Service type | Fire resistance ¹ | Supporting construction | | None (Blank seal) | 4 hrs | 2 hrs | Masonry walls and concrete floors | | up to 2 hrs | 2 hrs | Plasterboard walls | | Individual cables | up to 4 hrs | ≥ 1 hr | Masonry walls and concrete floors | | up to 2 hrs | ≥ 1 hr | Plasterboard walls | Cables supported on trays or ladders | up to 4 hrs | ≥ 1 hr | Masonry walls and concrete floors | | up to 2 hrs | ≥ 1 hr | Plasterboard walls |
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