The floor joists in our 1992 house (new to us) was notched more than
50% in 2 places (to install the A/C ducts) & drilled in another area to
install several small copper pipes. I had 2 contractors come out &
look at the notched floor joists & give an estimate for repairs. One
said it was no problem because: (1) the house is 15+ years old & there
was no evidence of buckling in the floor; (2) the notches are close to
perpendicular support beams in the crawl space and near the concrete
block framework for the crawlspace. A second contractor said it needs
to be repaired & the house may not be up to code because of the
notching (although it is commonly done by contrators when installing
ductwork.

2 questions:

1. Is this a problem that needs to be repaired? (Even though there is
no evidence in the home that it is causing a problem & the places where
the joists were notched are not supporting any heavy pieces of
furniture.)

2. Can I do this repair myself?

- I have an idea of what needs to be done (i.e., scrape out a flat
spot, pour concrete foundation, get 2 concrete cinderblocks [or
concrete blocks designed specifically for this job], then install 2
jacks for each cut out. But what type of jacks? and how tight should
the jacks be against the floor joists to give it enough support?

wrote:
The floor joists in our 1992 house (new to us) was notched more than
50% in 2 places (to install the A/C ducts) & drilled in another area to
install several small copper pipes. I had 2 contractors come out &
look at the notched floor joists & give an estimate for repairs. One
said it was no problem because: (1) the house is 15+ years old & there
was no evidence of buckling in the floor; (2) the notches are close to
perpendicular support beams in the crawl space and near the concrete
block framework for the crawlspace. A second contractor said it needs
to be repaired & the house may not be up to code because of the
notching (although it is commonly done by contrators when installing
ductwork.

2 questions:

1. Is this a problem that needs to be repaired? (Even though there is
no evidence in the home that it is causing a problem & the places where
the joists were notched are not supporting any heavy pieces of
furniture.)

2. Can I do this repair myself?

- I have an idea of what needs to be done (i.e., scrape out a flat
spot, pour concrete foundation, get 2 concrete cinderblocks [or
concrete blocks designed specifically for this job], then install 2
jacks for each cut out. But what type of jacks? and how tight should
the jacks be against the floor joists to give it enough support?

Functionally, the house seems to be o.k.
It may not meet code.
If you want to "fix" the condition, I wouldn't use jacks as permanent
support.
Lay down some temporary supports to spread the weight and use jacks to
lift the joist slightly above level.
Install concrete footings and masonry piers to support joists at level.
remove jacks.
TB

wrote:
The floor joists in our 1992 house (new to us) was notched more than
50% in 2 places (to install the A/C ducts) & drilled in another area to
install several small copper pipes. I had 2 contractors come out &
look at the notched floor joists & give an estimate for repairs. One
said it was no problem because: (1) the house is 15+ years old & there
was no evidence of buckling in the floor; (2) the notches are close to
perpendicular support beams in the crawl space and near the concrete
block framework for the crawlspace. A second contractor said it needs
to be repaired & the house may not be up to code because of the
notching (although it is commonly done by contrators when installing
ductwork.

2 questions:

1. Is this a problem that needs to be repaired? (Even though there is
no evidence in the home that it is causing a problem & the places where
the joists were notched are not supporting any heavy pieces of
furniture.)

2. Can I do this repair myself?

- I have an idea of what needs to be done (i.e., scrape out a flat
spot, pour concrete foundation, get 2 concrete cinderblocks [or
concrete blocks designed specifically for this job], then install 2
jacks for each cut out. But what type of jacks? and how tight should
the jacks be against the floor joists to give it enough support?

Functionally, the house seems to be o.k.
It may not meet code.
If you want to "fix" the condition, I wouldn't use jacks as permanent
support.
Lay down some temporary supports to spread the weight and use jacks to
lift the joist slightly above level.
Install concrete footings and masonry piers to support joists at level.
remove jacks.
TB

wrote in message
ups.com...
The floor joists in our 1992 house (new to us) was notched more than
50% in 2 places (to install the A/C ducts) & drilled in another area to
install several small copper pipes. I had 2 contractors come out &
look at the notched floor joists & give an estimate for repairs. One
said it was no problem because: (1) the house is 15+ years old & there
was no evidence of buckling in the floor; (2) the notches are close to
perpendicular support beams in the crawl space and near the concrete
block framework for the crawlspace. A second contractor said it needs
to be repaired & the house may not be up to code because of the
notching (although it is commonly done by contrators when installing
ductwork.

