I've had a number of people asking about adding in the connector plates for the trusses.  After giving this some thought it doesn't seem like too much work to implement.  I will try and work on this today and this evening.

I've already added in the option into the global settings:



Plate thickness can be set by the user (inches or mm).  The default will be 0.0575 inches (1.46 mm) which is the total thickness of a typical Mitek M-16 connector plate:

http://www.icc-es.org/reports/pdf_files/ESR-1311.pdf

If I could find some additional help for programming that would be useful right now.  I've come to the realization that I cannot realistically program all of the stuff I have planned.  I really need to expand this beyond a one man show.

I've really only been working on the truss plugin for about a year now and there is a lot more to be done as well as two more plugins that I am hoping to get started on into the new year:

Medeek Structural Plugin



Medeek Wall Plugin



The structural plugin will deal less with the actual framing geometry and more specifically with the lateral and vertical engineering of the structure.  It will be geared toward other structural engineers with the intent to automate residential structural engineering as much as possible.

Lateral:
Wood Shear Walls (segmented and perforated), Diaphragms (roof)
Vertical:
Beams, Headers, Joists, Rafters, Footings, Posts, I-Joists,
Uplift:
Rafters, Trusses

What will make this the killer app is that the 3D model will be able to automatically propagate the loads down through the structure while at the same time allowing the user to create the structure's geometry in an intuitive and friendly 3D environment - SketchUp.

Of course the real power of such a plugin only becomes apparent when you create a model and then decide to build that same house or structure in a different location with different site criteria.  Rather than having to start from scratch you simply enter in the new wind speed, ground snow load, and seismic design criteria into the model and the plugin recalculates the entire structure and then alerts you on any members that are undersized or over stressed.  This would be particularly beneficial to homebuilders who have a set number of model homes they use but build in various locations.

Version 1.7.0 - 12.04.2016
- Added a "Layers" tab within the global settings; roof, wall and floor components can be assigned to specific layers.
- Enabled custom layers for the common fink truss.

Note that I have only enabled custom layers for one type of common truss (fink).  To enable custom layers for all other truss types, rafter roofs and other misc. items will take a few hours of going through each module of the plugin and adding in the "layers" code or conditional statements.  My arm/neck is not holding up very well but I thought it would be nice to at least get this out there for the most common truss type for testing purposes and feedback.

Version 1.0.6 - 12.03.2016
- Added a "Layers" tab within the global settings.
- Enabled custom layers for both stemwall and slab on grade foundations.

I haven't fully committed yet to coding all of my engineering calculators within the SketchUp API, but I am heading that direction as I further contemplate my next Sketchup Plugin: Medeek Structural Plugin.

The largest obstacle is the ability to generate MS Excel files and PDF documents (reports). For this to really work I need a way to have my plugin's calculations export their data into nicely formatted spreadsheets and/or PDF reports. I have no idea where to even start and don't even know if this sort of thing is remotely possible with SketchUp, the API or Ruby, I'm assuming it is because I am sure other people have run into this same sort of thing as me.

Any assistance or direction in this regard would be greatly appreciated.

Ultimately, I am hoping to create a structural plugin that will allow an engineer to do all of the lateral and vertical calcs for a typical residential or light commercial wood structure. The reason for using SketchUp for this sort of thing is the ability to leverage SketchUp's intuitive drawing interface to create all of the building primitives/elements and provide an easy to use method for viewing and inputting building geometry and other design criteria.

I've actually had the idea to create this type of program since about 3 years ago but the show stopper was always the graphical interface and 3D component of it. Not until I began tinkering with the API about a year ago and waded into a full blown plugin development (truss plugin) did I realize the potential available within SketchUp. SketchUp and its API solves the 3D interface hurdle magnificently and now I am hopefully on course to create the one piece of software that will be the apex of my engineering career and hopefully further automate and advance the field of residential structural engineering.

I've been thinking about adding in a retaining wall feature that auto sizes the rebar and qty. based on my typical retaining wall details:



For stemwall foundations I typically check the footing width (bearing pressure) and min. rebar for shrink (ACI 318-11), see engineering calcs per this PDF:

http://design.medeek.com/resources/footing/STEMWALL_FOOTING_CALCULATOR.pdf

I could easily incorporate this type of engineering calculations into the plugin, however I'm still trying to figure out how to have the plugin output PDF reports, or Excel spreadsheets, which would be necessary if engineering reports become part of this plugin.

Same sort of thing with square or rectangular footings can be done:

http://design.medeek.com/resources/footing/SQUAREFOOTING_CALCULATOR.pdf

With stemwalls or pony walls (not necessarily retaining walls) that exceed 24" in height (but not in excess of 48") I like to add #4 bars cont. horizontal at 18" o/c.  Logic could be incorporated that adds in additional stemwall and foundation wall rebar per a number of prescriptive criteria, IRC tables etc...

Currently it is entirely up to the users to specify rebar size and qty. with both stemwall and slab on grade foundations.

Stemwall foundations allow you to place rebar at the top of the wall  (5" below top, qty. 1,2, or 3 bars) and rebar at the bottom of the wall (3" above bottom, qty, 1,2, or 3 bars).  It also allows placement of bar in perimeter footing and interior footings (qty 1,2 or 3 bars).  Bar sizes range from #3 to #8 and similar sized metric equivalents for the metric templates, I can always add more sizes if requested.

Version 1.0.5 - 12.01.2016
- Enabled reinforcement for stemwall foundations.



View model here:

https://3dwarehouse.sketchup.com/model.html?id=ef2187c3-eec9-487f-ae38-601f128390f1

Version 1.0.4 - 11.27.2016
- Enabled rebar and mesh reinforcement for slab on grade foundations.

I've repackaged the .rbz file this morning so that when it installs into SU 2017 the extension will have the appropriate hash file and appear as "signed".  I have not yet rolled the revision (1.7.0) which includes the updates for stepdown hip truss sets, there is still substantial work before I am ready to release that module and version.

I've recently uploaded my latest volume of residential structural details to the CAD Library. 

This is an example of the wireframe (temporary) graphic that is shown while creating a valley set.

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.

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.

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 too loudly about any of the configurations so I think it is now time to proceed and add the hip sets into the plugin.

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.