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Old 05-02-2010, 10:30 AM   #1
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I'm building an addition to my house, a fairly large master bedroom suite about 670 sq feet.

My contractor bailed on me and I've been assessing his work, much of it shoddy.

When I crawled underneath the floor to check things out the most glaring thing I saw was the connections for the floor joists to the existing house. I'm no professional here, but the ledger board looks way undersized and the hangers are obviously too small as well. Due to this mismatch, there is only room for 1 nail on each side of the hanger! I can't believe the inspector let this pass. This connection is 23' 9", and the ridge beam support of the vaulted ceiling rests directly on it.

My thoughts are to add a second ledger board beneath the first so I can at least get more nails in the hangers. I'd like to increase the size of the hangers as well.

Also will need to fabricate underneath to properly support the ceiling support.

Looking for any advice or input on making this right.
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Old 05-02-2010, 11:45 AM   #2
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Did the contractor work off plans? And did the inspector actually provide a written sign off for the work?

The hangars look like they are the right size, the problem as you indicated is that the rim joist is not deep enough, so you can't get enough nails in the hangars to make it right. The best solution would be to replace the rim joist, unfortunately this involves major teardown and rebuild. There is no simple way that I can think of to add dept to the rim joist, while still maintaining the required strength.

Perhaps there are some carpenters on this site who have had personal experience retrofitting improperly built floor joist systems. There may also be a different type of hangar that may allow you to get the right number of nails in, you may want to check the Simpson catalog.

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Old 05-02-2010, 11:45 AM   #3
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What about building a support wall directly under the 3 joists on the right ?
How many joists are like this ?
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Old 05-02-2010, 12:19 PM   #4
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"Did the contractor work off plans? And did the inspector actually provide a written sign off for the work?"

Yes to both.

"How many joists are like this ?"

15

"The best solution would be to replace the rim joist, unfortunately this involves major teardown and rebuild."

That's the rub. I was thinking if I added additional rim joist below the existing one, anchored it to the foundation, then used metal reinforcement between the two to join them it might be enough.

I'll look into different hangers as well.
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Old 05-02-2010, 02:34 PM   #5
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See if your Building Inspector will accept a pressure treated rim/ledger below the existing, through-bolted to the concrete wall, as you said- these are rated at 50# per square foot load- tables: http://www.awc.org/Publications/DCA/DCA6/DCA6-09.pdf

I would follow the plans for the post/ridge beam support to the earth.

Be safe, Gary
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Old 05-02-2010, 04:32 PM   #6
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What I don't understand is, if he was working off plans, why wasn't this issue detailed on those plans? You transition from 2x8's to 2x12's and that's the solution the architect came up with?
If the inspector signed off on these, he's either blind or an idiot. The holding power of the hangers depends on all the holes being used to nail it down. If the correct hangar is installed incorrectly, it doesn't make the installation appropriate.
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Old 05-02-2010, 04:41 PM   #7
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Probably could get a 2x12 top flange hanger in there.
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Old 05-02-2010, 05:16 PM   #8
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Hi

Pic 1 - You may be able to get away with an 'L' section steel directly bolted to the wall or you may need an improvised/extended steel section 'gallows bracket'. Whichever mode you should get a Structural Engineer to verify the design. Next job as a precaution will be to provide temporary support (underpin) the existing floor joists - case of a few sections of timber and some acrow props - the SE will be able to advise.

Once the floor is safe you can go about introducing/bolting the new support bracket to the existing wall, you may wish to use a few acrow props to ensure a tight fit between the support bracket and the underside of the joists, then mark up the holes, remove the support bracket, drill the holes, fit the expansion pieces to the raw bolts, offer up the support bracket and make final connections, when done remove the temporary support and job done.

The ridge board should not be too much of an issue, again get the SE to advise - looks worse than it is and you could extend the ceiling across from the top of your partition wall to cover any unsightly solutions. As mentioned the SE will be able to sort this out for you!

I hope all goes well for you!

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Old 05-02-2010, 07:36 PM   #9
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Quote:
Originally Posted by Ron6519 View Post
What I don't understand is, if he was working off plans, why wasn't this issue detailed on those plans? You transition from 2x8's to 2x12's and that's the solution the architect came up with?
If the inspector signed off on these, he's either blind or an idiot. The holding power of the hangers depends on all the holes being used to nail it down. If the correct hangar is installed incorrectly, it doesn't make the installation appropriate.
Ron
I drew the plans and 2x12 was specified in the plans. Using the 2x8 was solely the decision of my contractor and was done while I was at work. I work long hours and travel frequently, so this and other construction wonders occurred while I was gone that I'm just now finding.

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