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serapions
floor joist and parallel partition wall

Dear Sirs,

I have looked carefully and now I see the joist running parallel to
the cement block wall. I have found a diagram in the "Basic
Carpentry" book:

IMAGINE A RECTANGLE WITH A VERTICAL LINE DOWN THE
MIDDLE. THESE ARE THE LOAD BEARING WALLS, EXTERIOR
PLUS ONE INTERIOR. A HORIZONTAL LINE IN THE MIDDLE
OF THE RECTANGLE JOINS THE CENTER VERTICAL LINE.
THIS HORIZONTAL LINE IS THE PARTITION WALL.
vertical load bearing
.....vertical bearing
...............V
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benson99
Re: floor joist and parallel partition wall

I really don't follow your whole description, but in general, yes, I'd (hurry) "sister" a new floor joist next to the one with a rotted end. That may be tough is the floor is sagging a bit, so you'll want to determine that first. If it is sagging, you have anothe rset of issues to contend with: 1) do you leave it and try to support the one rotted joist in a nother place, or 2) do you jack up the whole floor to insert a new straight joist and risk messing up something else upstairs when I jack it up. Good luck.

ed21
Re: floor joist and parallel partition wall

I don't quite follow either, but how did the water get in to rot the joist & have you corrected the situation.
Leaving rotted structure in place isn't usually a good idea. Also be sure you don't have termites.
If you do leave the joist at least cut it back to good wood.
The plate should be replaced if rotted. If the replaced piece is relatively small don't worry about anchoring to the block, nailing or some strapping will be okay.
The existing sill is probably anchored to the block every 4' to 6'or so. The anchors may be straps or bolts imbeded in the block.
Their is no standard joist length, but the span it can handle is determined by its size, spacing and loading.

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