Soil-Structure Interaction Seminar - Foundation Performance ...

2. Standard: Uninhabitable, unsanitary, or unsafe ("UUU")
G. "L/360" -- ACI 318
a. Differs from industry standards of construction and design-build.
b. Example: "Sticking doors" are not defective construction or
design, in and of themselves, but may trigger the HOW Warranty.
c. Provide home purchasers with maintenance manual at closing.
1. Allowable post-tension movement < L/360
2. Slope vs. deflection
l
3. Disagreements as to how measured in industry-- Is it misapplied?
4. Really begs the question: Is the balance of the structure failing due to the
foundation's movement?
5. Everyone knows that minor foundation movement is normal in Houston,
Texas;
6. Everyone knows that cure cracks occur in concrete;
7. Everyone knows that sheetrock cracks occur on a new home.
8. References to BRAB, Snowden & Littleton, and Post-Tension Institute.
9. No foundation is ever poured absolutely level.
10. U360 is really a standard for new construction -- tec:mically, it only
applies at construction.
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