I am not sure what to call this...
(http://img398.imageshack.us/img398/8267/splicetg9.jpg)
I have 2 2x10s through bolted to a post. I'd like to offset them by ~1" (to keep the porch just higher than the deck). Then I'd like to put my joists offset as well. Since the joist wouldn't be bearing on both beam parts (like the rest of mine are), I thought I should "splice" them with a 2x8 or something (yellow in pic). Maybe some construction adhesive and 6 16ds for the 2x8s?
Does that sound OK?
I'm not sure what you'd call that either ???
Here's a few question and suggestions.
You say you want the 'porch' higher than the 'deck'?
So is it a covered porch and the deck your talking about is the deck / floor of the cabin?
If so you really want the porch ( outside deck even if it's covered) LOWER , if possible, than the floor of the cabin. It's easier to flash that way, water doesn't run 'up hill ,( as easy as it runs down hill).
You should block between those joist , over both of your thru bolted 'beams'. The say they can roll over if there not blocked, and the blocking will stiff the floor. The gussets you show will tie them together for length but not much more than that.
I also suggest ripping the inch off the one 'beam' so the bottoms can remain flush. Even if that's a under floor crawl space with the beams flush on the bottom insulating , plumbing , heat ducts etc all will be easier , IF they a flush. It avoids another thing to adjust for/ go under/ duck around.
Thanks for the reply PEG. The subfloor is higher than both of these. The 'Porch' will be a screened in area with a shed roof (off the gable side - 20' side). The deck is a long outdoor deck running the entire 32' direction plus the 8' of the porch. So I will step down out of the house and then would like to step down again (through a screen door) to the deck (more of just sweep down - I don't think I'll notice the >1" step).
I started thinking about this when I came into some free t&g PT 'porch flooring'. It is only 3/4" thick while my deck boards are 5/4. So I wanted to discourage water/trash from getting in the porch.
So there will not be any plumbing etc under these.
1. Should I gusset the both sides? Or is one sufficient?
2. Now knowing that it is a deck (2x10 joists / ~ 10' span / 16" oc / attached to deckboards with deck screws), do I need the blocking?
3. If so, should I block over the beam where the gusset is or the middle of the span?
4. Since nothing is under it, I don't need to rip the joist. Right?
Thanks!
If I'm following you right you only have this joist situation for the 8' where the porch on the gable end , meets the deck running the length of the house?
If so why not off set the joists so one runs past the other ( yes you'd have to rip the 1" off the deck joist where it went over the 'porch beam' then nail the joist together with 16 d galv.
Then block over one or the other of the two 'beams'.
That would be a better tie together than a gusset. But you should , all most always, block over beams, there are few exceptions to that rule of thumb.
Then again I may be confused with what your doing. Written / verbal descriptions are hard to follow a drawing or building plan , much easier.
Got it. Thanks. Posting a pic for future readers.
(http://img364.imageshack.us/img364/2130/splice2qf0.jpg)
Bring the knotch on the green joist back over the other beam then both beams will be in bearing for both sets of joist. A win, win.
Instead of notching, could the higher set of porch floor joists be raised by short spacers (strips of ripped decking board material) placed underneath? Both beams would be same height ... the spacers would extend across both beams.
In my experience of weathering decks, I would install blocks at the beams and mid-span ... just to mimimize twisting.