We live in a small cheap 3 bedroom ranch built in 1976. We are the 2nd
owners, it's our first house.
We've recently noticed, while doing some work in the basement, that
about 2/3rds of the floor joists in the basement are twisting on the
main beam. They are no longer perpendicular on the beam but are on an
angle. / , not | , when viewed on end. Some are worse than others.
There are a few slightly saggy spots in the floor upstairs and it's
starting to squeak.
A few more details:
1) The joists are 2 x 10s, 16" on center.
2) The span is 12 - 13 feet - because of a stepback in the front of the
house one end is 24' across, the other is 26'.
3) Metal X bracing is installed at mid-span for most joists, but is
missing where ductwork is and in a few other places.
4) The joists do not overlap each on the main beam, they are butted
against each other and a single plywood gusset of about 1/2" thick, 6"
wide, and 2 feet long --stapled-- to the joists across the joint.
5) No toenailing is apparent where the bottom of the joist meets the
6) No blocking was installed where the joists meet the main beam.
1) Is it possible to straighten the twisted joists? If so, how?
2) Should the joists be sistered with more 2 x 10 across the main beam
or put in more plywood gusset before putting in blocking?
3) Can you block or sister with that small plywood gusset in place or
should it be removed to get full access to the sides of the joists?
4) Will jacking anything up be required? What gets jacked? It seems
like a bad idea to jack the joists that are at an angle as you may roll
them over more.
The more information you can give me, the better, as we decide what to
do (and who will do it - we do a lot ourselves but this may be
We would like to punch both the builder and our building inspector
right about now. Both were idiots - the builder butchered a lot of
stuff and the inspector never caught it, and we were too green to know
what we were looking at.
Thanks very much,