- Author
-
Abrams, M. S.
|
Gustaferro, A. H.
- Title
- Fire Tests of Poke-Thru Assemblies.
- Coporate
- Portland Cement Assoc., Skokie, IL
- Report
-
Research and Development Bulletin
1971
22 p.
- Keywords
-
concrete slabs
|
fire resistance tests
|
floors
- Identifiers
- electrical fittings; poke-thru fittings
- Abstract
- Unprotected poke-thru fittings can reduce the fire endurance of a floor significantly by providing openings or direct heat paths through the floor. This paper describes a series of fire testsof concrete slabs in which poke-thru fittings were mounted. Various types of protection were provided for the fittings, including sprayed insulation and heat shields. In some tests, modified fittings with built-in fire resistance were used. A total of 120 poke-thru assemblies were firetested - 100 3.3-ft slabs and 20 in full scale floor slabs. Fire endurance ranged from a few minutes to more than 4 hours, depending on the type and amount of protection. Data are presented in a manner to assist designers and fitting manufacturers in selecting protection methods to provide the required fire endurance.