In article ,
N. Thornton wrote:
Clamp 2x4 wood onto side of each existing joist. Get it properly
level.
Run pencil along top of old joist, to mark side of new 2x4.
Cut new wood along this line, so it fits to the old joist.
Glue and screw the new wood on the top of the old joist.
Relay floorboards, or use your new boards and sell the old if you
prefer.

Why bother with all that work? Simply screw them to the existing joists -
as I suggested days ago.

--
*Don't worry; it only seems kinky the first time.*

Dave Plowman London SW
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