View Full Version : Gable overhang/Lookout rafters
Jackhammer
03-03-2005, 05:45 AM
Can someone explain the best method of constructing a 12" overhang on the gable end?
I was told that building a "ladder" or similar term would be the best but I don't know how to go about building it or attaching to the existing rafters.
I have my ridge board extending outward 2' on each end. How much of the board should be cut?
This is hard to explain on here.
I will try to post again, when I write it all out so that you can understand it.
Jackhammer
03-03-2005, 06:11 AM
Cole_21 since it's hard to explain you are more than welcome to come show me in person. Afterall it's only about 250 miles. LOL
The pays not all that great but I furnish all the coffee and Little Debbie snacks you can eat........
I'll bet Joe Carola would like to add something to this..........
giddonah
03-03-2005, 06:33 AM
Yeah Cole, get out of the office, it's not like you're actually DOING anything :lol:
Yeah Cole, get out of the office, it's not like you're actually DOING anything :lol:
your right. :lol: :lol:
perks of being a boss. :oops:
Jackhammer
03-03-2005, 05:27 PM
This is hard to explain on here.
I will try to post again, when I write it all out so that you can understand it.
Cole, are you still writing it out? :lol:
I totally forgot I will work on it tonight. Look for it tomorrow morning.
Building Gable End Overhangs
Sometimes gable end trusses are made 1-1/2" or 3-1/2" shorter than the other trusses you order. That's to help you extend the roof out a few inches over the gable end.
Once the other trusses are in place but before you start sheathing, mark the tops of the gable end trusses and the trusses next to them 24" on center.
Cut a series of 2x4 lookouts to a length equalling the distance between the 2 ends trusses plus the length of the overhang (usually 6 to 12 inches).
Nail the lookouts in place with their ends nailed to the sides of the first full trusses and the other ends running out over the gable end trusses with the tops of the lookouts flush with the tops of the full trusses (lookouts on edge if the gable end trusses are 3-1/2" shorter than the other, lookouts on sides if the gable end trusses are 1-1/2" shorter than the others).
Nail 2x4's cut to the proper length along the ends of the lookouts to strengthen the overhang.
NOTE: If the gable end trusses are the same height as the other trusses, you can build overhangs 2 ways:
* By framing 2x4 "ladders" and nailing those along the tops of the gable end trusses.
* By extending the sheathing past the gable end trusses, nailing 2x4 "fly rafters" to the bottom of the sheathing along the outside edge of the overhang and securing 2x4 nailers under the sheathing along the gable end trusses, parallel with the fly rafters.
You can do this with regular rafters also.
How big of a overhang are you going?
Jackhammer
03-03-2005, 07:06 PM
Cole, I have all my rafters in place. The end rafters are flush with wall studs.
I was planning to have a 12" overhang in front and back to match the sides but I wasn't sure how I was going to accomplish the task.
Jackhammer
03-03-2005, 08:32 PM
Building Gable End Overhangs
Sometimes gable end trusses are made 1-1/2" or 3-1/2" shorter than the other trusses you order. That's to help you extend the roof out a few inches over the gable end. NO TRUSSES USED
Once the other trusses are in place but before you start sheathing, mark the tops of the gable end trusses and the trusses next to them 24" on center. I'M NOT SURE OF THE TERM GABLE END TRUSS.
Cut a series of 2x4 lookouts to a length equalling the distance between the 2 ends trusses plus the length of the overhang (usually 6 to 12 inches). I DON'T UNDERSTAND THIS. ?????? PLEASE ELABORATE.
Nail the lookouts in place with their ends nailed to the sides of the first full trusses and the other ends running out over the gable end trusses with the tops of the lookouts flush with the tops of the full trusses (lookouts on edge if the gable end trusses are 3-1/2" shorter than the other, lookouts on sides if the gable end trusses are 1-1/2" shorter than the others). AGAIN COLE, I DON'T UNDERSTAND WHAT YOU MEAN BY FIRST FULL TRUSS. COULD YOU POSSIBLY PROVIDE A DRAWING SO I CAN SEE EXACTLY TO WHAT YOU ARE REFERRING. IS THIS THE BASIC 101 VERSION???Nail 2x4's cut to the proper length along the ends of the lookouts to strengthen the overhang.
NOTE: If the gable end trusses are the same height as the other trusses, you can build overhangs 2 ways:
* By framing 2x4 "ladders" and nailing those along the tops of the gable end trusses.
* By extending the sheathing past the gable end trusses, nailing 2x4 "fly rafters" to the bottom of the sheathing along the outside edge of the overhang and securing 2x4 nailers under the sheathing along the gable end trusses, parallel with the fly rafters.
You want to put a band ( 2x4 ) on the outside of the wall on the pitch of the roof. ( flush with the top )
Then you want to cut your lookouts like it has in the picture. If you have a 1' overhang you would cut your lookouts - ( 9" ) put them in on the pitch of the roof, every 16" or so. ( the more you put the stronger it will be )
Now, when you have those nailed in place, put your outside band on them and keep the top flush with your ridge and the bottom flush with your soffit overhang. And nail it to your lookouts.
What pitch is your roof?
When I mean band, both of those should be cut with your pitch on top which is a 5/12 and 5/12 perpendicular on the bottom so it sits flat on your bottom soffit.
I told you that this is going to be tough. :D
Keep asking questions though, i dont care at all.
You are planning on going with a 12" overhang on every side, right?
