3D Truss Models
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Again I apologize for the delay in development, first it was my new job and then I re-injured my rotator cuff (old injury from 10 years ago) which has made sitting at my desk for prolonged periods very difficult.
This morning I sat down and thought about hip sets since I've had some recent requests for the their addition to the plugin. What I show below is a fairly standard step down hip set with, with the midwest variant shown at one corner and the standard variant at the other corner.
View model here:
https://3dwarehouse.sketchup.com/model.html?id=aa9db54b-4a66-412e-86fd-94e3e676e0b5
Note, I have not shown all of the internal webs for clarity, those will be generated automatically and not be user definable.
Please review carefully and let me know if anything looks amiss. I will also be adding in other variants of the hip set but I figured I would start with these two.
A stepdown hip set provides a girder truss, with a hip jack truss running from the corners up the ridge until they meet the hip girder.
The Midwest hip set also provides a girder truss, with hip trusses that step up to the peak.
However in a Midwest hip set, you run a rafter (dropped) up from the corner of the front wall to the hip girder.
All the bottom chords of the end jacks run to the hip girder, allowing for better attachment of the drywall on the ceiling. -
This is the Northeast Hip Set variant:
View model here:
https://3dwarehouse.sketchup.com/model.html?id=7a091720-b221-4b49-b59b-f797f95211e6
In a northeast hip set, you will find a short jack truss starting at the corner and running up the hip ridge. This hip jack stops at a sub-girder. All end jack bottom chords run to the hip girder, allowing for better attachment of the drywall on the ceiling. Hip cats must be field cut and installed between the hip trusses. Works well with dual-pitched hip systems.
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This is the California Hip Set:
View model here:
https://3dwarehouse.sketchup.com/model.html?id=c17f8767-de27-44bd-b589-fbb186ea09fc
The problem I am having with this variant is the conflict between the 2x6 hip rafter and the top chords of the step down hip trusses.
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The revised california hip set with a stacked hip rafter:
View model here:
https://3dwarehouse.sketchup.com/model.html?id=97644895-c988-435c-bdc4-c7b8956a6d46
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A stepdown or midwest hip set with a drop-in purlin frame:
View model here:
https://3dwarehouse.sketchup.com/model.html?id=5d01af7e-a966-42c2-8355-88b5964e6d8c
There is some minor conflicts at the top chord of the frame with the hip trusses and at the peak but I don't think it is worth worrying about.
I have found that for manual editing of members the "trim" function is becoming a very valuable tool, it has already saved me a lot of time when adjusting webs and chords as I adjust or drop some of the hip truss top chords. I strongly suggest that everyone upgrade to the latest version (1.6.8) to take advantage of the improved trim function. I now need to get the extend function working.
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A smaller (16' span) standard terminal hip set attached to the main roof with girder truss and valley set.
View model here:
https://3dwarehouse.sketchup.com/model.html?id=beb29cf5-e571-42ab-8df5-526793a49332
The addition of the hip sets into the plugin will allow the creation of more complex hip roofs with minimal manual intervention.
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I now just need to hunker down and get some heavy coding done to make all of these hip set variants a reality. Once I have one the rest will fall out fairly easily since the overall logic for all the variants are quite similar. I've spent the last 2-3 days reviewing some texts and shop drawings to make sure I've got things more or less correct with my models/templates. So far no one has complained to loudly about any of the configurations so I think it is now time to proceed and add the hip sets into the plugin.
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Version 1.6.9 - 09.14.2016
- Added some enhancements and wireframe (temporary) graphics to the valley set function.
- Fixed bug in the trim function.
- Fixed bug in the roof battens option.
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If its not one thing its another. I finally get myself situation so that I can get back to some daily coding and then I injure my shoulder (bursitis) and put myself out of commission. I've almost got the first truss hip set ready for release. I think everyone will be excited to see what it can do.
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dang dude, what's the recovery time on that?
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Hope you're feeling better soon. I had shoulder joint pain (they thought it was impingement) and it took a long time to get better. Using exercise from the therapist and working out seemed to be helpful. I think computer work was the problem. I think paddling (racing) was the cure for me but I still have some soreness lower in that arm sometimes.
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I think the original injury (rotator cuff, partial tear) was somehow reinjured which has caused inflammation (bursitis) which then has lead to impingement, long story short when I sit at a computer and use a mouse or keyboard for more than about 5 minutes I'm in pain, this is ridiculous.
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I've been flat on my back for a week in bed. Yesterday I somehow willed myself to go to work, put on a shoulder brace, medicated and endured 8 hours of pain. Came home, ate dinner, and went right to bed. Woke up this morning and the pain has all but mysteriously disappeared. You tell me?
Crossing my fingers that this is real, tonight I might be back in the saddle
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@medeek said:
I've been flat on my back for a week in bed. Yesterday I somehow willed myself to go to work, put on a shoulder brace, medicated and endured 8 hours of pain. Came home, ate dinner, and went right to bed. Woke up this morning and the pain has all but mysteriously disappeared. You tell me?
Crossing my fingers that this is real, tonight I might be back in the saddle
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Be well!
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Still out of commission but I am slowly improving. I've been making very slow progress on the stepdown hip set maybe I can get it out by this weekend. I have a lot of people requesting it so I'm excited to actually get it released after promising everyone that it would be out 2 months ago.
After this experience all I can say is without your health you are pretty much nothing.
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I've been slowly working on the stepdown hip truss set. Its been a bit more complicated than expected. I've also decided to make it auto select the common truss type by span but also allow the user to manually select the common truss type as well, yet another level of complexity. In addition I would also like to enable raised heels which again adds to the complexity of the required logic and amount of code required to make this work.
The user will be able to select the hip setback. This is usually 3x or 4x the truss spacing (ie. 6ft, 8ft with 24" o/c truss spacing). I could restrict this to some multiple of the truss spacing but I think I will leave it completely open ended for the user.
Once I have the initial module complete I will then add into the advanced options the ability to use a drop-in purlin frame.
Another item to consider is the depth of the top chord and bottom chord of the jack trusses, this should be independent from the main trusses. Typically all of this is determined when the trusses are engineered (ie. Mitek software) but in this case we are not engineering these trusses, merely generating the geometry so all of these values become user determined.
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Thanks for being so thorough, Nathaniel! Looking forward to the next update of your amazing plugins!
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If I'm going to take the time and energy to program something like this I might as well do it right. Even with that attitude I still miss a few things.
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Yesterday I finally had the MRI done on my neck. They found a herniated disk between my C6 and C7 vertebrae which was pinching the nerve extending into my arm (cervical radiculopathy). This explains all of my symptoms. I don't know why it took almost 2 months for them to figure this out but it did. It is very strange that I would have so much localized pain in my shoulder though but I guess it turns out it is my neck, crazy.
I think it is healing itself over time but it could just be the painkiller (GABAPENTIN) is working fairly well at the moment. I'm waiting on a cervical epidural steroid injection at the injury site. If this does not work it may be surgery since the symptoms in my right arm are quite severe and debilitating, and not something I can live with long term.
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