Post-Tension Slabs: Analysis, Design & Construction
Credits: 3 PDH
PDH Course Description:
Post-tensioned concrete slabs have become an increasingly important structural solution for buildings and infrastructure projects requiring longer spans, reduced structural depth, improved serviceability, and efficient use of construction materials. However, achieving these benefits depends on a clear understanding of post-tensioning behavior, tendon layout, prestress losses, stress limitations, construction procedures, and strength requirements.
This 3-PDH course provides practicing engineering professionals with a practical and structured introduction to the analysis, design, and construction of post-tensioned concrete slabs. The course explains how post-tensioning systems work and introduces their principal components, bonded and unbonded systems, tendon profiles, material properties, construction sequence, stressing operations, and grouting procedures.
The course then examines the behavior of post-tensioned members at the transfer, service, and ultimate stages. Participants will review primary and secondary moments, initial and final concrete stresses, short-term and long-term prestress losses, tendon stress limitations, and the evaluation of flexural and shear strength. A detailed design example is included to demonstrate the application of key engineering calculations and design checks.
In addition, the course compares post-tensioned slabs with conventional reinforced concrete slabs and discusses common construction deficiencies, deterioration mechanisms, inspection indicators, maintenance requirements, and repair considerations for existing post-tensioned structures.
Upon completion of this course, participants will be better prepared to understand post-tensioned slab behavior, interpret tendon arrangements and design requirements, evaluate critical serviceability and strength checks, recognize construction and maintenance concerns, and apply sound engineering judgment during the design, inspection, and repair of post-tensioned concrete structures.
Topics:
Upon successful completion of this course, participants will be able to:
- Explain the fundamental principles and structural behavior of post-tensioned concrete slabs.
- Identify the principal components of bonded and unbonded post-tensioning systems, including tendons, ducts, anchorages, and stressing equipment.
- Compare bonded and unbonded post-tensioning systems and identify their typical structural applications.
- Describe the principal construction stages of post-tensioned slabs, including formwork, reinforcement placement, tendon installation, concrete placement, stressing, elongation measurement, and grouting.
- Evaluate the principal advantages, limitations, and practical considerations associated with post-tensioned slabs compared with conventional reinforced concrete slabs.
- Interpret the mechanical properties and allowable stress limits of prestressing steel during stressing, anchoring, transfer, and service conditions.
- Explain the transfer, service, and ultimate loading stages and identify the design checks required at each stage.
- Determine primary, secondary, and net moments caused by prestressing forces in statically determinate and indeterminate members.
- Select and interpret appropriate tendon profiles and arrangements based on structural geometry and bending-moment distribution.
- Calculate and evaluate initial and final concrete stresses in post-tensioned members.
- Identify and calculate the principal short-term and long-term prestress losses, including friction, anchorage seating, elastic shortening, creep, shrinkage, and steel relaxation.
- Evaluate the flexural and shear strength of post-tensioned concrete members using applicable design principles and equations.
- Apply the principal analysis and design procedures through a detailed example involving a continuous post-tensioned slab.
- Recognize common signs of deterioration, construction deficiencies, corrosion, and damage in post-tensioned concrete structures.
- Identify appropriate inspection, maintenance, and repair considerations for deteriorated post-tensioned slabs and structural members.
To take this course:
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Intended Audience:
This course is intended for structural engineers, civil engineers, consulting engineers, forensic engineers, design professionals, construction engineers, licensed general contractors, inspectors, and other professionals involved in the analysis, design, construction, evaluation, maintenance, or repair of post-tensioned concrete slabs and structures.
Publication Source: Dr. Ibrahim Metwally, PE