2 questions:

1. Is this a problem that needs to be repaired? (Even though there is
no evidence in the home that it is causing a problem & the places where
the joists were notched are not supporting any heavy pieces of
furniture.)

2. Can I do this repair myself?

- I have an idea of what needs to be done (i.e., scrape out a flat
spot, pour concrete foundation, get 2 concrete cinderblocks [or
concrete blocks designed specifically for this job], then install 2
jacks for each cut out. But what type of jacks? and how tight should
the jacks be against the floor joists to give it enough support?


1. If it aint broke, don't fix it.

If you planned to install a heavy hot tub or billiard table right over the
spot, I might have some concern.

Any jacks or supports you install do not need to push up hard against the
house, they are there to prevent flexing of the joist if a load is placed
over it.

I lean toward this needing fixed, things have a way of going south over
time. Whoever cut them was an idiot. I would have the A/C ducts moved
to a location where they don't require cuts, and marry new joists to
the compromised ones.

I am not a carpenter or engineer, so ymmv.

wrote in message
ups.com...
The floor joists in our 1992 house (new to us) was notched more than
50% in 2 places (to install the A/C ducts) & drilled in another area to
install several small copper pipes. I had 2 contractors come out &
look at the notched floor joists & give an estimate for repairs. One
said it was no problem because: (1) the house is 15+ years old & there
was no evidence of buckling in the floor; (2) the notches are close to
perpendicular support beams in the crawl space and near the concrete
block framework for the crawlspace. A second contractor said it needs
to be repaired & the house may not be up to code because of the
notching (although it is commonly done by contrators when installing
ductwork.

2 questions:

1. Is this a problem that needs to be repaired? (Even though there is
no evidence in the home that it is causing a problem & the places where
the joists were notched are not supporting any heavy pieces of
furniture.)

2. Can I do this repair myself?

- I have an idea of what needs to be done (i.e., scrape out a flat
spot, pour concrete foundation, get 2 concrete cinderblocks [or
concrete blocks designed specifically for this job], then install 2
jacks for each cut out. But what type of jacks? and how tight should
the jacks be against the floor joists to give it enough support?


Dude, seriously not enough information to help you.

My answers would only be dripping in sarcasm

Engineers get paid for this kind of inspection and solution. DIY, no
because of the way you state the problem and your solution.

wrote in message
ups.com...
The floor joists in our 1992 house (new to us) was notched more than
50% in 2 places (to install the A/C ducts) & drilled in another area to
install several small copper pipes.

1. Is this a problem that needs to be repaired? (Even though there is
no evidence in the home that it is causing a problem & the places where
the joists were notched are not supporting any heavy pieces of
furniture.)

Some support can't hurt. It may never be a problem, but with simple
support, it can prevent it from being one in another 20 or 50 or 100 years.
There are limits on what you can cut out and be code compliant, as well as
where it can be cut. I'm not sure of what the code is though so find out
for sure.


2. Can I do this repair myself?

- I have an idea of what needs to be done (i.e., scrape out a flat
spot, pour concrete foundation, get 2 concrete cinderblocks [or
concrete blocks designed specifically for this job], then install 2
jacks for each cut out. But what type of jacks? and how tight should
the jacks be against the floor joists to give it enough support?

That can work. The jacks must be a mechanical type, like a screw jack.
Bottle jacks can leak over time and then you have no support. Since you
have no sag yet, they should be snug, not lifting anything at all. The base
must be solid so it does not sink, thus not giving any support.

Only a professional with proper credentials can say what "must" be done but
some support is better than no support. As long as you don't lift and stress
anything you can do no damage.