Determination of the critical conditions leading to the ignition of decking slabs by flaming firebrands

This study investigates the ignition by flaming firebrands of two decking slabs used in French dwellings located Wildland–Urban Interface. The first slab was made pine and second one a thermoplastic composed polypropylene calcium carbonate. Flaming were produced heating igniting wood chips different shapes (square, longitudinal rectangular) with cone calorimeter. generated preserved their shape during heating. Their projected area between 0.07 12.00 cm2 mass ranged from 0.57 mg to 2.66 g. location firebrands, minimal number needed ignite analysed order determine critical conditions ignition. only occurred when positioned at interstices wooden against leg slabs. No on surface slab. A minimum 0.31 g 0.80 necessary ones, respectively. Less than ones.