Lightning protection guide by OBO

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Last revision 2020

Vydal: OBO BETTERMANN s. r. o. Autor: OBO BETTERMANN

Strana 158 z 288

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4571/1.4404 Material 316, material no. 1. 1. Measurement and documentation TBS Blitzschutz-Leitfaden 2018 / en / 2020/01/10 14:42:40 14:42:40 (LLExport_02613) / 2020/01/10 14:42:54 14:42:54 158 Chapter The external lightning protection system .4404 Material 316, material no. 1. Connection straps must marked clearly. cm concrete cover routed or made stainless steel 316, material no.4404 Material with min. cm concrete cover routed or made stainless steel 316, material no.4571/1.5 length Unreinforced foundations/ foundations made of fibrated concrete/ rolled concrete yes no Material with least cm concrete cover yes yes Ring earth electrodes out- side the floor plate/insula- tion Grid width ≤ m Ring earth electrodes out- side the floor plate/insula- tion Grid width ≤ m Foundation earth elec- trodes all individual foundations into closed ring Grid width ≤ m ≤ m Foundation earth elec- trodes Grid width of ≤ m Foundation earth elec- trodes Grid width of ≤ m Material 316, material no. for structural supports present? no Reinforced foundations present? no yes yes Lightning protection measures required? Equip each foundation with a foundation earth elec- trode 2. 1.Start planning Increased earth transition resistance exists, e. through "black trough", "white trough", fully surrounding perimeter insulation? no Individual foundations e.4404 Material with min.4404 Functional equipotential bonding cable within the floor plate, grid width and connection the reinforcement every m A connection the foundation earth electrodes with the reinforcement every m One connection between the ring earther and functional equipotential bonding cable lightning protection sys- tems least every least one connection per conductor Connection parts for connection the main earthing rail, down-conductors lightning protection system, con- nection straps should have length least 1.g.4571/1. 1.4571/1.g.5 be- fore their entrance into the appropriate room.4571/1