3D Truss Models

Re: 3D Truss Models

Postby medeek » Fri Dec 11, 2015 3:42 pm

I've added an extra input for the beam which allows ones to specify the overhang of the beam from the outside of the wall. With zero overhang the beam will be flush with the wall framing and not exposed. If the beam overhang is less than the gable overhang, the fly will be as shown below (up to the roof peak). If the beam overhang is greater than the gable overhang it will project past and the fly will adjust accordingly. The beam overhang is not restricted in any manner.

0
Nathaniel P. Wilkerson PE
Medeek Engineering Inc
design.medeek.com
User avatar
medeek 
PluginStore Author
PluginStore Author
 

Re: 3D Truss Models

Postby medeek » Fri Dec 11, 2015 4:03 pm

I remember a few years back when I was in college and working a side job as a construction laborer we framed up a roof similar to this. The rafters were large I-Joists (TJI 560 equiv.) and were hangered from the glulam beam. The beam was probably almost 2 feet deep. I just remember I was glad I was cutting the blocking on the miter saw and not the one at the peak of the roof setting the rafters into the hangers.

With that being said I am wondering how often I-Joists are used in this type of application versus common lumber. I can probably add in an option to use them instead of common lumber. One question I have though is what to do at the other end, where they bear at the wall. I would need to study this further.
0
Nathaniel P. Wilkerson PE
Medeek Engineering Inc
design.medeek.com
User avatar
medeek 
PluginStore Author
PluginStore Author
 

Re: 3D Truss Models

Postby pbacot » Fri Dec 11, 2015 5:04 pm

The I-joists are used often here in northern California--I couldn't say HOW often. Not a great deal. I know that on the last project we tried to use them, due to the inability to cut them for various conditions, and the special requirements for bearing, and relative strength, we changed the design to microlams. They are also not as easy in fire rated assemblies.

You are making quite a huge extension! Are various members produced in components for modification afterwards? For example one were to modify all tails. I say this because, obviously you are getting close to realistic representation, but if one is seriously using this to show an actual structures, they will want to add modifications, which occur in every building and can't be put into a plugin.
0
MacOSX Mojave ShetchUp Pro v19 Twilight Pro v2 M2 Kerkythea PowerCADD
User avatar
pbacot 
Top SketchUcator
 

Re: 3D Truss Models

Postby medeek » Fri Dec 11, 2015 5:34 pm

All of the pertinent details for I-Joists can be found here:

http://www.woodbywy.com/document/tj-4000/

All have to think about this one. The problem with I-joists is the bevel cuts are more difficult since it requires more operations to model. The outlookers at the gable ends would need to notch around the top flange of the I-joist. A double or single bearing plate is required at the ridge or hangers from the beam, notching at the high end of the roof joist is not allowed. Birdsmouth cut at the low end of the joist is allowed but requires web stiffeners on both sides of the joist.

If I can figure out a good method of making the beveled cuts of complicated profiles that would greatly facilitate things.

Update:

I think if I actually model the I-Joist as three groups, make all the necessary cuts and then union them together I may be able to stick with my simple modeling method points -> face -> pushpull
0
Last edited by medeek on Sat Dec 12, 2015 2:45 am, edited 2 times in total.
Nathaniel P. Wilkerson PE
Medeek Engineering Inc
design.medeek.com
User avatar
medeek 
PluginStore Author
PluginStore Author
 

Re: 3D Truss Models

Postby medeek » Fri Dec 11, 2015 5:38 pm

pbacot wrote:
You are making quite a huge extension! Are various members produced in components for modification afterwards? For example one were to modify all tails. I say this because, obviously you are getting close to realistic representation, but if one is seriously using this to show an actual structures, they will want to add modifications, which occur in every building and can't be put into a plugin.


Fortunately, someone pointed this out to me fairly early on so I have made it a point to make certain elements components and groups in a sensible fashion.

Common trusses and rafters are always components so that modifying tails etc... can be done quickly and easily. Other items such as fascia, outlookers, sheathing, beams etc... are not components but groups (solids).

Also now that I think about it the outlookers should also be components rather than just groups, added to the "todo" list.
0
Nathaniel P. Wilkerson PE
Medeek Engineering Inc
design.medeek.com
User avatar
medeek 
PluginStore Author
PluginStore Author
 

Re: 3D Truss Models

Postby medeek » Fri Dec 11, 2015 6:57 pm

Glulam beams in the UK seems to be fairly standardized:

Standard Widths: 90, 115, 140
Depths: 225, 270, 315,360, 405, 450, 495

Ply: 45mm
0
Nathaniel P. Wilkerson PE
Medeek Engineering Inc
design.medeek.com
User avatar
medeek 
PluginStore Author
PluginStore Author
 

Re: 3D Truss Models

Postby medeek » Sat Dec 12, 2015 2:49 am

With I-joist roofs don't think I would model in any of the web stiffeners, otherwise the model gets too heavy, same goes for small fasteners and hangers.

