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Old 07-16-2012, 12:51 PM   #16
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Bowed Rafter Supports


I don't have the table. I have 20 years of framing roofs. You guys shouldn't have to take courses and learn tables. To get your degree you should be on the jobsite minimum 3 years. Every good carpenter I know feels the same exact way. You can draw whatever you want. Making it happen is a completely different story.... The rafters do hold themselves up with the force against each other.. The rafters get nailed to the top plate of the wall and minimum 4 nails into the ceiling joist(pending on project and engineers specs) that is what holds them up.. .Collar ties also prevent them from spreading. You can learn whatever you want on paper. .

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Old 07-16-2012, 12:56 PM   #17
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You don't need a ridge to hold up rafters in a conventional roof. You could plumb cut all your rafters with no ridge, one toe nail on top and they will hold up by themselves as long as they are nailed at the wall and joist. The ridge is there simply for nailing purposes. If anything, the rafters hold up the ridge.
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Old 07-16-2012, 01:16 PM   #18
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Tell me sir. Then what are the purpose of collar ties.
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Old 07-16-2012, 01:19 PM   #19
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I design all the time.. When I receive a set of plans stamped by the architect and engineer I look it over and send it back with the RFI's , and then I sketch up how they should have drawn it, most of the time they come back with an approval.. Every once in a while I overlook something and my #'s don't add up, but hey, I'm far from perfect.
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Old 07-16-2012, 01:37 PM   #20
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I will assume you made a misstatement and meant RAFTER ties.

We will get nowhere on this when you do not have the math background to know why your plans are approved or not. Many times a design that will work on a small house will not work on a large one.

Which comes back to the start of all this. The reason the support most likely does nothing is because this is a very small house with a fairly steep roof. The forces are very low compared to say a roof that was almost flat with a span of 30ft.
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Old 07-17-2012, 01:07 AM   #21
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Wow - lots of action on this while I was at work today. I don't want to tick off you fine folks who have given your time to help me with this, so I think the best thing for me to say is: I appreciate all the on-topic replies and education efforts! Let's please keep it civil, though.

CopperClad -for a slightly zoom-out view, look at the first two pics in post #3.

Bill - re. your post #8. It appears it goes to a wall top plate. Based on the relative position to the A/C handler, it's probably the wall between the dining area and the micro-hallway to the garage, laundry room, and master bedroom. Unless there's something underneath it in that wall that goes all the way to the slab, it ends at that plate. And you're right - this is almost a pyramid hip roof. If you look in this post Ridge or Static Vents on Multi-level Hip Roof you can see the overhead view in the first pic of that thread - the section in question is the larger almost-hip-pyramid at the back of the house where the white dot (roof turbine) is. As for size, sq ftg of the living area is approx. 1850 - attic sq ftg is closer to 3800 (that pyramid in question covers the entire back patio, master bedroom, master bath, laundry, & eating area).

Again, thanks for the help from all of y'all!

Last edited by texasprd; 07-17-2012 at 01:17 AM.
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Old 07-20-2012, 11:44 PM   #22
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Civil it shall be, our first forum rule is "treat all members with respect" found at the bottom right-hand corner of every page under "Privacy Statement" and "Terms of Service", Thanks. Posts have been removed as per rules.

That said, I'll add my 2 cents: IRC calls for a hip/valley support to bearing wall or designed (engineered) to carry point loads, opposite each other with a ridge board or not; http://publicecodes.citation.com/ico...002_par017.htm

IBC requires only ridge board, opposite, but no support mentioned; http://publicecodes.citation.com/ico...008_par050.htm

The OP is in TX, under the IBC: http://www.reedconstructiondata.com/...g-codes/texas/ Check locally with the AHJ if concerned.

Collar ties: http://publicecodes.citation.com/ico...002_par018.htm

http://www.finehomebuilding.com/how-...llar-ties.aspx

Gary

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