Drysdale, Robert1; Banting, Bennett2 and Stubbs, David3
1 Chair, CSA S304 and Professor Emeritus, Department of Civil Engineering, McMaster University, Hamilton, ON, Canada, drysdale@mcmaster.ca
2 Masonry Research and Development Engineer, Canada Masonry Design Centre, 360 Superior Blvd., Mississauga, ON, Canada, Bbanting@canadamasonrycentre.com
3 Vice Chair, CSA S304 and Director, Canada Masonry Design Centre, 360 Superior Blvd., Mississauga, ON, Canada, dstubbs@canadamasonrycentre.com
ABSTRACT
The 2014 edition of the Canadian Standards Association (CSA) S304 “Design of masonry structures” contains significant changes from the preceding 2004 edition. All non-seismic related changes to the standard are presented within this paper whereas the seismic changes are presented in a companion paper. New additions to CSA S304-14 include embedded anchor bolt design and arch design provisions. Changes have been made to the minimum reinforcement requirements as well as to the maximum bar size now allowed in reinforced masonry. Significant changes have been made to design of masonry beams including an adaptation of modified compression field theory for shear strength calculations, allowances for shear stirrups in 2-course beams, clarification
on masonry deep beam design and a greater emphasis on intermediate reinforcement placement closer to the tension face of beams. Lap splice provisions were largely kept the same as in 2004 with clarification given on contact versus non-contact splices as well as the inclusion of offset bar lap splices. New prism testing requirements and correction factors were introduced and minor changes were made to the fʹm strength tables.
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