CABLE-TRAYS: Through concrete (slab or wall)
Cable-tray gaps are packed tight with either a, solid intumescent encapsulated mineral fibre board, or a graphite charged intumescent block the full depth of the wall/slab. All cables will have a fire rated sealant pumped right through filling all possible gaps. All edges can be finished for visual exposure (being a grey colour blending with concrete is a simple task but both materials can be painted when cured). This method can support up to a 3hr+ rating.