I haven't even considered the option yet with the rafters resting on top of the beam (dropped ridge). The I-joist manufacturers do not allow notching at the top end and therefore a beveled bearing plate or strip is required with web stiffeners on both sides of the I-joist. Their detail shows a strap across the tops of the I-joists tying them together across the beam, I'm pretty familiar with this detail from some local jobs I've done recently. However, I'm also wondering about the beveled strip on top of the ridge beam, how is it made, thickness at the butt etc...

With common sawn rafters how would you typically handle a dropped beam? Would you use a beveled strip or would you apply a birdsmouth cut at the ridge? I think I've seen both details but what is the preferred method if there is one.

The problem is I'm not out in the field enough so I never get to see this stuff actually go together very often.
0
Nathaniel P. Wilkerson PE
Medeek Engineering Inc
design.medeek.com
User avatar
medeek 
PluginStore Author
PluginStore Author
 

Re: 3D Truss Models

Postby medeek » Sat Dec 12, 2015 6:44 am

When the plugin is loaded in a metric template it will now utilize a web dialog with metric sizes for glulam beams. The menu and glulam beam sizes are currently listed at the following link:

http://design.medeek.com/calculator/ske ... etric.html

I probably don't list every combination possible or manufactured in each respective country or jurisdiction but hopefully I list the most common sizes. So far I have entered in data for the United Kingdom (Great Britain), South Africa, and Australia (and New Zealand).

I can enter in more countries if provided the data (width, depth, locale name and ply thickness). Now that I have the web dialogs and html files setup it is not a big deal to add more entries.

When the plugin is loaded in inches or feet then the US sizes or AWC NDS tables are loaded. So far I have only found one country that still uses the old units.

http://design.medeek.com/calculator/ske ... lulam.html
0
Nathaniel P. Wilkerson PE
Medeek Engineering Inc
design.medeek.com
User avatar
medeek 
PluginStore Author
PluginStore Author
 

Re: 3D Truss Models

Postby medeek » Sun Dec 13, 2015 12:13 pm

Added dropped beam options for Gable Rafter Roof with Glulam Beam: Notched rafter and Bevelled plate.



0
Nathaniel P. Wilkerson PE
Medeek Engineering Inc
design.medeek.com
User avatar
medeek 
PluginStore Author
PluginStore Author
 

Re: 3D Truss Models

Postby medeek » Mon Dec 14, 2015 4:22 am

Version 1.2.0 - 12.13.2015
- Added ceiling joist option for Gable Rafter Roof.



Note: In the image shown I have raised the ceiling joist 24", the default is zero, or resting on the top plate of the wall.
1
Nathaniel P. Wilkerson PE
Medeek Engineering Inc
design.medeek.com
User avatar
medeek 
PluginStore Author
PluginStore Author
 

Re: 3D Truss Models

Postby medeek » Mon Dec 14, 2015 9:02 am

With regards to outlookers and I-joist roofs I also noticed in the TJ-4000 (Detail O) they only show the outlookers in a vertical orientation. Are we allowed to do a horizontal orientation (outlookers laid flat)? And if so how do we make that attachment?
0
Nathaniel P. Wilkerson PE
Medeek Engineering Inc
design.medeek.com
User avatar
medeek 
PluginStore Author
PluginStore Author
 

Re: 3D Truss Models

Postby medeek » Tue Dec 15, 2015 12:55 am

Various configurations of a cambered truss:

0
Nathaniel P. Wilkerson PE
Medeek Engineering Inc
design.medeek.com
User avatar
medeek 
PluginStore Author
PluginStore Author
 

Re: 3D Truss Models

Postby medeek » Thu Dec 17, 2015 1:43 am

Things have been a little slow on the plugin development and also on visits to my plugin page the last few days as I have been busy working on some local engineering projects and have not had the time to work on any new features.

