Home>Discussions>INTERIORS>Molding & Carpentry>why is there concrete grout infill above my main floor beam?
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Shane
why is there concrete grout infill above my main floor beam?

I can't figure out why there is a consistent grout infill between the top of my main beam and the subfloor above.  This runs the full length of the house as far as I can tell.  There are diagonal wood herringbone struts elsewhere so it's probably not for cross bracing the joists.  Also there is mostly open space under the beam so it can't be meant as any sort of fire stop, insulation or sound barrier.  I'm replacing the main 3/4" copper service and would like to just chip out the concrete but someone went through a lot of trouble installing this stuff and I'm just not sure what it's for?  Any ideas would be appreciated.  Thanks

built 1963 in metro west Boston MA

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Clarence
Re: why is there concrete grout infill above my main floor beam?

 In the years before 1963 infills like that were used when marbel was used as a finished floor. If the concrete was used for this porpuse it would be about 2 inches thick and level with the top of the joist.

 

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