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Sprinkler Protection of Wooden Stairwells

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Standard fire (wood crib) Doors and windows to the staircase closed ... Standard fire (wood crib) door and window open. Video ... – PowerPoint PPT presentation

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Title: Sprinkler Protection of Wooden Stairwells


1
Sprinkler Protection of Wooden Stairwells
Henrik Bygbjerg, M.Sc., hby_at_dbi-net.dk Head of
Research and Development at DBI 7th International
Fire Sprinkler Conference 24-25 June 2008 in
Copenhagen
2
Sprinkler Protection of Wooden Stairwells
  • When renovation of old buildings 3 methods exists
  • Replacement of wooden stairwell with stairwell
    class R 30 A2-s1,d0 BS-building element 30
  • i.e. steel or concrete stairwell
  • Protection of wooden stairwell with covering
    class K2 30 A2-s1,d0 30 minutes Fire protection
    system
  • i.e. 15 mm fire gypsum board
  • Sprinkler protection of stair case

3
Danish sprinkler regulation - historic
  • Sprinkler protection of wooden stairwell was
    allowed in buildings with up to 4 stories
  • Water amount calculated for release of all the
    sprinklers in the staircase
  • Alarm to the fire brigade by usage of Pressostat
  • Valves at building supply is to be installed

4
Test programe
  • Laboratory test conducted in DBI laboratory
  • Staircase with 2.5 stories
  • Full scale test conducted in an existing building
    with 5 stories located in Copenhagen
  • Both test series was carried out for 4 different
    tests consisting of 2 fires in 2 boundary
    conditions
  • Arson fire (fire in a child carrier)
  • Standard fire (wood crib)
  • Doors and windows to the staircase closed
  • Front door and top window to the staircase open

5
Existing building for test in Copenhagen
  • 5 stories height
  • 6 sprinklers
  • 15 thermo couples
  • 2 pressure gates

6
Standard fire (wood crib) door and window open
  • Video

7
Arson fire (child carrier) door and window open
  • See the Video at
  • http//dbi-net.dk/Default.asp?Id2768

8
Results
  • The sprinkler system controlled all of the 4
    fires
  • The sprinkler system extinguished 3 of the fires
  • Not all sprinklers in the staircase released
  • DBI retningslinie 251 chapter 1100 revised

9
Results - temperatures
10
Results - temperatures
11
Future
  • Sprinkling of wooden staircase allowed in
    building with top floor level lt 22.0 m over
    ground level
  • Release of 4 sprinkler should be used for water
    supply
  • Flow switch for transmitting alarm to the fire
    brigade
  • Valves at building supply shall not be installed

12
Further information
  • Report (in danish) and video on DBIs web page
  • www.en.dbi-net.dk
  • The test were conducted in coordination with
  • www.social.dk
  • www.nova5.dk
  • www.dominia.dk
  • www.kuben.dk
  • www.bns.dk
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