2.6 “B” and “F” Class Doors

 The test specimen should incorporate the maximum size (in terms of both the width and the height) of door leaf or leaves for which approval is to be sought. The maximum size of a door which can be tested will be determined by the requirement to retain certain dimensions of the bulkhead (see 2.6.2.3).

  2.6.2.1 Door furniture such as hinges, locks, latches, shoot bolts, handles, etc. should be constructed of materials having melting points of not less than 850°C unless it can be shown by the fire test that materials having melting points below 850°C do not adversely affect the performance of the door.

  2.6.2.2 The door leaf and frame should be mounted as appropriate into a "B" or "F" class bulkhead of compatible construction, thereby reflecting an actual end use situation. The bulkhead should have dimensions as prescribed in 2.4.1.

 The bulkhead should be of a construction approved by the Administration as having at least a similar classification to that required by the door.

 The method of fixing the door frame to the bulkhead should be as used in practice.

  2.6.2.3 The door should be positioned such that there is a minimum width of the bulkhead of 300 mm to each vertical side of the door and a minimum distance of 100 mm from the top edge of the bulkhead.

  2.6.2.4 The door should be mounted into the bulkhead such that the side expected to give the inferior performance will be exposed to the heating conditions of the test.

 A hinged door should be tested with the door leaf opening away from the heating conditions unless the Administration deems otherwise.

 For sliding doors it is not possible to state generally from which side the door should be tested to give the inferior performance. It will, therefore, be necessary to conduct two separate tests, one with the door mounted to the exposed face and one with the door mounted to the unexposed face of the bulkhead.

  2.6.2.5 For a door which incorporates a ventilation opening within its construction, the ventilation grille(s) should be open at the commencement of the test. Temperature measurements on such a door should not be made over the face of the grille(s).

 The applicant should provide full constructional details of the test specimen in the form of drawings (including a detailed schedule of components) and method of assembly, such that the laboratory is able to confirm agreement between the actual specimen and the drawings and specifications prior to the test. The drawings should include dimensions and details of the following:

• the bulkhead;
• the door leaf and frame construction, including the clearances between the door leaf and the frame;
• the connection of the door frame to the bulkhead;
• the method of securing insulation and details of components used for this purpose (e.g. the type and rate of application of any adhesive);
• fittings such as hinges, shoot bolts, latches, locks, handles, ventilation louvres, escape panels, etc.