Title:
Thoughts Concerning Post-Tensioning Elongation Records
Author(s):
Bryan Allred, Frank Malits, and Neel Khosa
Publication:
Concrete International
Volume:
47
Issue:
6
Appears on pages(s):
39-42
Keywords:
strand, stressing, tolerance, review
DOI:
10.14359/51747830
Date:
6/1/2025
Abstract:
For all concrete structures, cost effectiveness is heavily influenced by the timing of formwork cycling. For post-tensioned structures, review and approval of elongation records is a critical step within each formwork cycle. This article explores the timeliness of reviews, purpose of elongations and tolerances, evaluation of stressing records, and reasonable expectations for all stakeholders.
Related References:
1. ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318-11) and Commentary (ACI 318R-11),” American Concrete Institute, Farmington Hills, MI, 2011, 503 pp.
2. ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318-19) and Commentary (ACI 318R-19),” American Concrete Institute, Farmington Hills, MI, 2019, 624 pp.
3. Allred, B.; Khosa, N.; and Maltis, F., “Thoughts Concerning Post-Tensioning Elongation Records,” PTI Journal, V. 20, No. 2, Oct. 2024, pp. 6-11.
4. PTI CRT20 G1-1124, “Manual for Certification of Plants Producing Unbonded Single Strand Tendons,” Post-Tensioning Institute, Farmington Hills, MI, 2021, 63 pp.
5. PTI TAB.1-23, Post-Tensioning Manual, seventh edition, Post-Tensioning Institute, Farmington Hills, MI, 2023, 422 pp.
6. “Personnel Certification Overview,” Post-Tensioning Institute website, https://www.post-tensioning.org/certification/fieldpersonnelcertification/personnelcertificationoverview.aspx, accessed April 16, 2025.