistance performance of external insulation systems shall generally consist of a substrate wall, a combustion chamber, a heat source, a collapse zone, a measurement system, etc. The test apparatus shall be built indoors in a building with sufficient space. The internal space shall be large enough to meet the requirements for construction of the test apparatus, installation and construction of test specimens, test operations, and test safety. The clear height should preferably not be less than 18 m. At the same time, the space shall allow for free combustion of the heat source and the specimen during the test (the test behaviour shall be fuelcontrolled, not ventilationcontrolled). The test apparatus shall be durable and shall not undergo deformation or damage that would affect the test results during the test. 4.2 Substrate wall The substrate wall of the test apparatus consists of a main wall and an auxiliary wall, built vertically using autoclaved aerated concrete blocks with a dry density of not less than 600 kg/m³. Both the main wall and the auxiliary wall shall have a height of not less than 9700 mm and a thickness of not less than 300 mm. The width of the main wall shall be not less than 2600 mm, and the width of the auxiliary wall shall be not less than 1500 mm, as shown in Figures 1a) and 1b). The main wall and the auxiliary wall form a 90° angle, as shown in Figure 1c). 4.3 Combustion chamber The combustion chamber of the test apparatus is located at the bottom of the main wall, and its outer edge is flush with the main wall surface. The opening dimensions shall be: height (2000 ± 100) mm, width (2000 ± 100) mm. The internal dimensions: height (2300 ± 50) mm, width (2000 ± 50) mm, depth (1000 ± 50) mm. The distance from the combustion chamber opening to the outer surface of the external insulation system specimen on the auxiliary wall shall be (160 to 360) mm. The top of the opening shall be protected with refractory material. 4.4 Heat source The heat source used in the test shall be a wood crib heat source conforming to the provisions of Annex A. 4.5 Collapse zone The collapse zone of the test apparatus shall be marked on the floor of the test apparatus (see Figure 2). 4.6 Measurement system 4.6.1 General The measurement system consists of thermocouples, a data acquisition system, video cameras, wind speed measuring equipment, timing devices, etc. 4.6.2 Thermocouples