Results of Truss Fire Tests Rattle Design Assumptions 9/13/2004
FLOOR SPECIMEN. 17-ft-long assembly with 1/2-in. fireproofing, before the Aug. 25 test.
The tests, conducted during August on 35-ft-long and 17-ft-long specimens with either 1/2 -in. or 3/4 -in.-thick sprayed-on fireproofing, showed the assemblies were able to withstand standard fire conditions for between one and two hours. The tests were performed by Underwriters Laboratories Inc. under a $236,635 contract and sponsored by the National Institute of Standards & Technology as part of the $16-million WTC building and fire safety investigation.