FIRE SEALINGS
Firestop systems are installed at the supply and drainage lines that penetrate LIGNATUR ceiling elements to restore the fire resistance of the entire structural assembly. A wide range of tested and approved firestop systems is available for Europe, Germany, and Switzerland.
Sanitary (heating and drinking water)
Fire sealing systems put to the test
Lignatur and Hilti have successfully conducted fire resistance tests in accordance with the European standard EN 1366-3 (Fire resistance tests for service installations – Part 3: Penetration seals). The results are compiled in classification reports, technical assessments, and approval documents. This provides all planning stakeholders with the necessary documentation to implement multi-storey timber construction projects using LIGNATUR elements in a legally compliant and practical manner.
«Brandschutz im Holzbau» von Hilti mit LIGNATUR
GAS IBS Linz Feuerwiderstandsfähigkeit von Installationskanälen
Early Planning for Project Success
Practical experience and external studies (e.g. Lean Wood, TU Munich, Lucerne University of Applied Sciences) confirm the need for early-stage detailed planning in timber construction. Firestop planning suitable for timber construction requires both practical and cost-efficient solutions based on tested installation details and aligned with the timing of prefabrication processes.
Since penetration planning is implemented during the prefabrication phase, it depends on lead times for material procurement and production. It thus falls within the scope of execution planning and frequently overlaps with other planning and construction phases. Early coordination among all project stakeholders is therefore essential.
The cutting phase is a key link in the project timeline – it significantly impacts the coordination of subsequent trades, execution quality, and ultimately, the total project cost.
Wastewater and Roof Drainage
Wastewater and roof drainage pipes are typically designed using sound-optimized plastic piping systems or non-combustible cast iron pipes (SML pipes).Hilti offers appropriate solutions either as individual penetrations or as part of a riser shaft with a combined firestop system.
Sanitary (heating and drinking water)
Installations for heating and drinking water are carried out using either aluminium composite pipes or non-combustible stainless steel or copper pipes. For pipe insulation, either combustible synthetic rubber or non-combustible mineral wool is used. For these combinations, Hilti offers tested solutions – both for single-pipe penetrations and combined firestop systems in vertical service shafts.
Electrical, single cable, cable bundle
Electrical cables are routed through firestop penetrations either as single cables or as cable bundles or layers, depending on the planned electrical distribution and specific applications (e.g. light sources). A variety of certified products can be used for this purpose, depending on the size of the opening and any requirements for reusability.
Combined fire sealings
When different service lines are combined in a vertical service shaft and pass through a common ceiling opening, firestopping must be carried out using a certified combined penetration seal system. The specified edge distances and spacings between the individual services must be strictly observed.
Ventilation
The installation of the FKRS-EU in wooden surface elements (LIGNATUR elements) is certified and permitted according to the installation and operating manual. The FK2-EU can likewise be installed in solid timber ceilings or timber joist floors. As with the FKRS-EU, the cavities around the installation opening in the ceiling must be sealed with wood to a width of ≥ 100 mm. There is no objection to using the FK2-EU fire dampers already today in timber surface elements (LIGNATUR elements) – provided that the responsible fire protection officer grants approval.
Exhaust systems
Measures to avoid the occurrence of fire through ignition of flammable elements with exhaust systems.
Construction example: installation shaft as a fire protection element for an exhaust system with negative pressure operation
1 connection pitched roof
2 connection flat roof
3 connection floor level
4 connection floor level above firing aggregate at connecting tube
5 connection floor level above firing aggregate
A external diameter exhaust system without fire resistance
B outer edge fire resistance element EI90
v external diameter connecting tube
x2 safety distance from outer edge of exposed exhaust system
The lower slat of the LIGNATUR element can reach up to the exhaust system if the distance demanded is x2 = 50 mm or less.
x3 safety distance from outer edge of exposed connecting tube with temperature class of exhaust system up to T400: x3 = 200 mm
a fire protection element AESTUVER, installation shaft AA EI90 (non-combustible) by Fermacell
b cavity insulation non-combustible
c constructive concrete ≥ 100 mm
d fire resistance board long-term heat resistant
d ≥ 18 mm (e.g. AESTUVER fire protection board d = 25 mm)
e firing aggregate