Jackhammer
03-03-2005, 08:54 PM
You want to put a band ( 2x4 ) on the outside of the wall on the pitch of the roof. ( flush with the top ) :roll: WOULD I USE A 2X4 EVEN THOUGH I HAVE 2X6 RAFTERS? DO I NAIL THIS DIRECTLY ONTO THE EXISTING END RAFTER?
Then you want to cut your lookouts like it has in the picture. If you have a 1' overhang you would cut your lookouts - ( 9" ) put them in on the pitch of the roof, every 16" or so. ( the more you put the stronger it will be )
Now, when you have those nailed in place, put your outside band on them and keep the top flush with your ridge and the bottom flush with your soffit overhang. And nail it to your lookouts.
What pitch is your roof? 5/12
When I mean band, both of those should be cut with your pitch on top which is a 5/12 and 5/12 perpendicular on the bottom so it sits flat on your bottom soffit.
Yes you would use a 2x4 but keep it flush with the top.
Have you run all your playwood on the gable end wall all the way to the top?
Jackhammer
03-03-2005, 09:16 PM
Yes you would use a 2x4 but keep it flush with the top. OK, LET ME SEE IF I'VE GOT THIS RIGHT... :shock: I NAIL THE 2X4 FLUSH WITH THE END 2X6 RAFTERS. SHOULD THESE BE CUT THE SAME AS THE RAFTERS, WITH THE BIRDSMOUTH AND RIDGE ANGLE? I STILL HAVE ABOUT 2' OF THE 2X8 RIDGE BOARD EXTENDING OUTWARD PAST THE END RAFTER.
Have you run all your playwood on the gable end wall all the way to the top? WHAT IS PLAYWOOD? :idea: IF THIS IS THE SAME THING AS PLYWOOD THE ANSWER IS NO. DO I NEED TO DO THIS BEFORE I GO ANY FURTHUR?
Jackhammer
03-04-2005, 05:58 AM
Cole, I'm still hangin in the air....... Any advice on the previous post? Thanks
giddonah
03-04-2005, 06:40 AM
http://www.socomp.com/gabt1.jpg
You can see here what Cole is talking about. A gable truss is just a little shorter so when you put the 2x4's on the top, it makes it flush for the plywood decking. I know you're not using trusses, but I would imagine something similar for rafters. And playwood is just a typo.
Jackhammer
03-04-2005, 06:52 AM
giddonah, from the illustration it looks like the lookouts extend inward to the second rafter. Is this right?
If so do you have to notch out the end rafter in order to remain flush for the decking?
Set your saw at 1"5/8 and cut a notch 3"1/2 in the truss and lay them down and nail them to both.
Everyone doesnt have to be like that. I would just put some like that and then attach the other lookouts to the outside truss ( rafter )
Thanks for the pic, giddonah.
dhill
03-04-2005, 08:08 AM
Yes, you have to notch the rafter.
giddonah
03-04-2005, 08:14 AM
or you can put in a half notch in each board. This is a lot more work, but would make a tighter fit.
giddonah
03-04-2005, 08:16 AM
lol, playwood :lol:
Jackhammer
03-04-2005, 09:42 AM
lol, playwood :lol:
I thought that might be another new term I was about to learn... :lol:
Ok, I think I got it for now.. Thanks alot for the responses
If you have any other questions feel free to ask.
Good Luck.
Jackhammer
03-05-2005, 05:58 AM
http://www.socomp.com/gabt1.jpg
You can see here what Cole is talking about. A gable truss is just a little shorter so when you put the 2x4's on the top, it makes it flush for the plywood decking.
Do I need to stagger my decking as shown in the illustration?
Yes you should stagger on walls, floors, and roof.
Joe Carola
03-05-2005, 06:03 AM
Learning,
You have to stagger the plywood for roof decking, floor decking and the walls.
Joe Carola
Jackhammer
03-05-2005, 06:08 AM
Thanks, good to hear from Joe. I thought he had taken a vacation..
Jackhammer
03-05-2005, 07:48 AM
[quote="Cole_21"]Set your saw at 1"5/8 and cut a notch 3"1/2 in the truss and lay them down and nail them to both.
Cole, I was just curious why you would set the saw at 1"5/8 when the 2X4 is only 1"1/2. Would you not have 1/8" space under the lookout if the top was flush?
[quote=Cole_21]Set your saw at 1"5/8 and cut a notch 3"1/2 in the truss and lay them down and nail them to both.
Cole, I was just curious why you would set the saw at 1"5/8 when the 2X4 is only 1"1/2. Would you not have 1/8" space under the lookout if the top was flush?
Yes, but sometiems it doesnt always work like it supposed too.
Set your saw at 1"1/2 and go from there.
Jackhammer
03-05-2005, 09:21 PM
Cole, I slotted my rafters and got my lookouts nailed in but I gotta nother question.
Since I've got a 2X8 ridge beam and 2X4 lookouts will I have to use a 1X8 trim board to cover the ridge beam. :roll:
Your ridge board can be cut flush to the wall - it doesn't necessarily have to extend out to the subfascia.
bkrahmer
03-06-2005, 09:58 PM
Go to your local bookstore, and find this book: http://www.amazon.com/exec/obidos/tg/detail/-/0806985941 There are diagrams along with explanations for at least a couple different methods of building overhangs.
If everything else is in place, you may have to build the ladders and face nail them. This method isn't as strong, but may work for you.
Dragon
03-07-2005, 04:02 AM
Cole, I slotted my rafters and got my lookouts nailed in but I gotta nother question.
Since I've got a 2X8 ridge beam and 2X4 lookouts will I have to use a 1X8 trim board to cover the ridge beam. :roll:
notch your ridge board at the wall so that it will plane in with your soffit.
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