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Grout Spacing

Grout Spacing

Grout Spacing

(OP)
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?

RE: Grout Spacing

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.

RE: Grout Spacing

Could the 48" be the grouting lift height (i.e. low lift grout)?

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