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    Foundation Plugin

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    • pbacotP Offline
      pbacot
      last edited by

      You asked about the piers. A common design is 16"-24" square piers with top at grade. with a smaller block eg. 8x8 to raise the post above grade. the girders are often 4x6 so the spacing is about 6'-7' o.c. Larger spans mean larger beams & pads. And of course soils, as you mention may mean larger pads. I notice on your grade beam design the posts are sitting on top of the grade beam with no blocks or pedestals. The way you've drawn it, this would also be the subgrade height and posts are generally raised above the subgrade, even if they are pressure treated.

      I wonder how many contractors actually do monolithic garage slabs as opposed to T-footings and "floating" slabs? They're both used in California.

      MacOSX MojaveSketchUp Pro v19 Twilight v2 Thea v3 PowerCADD

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      • pbacotP Offline
        pbacot
        last edited by

        @medeek said:

        One question I've had is how much should the stemwall overshoot the step in the footing before stepping down itself? I've seen different ratios used (ie. rise/run) but I'm trying to find a consensus on what is common practice.

        Good question but I'd pose it the other way around. The top of the stemwall is based on grade and building design, then the footing step would be placed accordingly.

        MacOSX MojaveSketchUp Pro v19 Twilight v2 Thea v3 PowerCADD

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        • medeekM Offline
          medeek
          last edited by

          With regards to Posts and their footings I usually see this sort of configuraton:

          Post, pedestal and square footing

          POST_EXAMPLE.jpg

          I will make the post, pedestal, reinforcement and post base bracket optional. The actual footing will not be optional.

          I would like to use pre-drawn post base components (ie. Simpson Strong-Tie) but I have to figure out how to import those into the model with the API

          Nathaniel P. Wilkerson PE
          Medeek Engineering Inc
          design.medeek.com

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          • pbacotP Offline
            pbacot
            last edited by

            That looks good, but for a round pedestal they usually leave the Sonotube on. 😉

            MacOSX MojaveSketchUp Pro v19 Twilight v2 Thea v3 PowerCADD

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            • G Offline
              Garry K
              last edited by

              You should be consistent with your post.skp files
              Probably have the center at the bottom of the post sitting on the ORIGIN

              
              def get_post_def(post_name)
                model = Sketchup.active_model()
                definitions = model.definitions
              
                definitions.each{ |my_def| return my_def if (my_def.name == post_name && my_def.valid?)}
              
                filename = File.join(path_to_your_plugin, "posts", "#{post_name}.skp")
              
                definitions.load(filename)
              end
              
              

              Then you need to place the post

              
              # get the post definition
              post_def = get_post_def(post_name)
              
              # where pt is where you want to place it
              tr = Geom;;Transformation.new(pt)
              
              instance = group.entities.add_instance(post_def, tr)
              
              
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              • medeekM Offline
                medeek
                last edited by

                Version 1.0.5 - 12.01.2016

                • Enabled reinforcement for stemwall foundations.

                http://design.medeek.com/resources/images/foundation_su14_800.jpg

                View model here:

                Link Preview Image
                3D Warehouse

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

                favicon

                (3dwarehouse.sketchup.com)

                Nathaniel P. Wilkerson PE
                Medeek Engineering Inc
                design.medeek.com

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                • medeekM Offline
                  medeek
                  last edited by

                  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:

                  http://res.cloudinary.com/engineering-com/image/upload/v1470879435/tips/RETAINING_WALL_DETAILS_loycxe.jpg

                  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.

                  Nathaniel P. Wilkerson PE
                  Medeek Engineering Inc
                  design.medeek.com

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                  • pbacotP Offline
                    pbacot
                    last edited by

                    Nice. I hope the number of sides on the rebar and bends is not so large as to slow down SU! Might be helpful to have on a separate component and layer.

                    MacOSX MojaveSketchUp Pro v19 Twilight v2 Thea v3 PowerCADD

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                    • medeekM Offline
                      medeek
                      last edited by

                      Some good points pbacot:

                      1.) I currently have the number of sides on the bends set at default value but I can easily change this to a lesser value if its determined that the file size or speed of SketchUp is becoming impacted.

                      2.) Layers is something I have been meaning to add into both plugins, or at least the option for layers. It would be nice to have a separate rebar layer.

                      3.) Currently the rebar is not grouped in any special grouping or component except for the rebar inside of interior stemwall strip footings. For those footings I have setup a component that encompassses the footing, rebar and any post/beam or studwall framing. The reason for this is the ability to copy and paste additional interior footings based on the original one. I could group all of the other rebar and mesh into its own group or component if this seems like a good idea.

