BS 8414-2:2020,Fire performance of external cladding systems – Part2:Test method for non-loadbearing external cladding systems fixed to, and supported by, a structural steel frame.You can download BS 8414-2:2020 pdf.
This part of BS 8414 provides a test method for determining the fire performance characteristics of non-loadbearing external cladding systems when fixed to, and supported by, a structural steel frame and exposed to an external fire under controlled conditions. The peak fire exposure is intended to be representative of an external fire source or a fully developed (post-flashover) fire in a room venting from an aperture that exposes the cladding to the effects of external flames.
This part of BS 8414 is solely intended to give an indication of fire spread across or within an external cladding system. The purpose of the test is to provide data to enable evaluation of the fire performance of the components when combined to form a complete cladding system.
This part of BS 8414 does not apply to non-loadbearing external rainscreen overcladding systems or external wall insulation systems applied to the face of a building, the fire testing of which is covered in BS 8414-1.
This part of BS 8414 does not cover the performance of glass or its supporting frame intended for glazed window openings.
This part of BS 8414 does not apply to glazed curtain walling systems.
This part of BS 8414 does not test the total configuration of a construction incorporating additional windows, doors, balconies or ancillary penetrations.
This part of BS 8414 does not cover exposure to radiant heat from a fire in an adjacent building.
In this test, the external cladding system is fixed to, and supported by, a structural steel frame in the form of a main face together with a perpendicular side wing, with the cladding system attached in the manner specified by the test sponsor. At the base of the vertical system, an opening is provided through which the fire can vent.
The test method is designed to provide benchmarking data to enable the classification of the non-loadbearing external cladding system. The extent of damage caused to the external cladding system is recorded, particularly the ability of the external cladding system to resist the propagation of the fire upwards or penetration through the system. Any falling debris and fire penetration are recorded.