Criteria for Selection and Design of Residential Slabs-on-Ground -- Copyright -- FOREWORD -- CONTENTS -- I INTRODUCTION -- 1.0 STATEMENT OF THE PROBLEM -- 2.0 REPORT ORGANIZATION -- 3.0 BACKGROUND -- 3.1 History -- 3.2 Need for This Study -- 3.3 Study Scope -- 3.4 Study Limitations -- 4.0 USE OF THIS REPORT -- II CONCLUSIONS AND RECOMMENDATIONS -- 1.0 SLAB SELECTION AND/OR DESIGN PROCEDURE -- 1.1 Selection of Slab Type -- 1.2 Procedure When Type I Is Recommended -- 1.3 Procedure When Type II Is Recommended -- 1.4 Procedure When Type III Is Recommended -- 1.5 Procedure When Type IV Is Recommended -- 2.0 HEATED AND UNHEATED SLABS -- 3.0 NONRECTANGULAR SLABS -- 4.0 SLABS ON UNSTABLE SOILS -- 5.0 SLABS OF UNUSUAL CONFIGURATION -- 6.0 QUALITY CONTROL PRACTICES -- III RESEARCH RECOMMENDATIONS -- 1.0 GENERAL -- 2.0 SOILS RESEARCH -- 2.1 Investigation of Granular Mats or Stabilized Soil Mats -- 2.2 Soil/Moisture Relationships -- 2.3 Swelling Properties of Clay Soils -- 2.4 Stabilization of Soils for Residential Construction -- 2.5 Identification of Problem Soil Areas -- 3.0 SLAB RESEARCH -- 3.1 Field Investigation -- 3.2 Cracking of Slabs -- 3.3 Effect of Partition Loads on Unreinforced Slabs -- 3.4 Maximum Deformation of Unreinforced Slabs -- 3.5 Effective Stiffness of Stiffened Slabs -- 3.6 Effect of Slab Stiffness on Superstructure -- 3.7 Controlled Design and Construction -- 3.8 Investigation of Other Stiffened-Slab Designs -- 3.9 Investigation of Prestressed and Precast Slabs -- 4.0 PRIORITY -- IV SUPPLEMENTARY INFORMATION -- PART A: SELECTION AND DESIGN OF SLABS -- 1.0 FUNCTIONS OF SLABS-ON-GROUND -- 2.0 FUNDAMENTAL FACTORS OF SLAB DESIGN AND CONSTRUCTION -- 3.0 SELECTION OF SLAB TYPE -- 3.1 Types of Slab-On-Ground -- 3.1.1 Slab Type I -- 3.1.2 Slab Type II -- 3.1.3 Slab Type III -- 3.1.4 Slab Type IV -- 3.2 Soil Investigation.

3.3 Climatic Rating -- 3.4 Correlation of Climate and Soil for Selection of Slab -- 4.0 CRITERIA FOR TYPE I SLABS -- 4.1 General -- 4.2 Site -- 4.3 Dimensions -- 4.4 Irregular Shapes -- 4.5 Weakened-Plane Joints -- 4.6 Embedment in Slab -- 4.7 Loads -- 4.8 Openings -- 5.0 CRITERIA FOR TYPE II SLABS -- 5.1 General -- 5.2 Dimensions -- 5.3 Reinforcement -- 5.4 Embedment in Slab -- 5.5 Irregular Shapes -- 5.6 Loads -- 5.7 Openings -- 6.0 EXAMPLE OF PROCEDURE FOR DETERMINING WHETHER A TYPE I OR II SLAB IS APPROPRIATE, AND APPLICATION OF CRITERIA -- 6.1 General -- 6.2 Determination of Slab Type -- 6.3 Procedure -- 7.0 DESIGN OF TYPE III SLABS -- 7.1 Effect of Superstructure -- 7.2 Effect of Soil Behavior -- 7.3 Support Index -- 7.4 Increase of Support Index (C) -- 7.5 Determination of Support Index (C) for Compressible Soils (2.5qu/w>or equal to2.5) -- 7.9.1 Behavior of Compressible Soils under Uniform Load (w) -- 7.9.2 Assumed Reactions and Corresponding Support Index (C) for Slabs on Compressible Soils -- 7.9.3 Design Sequence -- 7.10 Related Design Considerations -- 7.10.1 Concentrated Loads on the Slab -- 7.10.2 Limiting Reinforcement -- 7.10.3 Embedment of Conduits in the Slab -- 7.10.4 Other Stiffened-Slab Designs -- 7.11 Example 1-Design of Type III Slabs Supported on Expansive Soils.

7.11.1 Determination of Slab Type -- 7.11.2 Application of Type III Procedure -- 7.11.3 Design of Slab One-Analytical and Chart Procedures -- 7.11.4 Design of Slab Two-Chart Procedure Only -- 7.11.5 Discussion of Design -- 7.12 Example 2-Design of Type III Slabs Supported on Expansive Soils: Shallow Beams -- 7.12.1 Determination of Slab Type -- 7.12.2 Application of Type III Procedure -- 7.12.3 Design of Slab One -- 7.12.4 Design of Slab Two -- 7.13 Example 1-Design of Type III Slabs Supported on Compressible Soils -- 7.13.1 Given Conditions -- 7.13.2 Application of Type III Procedure -- 7.14 Example 2-Design of Type III Slabs Supported on Compressible Soils -- 8.0 DESIGN OF TYPE IV SLABS -- PART B: QUALITY CONTROL -- 1.0 GENERAL -- 2.0 SITE PREPARATION -- 2.1 Fills -- 2.1.1 Controlled Fills -- 2.1.2 Uncontrolled Fills -- 2.1.3 Cut-and-Fill -- 2.1.4 Construction of Fills -- 2.1.5 Fill Materials -- 2.2 Natural Moisture Control -- 2.3 Site Drainage -- 3.0 SLAB MATERIALS -- 3.1 Concrete Quality -- 3.2 Test for Concrete Consistency -- 3.3 Admixtures -- 4.0 CONCRETE PRACTICES -- 4.1 Engineer or Architect Supervision -- 4.2 Ready-Mix Concrete without Engineer or Architect Supervision -- 4.3 On-Site Mixing -- 4.4 Concrete Placing and Finishing -- 4.5 Curing Practices -- PART C: SOILS -- 1.0 GENERAL -- 2.0 UNIFIED SOIL CLASSIFICATION SYSTEM -- 2.1 Identification and Classification -- 2.2 Aids to Soil Identification -- 2.3 Major Soil Classes -- 3.0 PROBLEM SOILS -- 3.1 Loess -- 3.2 Highly Compressible Clays -- 3.3 Expansive Clays -- 3.4 Highly Plastic Soils -- 3.5 Sands and Silts -- 4.0 UNDISTURBED CONDITION OF SOILS -- 4.1 Natural Density of Sands and Silts -- 4.2 Consistency of Cohesive Soils -- 5.0 NONPROBLEM SOILS -- APPENDIX A DESIGN TABLES -- EXAMPLE OF USE OF TABLES -- KEY TO TABLE SYMBOLS -- APPENDIX B DEFINITIONS AND ABBREVIATIONS.

APPENDIX C TECHNICAL REFERENCES -- APPENDIX UNIFIED SOIL CLASSIFICATION CHART.