[scott j]

Building an addition and it looks some of the 12 ft wide (16 foot long) joists have only 1 inch sitting on the Sill (or upstairs wall). There is a joist running perpendicular which appears the joists are nailed into. Is it ok with only 1 inch of a 16 foot span is sitting on the plate but nailed into another 6 foot x 12 inch high joist that is also sitting on the Sill plate.

Also, which is better for a 16 foot joist span, solid wood blocking between joists or cross bracing at center (8 feet)?

Thanks for any help.

 

[Gary in WA]

1-1/2" minimum per 2003 UBC, IRC. Hanger them for load deflection on joists that long.

Bridging-- page 749: http://books.google.com/books?id=DW...X&oi=book_result&ct=result&resnum=4#PPA747,M1

Be safe, G

 

[VaViaCo]

2 inches

Been framing for 15 years, have heard 2" bearing is the standard since year one. 3 1/2 inch plate, rim takes up 1 1/2, leaves 2 for the joists. The span isn't relevant.

Hang those.

Or if the sill is on block or concrete and there is room, add more sill under the joists. (pressure treated).

 

[Gary in WA]

As VaVia said, you should have 2" there, what happened?

In the UBC, '76, '83 and 2003, (ones I bought new), the minimum bearing on wood is 1-1/2", UBC 2320.8.2.

Be safe, G

 

[Ron6519]

When I do additions, I use a 2x6" sill plate, so you would have 4" bearing on the plate.
Why would you use a 2x4 as a sill plate. It seems skimpy to me to have the house bearing down on 2" of wood.
Ron

 

[Termite]

Bearing's been pretty well covered.

As for the question about bridging/blocking...
Cross-bridging or solid blocking at mid-span will work equally well. The nice thing with bridging is that you can still run plumbing and electrical through it.

 

[Maintenance 6]

When I do additions, I use a 2x6" sill plate, so you would have 4" bearing on the plate.
Why would you use a 2x4 as a sill plate. It seems skimpy to me to have the house bearing down on 2" of wood.
Ron

OP said it's a second floor joist. There are millions of homes with second floor joists bearing on 2" of top plate in the exterior walls. Sounds like some-one doubled the ring joist in a short area. That doesn't leave enough bearing. I'd use some joist hangers in that short span.

 

[Ron6519]

OP said it's a second floor joist. There are millions of homes with second floor joists bearing on 2" of top plate in the exterior walls. Sounds like some-one doubled the ring joist in a short area. That doesn't leave enough bearing. I'd use some joist hangers in that short span.

I guess I should pay closer attention to the details.
Ron

 

[scott j]

Hanger

Thanks all! City inspector said to just slide a hanger under it. Looks good.