The client required a solution to upgrade each floor level ‘break’ behind the existing external cladding. With many difficult site considerations to overcome including the possible removal of existing high rise cladding and the significant cost implications of doing so, we set about reviewing the alternatives. After several weeks of on site testing and ad hoc tests carried out at our in house facility on the proposed solutions, the final proposal was approved by the client and independently fire tested. The system achieved the 30 minute protection level required for this detail.
Below are a selection of images and videos from the testing process carried out at the BRE test centre on 18th January 2018.
What you see is an ‘external’ vertical cladding façade built on two sides to represent three floors of a corner building detail constructed in front of and against an access stairwell.
Not visible but installed within the construction at each floor level (marked by the dark horizontal dotted lines (to identify each floor level)) is the proposed new cavity fire break system.
It ran for a total of 60 minutes (30 minute fire test requirement, test was continued for a further 30 mins before cold water hose stream applied (to put the fire out)!
The test was carried out to establish if the ‘new’ fire break detail installed at each floor level maintained its integrity for the required period or not; assessing heat rise and flame spread / smoke emissions during the test.
We hope to use test result data (pending issue of certified test data) to allow our client’s cladding to be reinstated with this our newly tested cavity fire break detail installed behind the cladding walls at each floor level (as shown in this test rig construction and briefly described here).
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