Danish Institute of Fire and Security Technology Sprinkler Research

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Danish Institute of Fire and Security Technology
Sprinkler Research Glass ConstructionAnders
Drustrup

• 7th International Fire Sprinkler Conference
  Exhibition
• 2008 Copenhagen, Denmark

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Purpose with test
Replace a standard passive fire protective
system with a combined active and passive system.
Passive system Glazed partition (3200 mm x
2035mm) Aluminium frame with Intermediate
mullion Tempered glass Active system Window
sprinkler k-factor 80 LPM/bar½ (5.6
GPM/psi½) Quick response bulb 68 Required
Classification EI 60, Integrity 60
minutes Insulation 60 minutes According to EN
1364-1 (ISO 834, temperature curve)
DEKO Glazed partition
EN 1364-1 Fire resistance tests for
non-loadbearing elements Part 1 Walls
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Motivation
Reduced building costs for 60 minutes
partition Partition with fire resistant
glass 1300 1600 Partition with tempered
glass including sprinkling 450 - 530 Reduction
approx. 65 Reduced self-weight 25 mm fire
resistant glass 65 kg/m2 6 mm 8 mm tempered
glass 35 kg/m2 Reduction approx. 45
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Test Setup

Furnace specifications 22 Gas burners 215 kW per
burner Total capacity approx. 4700 kW
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Test results
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Test results after 62 minutes

• Measured temperature rise on unexposed side
• All temperatures on glass and frame below 140 C
• All temperature curves showed a tendency to level
  out
• Radiation from test specimen
• Radiation was approx. 1.1 kW/m2 at test stop
• Deflection of test specimen
• Measured deflection of between 2 mm

DEKO Glazed partition
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Test Summary

• Integrity and Insulation criteria fulfilled
• Insignificant radiation from test specimen
• Insignificant deflection of test specimen,
  indicating low temperature gradient in test
  specimen
• Dry spots around centre post observed
• Fracture of glass after test stop
• (during the cooling phase).

DEKO Glazed partition
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Critical parametersinfluencing the stress in the
glazing

• Passive system
• Type of glass,
• Edge handling
• Size of glass
• Blocking up of the glass
• Fixation of glass in frame
• Active system
• Response time
• Spray pattern
• Water flow
• The formation of dry spots during the test
• Position of mullions

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Needs for the future

• Standardised methods for combined systems
• A standard to evaluate the critical parameters of
  the active and passive system
• with rules for field of application of test
  results, to be used in the
• following FSE calculations.
• Possible technical committees in CEN to the
  undertake the work
• CEN/TC 127 Fire safety in building
• CEN/TC 191 Fixed fire fighting systems
• Suggestions
• Prescribed fire exposure scenarios for the period
  up to activation of the active system (passive
  system only).
• Verification of the passive systems ability to
  withstand the fire exposure until the active
  system responds.
• Verification of the passive systems ability to
  withstand the thermal shock originating from the
  water cooling the passive system immediately
  after the active system respond.
• Verification of that the combined systems ability
  to withstand the long term fire exposure after
  the active system respond.