Description

This document:

Provides guidelines to aid in the evaluation of the performance of slab-on-ground foundations;

Provides guidelines to aid in the evaluation of the performance of residential and other similarly constructed low-rise buildings with slab-on-ground foundations;

Applies to post-tensioned and non-post-tensioned slab-on-ground foundations; and

Applies to all soil conditions.

This document is not intended to fully describe the causes or mitigation of foundation movement; however, a brief overview of the causes and mitigation of foundation movement is provided in Chapter 3.0.

The concepts found in this document may be applicable for evaluating other construction techniques as deemed appropriate by the licensed design professional (LDP). The concepts found in this document may be supplemented by additional evaluation techniques and procedures.

Table of Contents

1.0 — INTRODUCTION

2.0 — DEFINITIONS

3.0 — BRIEF OVERVIEW OF FOUNDATION MOVEMENT

3.1 Causes of foundation movement

3.2 Mitigation of foundation movement

3.3 Evaluation of foundation movement

4.0 — DATA ACQUISITION

4.1 Interview

4.2 Document Review

4.3 Visual Observations

4.4 Floor Elevation Survey

4.5 Additional Data

5.0 — DATA EVALUATION

5.1 Building plan

5.2 Distress plan or inventory

5.3 Elevation Plans

5.3.1 Survey (Unadjusted) Elevation Plan

5.3.2 Adjusted Elevation Plan

5.3.3 Adjusted Elevation Contour Plan

5.3.4 Time-Change Elevation Plan

5.3.5 Time-Change Elevation Contour Plan

6.0 — CRITERIA FOR FOUNDATION MOVEMENT

6.1 Curvature

6.2 Tilt

6.3 Equations and Examples

6.3.1 Equations

6.3.2 Calculation Examples

6.4 Examples Using Elevations and Contours to Check Various Cross Section Profiles

7.0 — CRITERIA FOR FOUNDATION ASSESSMENT

8.0 — SUMMARY AND CONCLUSIONS

9.0 — REFERENCES

9.1 Recommended References

ADDENDA AND ERRATA INFO

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