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Rafter to Ridge Beam Connection

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#22 ·
I have done them with and without hardware. We have had a few where nothing was called out, and we just nailed them like we would any other rafter. A ridge beam is sized so that no collar ties are needed, and as long as the rafter is properly sized, you are good to go. Probably a good idea to provide some kind of straps to the post/ridge connection, as well as the post/slab connection.
 
#25 ·
I'd like to respectfully disagree with everyone. There are not gravity forces holding them to the ridge that happen when you have rafter ties or CJs.

In a vaulted ceiling, rafters are essentially the same as a floor joist. You wouldn't just toe nail those to the face of a beam. You would bear those on a beam, a plate, or a joist hanger, wouldn't you?
 
#26 ·
Golden view said:
I'd like to respectfully disagree with everyone. There are not gravity forces holding them to the ridge that happen when you have rafter ties or CJs.

In a vaulted ceiling, rafters are essentially the same as a floor joist. You wouldn't just toe nail those to the face of a beam. You would bear those on a beam, a plate, or a joist hanger, wouldn't you?
Click to expand...
I pray your joking.......[emoji15] ?! Rafters in this configuration absolutely function independent of Cj's and collar ties

Sent from my SAMSUNG-SM-G930A using Tapatalk
 
#27 ·
NJGC said:
I pray your joking.......[emoji15] ?! Rafters in this configuration absolutely function independent of Cj's and collar ties

Sent from my SAMSUNG-SM-G930A using Tapatalk
Click to expand...
Agreed. Not joking. Are we talking about different things?

Rafters without CJs or rafter ties (not to be confused with collar ties), attached to a properly sized structural ridge, have no rafter thrust. Only downward loads, just like a floor joist. This is why both ends must have adequate bearing. That's all I'm saying.

This is in contrast to a traditionally framed roof, with a non structural ridge. In this case, rafter thrust is restrained by CJs, so the top plumb cut of the rafter pushes horizontally either on the non structural ridge board or the other rafter if there is no ridge board.
 
#30 · (Edited)
No it has TnG on the plans


I recommended a link to RR (rafter to ridge ) or LRZU Simpson brackets last night if he's worried about nailing

I'm sure he's about got that sucker framed by now

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#31 ·
Golden view said:
Rafters without CJs or rafter ties (not to be confused with collar ties), attached to a properly sized structural ridge, have no rafter thrust. Only downward loads, just like a floor joist.
Click to expand...
Not entirely true. When you lean a ladder against a wall, while most of the load is downward, some of it is sideways also. If not, you wouldn't need the wall. ;)

I'll grant that your argument isn't completely without merit. There is potential for slippage with a huge roof and/or heavy snow loads. But for a screen porch? Nah.
 
#34 ·
Golden view said:
I'd like to respectfully disagree with everyone. There are not gravity forces holding them to the ridge that happen when you have rafter ties or CJs.

In a vaulted ceiling, rafters are essentially the same as a floor joist. You wouldn't just toe nail those to the face of a beam. You would bear those on a beam, a plate, or a joist hanger, wouldn't you?
Click to expand...
We used to toenail and pressure-block, No reason to make this situation complicated unless the OP has regional reasons to install hardware it is not needed
 
#35 ·
Just look at TABLE R602.3(1) FASTENING SCHEDULE Item #7

Toe Nail
Roof rafters to ridge, valley or hip rafters or roof, rafter
to minimum 2″ ridge beam: 4-16d (3 1/2″ × 0.135″ ); or
3-10d common (3 1/2″ × 0.148″
); or
4-10d box (3″ × 0.128″ ); or
4-3″ × 0.131″ nails
----------------------------------------
End Nail

3-16d box 3 1/2″ × 0.135″ ); or
2-16d common (3 1/2″ × 0.162″
); or 3-10d box (3″ × 0.128″ ); or 3-3″ × 0.131″ nails
 
Discussion starter · #36 ·
Well we got everything up today. Toe nailed 3 nails one side, 2 the other, and 1 through the top of the rafter into the ridge. The inspectors here are very lax usually and I'm not expecting an issue. If there is one, I'll be reporting back I guess.

Thanks for all the answers guys. I appreciate the feedback and the dialogue on the issue.

Image
 
#40 ·
Xtrememtnbiker said:
Well we got everything up today. Toe nailed 3 nails one side, 2 the other, and 1 through the top of the rafter into the ridge. The inspectors here are very lax usually and I'm not expecting an issue. If there is one, I'll be reporting back I guess.

Thanks for all the answers guys. I appreciate the feedback and the dialogue on the issue.

Image
Click to expand...
The biggest concern for rafter attachment over a ridge and exposed finish underneath is wind up lift.

Does not sound like much of an issue until it happens....
 
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