Descriptors | Density, Ventilation ductwork, Openings (construction spaces), Fire spread prevention, Testing conditions, Ducts (building services), Fire resistance, Horizontal, Test specimens, Building services, Circular shape, Vertical, Height, Thickness, Supports, Joints, Reports, Fire stops, Design, Test duration, Rectangular shape, Fire tests, Fire safety in buildings, Walls, Thermocouples, Length, Test equipment, Width, Thermal insulation, Ventilation equipment, Size, Diameter |