3D Truss Models

medeek · 31 Jan 2016, 01:31

Dutch Gable Rev. 3:

Doubled up gable common rafters with the dutch ridge/ledger is sandwiched between them. Found a paper by Larry Haun, Mar. 1995 "Framing a Dutch Roof" that was published in Fine Homebuilding magazine, that describes a very similar method of framing.

View model here:

3D Warehouse

3D Warehouse is a website of searchable, pre-made 3D models that works seamlessly with SketchUp.

(3dwarehouse.sketchup.com)

Disregard the common rafter sizes they are undersized but look at the method of sandwiching the dutch ridge/ledger between the last common rafters. I would probably also install some blocking between the double gable common rafters. I'm also not showing all of the ceiling joists and bird blocking etc...

If the roof gets large enough then one could go to a double ply dutch ridge, or even a deeper LVL member, assuming there is no internal support available from internal walls.

I think I'm now ready to add the dutch gable roof into the plugin.

pbacot · 31 Jan 2016, 02:05

That looks like a nice way to do it!

medeek · 31 Jan 2016, 03:27

There is more than one way to skin a cat with this stuff but if I'm going to put something out there I want it to conform as best as possible to current construction methods. Some of these details may be above and beyond what is required but this is the stuff that keeps me up a night.

medeek · 31 Jan 2016, 05:30

I've also realized that for hip roofs I need an option to set the depth of the hip rafters since they are often larger members than the common or jack rafters.

Here is the new icon for secondary roofs:

This category will contain the following items:

Gable Roof Minor
Hip Roof Minor
Dutch Gable Roof Minor
Gable Dormer
Hip Dormer
Shed Dormer

medeek · 2 Feb 2016, 09:24

Version 1.2.8 - 02.02.2015

Added Shed Rafter Roof with Ledger (all advanced options enabled).
Added ceiling joist option for Shed Rafter Roofs.
New submenu item and toolbar icon added for secondary (minor) roofs.

View model here:

3D Warehouse

3D Warehouse is a website of searchable, pre-made 3D models that works seamlessly with SketchUp.

(3dwarehouse.sketchup.com)

I used this option to create a monitor style roof line but it can also be used for porch roofs, carports etc... I still need to add a standard shed roof with and upper and lower birdsmouth cut.

Also note that with both gable and shed roofs the ceiling joist option is available, with the option to raise them above the top plate. In this model the shed roof ceiling joists are raised 6 inches.

medeek · 2 Feb 2016, 23:14

I've created a listing in the SketchUcation PluginStore:

SketchUp Plugins | PluginStore | SketchUcation

SketchUp Plugin and Extension Store by SketchUcation provides free downloads of hundreds of SketchUp extensions and plugins

(sketchucation.com)

pbacot · 3 Feb 2016, 00:08

Looks nice!

medeek · 3 Feb 2016, 00:37

More "Fun with Roofs".

This roof was generated by first creating a hip roof primitive then deleting all but 3 components which were then copied and rotated into place for the lower roof hip corner. The shed roof /w ledger component was created with one primitive and then copied and rotated into place. Overall a fairly painless process now that I am somewhat familiar with navigating my way around SketchUp. The fascia required a couple of trims.

The pyramid at the top required no manual intervention. Approximately 10-15 minutes of work for a fairly substantial roof.

View model here:

3D Warehouse

3D Warehouse is a website of searchable, pre-made 3D models that works seamlessly with SketchUp.

(3dwarehouse.sketchup.com)

medeek · 4 Feb 2016, 04:02

Testing the real world application of the Medeek Truss Plugin. This model combines a double fink truss, raised heel fink truss, monopitch truss and shed roof with ledger. While creating the shed roof special attention to the birdsmouth cut was required to ensure that the fascia height of the rafters and trusses lined up. Also note the use of the raised heel type truss on the upper roof portion. Structural outlookers were specified for all gable overhangs.

5:12 pitch roofs with rafters and trusses 24" o/c. I did not apply a level cut to the rafter overhangs but that would probably be a given. Span of the double fink is 48 feet with 2x6 top and bottom chords.

View models here:

3D Warehouse

3D Warehouse is a website of searchable, pre-made 3D models that works seamlessly with SketchUp.

(3dwarehouse.sketchup.com)

3D Warehouse

3D Warehouse is a website of searchable, pre-made 3D models that works seamlessly with SketchUp.

