DIN 4102-15 class B1

Described in this standard fire shaft is one of the test equipment, designed to assess the fire behavior of construction materials. The fire shaft consists of a vertical enclosure with square cross section, in the blown in from below, and a constant air flow from the top of the flue gas is discharged. The fire shaft is a square gas burner flame to the samples, which are vent good arranged in a frame around the burner.