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Fire Performance of Self-Tapping Screws in Tall Mass-Timber Buildings
- Source :
- Applied Sciences, Vol 11, Iss 3579, p 3579 (2021), Applied Sciences; Volume 11; Issue 8; Pages: 3579
- Publication Year :
- 2021
- Publisher :
- MDPI AG, 2021.
-
Abstract
- Building elements are required to provide sufficient fire resistance based on requirements set forth in the National Building Code of Canada (NBCC). Annex B of the Canadian standard for wood engineering design (CSA O86-19) provides a design methodology to calculate the structural fire-resistance of large cross-section timber elements. However, it lacks at providing design provisions for connections. The objectives of this study are to understand the fire performance of modern mass timber fasteners such as self-tapping screws, namely to evaluate their thermo-mechanical behavior and to predict their structural fire-resistance for standard fire exposure up to two hours, as would be required for tall buildings in Canada. The results present the great fire performance of using self-tapping screws under a long time exposure on connections in mass timber construction. The smaller heated area of the exposed surface has limited thermal conduction along the fastener’s shanks and maintained their temperature profiles relatively low for two hours of exposure. Based on the heat-affected area, the study presents new design principles to determine the residual length of penetration that would provide adequate load-capacity of the fastener under fire conditions. It also allows determining safe fire-resistance values for unprotected fasteners in mass timber construction exposed up to two hours of standard fire exposure.
- Subjects :
- Technology
business.product_category
QH301-705.5
QC1-999
0211 other engineering and technologies
Design elements and principles
self-tapping screws
020101 civil engineering
02 engineering and technology
Residual
Fastener
0201 civil engineering
021105 building & construction
heat transfer
General Materials Science
Biology (General)
Instrumentation
QD1-999
connections
fire performance
mass timber
finite element modeling
Fluid Flow and Transfer Processes
business.industry
Process Chemistry and Technology
Physics
General Engineering
Structural engineering
Engineering (General). Civil engineering (General)
Fire performance
Computer Science Applications
Chemistry
National Building Code of Canada
Tapping
Environmental science
Fire resistance
TA1-2040
business
Engineering design process
Subjects
Details
- Language :
- English
- ISSN :
- 20763417
- Volume :
- 11
- Issue :
- 3579
- Database :
- OpenAIRE
- Journal :
- Applied Sciences
- Accession number :
- edsair.doi.dedup.....b035308f54b4d7172908802d1ddee44f