Description

The purpose of this document is to demonstrate that making openings in existing post-tensioned slabs is not only possible but is routinely performed in retrofit projects. The document describes a comprehensive process that can be used to create openings in post-tensioned slab systems constructed with unbonded single-strand tendons. Included is a discussion of the required structural analysis as well as construction methods and procedures used to create openings. An actual project’s case study illustrates the process. Many illustrations provide additional support in understanding of the subject matter.

10 pages; 8½ x 11 in. (soft cover)

Published July 2010

Table of Contents

1.0—Introduction

2.0—Scope

3.0—Small penetrations and openings

4.0—Large openings

5.0—Slab strengthening options

6.0—Work procedure

7.0—Case study: BWI Airport slab openings

8.0—Designing PT slabs with flexibility in mind

8.1—Spacing of uniform tendons

8.2—Using knock-out panels

8.3—Marking tendon locations

9.0—Summary

10.0—References

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