SlabWorks - Design of Foundations

There are three generally recognized methods for the design of slabs-on-grade for expansive soil. SlabWorks implements all three methods. A general discussion of each design method and SlabWorks™ implementation can be found at the links below:

PTI Design Method (Bonded or post-tension reinforcement)
WRI Design Method (Bonded or post-tension reinforcement)
BRAB Design Method (Bonded or post-tension reinforcement)

General design guidance and building code requirements for foundations on expansive clay can be found at:

General Design Guidance
Building Code Requirements
Deep Foundations (Pier and Beam or Elevated Structural Slabs)

Off-Site Resources

WRI TF 700-R-03: Design of Slab-on-Ground Foundations. WRI design guide for foundations on expansive clay.
WRI TF 700 Update. Latest update to WRI design manual.
BRAB Report 33, Criteria for Selection and Design of Residential Slabs-on-Ground at the National Academies Press.
PTI Design of Post-Tensioned Slabs-On-Ground (3rd Edition) and Addendum No 1.
The US Army Corps of Engineers publishes an excellent manual on the design of foundations, T5-818-7 Foundations in Expansive Soils (4.5 MB PDF).
The Texas Section of the ASCE Recommended Practice for the Design of Residential Foundations.

The Federal Highway Administration publishes several reports that are of interest to the engineer designing foundations on expansive clay.

An Occurrence and Distribution Survey of Expansive Materials in the United States by Physiographic Areas (1.5 MB PDF)
A Review Of Engineering Experiences With Expansive Soils In Highway Subgrades (10.2 MB PDF). While this document does not directly address foundation on expansive clay, it contains significant information of interest to the design professional.