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DC10.2-17

DC10.2-17: Construction and Maintenance Manual for PT Slab-on-Ground Foundations

DESCRIPTION

This manual provides guidance for builders, subcontractors, and field personnel involved in the installation, stressing, and finishing of unbonded single-strand tendons used in the construction of light commercial and residential ground-supported foundation slabs.

 

80 pages; 8½ x 11 in. (soft cover)

 

Published 2017

TABLE OF CONTENTS

TABLE OF CONTENTS

1.0 INTRODUCTION

1.1 Purpose

1.2 Fabrication of Tendons

1.3 Responsibilities

1.4 Definitions

 

2.0 DOCUMENT CONTROL

2.1 General

2.2 Installation Drawings

2.3 Shipping Documents

2.4 Material Certifications

2.5 Jack Calibration

2.6 Stressing Records

2.7 Concrete Placement Records

 

3.0 ACCEPTANCE, DELIVERY, HANDLING AND STORAGE

3.1 Acceptance and Delivery

3.2 Handling and Storage

 

4.0 BUILDING PAD PREPARATION

4.1 Site Preparation

4.2 Forming

4.3 Vapor Retarder

4.4 Leveling Base

 

5.0 INSTALLATION

5.1 General

5.2 General Installation Procedures

5.3 Field Installation of Fixed-End Anchorages

5.4 Specific Installation Procedures

5.5 Installation of Non-Prestressed Reinforcement and Other Embedded Items

5.6 Special Installation Procedures for Commercial and Industrial Slabs

5.7 Reinforcement Placing Tolerances

5.8 Cover Requirements

5.9 Tendon Sheathing Repair

5.10 Inspection Prior to Placing Concrete

 

6.0 ENCAPSULATED SYSTEM

7.0 CONCRETE

 

7.1 Materials

7.2 Placement

7.3 Finishing

 

8.0 TENDON STRESSING

8.1 General

8.2 Preparation for Stressing

8.3 Stressing the Tendons

8.4 Causes of Improper Elongation

8.5 Problems That Can Occur During Stressing

8.6 Safety Considerations

8.7 Don’ts of Stressing

8.8 Inspection Before, During and After Stressing Tendons

 

9.0 ELONGATION MEASUREMENTS

9.1 General

9.2 Preparation

9.3 Measurement

9.4 Recording

 

10.0 TENDON FINISHING

10.1 General

10.2 Specific Requirements

10.3 Cutting of Tendon Tails

10.4 Patching of Pocket Former Recesses

 

11.0 JOB SITE TROUBLESHOOTING

11.1 General

11.2 Preventing the Most Frequent Problems

11.3 Strand Slippage and/or Jack “Hung Up”

11.4 Honeycomb in Concrete

11.5 Tendon and Concrete Blowouts

11.6 Tendon Rupture

11.7 Tendons Too Short to Be Stressed Using Normal Stressing Procedures

11.8 Splicing Tendons

11.9 Cracked Wedges

11.10 “Lift-Off ” Procedures

11.11 Troubleshooting Stressing Equipment

 

12.0 PROPERTY OWNER MAINTENANCE

 

13.0 LANDSCAPING

 

14.0 EXAMPLE PLANS FOR RESIDENTIAL SLAB-ON-GROUND FOUNDATIONS

14.1 General Notes

14.2 Example Typical “Ribbed” Foundation Plan

14.3 Example Typical “Uniform Thickness” Foundation Plan

15.0 APPENDIX

15.1 Example Strand Material Certification

15.2 Example Jack Calibration Form

15.3 Example Stressing Record Form

16.0 TABLES

16.1 Table of Elongation Values

 

17.0 REFERENCES

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