Chamfered joists mid50's


Old 10-05-15, 08:24 PM
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Chamfered joists mid50's

In a recent mud bed demolition, I came across roughly hand chamfered 2x8s as if with a hatchet. The joists were chamfered to 1/2" flat left on top. Spaces between joists were filled with 4" of concrete, level with
these chamfered joists then the mud bed. I am curious why the chamfer.
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Old 10-05-15, 08:28 PM
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House is mid-late 50's. Thanks
Old 10-06-15, 03:48 AM
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Might be hard to determine why unless it was needed to make the joists fit. Could be the joists were originally intended for something else but then used for that job. Pics might not tell us anything but they would be interesting to see -

btw - welcome to the forums Kirk!
Old 10-06-15, 05:49 PM
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thanks for the welcome
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Old 10-06-15, 07:05 PM
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Hi Kirk,
Just a wild guess, since I have never see concrete filled between the joists, but perhaps the chamfer allows the concrete to be supported by the joists instead of just dead weight on whatever is below.


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