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Old 12-14-2011, 04:13 PM   #16
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What do I do with 2x4 ceiling joists?


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Should I bother trying to fasten the new joist to the top plates,
H3 Hurricane Tie

http://www.strongtie.com/products/connectors/H.asp

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Old 12-14-2011, 04:49 PM   #17
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What do I do with 2x4 ceiling joists?


Cheap and easy. Thanks!
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Old 12-20-2011, 04:01 PM   #18
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What do I do with 2x4 ceiling joists?


I noticed that we have several ceiling joists that do not lap over a bearing wall. They must have been supported by a closet wall at one time. Since I was planning on sistering new 2x10 joists to the existing 2x4 joists, the 2x10 joists will not be connected to each other. Should I alter my plan in some way to tie the 2x10s directly together?
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Old 12-21-2011, 08:39 PM   #19
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What do I do with 2x4 ceiling joists?


If only ceiling joists, “exceeding 2x10”: R802.8 Lateral support. Roof framing members and ceiling joists having a depth-to-thickness ratio exceeding 5 to 1 based on nominal dimensions shall be provided with lateral support at points of bearing to prevent rotation. For roof rafters with ceiling joists attached per Table R602.3(1), the depth-thickness ratio for the total assembly shall be determined using the combined thickness of the rafter plus the attached ceiling joist.” ”

You sound as if there will be storage, different requirements. If this will be a storage floor, you need lateral support at the ends; http://publicecodes.citation.com/ico...002_par025.htm

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Old 12-22-2011, 08:23 AM   #20
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What do I do with 2x4 ceiling joists?


Thanks, Gary. I was planning on putting blocking between the joists, so I guess tying the sisters to each other isn't such a big deal. I managed to crack one of the 2x4s completely as I was nailing. I tried using a hammer at first, but this job definitely requires a palm nailer.
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Old 12-22-2011, 09:26 PM   #21
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What do I do with 2x4 ceiling joists?


I don't mean to have you guys hold my hand so much, but I'm still a novice.

I jacked up one of the old joists a little too high when I sistered it, and now both joists float about 1/8" over the bearing point. Should I shim the joists and let a drywall guy deal with the out of plane joist, or should I pile some weight on the joist and try to pull it back down?
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Old 12-22-2011, 09:50 PM   #22
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What do I do with 2x4 ceiling joists?


1/8" isn't too bad if on 24" centers....
He can also shim it if you point it out to him. You should shim under it before nailing if it won't go down with your weight.

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Old 12-22-2011, 10:35 PM   #23
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What do I do with 2x4 ceiling joists?


I have no suggestions for you as I do not know the full extent of what you are trying to do.
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Old 12-22-2011, 11:04 PM   #24
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What do I do with 2x4 ceiling joists?


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1/8" isn't too bad if on 24" centers....
He can also shim it if you point it out to him. You should shim under it before nailing if it won't go down with your weight.

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Yeah, 230 lbs doesn't do anything to it. I'll shim it up. In this area, they're 16" on center, but a skilled mudman should be able to deal with it, right?
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Old 12-26-2011, 10:05 AM   #25
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What do I do with 2x4 ceiling joists?


Since I'm going though the trouble of adding 2x10s at 16" on center, why don't I build so I can add a level at a later date?

Will the clipped ends of the ceiling joists present a problem when I go up?

What other considerations should I bear in mind as I add new ceiling joists?

Edit: I just framed an opening for the attic stair using 2x10s. Half of the header on the "landing" side rests on the top plate of a wall. I end nailed each 2x10 with 10d nails, and facenailed the two 2x10s together. I'm not worried about the absence of a hanger here, since one of the 2x10s rests completely on the top plate. I am concerned about the other end, where the outer header board is end nailed (4x10d per end, and one toenail to the joist) and facenailed to the interior board, which is also end-nailed to the perpendicular joist. Should I use a hanger on this header since I plan on adding a level at some point? Are the 45 nails on the hanger likely to split the lumber since I have aldready end nailed?

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Old 12-27-2011, 10:01 PM   #26
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What do I do with 2x4 ceiling joists?


Here on floor openings with hangers: http://publicecodes.citation.com/ico...002_par030.htm

Clipped joists, pp.33: http://books.google.com/books?id=iwS...num=3#PPA32,M1

Adding hangers is fine…..

Foamboard and canned foam to air seal the rim joists on exterior walls to skip at later date: http://www.buildingscience.com/docum...-at-rim-joist/
Keep a photo record for Inspector later.


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Old 12-27-2011, 11:11 PM   #27
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What do I do with 2x4 ceiling joists?


Thanks, Gary. I think I might be in trouble with the "1/2 original joist depth" criterion for the clipped floor joists. Would I measure the depth at the interior edge of the bearing surface? Can I do anything to repair the clipped ends if the depth is under 4-5/8"?
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Old 12-28-2011, 05:22 PM   #28
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What do I do with 2x4 ceiling joists?


R802.6 Bearing. The ends of each rafter or ceiling joist shall have not less than 11/2 inches (38 mm) of bearing on wood or metal and not less than 3 inches (76 mm) on masonry or concrete. From: http://publicecodes.citation.com/ico...002_par023.htm


Measure from the 1-1/2" in if on wood. Probably need an Engineers stamp to pass inspection if under code minimum.


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Old 12-29-2011, 08:04 AM   #29
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What do I do with 2x4 ceiling joists?


I think I'm good on the height if I get to measure from 1-1/2" in. I'll probably end up sistering a small piece of 2x10 to the end of each joist as a bearing surface to keep the bottom plate from rolling inward off the rim joist. The additional 2x10 pieces should also provide a little more shear strength.

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