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Explanation of How to Read and Interpret the Strengths Given in TMS 602-16 Table 2

6/28/2018

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How do Interpret Table 2 in TMS 602-16 in order to get the required net area compressive strength of an individual block for a specified f'm?

I have included an article below explaining the increased block strength. It includes a copy of Table 2 so that you can reference it as you read this.

The values of f'm are listed in the left most column and are labeled "Net area compressive strength of concrete masonry". Values are given in psi.

The right hand two columns give the required Net area strength of the individual unit to achieve the given f'm. The far right column is to be used if Type "N" mortar is used to lay up the wall and the middle column is used if Type M or S mortar is used in the wall.

Thus,  an individual block with a net area strength of 2000 psi gives you an f'm = 2000 psi.
An individual block with a net area strength of 3250 psi gives you an f'm = 2500 psi.
And an individual block with a net area strength of 3900 psi gives you an f'm = 2750 psi.
​
Links to additional information:

Update on Increased Design Strength of CMU 1-3-18 with Attachment 1.pdf

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    Authors:

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    Don Beers, PE, GC
    561-310-9902
    don@floridamasonry.com
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    Jerry Painter, FASTM
    352-378-7511
    painterjm@gmail.com 

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