Then all of sudden this morning I noticed things were going a little wild on the site with a ton of traffic. Turns out my plugin has somehow found its way to the top of the stack on Extension Warehouse:



Not sure how it ended up there but my server has registered a serious uptick in traffic.
0
Nathaniel P. Wilkerson PE
Medeek Engineering Inc
design.medeek.com
User avatar
medeek 
PluginStore Author
PluginStore Author
 

Re: 3D Truss Models

Postby medeek » Thu Dec 17, 2015 7:34 am

Version 1.2.1 - 12.16.2015
- Added gable end trusses (ladders) and ribbon boards to the floor truss type (Warren - System 42).
- Sheathing option enabled under advanced floor options for floor trusses.

0
Nathaniel P. Wilkerson PE
Medeek Engineering Inc
design.medeek.com
User avatar
medeek 
PluginStore Author
PluginStore Author
 

Re: 3D Truss Models

Postby medeek » Tue Dec 22, 2015 9:16 am

Version 1.2.2 - 12.21.2015
- Added TJI Rafter Roof with Glulam Beam (all advanced options enabled).
- Added dropped beam option for TJI Rafter Roof with Glulam Beam: Bevelled plate






Note, the birdsmouth cut at the lower bearing point. What I am not showing is the additional web blocking (stiffeners) required at this bearing point and at the ridge beam, see TJI-4000 for more details.
0
Nathaniel P. Wilkerson PE
Medeek Engineering Inc
design.medeek.com
User avatar
medeek 
PluginStore Author
PluginStore Author
 

Re: 3D Truss Models

Postby medeek » Wed Dec 23, 2015 11:48 pm

Version 1.2.2 - 12.23.2015
- Structural outlookers notched around TJI top flange when oriented vertically, as per TJI manufacturer's structural details.



The tails of the TJI joists at the overhangs is left untrimmed however it is very easy to trim the tail of the rafters as shown below to customize to your particular roof requirements.

2
Nathaniel P. Wilkerson PE
Medeek Engineering Inc
design.medeek.com
User avatar
medeek 
PluginStore Author
PluginStore Author
 

Re: 3D Truss Models

Postby medeek » Tue Dec 29, 2015 3:21 pm

Version 1.2.3 - 12.29.2015
- Added Hip Rafter Roof.



A square hip roof (pyramid):



I still need to add in the advanced options for this roof type (sheathing, fascia etc...) I'm also thinking about ceiling joists and how best to configure them. For low pitch hip roofs the ceiling joists near the hip ends will clash with the hip jack rafters unless they are oriented parallel to the jack rafters.
1
Nathaniel P. Wilkerson PE
Medeek Engineering Inc
design.medeek.com
User avatar
medeek 
PluginStore Author
PluginStore Author
 

Re: 3D Truss Models

Postby medeek » Wed Dec 30, 2015 5:03 am

A more complex hip roof combined with some trusses. Note I have not trimmed back all of the rafters in the top image.



I initially generated the hip roofs (two rectangles) and then deleted the appropriate members and trimmed the common rafters to create the valley jack rafters and cripple jack rafters. The valley rafter was created by copying an instance of one of the hip rafters and moving it into place. The end result is:



Overall the process has been simplified by having the hip roof feature in the plugin. Trimming the members is the most time consuming, perhaps a more efficient trim tool can be devised so that intersecting members can be easily trimmed back to clean up a complex roof. Ultimately it would be cool to have the plugin automatically handle even more complex roofs such as this but that would take some serious programming.

Also note that I used a raised heel for the trusses so that the heel height and gutter line of the trusses matches that of the rafters.
0
Nathaniel P. Wilkerson PE
Medeek Engineering Inc
design.medeek.com
User avatar
medeek 
PluginStore Author
PluginStore Author
 

Re: 3D Truss Models

Postby medeek » Thu Dec 31, 2015 2:54 am

On my Google+ page I posted some recent screenshots of the truss plugin output. One particular individual went on a rather long diatribe on the inferior nature of SketchUp as a design tool, I quote,

"Well, if you are obsessive compulsive, sketchup is your tool. But for people who like to get projects done, there are tools that know what wood is, what lumber is, and know what the construction code is and draw in the meaningless details for you... like framing and rafters.

SketchUp doesn't know what a solid is. Doesn't do edge detection. Doesn't know what physics is. Can't self simply. Doesn't understand physical continuity. Doesn't understand region of focus. Can't deal with camera and material intersection. SketchUp has one intuitive tool, the extrusion tool, and somehow left everything else to confusion."


