fire endurance testing of floor truss assemblies prepared ...fire endurance testing of floor truss...
TRANSCRIPT
![Page 1: Fire Endurance Testing of Floor Truss Assemblies Prepared ...Fire Endurance Testing of Floor Truss Assemblies Prepared by: Joe Treadway ... Testing Summary. WTC Floor Assembly. Test](https://reader035.vdocuments.site/reader035/viewer/2022071418/61163270d2db503e3f4d2ebe/html5/thumbnails/1.jpg)
Fire Endurance Testing of Floor Truss Assemblies
Prepared by:
Joe Treadway
Fred Hervey
![Page 2: Fire Endurance Testing of Floor Truss Assemblies Prepared ...Fire Endurance Testing of Floor Truss Assemblies Prepared by: Joe Treadway ... Testing Summary. WTC Floor Assembly. Test](https://reader035.vdocuments.site/reader035/viewer/2022071418/61163270d2db503e3f4d2ebe/html5/thumbnails/2.jpg)
ASTM E119 – Standard Test Methods for Fire Tests of Building Construction and Materials
ASTM E119 prescribes a standard fire exposure of controlled extent and severity.
Performance is defined as the period of resistance to standard exposure before the first critical point in behavior (conditionsof acceptance)is observed.
Conditions of acceptance for floor systems include:• Sustained applied load during classification period• No passage of flame or hot gasses• Maximum and average temperatures of the unexposed side of
the specimen• Maximum and average temperatures of the steel joists
![Page 3: Fire Endurance Testing of Floor Truss Assemblies Prepared ...Fire Endurance Testing of Floor Truss Assemblies Prepared by: Joe Treadway ... Testing Summary. WTC Floor Assembly. Test](https://reader035.vdocuments.site/reader035/viewer/2022071418/61163270d2db503e3f4d2ebe/html5/thumbnails/3.jpg)
•Two tests conducted in Toronto at ULCAugust 7, 2004 - 35 ft. Restrained Assembly
August 11, 2004 - 35 ft. Unrestrained Assembly
•Two tests conducted in Northbrook at ULIAugust 19, 2004 - 18 ft. Restrained Assembly
August 25, 2004 - 18 ft. Restrained Assembly (1/2 in. fireproofing)
Testing Summary
![Page 4: Fire Endurance Testing of Floor Truss Assemblies Prepared ...Fire Endurance Testing of Floor Truss Assemblies Prepared by: Joe Treadway ... Testing Summary. WTC Floor Assembly. Test](https://reader035.vdocuments.site/reader035/viewer/2022071418/61163270d2db503e3f4d2ebe/html5/thumbnails/4.jpg)
WTC Floor Assembly
![Page 5: Fire Endurance Testing of Floor Truss Assemblies Prepared ...Fire Endurance Testing of Floor Truss Assemblies Prepared by: Joe Treadway ... Testing Summary. WTC Floor Assembly. Test](https://reader035.vdocuments.site/reader035/viewer/2022071418/61163270d2db503e3f4d2ebe/html5/thumbnails/5.jpg)
Test Restraint Conditions
Restrained Test Condition Unrestrained Test Condition
Reaction FrameFloor Slab
Gap
Reaction FrameFloor Slab
![Page 6: Fire Endurance Testing of Floor Truss Assemblies Prepared ...Fire Endurance Testing of Floor Truss Assemblies Prepared by: Joe Treadway ... Testing Summary. WTC Floor Assembly. Test](https://reader035.vdocuments.site/reader035/viewer/2022071418/61163270d2db503e3f4d2ebe/html5/thumbnails/6.jpg)
Effect of Restraint Against Thermal Expansion
Heated floor assembly wants to expandIf thermal expansion is restrained, forces will developFloor assembly is subjected to fire conditions
Floor Asse
mbly
Span
Furnace
![Page 7: Fire Endurance Testing of Floor Truss Assemblies Prepared ...Fire Endurance Testing of Floor Truss Assemblies Prepared by: Joe Treadway ... Testing Summary. WTC Floor Assembly. Test](https://reader035.vdocuments.site/reader035/viewer/2022071418/61163270d2db503e3f4d2ebe/html5/thumbnails/7.jpg)
Design and Fabrication of Test Assemblies
![Page 8: Fire Endurance Testing of Floor Truss Assemblies Prepared ...Fire Endurance Testing of Floor Truss Assemblies Prepared by: Joe Treadway ... Testing Summary. WTC Floor Assembly. Test](https://reader035.vdocuments.site/reader035/viewer/2022071418/61163270d2db503e3f4d2ebe/html5/thumbnails/8.jpg)
Preparation of Test Assemblies
![Page 9: Fire Endurance Testing of Floor Truss Assemblies Prepared ...Fire Endurance Testing of Floor Truss Assemblies Prepared by: Joe Treadway ... Testing Summary. WTC Floor Assembly. Test](https://reader035.vdocuments.site/reader035/viewer/2022071418/61163270d2db503e3f4d2ebe/html5/thumbnails/9.jpg)