(3dwarehouse.sketchup.com)

If anyone has some real world applications using the plugin that they are willing to share I would be very interested to see how it is being used and it would also give me some direction for further development and improvements.

pilou · 4 Feb 2016, 10:11

What a plugin!

Sorry for the diversion!

medeek · 4 Feb 2016, 17:33

I've ran into this structural question before, where you have a stairway next to an exterior wall. My first thought is to call out a balloon framed wall up to the 2nd story top plate(s) but then that makes the rim board and double top plate of the first story discontinuous. What is the preferred solution or how have you seen this done in similar circumstances.

Here is a quick mock up in SketchUp to better explain what the two options are:

You can also view and download the 3D SketchUp model here:

3D Warehouse

3D Warehouse is a website of searchable, pre-made 3D models that works seamlessly with SketchUp.

(3dwarehouse.sketchup.com)

juju · 5 Feb 2016, 11:42

Hi Nathaniel,

I noticed that Extension Warehouse has two links for your plugin, the one should be removed, not so?

SketchUp Extension Warehouse

Your library of custom third-party extensions created to optimize your SketchUp workflow.

(extensions.sketchup.com)

SketchUp Extension Warehouse

Your library of custom third-party extensions created to optimize your SketchUp workflow.

(extensions.sketchup.com)

medeek · 5 Feb 2016, 16:35

For some reason there are two copies on Extension Warehouse, you're right. I'm looking into it.

medeek · 5 Feb 2016, 19:26

Example of a porch roof using the hip roof and shed roof primitives. I'm wondering if it might not be worthwhile to add in a feature to create this type of combination roof automatically. Shed Roof w/ ledger & hip ends.

View updated model here:

3D Warehouse

3D Warehouse is a website of searchable, pre-made 3D models that works seamlessly with SketchUp.

(3dwarehouse.sketchup.com)

pbacot · 5 Feb 2016, 23:10

Both shed and hip add-on roofs would be useful, porches and partial 2-story structures.

medeek · 7 Feb 2016, 23:36

medeek · 8 Feb 2016, 08:00

Started the manual as a MS Word document however that doesn't work so well for hyperlinks. Starting over with an html manual page:

Medeek Design Inc. - Medeek Truss Plugin Manual

(design.medeek.com)

Medeek Design Inc. - Common Trusses

(design.medeek.com)

Couple of pages up, only about 25 more to go...

medeek · 13 Feb 2016, 06:59

Version 1.2.9 - 02.12.2015

Added Shed Rafter Roof (all advanced options enabled).
Added ceiling joist option for Shed Rafter Roofs.
Initial menu now defaults to last picked option of session for that sub-menu item.

A typical application might be a clerestory roof with a upper shed roof and lower shed roof with a ledger board:

View model here:

3D Warehouse

3D Warehouse is a website of searchable, pre-made 3D models that works seamlessly with SketchUp.

(3dwarehouse.sketchup.com)

medeek · 14 Feb 2016, 14:20

Version 1.3.0 - 02.14.2016

Added tail bearing truss type, configurations: (Fink).
Metric input enabled for tail bearing truss type.
Advanced options enabled for tail bearing truss type.

View model here:

3D Warehouse

3D Warehouse is a website of searchable, pre-made 3D models that works seamlessly with SketchUp.

(3dwarehouse.sketchup.com)

I have shown 3 configurations of the same roof to display the differences with non-structural vs. structural outlookers (horz. & vert.). I am not exactly sure how to treat the gable end truss for this truss type since I have never dealt with this type of truss before. Specifically, where structural outlookers are employed. Any sample outputs showing the gable end truss with a dropped top chord for a tail bearing truss would be very helpful.

Theoretically, one could forego the gable end trusses altogether and just balloon frame up to the roof diaphragm but I would like to provide the option for gable end trusses if it is a typical method used in real construction of this type of roof.

medeek · 14 Feb 2016, 23:55

I am currently investigating the best method to construct the gable end wall and truss with a tail bearing truss. Show below are 3 different possible configurations:

1.) Structural Outlookers (Vertical)

2.) Non-Structural Outlookers (Horizontal)

3.) Structural Outlookers (Horizontal)

This is just one possible method of framing the gable end wall into the gable truss with a 2x4 outlooker. Option 3 shown above is somewhat of a question, not sure how that heel joint would come together.

View the model here to analyze the different configurations:

3D Warehouse

3D Warehouse is a website of searchable, pre-made 3D models that works seamlessly with SketchUp.

(3dwarehouse.sketchup.com)