Stem Wall

Home Up Ceiling Coffer Knee Brace Stem Wall


Foundations For Home Building, Continuous Stem Wall . . . unusual

CAD detail drawing in plan view and section drawing in elevation


As you may recall, the Spahaus is a home spa enclosure of considerable size - nearly 600 square feet.  Its spa home design is highlighted in three other places on this website.

Builder Home Drawing

Plans & Elevations, Foundation

Plans & Elevations, Frame.

Schematics, Plumbing (Roughed)


MODEL HOME DRAWING, Home Design, Spa Enclosure

Here come the house plans details to the Spahaus new foundation in some detail, complimenting the more overall work covered in Plans & Elevations, Foundation.  Of themselves, this home drawing exemplifies the kinds of detailed treatments that need to be made, in order to communicate spa home designing interests and intentions to on-site residential contractors.

Each follows with brief comment, after we display an unannotated detail set of basic references.

This note of General Considerations has a second meaning; namely, the home spa designer did not fall off the turnip truck on his way to home drawing these home plans.  If the AG knew and respected the cement residential contractor's work, he probably would not write down these points - they'd be understood.  But the AG does not know who'll do the site work.  So, this is a sign that the old geezer arrived in a pickup truck, ready for a hard day's work doing it the right way.

Now, we'll get to more down-to-earth house plans details.

First, the spa stem wall, CAD detail section drawing in elevation.

There's a lot of important detail on this one - width, height, substrates, etc.  It's all standard stuff for a really good residential contractor.  Still, it's better to be safe and boring and obvious, than wish you had.  Foundations are a mother to modify much or move.

This next one's a different spa story - CAD detail in plan view.

In squared-off, new foundations, the point here isn't usually worth making; however, there's nothing squared-off about this foundation.  The point worth making:  rebar and concrete have different coefficients of expansion and contraction, and we want the footings to hold up over time.  Running laps incorrectly to the inside and not the outside at corners and not pinning them with vertical bars right at each of their turns is asking for trouble.  This is little-to-no extra effort in formwork and placing, and there is a big difference in durability.

Now comes the AG obsessive streak.  He's sure that unless he makes this spa home design point a heap of times in the home drawing, the formwork will pass it by and the job's screwed.  What's the obsession?  That the existing concrete pad under the tub is to end up about 3" below the top of the stem wall and the new concrete pad.  That's all this is saying.  (And will say over and over again.)  And don't you forget it.

Drainage is key to the long-term success of this building project.  The soil on the site is expansive.  Shedding excess moisture from the new foundation helps to assure structural stability.  Drainage overall must be carefully planned.  There are three water sources to shed: runoff, sanitary, and in-ground.  This detail spa home drawing makes two major points:

  1. Shed those three sources separately (to keep them from fouling each other, and to assure that the sanitary drainage is isolated);
  2. Be most careful with in-ground moisture, considering augmenting it with separate provision interior to the stem wall foundation.  The clients are encouraged to hire residential contractors who are not only highly regarded but highly regarded locally.  Again, a CAD detail section drawing in elevation . . .

Finally, back to the more or less obvious.  The AG is not interested in miscommunicating intentions.  What's on his mind here is to make sure that the new foundation is big and strong and stable.  This home drawing puts dots on some i's and crosses some t's.  If there was any temptation to set a little foundation footing and foundation stem wall a little ways down in the ground, this should rid that weak-mindedness.  Farther north and we'd go deeper.  This bad boy is going down in the southern U.S. and should go down to stay put.

CAD detail section drawing, in elevation

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