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AMD2 - Clause 422.2 - Cables in protected escape routes.

pww235

Evening all,

So, this is causing me some head scratching. Why oh why did this make it through the DPC?

As soon as an escape route is required to be of fire rated construction, we can't use it for main containment routes. Or am I missing something?

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  • A protected escape route is already protected from attack by fire from within the building so using such routes as wire ways normally only requires 30min FR from within the protected escape route itself. So, for example, the normal practice of placing cables above suspended ceilings along corridors that are protected escape routes will need to ensure that the ceiling offers the appropriate FR. 
    Your Approved Document B or our Part E guidance for the Building Regulations offers appropriate definitions for protected corridor, shaft and stair, all of which constitute the standard means of providing a protected escape route in the event of fire in a building.

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  • A protected escape route is already protected from attack by fire from within the building so using such routes as wire ways normally only requires 30min FR from within the protected escape route itself. So, for example, the normal practice of placing cables above suspended ceilings along corridors that are protected escape routes will need to ensure that the ceiling offers the appropriate FR. 
    Your Approved Document B or our Part E guidance for the Building Regulations offers appropriate definitions for protected corridor, shaft and stair, all of which constitute the standard means of providing a protected escape route in the event of fire in a building.

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