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Experimental Fire Resistance Test of Timber Structure
Žajdlík, Tomáš ; Šuhajda, Karel
Wooden materials have many advantages for their use in buildings. There are many limitations for their use as with other materials. It's because of the mechanical-physical properties of natural wood. With the use of the wooden structure of the building, the fire load is increased and the requirements for the fire safety solution are stricter. The combustible load-bearing structure influences the design of the building in terms of its function, layout solution, structural materials, and fire safety equipment. The data of the behaviour of wooden materials in the event of fire are necessary for the correct design a timber structure with the required fire resistance. This paper is focused on experimental testing of timber structures exposed to extreme situations such as the effects of fire.
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Fire Resistance Testing of Green Flat Roofs
Hobzová, Klára ; Pilinszki, Martin ; Beneš, Petr
The requirements for the roof covering with a vegetation layer, from the point of view of fire safety, are not currently directly defined in the Czech Republic. According to ČSN P CEN / TS 1187: 2012, four test methods are used for the classification of roofs / roof coverings exposed to external fire. The basis for determining the fire resistance of a green roof are classification protocols prepared according to the standard (roof coverings classified in the Broof (t3) class do not spread fire and prevent ignition of flammable parts of the structure). The article deals with testing the fire resistance of a green intensive roof according to our own methodology, which is based on the Broof (t3) test. The course of temperatures in individual layers of the roof cladding was monitored. The maximum temperature under the grass was determined from the temperature sensors, followed by the maximum temperature rise of 150 mm and 300 mm below the surface. Finally, the extent of flame spread across the surface was measured. The aim was to determine the effect of external fire on the supporting structure of the roof cladding, then to classify the structure into the appropriate classification according to ČSN EN 13501-5: 2017.
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