Instrumentation
Each Assembly Contained:
• 159 Thermocouples–44 on Each Main Truss
–~ 6 miles of thermocouple wire
• 2 Plate TC’s, 2 Radiometers, 2 Asp. TC’s
• 15 Deflection Measurements–9 on Unexposed Surface
–6 on Bottom Chords
![Page 10: Fire Endurance Testing of Floor Truss Assemblies Prepared ...Fire Endurance Testing of Floor Truss Assemblies Prepared by: Joe Treadway ... Testing Summary. WTC Floor Assembly. Test](https://reader035.vdocuments.site/reader035/viewer/2022071418/61163270d2db503e3f4d2ebe/html5/thumbnails/10.jpg)
UL - Northbrook Furnace
![Page 11: Fire Endurance Testing of Floor Truss Assemblies Prepared ...Fire Endurance Testing of Floor Truss Assemblies Prepared by: Joe Treadway ... Testing Summary. WTC Floor Assembly. Test](https://reader035.vdocuments.site/reader035/viewer/2022071418/61163270d2db503e3f4d2ebe/html5/thumbnails/11.jpg)
UL - Northbrook Furnace with Test Specimen
![Page 12: Fire Endurance Testing of Floor Truss Assemblies Prepared ...Fire Endurance Testing of Floor Truss Assemblies Prepared by: Joe Treadway ... Testing Summary. WTC Floor Assembly. Test](https://reader035.vdocuments.site/reader035/viewer/2022071418/61163270d2db503e3f4d2ebe/html5/thumbnails/12.jpg)
Loading of Test Assembly - Northbrook
Hydraulic Actuators
Concrete Block
Water-filled Containers
![Page 13: Fire Endurance Testing of Floor Truss Assemblies Prepared ...Fire Endurance Testing of Floor Truss Assemblies Prepared by: Joe Treadway ... Testing Summary. WTC Floor Assembly. Test](https://reader035.vdocuments.site/reader035/viewer/2022071418/61163270d2db503e3f4d2ebe/html5/thumbnails/13.jpg)
![Page 14: Fire Endurance Testing of Floor Truss Assemblies Prepared ...Fire Endurance Testing of Floor Truss Assemblies Prepared by: Joe Treadway ... Testing Summary. WTC Floor Assembly. Test](https://reader035.vdocuments.site/reader035/viewer/2022071418/61163270d2db503e3f4d2ebe/html5/thumbnails/14.jpg)
![Page 15: Fire Endurance Testing of Floor Truss Assemblies Prepared ...Fire Endurance Testing of Floor Truss Assemblies Prepared by: Joe Treadway ... Testing Summary. WTC Floor Assembly. Test](https://reader035.vdocuments.site/reader035/viewer/2022071418/61163270d2db503e3f4d2ebe/html5/thumbnails/15.jpg)
Post Test Observations Test No. 3
![Page 16: Fire Endurance Testing of Floor Truss Assemblies Prepared ...Fire Endurance Testing of Floor Truss Assemblies Prepared by: Joe Treadway ... Testing Summary. WTC Floor Assembly. Test](https://reader035.vdocuments.site/reader035/viewer/2022071418/61163270d2db503e3f4d2ebe/html5/thumbnails/16.jpg)
Post-Test Observations – Steel Truss Behavior
![Page 17: Fire Endurance Testing of Floor Truss Assemblies Prepared ...Fire Endurance Testing of Floor Truss Assemblies Prepared by: Joe Treadway ... Testing Summary. WTC Floor Assembly. Test](https://reader035.vdocuments.site/reader035/viewer/2022071418/61163270d2db503e3f4d2ebe/html5/thumbnails/17.jpg)
Post Test Observations - Slab Deflections
Test 1 - before
Test 1 - after
![Page 18: Fire Endurance Testing of Floor Truss Assemblies Prepared ...Fire Endurance Testing of Floor Truss Assemblies Prepared by: Joe Treadway ... Testing Summary. WTC Floor Assembly. Test](https://reader035.vdocuments.site/reader035/viewer/2022071418/61163270d2db503e3f4d2ebe/html5/thumbnails/18.jpg)
Fire Resistance Ratings
Times to Reach End-Point Criteria (min) Standard Fire Test Rating
Temperature onUnexposed Surface Steel Temperatures ASTM
E 119-61 ASTM E 119-00
Average(Ambient+250ºF)
Maximum(Ambient+325ºF)
Average(1100ºF)
Maxi-mum
(1300ºF)
Rating(hr)
Restr-ained
Rating(hr)
Unrestr-ained
Rating(hr)
1 35 ft, restrained,¾ in fireproofing --- 111 66 62 (3) 116(1) 1½ 1½ 1
2 35 ft, unrestrained,¾ in fireproofing --- --- 76 62 (3) 146(2) 2 --- 2
3 17 ft, restrained,¾ in fireproofing 180 157 86 76 (3) 210(2) 2 2 1
417 ft, restrained,
½ in fireproofing --- 58 66 58 (3) 120(1) ¾ ¾ ¾
Failure to
Support Load
TestTermin-
ated(min)
Test Description
___________________________________________________(1) Imminent collapse(2) Vertical displacement exceeded capability to measure accurately(3) Did not occur