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Grout Spacing 1

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LLG

Structural
Sep 13, 2003
8
US
Referring to UBC 1997 Table 21 - H - 1, what is meant by grout spacing? I have an example where there is an 8 in CMU wall reinforced with #5 at 48" on center vertical. 48" is listed as the "grout spacing" so does grout spacing really mean the spacing of the vertical bars or is the use of 48" just a coincidence here?
 
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It's not a coincidence. The grout is placed in the same cells as the vertical bars to bond the bars to the wall, assure the bars stay centered, add shear area and probably a couple of other things I'm forgetting. You can also grout the other cells if desired, if you want to add more mass or shear area.
 
Could the 48" be the grouting lift height (i.e. low lift grout)?
 
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