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Masonry slender wall lap splices

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A recent issue of CMR Report (Vol. 10, No. 2) indicates that the code 
required splice lengths are *less* than what is necessary for larger bars.  
"Based on results of ... research, both the existing working stress design 
equation and the strength design equation were identified as being 
under-conservative for large reinforcing bar sizes and are sometimes overly 
conservative for smaller bar sizes."  

You can download a copy of the report (.PDF format) from the Council for 
Masonry Research web site at www.masonryresearch.org.

Hope this helps.

A. Roger Turk, P.E.(Structural)
Tucson, Arizona