                      Nathaniel P. Wilkerson PE
                      Medeek Engineering Inc
                      design.medeek.com

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                      • medeekM Offline
                        medeek
                        last edited by

                        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.

                        http://design.medeek.com/resources/images/foundation_su16_800.jpg

                        Nathaniel P. Wilkerson PE
                        Medeek Engineering Inc
                        design.medeek.com

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                        • jujuJ Offline
                          juju
                          last edited by

                          When will this plugin receive some love? Regular floor slabs not yet activated?

                          Save the Earth, it's the only planet with chocolate.

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                          • JQLJ Offline
                            JQL
                            last edited by

                            This is yet another cool plugin. Will it evolve to a slab plugin?

                            I just start wishing more engineers would use sketchup...

                            www.casca.pt
                            Visit us on facebook!

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                            • medeekM Offline
                              medeek
                              last edited by

                              Floor slabs shouldn't be too hard to add, just a rectangle with some reinforcement (mesh or bar). I would also like to have the ability to have polygon shapes so the user can input in any shape. Another item to consider is integrated interior footings.

                              Let me know if you have any additional features you would like to see with floor slabs.

                              Nathaniel P. Wilkerson PE
                              Medeek Engineering Inc
                              design.medeek.com

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                              • N Offline
                                nujak66
                                last edited by

                                Looking good Nathaniel! I'm just waiting for polygon shapes for the foundations in your plugin. 😄

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                                • medeekM Offline
                                  medeek
                                  last edited by

                                  I've been working on the polygon slab-on-grade this weekend and by extension the polygon stemwall foundation as well. The interactive "tool" portion has been difficult mostly because I don't understand a lot of that portion of the code (blackbox to me), but I'm almost there with it.

                                  I would like to be able to create a foundation with any shape or size simply by drawing a polygon, point by point.

                                  A simple example would be something like this:

                                  http://design.medeek.com/resources/images/foundation_su17_800.jpg

                                  Note, the interior floor beams at 12' on center. Using an Web dialog I should be able to allow the user to easily add in as many floor beams or bearing walls as required.

                                  Once I have the foundation working correctly then I need to extend the floor truss/ floor joist module so that it can also handle polygon shaped structures within the Truss Plugin, then we will have a full package.

                                  View model here:

                                  Link Preview Image
                                  3D Warehouse

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

                                  favicon

                                  (3dwarehouse.sketchup.com)

                                  Nathaniel P. Wilkerson PE
                                  Medeek Engineering Inc
                                  design.medeek.com

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                                  • medeekM Offline
                                    medeek
                                    last edited by

                                    Has anyone ever seen a stemwall framed liked this?

                                    https://cdn-enterprise.discourse.org/sketchup/uploads/default/optimized/3X/c/5/c507ba2896ec8f7123f126721ffc27db814f2e63_1_519x500.jpg

                                    Nathaniel P. Wilkerson PE
                                    Medeek Engineering Inc
                                    design.medeek.com

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                                    • facerF Offline
                                      facer
                                      last edited by

                                      Medeek,
                                      I have placed your stem wall question in ChiefTalk which is
                                      frequented by several active builders - designers in North America

                                      ChiefTalk reference:
                                      https://chieftalk.chiefarchitect.com/topic/13289-stem-wall-detail-question-of-construction/

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                                      • medeekM Offline
                                        medeek
                                        last edited by

                                        Another technique I've had a recent request on is to create slots in the stemwall that the joists sit down inside. This method dropping the joists down, even with the sill plate, seem to be fairly common in Oregon.

                                        Nathaniel P. Wilkerson PE
                                        Medeek Engineering Inc
                                        design.medeek.com

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                                        • medeekM Offline
                                          medeek
                                          last edited by

                                          Or like this?

                                          http://design.medeek.com/resources/images/foundation_su18_800.jpg

                                          These two methods seem to be fairly popular in Oregon, I've never seen a floor/stemwall constructed this way any where else.

                                          http://design.medeek.com/resources/images/foundation_su19_800.jpg

                                          Nathaniel P. Wilkerson PE
                                          Medeek Engineering Inc
                                          design.medeek.com

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                                          • pbacotP Offline
                                            pbacot
                                            last edited by

                                            Looks like a lot of extra work. Why not just drop a single ledge for the joists? We do that sometimes in California. Put a pressure treated plate on a lower ledge. Also each joist needs some sort of anchoring to (but also separation from) concrete. There would be blocking, unless they use the concrete somehow.

                                            MacOSX MojaveSketchUp Pro v19 Twilight v2 Thea v3 PowerCADD

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