- Author
-
Brown, N.
- Title
- Steelwork Partially Protected From Post-Flashover Fires In Gypsum Plasterboard Lined Compartments.
- Coporate
- University of Canterbury, Christchurch, New Zealand
- Report
-
Fire Engineering Research Report 07/3
2007
144 p.
- Keywords
-
compartments
|
flashover
|
steels
|
gypsum
|
plasterboard
|
thermal analysis
|
radiant heat transfer
|
beams
|
steel beams
|
formulations
|
ceilings
|
fire protection
|
tests
|
temperature
|
design fires
|
fire ratings
|
fire severity
|
design applications
|
experiments
- Identifiers
- time-temperature curves; full scale compartment experiments; multi-lumped-mass, step-by-step beam analysis; partially protected steelwork; steelwork protected with a radiation shield; gypsum plasterboard model; steelwork above a gypsum plasterboard ceiling
- Abstract
- This report extends the step-by-step method of thermal analysis of unprotected steel, to a multi mass system and includes radiant heat transfer between elements. The analysis was applied to i) partial protection of a beam and to ii) a light-gauge radiation shield around a steel beam. Both the partial protection of the bottom flange, and the light-gauge steel radiation shield improved performance but did not give useful protection against a realistic fire in a gypsum plasterboard lined fire compartment. The report also formulates a method of thermal analysis for gypsum plasterboard ceilings. This analysis was applied to a gypsum plasterboard ceiling giving protection to a steel beam within the ceiling space. Gypsum plasterboard ceilings were found to give useful protection to steelwork in the ceiling space. The analysis method can be implemented using a spread-sheet analysis, or by using a simplified approach based on the 'equal area concept'. Three compartment experimental tests, along with previous furnace data, validates the analysis. The report also compares the time-temperature curves of the three compartment experimental tests with the Eurocode (and modified Eurocode) Parametric design fires.