- Author
- Hayes, W. D., Jr. | Custer, R. L. P.
- Title
- Investigation of the Suitability of Light Duty Pipe Hangers for Use in Residential and Care Type Sprinkler Systems. Final Report.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
- Sponsor
- Department of Housing and Urban Development, Washington, DC
- Report
- NBSIR 77-1282, October 1977, 44 p.
- Distribution
- Available from National Technical Information Service
- Keywords
- sprinkler systems | fire endurance
- Abstract
- Several sizes of various types of commonly available light duty hangers for pipe, cable and conduit were subjected to load failure tests and while under load to exposure to 70 to 140 pound (31.8 and 63.5 kg, respectively) crib fires. In addition, hangers made from thin strap metal were tested for effect on performance of undersized screws and for benefit obtained from the use of washers. All sizes of the two-hole or two-fastener hangers met the NFPA No. 13 Standard for the Installation of Sprinklers load requirement, while only the nominal 1-1/4 inch size of the one-hole hangers met the requirement. Washers improve the performance of hangers made of thin strap metal.