GENERAL FIRE SAFETY REQUIREMENTS - GUIDELINES ANNEX


GA 6.04 SPRINKLERS IN CONCEALED CEILING AND RAISED FLOOR SPACES
GUIDELINES ANNEX - GA_6.04 – Revisions_2015
Item No. Provisions Notes
1.0 Definitions  
1.1 Ceiling and floor spaces shall mean all concealed spaces between floors (or concrete slab roofs and floor) measured between the soffit to the top of the lined ceiling or between the top of the floor to the underside of the raised floor  
2.0 <400mm height  
2.1 Concealed ceiling and floor spaces not exceeding 400mm in depth need not be protected by sprinkler  
3.0 >400mmheight - <800mm and NO Combustible Material  
3.1

Concealed ceiling and floor spaces exceeding 400mm but not exceeding 800mm in depth and do not contain combustible material need not be protected by sprinklers subject to submission of an Material Audit of the contents of the space undertaken and endorsed by the responsible engineer.

The responsible engineer shall also confirm and verify that measures are implemented to ensure that the space remains as originally intended and there will be no fire load accumulation.

The Material Audit shall be subject to review and approval by the QCD and shall include a coordinated services drawing(s) of the space in question with a section drawing, a table listing all materials with their flame spread index (not to exceed 25) determined through testing in accordance with NFPA 255 (test reports to be included), the individual materials' heat content.

The total heat content within the concealed space which shall not exceed 11,356 kJ/m2 (1,000 Btu/ft2).

 
4.0 >400mmheight - <800mm and has Combustible Material  
4.1 Concealed ceiling and floor spaces exceeding 400mm but not exceeding 800mm in depth and containing combustible material shall be protected by sprinklers installed on the extended basis. Sprinkler protection may be omitted where the space is subdivided by fire and draught stops at intervals not exceeding 15m in any direction.  
5.0 >800mm and NO Combustible Material  
5.1 Concealed ceiling and floor spaces exceeding 800mm in depth not containing combustible materials shall be protected by sprinkler installed on the extended basis.  
6.0 >800mm and has combustible material  
6.1 Concealed ceiling and floor spaces exceeding 800mm in depth containing combustible material shall be fully protected by sprinklers in accordance with the requirement for the particular hazard.