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FIRE SERVICE AND GENERAL FIRE SAFETY TOPICS => Fire Safety => Topic started by: TickityBoo on February 21, 2008, 08:44:15 PM

Title: Staircase enclosures and separating/compartment floors
Post by: TickityBoo on February 21, 2008, 08:44:15 PM

Grateful if someone could clarify whether a staircase enclosure passing through a long duration (2hr fire resistance) separating floor requires to be long duration itself, IN THE STOREYS ABOVE AND BELOW THE SEPARATING FLOOR, in order to maintain the integrity of the floor - or is medium duration acceptable above the level of the separating floor?

Title: Staircase enclosures and separating/compartment floors
Post by: kurnal on February 21, 2008, 08:51:47 PM

If its a compartment floor then the staircase needs to be a protected shaft to the same standard as the floor ie if the floor is to a 90 minute standard the walls of the staircase shaft need to be 90 minutes but the doors leading into the stairs can be half the fire resistance of the wall -ie in this example would be one hour doors (they dont do 45 minute doors).

Title: Staircase enclosures and separating/compartment floors
Post by: wee brian on February 21, 2008, 11:02:46 PM

Unless they do something funny in Scotland

Title: Staircase enclosures and separating/compartment floors
Post by: kurnal on February 21, 2008, 11:19:01 PM

Now come on Wee b- You will be suggesting next that the men  dont wear trousers!

Title: Staircase enclosures and separating/compartment floors
Post by: TickityBoo on February 22, 2008, 08:46:59 AM

Thanks - that's what I thought.  I was thinking of a long duration (2hr) compartment separated from a medium duration (1hr) compartment above.  The separating/compartment floor between the two compartments would have to be long duration.  I was sure that the staircase enclosure should be long duration to maintain integrity, both above and below the separating/compartment floor. Thanks for confirming this.