Some of his arguments I might agree with but it seems like the design community is starting to embrace SketchUp, at least more than I had realized. What made you as a designer or DIY'er decide to use SketchUp versus other design software?
0
Nathaniel P. Wilkerson PE
Medeek Engineering Inc
design.medeek.com
User avatar
medeek 
PluginStore Author
PluginStore Author
 

Re: 3D Truss Models

Postby medeek » Thu Dec 31, 2015 3:54 am

Note the cripple or stub ceiling joists in this picture:

0
Nathaniel P. Wilkerson PE
Medeek Engineering Inc
design.medeek.com
User avatar
medeek 
PluginStore Author
PluginStore Author
 

Re: 3D Truss Models

Postby medeek » Thu Dec 31, 2015 5:02 am

Testing out the hip roof feature with some more complex roof lines:







The thing that jumps out at me right away is the ease with which I can generate the basic roof lines and most of the rafters. This particular roof required (4) rectangular roofs to generate all of the lines. The only thing that is missing is the valley rafters. To make this feature more functional for complex roofs I only need to have a tool that can generate valley rafters and trim back members to create the cripple rafters.
0
Nathaniel P. Wilkerson PE
Medeek Engineering Inc
design.medeek.com
User avatar
medeek 
PluginStore Author
PluginStore Author
 

Re: 3D Truss Models

Postby pbacot » Thu Dec 31, 2015 8:55 pm

medeek wrote:On my Google+ page I posted some recent screenshots of the truss plugin output. One particular individual went on a rather long diatribe on the inferior nature of SketchUp as a design tool, I quote,

"Well, if you are obsessive compulsive, sketchup is your tool. But for people who like to get projects done, there are tools that know what wood is, what lumber is, and know what the construction code is and draw in the meaningless details for you... like framing and rafters.

SketchUp doesn't know what a solid is. Doesn't do edge detection. Doesn't know what physics is. Can't self simply. Doesn't understand physical continuity. Doesn't understand region of focus. Can't deal with camera and material intersection. SketchUp has one intuitive tool, the extrusion tool, and somehow left everything else to confusion."


Some of his arguments I might agree with but it seems like the design community is starting to embrace SketchUp, at least more than I had realized. What made you as a designer or DIY'er decide to use SketchUp versus other design software?


I think the design community has already embraced SketchUp as one tool to use. But one question to your questioner, WHAT tools is he/she referring to? and why the "diatribe" (who cares?).

I guess that's TWO questions.

The answer to your question, for me, may verify your questioner's suspicions. SketchUp is relatively cheap and easy to learn, and came along when other apps I was using failed. I did not review a lot of softwares and it satisfied what I needed at the time.
For what you are doing here, it may very well be a good idea for you to look at real BIM.
0
Last edited by pbacot on Fri Jan 08, 2016 5:16 pm, edited 1 time in total.
MacOSX Mojave ShetchUp Pro v19 Twilight Pro v2 M2 Kerkythea PowerCADD
User avatar
pbacot 
Top SketchUcator
 

Re: 3D Truss Models

Postby driven » Thu Dec 31, 2015 9:32 pm

medeek wrote:What made you as a designer or DIY'er decide to use SketchUp versus other design software?


I have a vivid memory of the first time I used SU back in 2003...

Suddenly, I felt like I was out in the yard, working on the lawn under blue a sky, with the sun shining...

This simple environment was so removed from any other 'cad' dungeon I had attempted to use that it got me hooked...

then, I discovered 'FollowMe' and soon after plugins...

I went off SU during the early Google era, but was drawn back by the Fredo, Tig, Kirell, Morrisdov and other plugins of the time...

happy new year

john
0
learn from the mistakes of others, you may not live long enough to make them all yourself...

driven 
PluginStore Author
PluginStore Author
 

Re: 3D Truss Models

Postby medeek » Fri Jan 01, 2016 12:37 am

I worked in the Aerospace industry for about 6 years prior to changing my focus to residential design and structural engineering. I had the unfortunate opportunity of having to use CATIA. This 3D design program feels like a dinosaur compared to anything I have ever used, and hopefully I never have to use it again. I also worked a lot with Solidworks, which I find a lot more modern and much more fun to use. I have created complete 3D residential designs using Solidworks that are fully parametric:

http://design.medeek.com/plans/planset. ... tion2=null

The big problem I had with Solidworks is the 2D drawing generation required a number of details added to the drawing sheets manually. Solidworks is very slow and heavy with manual sketches so I ended up reverting to AutoCAD which can handle very complex 2D drawings without so much as a flicker.

