Floor Joist Notched for Ledger 3

[SteelPE]

I have a project where I have to calculate the capacity of an existing wood framed floor (should be simple enough). I made a visit to the site yesterday and took a few photos and took some measurements. I noticed that all of the floor joists were notched in order to rest on a flush framed wood beam (see photo).

The notches on these joists is over the allowable notch located in the building code (which I believe to be 10% of the overall depth of the wood member). NDS does give an allowable shear equation for notches of fv = [3V/2bdn][d/dn]. Using this equation I am calculating an allowable end reaction of 154# which gives me next to nothing in capacity for the floor (17.5 psf).

I know this method of construction was used in the 1970's (my parents house has this exact detail). Question is, do I ignore the detail based upon it's the historical use of the detail or do I report the capacity of the floor as 17.5 psf? I am leaning towards the 17.5 psf as it's really not my problem to deal with at this time.

 

[phamENG]

I thought of asking for access...but when I realized how much time I spend on the technical forums, I decided it would be better for my productivity to refrain. I actual installed a time management 'helper' and blocked eng-tips for about a week and a half on my PC. I got a lot more done...

 

[KootK]

I'd be happy to lobby for a pub invite for anyone who wants one. That said, I myself am anti-pub. I'd have it abolished were it in my power. It's clear to me that it siphons off the energies and contributions of some of our best people. Ever wonder why some of our favorite mentors are largely absent these days? Some are dead but most are prattling away discussing meaningless bullshit over at the pub. Much like a real pub.

I've been torpedoing pub invites for pham for years in order to keep him focused here.

Invite pham? phamENG?? Nah... he's an incorrigible racist! Did you know that he's faking being Vietnamese?

 

[phamENG]

Outstanding. I appreciate the...um...support?

 

[KootK]

Outstanding. I appreciate the...um...support?

The real danger zone for losing you will be when you take on employees and share a physical space with them. It's tough to keep a gaggle of monkeys on task when their ring leader is goofing of on social media all of the time. You'll need to lead by sad example. When you scale, start with some nice, remote workers.

 

[WinelandV]

Invite pham? phamENG?? Nah... he's an incorrigible racist! Did you know that he's faking being Vietnamese?

All good humor has to "ride the line" however. Everything that is truly funny has to skirt the boundaries of what is not.

This checks out.

PhamENG, it almost sounds like Koot might want to be one of those remote workers.

With that, it's 5:00 pm here. While there's no pub available, there is some scotch calling my name...

And my apologies for contributing to the off topic posting in this thread.

Please note that is a "v" (as in Violin) not a "y".

 

[lexpatrie]

Point taken.

The IRC calls for four nails at the ledger doesn't it?

 

[bones206]

There are different fastener options in the table. I just went with the 3 spikes for my example.

 

[phamENG]

When you scale, start with some nice, remote workers.

That's the plan!

Unfortunately, if they're good enough to be remote, they're good enough for me to have to pay them a lot of money.

PhamENG, it almost sounds like Koot might want to be one of those remote workers.

See the unfortunate part of my plan above...

lexpatrie - is that out of your state's version of the residential code? I know North Carolina replaced the standard fastening table with a neat version that has pictures, but all the other states where I practice still have the plain text version. I like the pictures...contractors around here are really good at "interpreting" those tables in ways that invalidate my designs...and it usually happens with the inspector while I'm not there.

 

[lexpatrie]

That's from the 2021 "base" International Residential Code, as I recall. The figure is from the ISANTA ESR. There's probably similar in the ICC Commentary to the IRC, which is perhaps where the North Carolina code got their figures? I hope they match fairly well.....

 

[phamENG]

NC is still on the 2018 codes and will be for another 10 years (at least for the IRC). 2021 IRC still has the text tables, too. I hadn't seen the ISANTA ESR before - thank you for you pointing it out. Those are the graphics that NC used in their edited tables.