* Refer to figures 1 and 2.
The fire test compartment should be constructed using 45 mm
by 90 mm wood studs (or equivalent) and non-combustible wall
boards, having a nominal thickness of between 10 and 15 mm.
The walls and the ceiling should not be insulated. The
compartment should be fitted with a doorway opening, to
allow easy access. This doorway should be sealed closed
during the tests.
The compartment should be reasonably air-tight and, if
considered necessary, all gaps between parts of the
compartment should be sealed using high-temperature
The inner dimensions of the compartment should be:
- length: 2,400 mm;
- width: 1,200 mm; and
- height: 2,400 mm.
The bottom of the walls should be positioned 150 mm above
floor level, in order to provide a gap around the bottom
perimeter of the compartment, to allow the inflow of fresh
5.3 Flame screen
The top part of the test compartment should be fitted with a
flame screen, in order to prevent flames and hot combustion
gases from flowing directly in to the high-expansion foam
The screen should be made from a perforated (approximately
50% free area) steel sheet. It should cover the width of the
test compartment and should extend 600 mm down from the
5.4 Position of the high-expansion foam generator
The high-expansion foam generator should be positioned
centrically through one of the short sides of the fire test
compartment, with its centreline 200 mm below the ceiling.
The cone end of the generator should be located 360 mm
outside the short side of the fire test compartment.
5.5 Position of the propane gas burner
The propane gas burner should be positioned at the opposite
part of the test compartment, relative to the position of
the high-expansion foam generator.
The horizontal distance measured from the back and long side
walls, should be 600 mm, respectively. The propane gas
burner should be elevated, such that its top is 500 mm above