The burning chamber of the building material single burning item test equipment is designed according to the standard requirements of GB/T 20284-2006 "Single burning item test for building materials and products". It is a test device used to determine the fire reactivity of building materials or products (excluding floor coverings and products specified in EC Decision 2000/147/EC) in the single combustion test (SBI).The indoor height of the building material single burning item test combustion chamber is (2.4±0.1)m, and the indoor floor area is (3.0±0.2)X(3.0±0.2)m². Walls shall be constructed of masonry blocks (e.g. porous concrete), plasterboard, calcium silicate boards or other types of panels classified as class A1 or A2 according to EN 13501-1. Individual testing of building materials Individual testing of building materials An opening shall be provided in one wall of the combustion chamber to facilitate the movement of trolleys from an adjacent laboratory into the chamber. The width of the opening shall be at least 1470mm and the height shall be at least 2450mm (the size of the frame). Windows should be respectively set up on the two walls facing the two front surfaces of the vertical sample plate. In order to facilitate the control of the SBI device and the test piece after the trolley is in place, an additional door is required. After the trolley is in place in the burning chamber of the single burning item building material test, the