The following is a preconstruction checklist for General Contractors / Construction Managers that can be used for Unbonded Post Tensioning projects. It has saved AMSYSCO, Inc. and its Clients from costly errors, revisions, delays and problems. These checklist(s) are not inclusive and are only meant to help post tensioned concrete projects.
Checklist – BEFORE Post Tensioning shop drawings are started
1. Does the Post Tensioning Supplier have the latest and complete set of Structural Drawings and/or Architectural elevations/floor Plans?
2. Does the Post Tensioning Supplier have the latest Post Tensioning specifications and/or Barrier Cable specifications?
3. Has the pour sequence been finalized showing pour numbers, construction joints and/or pour strips?
4. Are there any restrictions to stressing tendons due to existing buildings, shear/elevator/stair walls or space limitations?
5. Have the major slab openings been coordinated and approved by the Structural Engineer?
6. Are structural CAD Files available to save time on detailing shop drawings?
7. For residential/office buildings: Are MEP CAD Files available for coordination with Post Tensioning drawings?
Checklist – BEFORE Post Tensioning is awarded
1. Does the jobsite have a copy of the Post Tensioning Institute’s “Field Procedures Manual for Unbonded Single Strand Tendons” (3rdEdition is current as of 2009)?
2. Does the Post Tensioning Installer have an individual who is currently certified under the Post Tensioning Institute’s “Level 2 Field Certification for Superstructure Ironworkers” program (or approved equal certification program)? Are the other members of the installation crew certified under the Post-Tensioning Institute’s “Level 1 Field Fundamentals of Installation” program?
3. Does the Post Tensioning Inspector have an individual who is currently certified under the Post Tensioning Institute’s “Level 2 Field Certification for Inspector” program (or approved equal certification program)?
4. Is the Post Tensioning Supplier certified under the Post Tensioning Institute’s “Plant Certification” program?
5. Does the Post Tensioning Installer have an individual with experience with hydraulic stressing equipment for Post Tensioning? This individual should have a current PTI-Certification (Level 2 Ironworker), be onsite and have a proven track record of working with stressing equipment. Safety is priority one.
- Rattan Khosa, AMSYSCO
Copyright © 2009 by AMSYSCO, Inc. All rights reserved.