Lately, I have moved completely away from Solidworks as a design tool because of the time it takes to generate models and also AutoCAD is where I end up when it comes generating the drawing set. However, a 3D model is always nice to have for ISO views and other reasons. I've briefly played with Chief Architect as a Solidworks replacement but I find it too limiting and I was not overly impressed.

The one thing I really like about SketchUp is I can pass the model on to the client and they can quickly download and install the program (lightweight) and be up and running almost instantly. I wish the software had a few more tools built in like a mirror function etc... but overall it is a pretty good package especially when you consider that you can just download it for free and most plugins are relatively inexpensive.

The big architectural firms typically use products like Revit, but the casual user and smaller design firms don't have that amount of budget to dump into software.
0
Nathaniel P. Wilkerson PE
Medeek Engineering Inc
design.medeek.com
User avatar
medeek 
PluginStore Author
PluginStore Author
 

Re: 3D Truss Models

Postby pbacot » Fri Jan 01, 2016 12:42 am

That Solidworks house model is cool. I always just thought of SolidWorks for mechanical, industrial, and product design.
0
MacOSX Mojave ShetchUp Pro v19 Twilight Pro v2 M2 Kerkythea PowerCADD
User avatar
pbacot 
Top SketchUcator
 

Re: 3D Truss Models

Postby medeek » Sat Jan 02, 2016 8:51 pm

This is unrelated to the functionality of the plugin but I managed after two days of pulling my hair out to somehow get the PayPal Express Checkout to work on the site. A number of clients had been requesting the PayPal option rather than use their credit cards over the internet.
0
Nathaniel P. Wilkerson PE
Medeek Engineering Inc
design.medeek.com
User avatar
medeek 
PluginStore Author
PluginStore Author
 

Re: 3D Truss Models

Postby medeek » Tue Jan 05, 2016 6:58 am

Looking at cantilevered trusses tonight. The use of a wedge, slider or strut depends on the amount of the overhang and in some cases if the overhang (cantilever) is within the scarf cut of the top chord no additional member is required, see image below:



Notice how the web strut is centered over the point of bearing with the long cantilever. Also notice that the panel point placement of this fink truss was not altered with the addition of the cantilever.

Basically this will be a new truss family and I'll start with the fink truss and take it from there. If anyone has shop drawing from truss plants they are willing to share that show different configurations of a cantilever truss, that would be very helpful.
1
Nathaniel P. Wilkerson PE
Medeek Engineering Inc
design.medeek.com
User avatar
medeek 
PluginStore Author
PluginStore Author
 

Re: 3D Truss Models

Postby medeek » Fri Jan 08, 2016 11:58 am

Version 1.2.4 - 01.08.2016
- Plugin integrated with the Medeek Truss Designer.
- Engineering of common fink truss enabled.



When a new truss is created (common truss types only for now) the parameters are specified within the dynamic component attribute library. Opening the component options allows one to change some of these values.

The new engineering icon
allows one to automatically transfer all of the truss design parameters directly from SketchUp to the Truss Designer for engineering checks.
1
Nathaniel P. Wilkerson PE
Medeek Engineering Inc
design.medeek.com
User avatar
medeek 
PluginStore Author
PluginStore Author
 

Re: 3D Truss Models

Postby juju » Fri Jan 08, 2016 12:52 pm

The development of the plugin has come a long way in a short period of time, thanks for the dedication!
1
Save the Earth, it's the only planet with chocolate.
User avatar
juju 
Premium Member
Premium Member
 

Re: 3D Truss Models

Postby medeek » Sat Jan 09, 2016 12:30 am

The current Medeek Truss Plugin menu now has 5 icons:



The available items are the following:

1.) Draw Roof Truss:
- Common
- Attic
- Monopitch
- Scissor

2.) Draw Floor Truss:
- Floor Truss
- TJI Joist

3.) Draw Truss Set:
- Valley Set

4.) Draw Roof Rafters:
- Gable Roof
- Gable Roof w/ GLB
- TJI Roof w/ GLB
- Hip Roof

5.) Engineering Calculations:
- Truss (common truss types only)

Note that the menus show additional items that are either being worked on or are planned for future releases.
1
Nathaniel P. Wilkerson PE
Medeek Engineering Inc
design.medeek.com
User avatar
medeek 
PluginStore Author
PluginStore Author
 

SketchUcation One-Liner Adverts

by Ad Machine » 5 minutes ago



Ad Machine 
Robot
 

PreviousNext


 

Return to Plugins

Who is online

Users browsing this forum: kramkram, Lkjh, nezpia, nicknoxx, sekopasa, tunglamdo263 and 9 guests

Visit our sponsors: