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Old 07-12-2010, 05:05 PM   #16
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Seeking advice on framing plan


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Adding the ply layers "significantly" increases the Fb of the beam (although I can find any info of exactly how much).
I've seen charts that specify a 7% increase in Fb numbers when using plywood flitch plates with Douglas Fir and Larch.

Now, I don't know if those are repetitive increases (I wouldn't expect so), and I imagine the type of wood and number of plies would change those factors some....+/-.

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Old 07-12-2010, 05:48 PM   #17
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I'm glad others are answering.

When you contacted your B.D., did they tell you to double the snow loads on the overhangs? Might look into that....

Plywood in headers: http://www.finehomebuilding.com/how-...-up-beams.aspx

Be safe, Gary
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Old 07-12-2010, 06:15 PM   #18
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I find this thread really great. I'm looking for similar information regarding steel construction for such as garages, sheds, carports and I will open another thread to ask for it.

But in this thread could I just ask what software is being used to produce those excellent included drawings? And is it easy to learn/use?

I've been having a hard time finding some such software that I could quickly come to grips with and swiftly produce sketches of things I have in mind or have an interest in.

regards,

ab
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Old 07-12-2010, 07:36 PM   #19
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I find this thread really great. I'm looking for similar information regarding steel construction for such as garages, sheds, carports and I will open another thread to ask for it.

But in this thread could I just ask what software is being used to produce those excellent included drawings? And is it easy to learn/use?

I've been having a hard time finding some such software that I could quickly come to grips with and swiftly produce sketches of things I have in mind or have an interest in.

regards,

ab
I use Google SketchUp. It's free and it is easy. I think Julia is using something else... maybe Chief Architect. I began decades ago with AutoCAD R12, but SketchUp has all but replaced Auto Desk products for me. I can consistently produce reasonable renderings in 10 or 15 minutes. I love that capability.
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Old 07-12-2010, 08:31 PM   #20
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Seeking advice on framing plan


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Originally Posted by abrogard View Post
I find this thread really great. I'm looking for similar information regarding steel construction for such as garages, sheds, carports and I will open another thread to ask for it.

But in this thread could I just ask what software is being used to produce those excellent included drawings? And is it easy to learn/use?

I've been having a hard time finding some such software that I could quickly come to grips with and swiftly produce sketches of things I have in mind or have an interest in.

regards,

ab
Actually I'm also using SketchUp - and like Willie says it's fairly easy, although it did take me a couple of days of practice before I could do much with it.
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Old 07-12-2010, 08:42 PM   #21
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Yes, a lot of the vertical support is regained with good, snug-fitting, cross-members. But when the inertial moments are stressed, as they would be from side loading wind factors, at least one direction proves to be weaker than the un-notched piece would have been.

I happen to love Timber Framing, and I think (although extra work) mortising in the heads of angle braces and cross-members would be sharp.
Okay, all the big notches are gone and I was able to use the wall blocking as deadmen for the siding girts.

I've put Simpson LUC26Z concealed flange hangers in for outer 2x8 joists and beams (it seems to be the only concealed flange hanger they make for 2x), but I don't know if these will be strong enough to use on the front and rear beams - I might have to attach actual slabs of lumber to act as deadmen there (blech).
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Old 07-12-2010, 08:59 PM   #22
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I'm glad others are answering.

When you contacted your B.D., did they tell you to double the snow loads on the overhangs? Might look into that....

Plywood in headers: http://www.finehomebuilding.com/how-...-up-beams.aspx

Be safe, Gary
They told me not to use post-frame construction, and that I'd need a 48" deep poured foundation . . . I didn't pursue matters any further with them.

I'll investigate this double-snow-load-on-overhangs - I hope that's not structurally required (it doesn't matter if it's code required, it won't be inspected since no one cares about outbuildings where I'm building).

Hmmm - I'm not sure how to relate "bending resistance factor" to design bending value.
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Old 07-12-2010, 09:07 PM   #23
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I've seen charts that specify a 7% increase in Fb numbers when using plywood flitch plates with Douglas Fir and Larch.

Now, I don't know if those are repetitive increases (I wouldn't expect so), and I imagine the type of wood and number of plies would change those factors some....+/-.
Drat - 7% isn't enough, I need a 33% increase.
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Old 07-12-2010, 09:08 PM   #24
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I keep stabbing at your drawings with my mouse, thinking they are SKP files. And they just won't orbit!

You do know this forum allows you to attach small SKP files? You'd probably have to remove the colors to get it small enough, but it's doable.
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Old 07-12-2010, 09:20 PM   #25
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I keep stabbing at your drawings with my mouse, thinking they are SKP files. And they just won't orbit!

You do know this forum allows you to attach small SKP files? You'd probably have to remove the colors to get it small enough, but it's doable.
Actually, I keep doing that too

I noticed that, but the SKP file I'm working with is 10MB (it contains everything, in lots of layers), and it's easier to just export 2d jpg's of the current view than to create a new (smaller) SKP file each time I want to post something.
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Old 07-12-2010, 09:27 PM   #26
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Know watcha mean. They do get big in a hurry. I recently did a dozen, or so, concept drawings of a very economical house for some missionaries in Ghana. It got to be a minor headache just emailing the files back and forth.
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Old 07-12-2010, 09:30 PM   #27
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Well, I gave it a shot - I saved a copy of the file and deleted all but two layers and the colours and got the file down to 9.5MB. Since the max you can attach appears to be 1MB I'm thinking not doable in this case.
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Old 07-12-2010, 09:35 PM   #28
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Don't forget to take the front let-in braces out of the built beams for full continuous strength.

Be safe, Gary
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Old 07-12-2010, 09:35 PM   #29
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Oh well. Good try. Usually when the half dozen of us that really get into SU want some detailed input on a particular drawing, we just go the email route. If you ever find yourself wanting that level of scrutiney of a model, there are several guys here willing to take a look for you...... and most of them are way better than I am.
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Old 07-12-2010, 09:36 PM   #30
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Know watcha mean. They do get big in a hurry. I recently did a dozen, or so, concept drawings of a very economical house for some missionaries in Ghana. It got to be a minor headache just emailing the files back and forth.
Huge files are to be expected when designing a house though (unless by "economical" you mean shack lol), I'm pretty sure 10MB is overkill when designing a screen room (e.g., I probably didn't need to precisely replicate all the Simpson fasteners I'll use, or the screen door I plan to install...).

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