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Fat books on broad subjects such as "Soil Mechanics" seem to omit what I want. To me, the following are altogether essential: "Design of Shallow Foundations", ASCE Press, 1999, Samuel E. French Chapter 11 asks for a "Kings X" on expansive soils, which aren't going away, but I like it very much...

There are building code requirements preventing the common practice, but it is still the common practice. One explicit such requirement is that non-bearing partitions not be placed so as to receive load and thereby change the action of the roof structure. Design loads are seldom realized right...

I suppose the piles are treated. The holes would take the benefit away. To know whether the concrete enlargement would do any good, you would have to know a lot about the soil, or put a whole lot of concrete, which, if engaged with the pile, as by bolts, might load the pile to misfortune...

The Powers and Simpson anchors are identical, made by the same people, coming from Taiwan of the same ships. Names differ. The sw input is quite different, and caution is needed. One wants eff. h, the other wants embedment h, etc. The only thing I can't reconcile so far is that Simpson...

I have compared Simpson and Powers software enough to raise some questions, based on the fact that the pictures made me think that they were the same hardware, but differently branded. Running the software, I get somewhat different answers, so I suspect that they are different. I may or may...

I am answering somewhat prematurely because I haven't exercised the software enough to be sure, but, as Mike said, Simpson has a free package called ACI318 something like PDA2, but it is pint-sized and weak-kneed and nowhere near as convenient and fast and thorough to use as PDA2, and they seem...

I need tie down some wood-frame shearwalls to an existing slab. I found a program PDA-2, Powers Design Assist 2, which does an astounding job, but I can't believe the values. I also doubt my own values. e.g. I find that a 3/8" PowerStud 2 embedded 2" into 2500 psi cracked concrete, at...

I think that "flitch" derives from "fleche", or feather. The flitch is the thin or thinner thing. I would not be confident that an outside plate on an inside wood beam would be prevented from wrinkling unless I did a bunch of work about wrinkling or buckling.

You are right that the slab becomes structural if it is tied to something. The earth moves little some places and much others. If the soil is very uniform and granular and not subject to much change in moisture content, it moves very little. If it is a fine-grained soil, especially a clay...