**Fun with Roofs - Episode 1**

My 9 year old son took one look at this roof and then said "Don't build this in Florida, you'll create a sink hole".











View model here:

https://3dwarehouse.sketchup.com/model/2032fed3-cb9b-40c4-80b1-be1009b3f022/Residence-8

Version 1.8.8 - 04.28.2017
- Added energy/raised heels for mod fan truss (3 variant: wedge, slider and vertical w/ strut).
- Metal plate connectors now enabled for mod fan trusses.

The trim tool in the Truss Plugin comes in quite handy when dealing with more complex foundation geometry:



For this foundation I used the stemwall (rectangle and polygon) function and the slab (polygon) function.  I had to trim the garage stemwall and also manually create the smaller interior post/beam assemblies.  I also adjusted the position of some of anchor bolts once I cut the doors into the garage stemwall.

View model here:

https://3dwarehouse.sketchup.com/model/4ed9f28d-11e4-4166-b698-b3cd734cd2a1/Foundation-7

Throwing a roof onto this foundation is fairly straightforward:



View model here:

https://3dwarehouse.sketchup.com/model/7d17b0c7-8cfb-461b-a4a6-127fafe0ece6/Residence-7

Using the rectangular floor primitives I was able to manually create the floor on the previous foundation in about 30 minutes:



If I create the polygon floor tool I will be able to accomplish the same thing in under 10 seconds.  The polygon floor tool in the truss plugin is next...

Version 1.1.1 - 04.23.2017
- Added polygon outline tool for stemwall foundation.
- Enabled perimeter rebar, anchor bolts, vents, and internal footings for (polygon) stemwall foundations.





View model here:

https://3dwarehouse.sketchup.com/model/d8dec962-1fb4-4637-adcd-7406fef4e9df/Stemwall-Foundation-POLYGON

The next improvement would be a web_diaolog input so that more than one internal footing can be specified at a time.

Then of course to further complicate matters there is the double bobtail truss which is really nothing more than a raised heel truss with unequal heel heights



So rather than add in a completely new category of trusses I suppose I could just allow the user to specify a heel height for both the left and right side of the common truss.  Currently the first menu has the option for a raised heel which is then applied to both sides of the truss.  I think I could just update to be:

Raised Heel Left: YES/NO "Defaults to NO"
Height Height Left (in.): "Defaults to 12" if no user entry"
Raised Heel Right: YES/NO "Defaults to NO"
Heel Height Right (in.):  "Defaults to SAME AS LEFT"

Recently I've had a couple requests for bobtail/stub end trusses.



When specifying how to truncate the truss, what lengths are typically used to control the location of the stub end(s)?

1.)  Stub or heel height.
2.)  Nominal span minus stub length

Version 1.1.0 - 04.14.2017
- Added polygon outline tool for slab-on-grade and slab.
- Enabled perimeter rebar, anchor bolts, and slab reinforcement for (polygon) slab-on-grade foundations.
- Enabled slab reinforcement for (polygon) slabs.

I haven't fully compiled a TODO List for this plugin yet but there are still a number of items that need to be addressed.

- A hole cutting tool that removes the concrete and the rebar and any anchor bolts in the way.
- Square and Rectangular Footings for point loads
- Strip Footings
- A line tool for the stemwall module
- Retaining Walls with Engineering
- Ability to step foundation walls
- Webdialog input for SOG and Stemwall so that interior footings can be configured with ease.

Let me know if there is anything you would like to add to this list.

I think I've got the slab reinforcement working now.  I haven't tested it enough to determine if its really robust enough to release another update but I'll keep testing.



I owe Sdmitch big time for this one.  I've integrated his rebar trim function into the plugin to create a new module that trims the slab rebar or mesh.  I am still trying to figure out exactly how the magic is done but most of it is over my head.

View model here:

https://3dwarehouse.sketchup.com/model/7d64c1ab-bb1a-47a2-9fb4-4cf3553e7cec/Foundation-4

A mesh reinforced slab though can get quite heavy with the polygon count so it may only have limited usefulness.

The polygon tool for the slab-on-grade foundations is nearing completion.  I've got the concrete, perimeter rebar, internal footings and even anchor bolts all working.



The only item still pending is the slab reinforcement (mesh/bar).  I've been contemplating devising my own boolean subtraction tool.

I've even managed to create a fillet tool based on TIG's 2D tools that properly applies the correct bend radius to the perimeter rebar.

Any shape is possible even a circular shape by selecting points along an arc.  Now I really need to get the wall plugin going with the same polygon tool that is smart enough to handle typical 90 deg. corners and non-orthogonal corners.



Curved walls and roofs though are still a bit of stretch, but I can see we need to eventually go that direction as well to make everything complete.

The slab on grade concrete is working great, that was easy.  Now I just need to work on the rebar in the perimeter footing and the anchor bolts as well as the optional garage curb.

Haven't figured out the best way to deal with the slab reinforcement yet but I've moved on to start putting together the polygon tool for the Slab-on-Grade.  Since the offset line tool is not exposed in the API I've decided to try and use TIG's SmartOffset plugin as a starting point.  Unlike the rectangle tool I probably won't have a bend radius on the footing bars, at least not initially.  At some point I would like to figure out a plugin or some code that will automatically apply a radius or fillet to two lines/edges, I'm surprised that this functionality is not already built into SketchUp.

The way I will create the SOG is extrude the slab and then use the follow me tool for the footing, then union the two solids together, fairly simple.  Any shape or size of SOG will be possible.  The basic input (Non-Graphical User Interface) will only allow the entry of one internal footing however I am planning on implementing a Webdialog GUI that will allow the user to create as many interior footings as required and also allow them to even cross each other in grid patterns (ie. X-dir and Y-dir).  Things are going to get interesting with this plugin.

The GUI will allow the user to better preview the location and start and end points of the interior footing(s) which will make the entire process much more intuitive and easier to use.

Anchor bolts along the perimeter of the SOG will also be implemented.  Hoping to have all of this done by the end of the week, and as time allows.  I may have to simply disable the slab mesh/rebar until I can figure out a way to trim it without forcing the user to SketchUp Pro.

As can be seen in this polygon shape the rebar could be potentially cut in multiple places.  The subtraction method makes the most sense but since I don't have that luxury I am working on a different algorithm for putting the rebar only within the concrete and so that it has at least 3" of ground clearance on the sides.