Fire Resistance
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Fire resistance With the constructional components dimensioned according to VKF fire protection application Nr. 15421 or ETA-11 / 0137, LIGNATUR elements reach fire resistance up to REI90. In Switzerland, they have the fire index (BKZ) 4.3 (medium flammability, low smoke production) with or without acoustic perforations. In the ETA-11 / 0137 their burning behaviour is stated according to EN 13501-1 with D-s1, d0 (normal flammability – almost no smoke production, no dripping). Based on these facts the following component resistances result for the basic constructions: 1 2 3 4 30 minutes fire...

In multi-storey timber engineering, fire protec- RCQUirCmCntS *'on 'sP0SS'ble based on multiple examined con- structions and concepts up to high-rise construc- tor fire resistance tions. This applies to all of Europe. Requirements in Switzerland for floors in housing, commercial and educational buildings are shown 1 detached single house 2 block of flats (MFH) up to 3 levels In 2015 fire protection regulations in Switzerland

All the following information and calculations are based on the assumptions stated here: Residual section after fire load dimensional charring rate b1 at the layers = 0.8mm/min • charring rate b at the webs around the ­ 2 insulation b2 = 1.6mm/min for rockwool b2 = 0.9 ∙ √ (450 / rIso)mm/min for wood fibre rIso = density of wood fibre • layer accounting for loss of strength d = 7mm red • charring * fire test with surface element filled with rock wool, Type: «REI60 / EI30 (nbb)» respectively «REI60 / K260» Effective charring depth: def = dchar + dred Effective charring depth: def = dchar +...

Residual section of acoustic element after fire load The charring rate b0 of the acoustic slat can be described based on the following parameters: ­ AAkustik (mm2) = perforation area dAkustik (mm) = perforation area bAkustik (mm) = position of perforation in relation to the timber web t i (mm) = thickness of the acoustic slat The factor k summarises the resulting influence of the parameters. The charring rate b1 can be calculated depending on the factor k. A k = d Akustik . 103 / (bAkustik 1.5 . ti) Akustik b1 = 0.22 . k + 0.72 The charring rate b2 at the webs around the wood fibre absorber...

Joint detail under fire load Basic boundary conditions for space-enclosing and heat insulation effects must be met in the event of fire. LIGNATUR floors and roofs with fire resistance class REI30, REI60 and REI90 have to be installed according to ETA-11 / 0137 with the appropriate joints, shown on the left. They already reach EI30, EI60 or EI90, so that floor and roof structures can be chosen freely without ­further requirements.

Fire stops in building components with fire compartments Installation for building services can cause pene­ tration in space-enclosing elements. Fire regulations define the requirements for the installations. Through appropriate measures, the space enclosure of the plane element must not be affected, but also a transmission of fire into the building element must be avoided over a sufficient period of time. Suitable products for this are available on the market. The configuration on the left shows possible ways of sealing as a base for planning. But it is by no means complete. Individual...

Measures to avoid the occurrence of fire through ignition of flammable elements with exhaust systems. Exhaust systems Construction example: installation shaft as a fire protection element for an exhaust system with negative pressure operation connection pitched roof connection flat roof connection floor level connection floor level above firing aggregate at connecting tube connection floor level above firing aggregate external diameter exhaust system without fire resistance outer edge fire resistance element EI90 external diameter connecting tube safety distance from outer edge of exposed...