Abstract
The Danish prescriptive code for fire protection of buildings [1] require an insulation material which holds a reaction to fire class poorer than class D-s2,d2 to be protected with at least a covering class K1 10 B-s1,d0 (or a protecting construction of class EI 30). According to the Danish approach the reaction to fire class of insulation materials must be evaluated on the insulation alone, that is, without any kind of facing [2]. In order to find the best solution to comply with the prescriptive code a Danish manufacturer of steel faced sandwich panels with PUR (polyisocyanurate) insulation asked DBI to carry out some exploratory fire tests to evaluate 4 different solutions.
Highlights
The Danish prescriptive code for fire protection of buildings [1] require an insulation material which holds a reaction to fire class poorer than class D-s2,d2 to be protected with at least a covering class K1 10 B-s1,d0
Except for the reduced dimensions of the test specimens the test was run according to EN 14135 [3], that is, a 10 minute test with a heat exposure following ISO 834, though, due to a malfunctioning gas burner there was a substantial deviation from the prescribed temperature curve
After the 10 minute fire test the concrete frame was removed from the furnace and the specimens were detached as quickly as possible to allow for visual observation of possible damages to the PUR insulation
Summary
The Danish prescriptive code for fire protection of buildings [1] require an insulation material which holds a reaction to fire class poorer than class D-s2,d2 to be protected with at least a covering class K1 10 B-s1,d0 (or a protecting construction of class EI 30). In order to find the best solution to comply with the prescriptive code a Danish manufacturer of steel faced sandwich panels with PUR (polyisocyanurate) insulation asked DBI to carry out some exploratory fire tests to evaluate 4 different solutions. The frame was placed at the top side of a so called “model test furnace”. This test is referred to as the “4-hole test”. 10 mm plaster, 15 mm glass fibre reinforced concrete plate, PUR insulation, 0.55 steel sheet Description of specimens (from exposed side): 1. 16 mm cement based chipboard, PUR insulation, 0.55 mm steel sheet 2. 0.55 steel sheet, 10 mm fibre gypsum board, PUR insulation, 0.55 mm steel sheet 3. 10 mm plaster, 30 mm mineral wool, PUR insulation, cardboard 4. 10 mm plaster, 15 mm glass fibre reinforced concrete plate, PUR insulation, 0.55 steel sheet
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
