PHOENIX, AZ - The Post-Tensioning Institute (PTI) - a non-profit organization for the advancement of post-tensioned, pre-stressed concrete design and construction - has announced the availability of the 2008 Supplement to the Third Edition of PTI's Design of Post-Tensioned Slabs-on-Ground.

The Third Edition was first printed in 2004. Since that time, the PTI Slab-on-Ground Committee has approved two addenda and various errata. The 2008 Supplement incorporates Addenda Nos. 1 and 2, and known errata. In addition, the supplement includes updated design examples to reflect these changes. The related code standards, Standard Requirements for Analysis of Shallow Concrete Foundations on Expansive Soils and Standard Requirements for Design of Shallow Concrete Foundations on Expansive Soils, are included as appendices as a convenience for designers. These standards are referenced by the International Building Code in its provisions for slab-on-ground foundations.

The Third Edition with 2008 Supplement may be purchased by contacting PTI or by visiting PTI's website at www.post-tensioning.org. The price of the publication is $48.50 for PTI members and $69.50 for non-members. Previous purchasers of the Third Edition will receive an additional $10 discount, which may be obtained by contacting PTI (not available online.)

Established in 1976, PTI focuses on research projects directed toward development of specifications and design recommendations, publication of technical literature on applications of post-tensioning, and an annual program of technical seminars to disseminate information on post-tensioning design and construction technology. PTI provides research, technical development, marketing and promotional activities for companies engaged in post-tensioned construction. Its publications are a major communication system for disseminating information on post-tensioning design and construction technology.