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Part 1 - Design of Post-Tensioned Diaphragms

Item #: SK2020SWL056
Price: $275.00
Volume Discount
Quantity Price
1 $275.00
2 $245.00
3 $210.00
4 $175.00
5 $160.00
6 and up $145.00
Member Price: $275.00
Volume Discount
Quantity Price
1 $220.00
2 $196.00
3 $168.00
4 $140.00
5 $128.00
6 and up $116.00
Member Savings: $0.00
Format: Online Live
Duration: 2.00
$275.00
September 5, 2023; 11:00 AM – 1:00 PM Pacific Time
Bryan Allred, S.E.

The webinar will cover the design of post-tensioned diaphragms highlighting the benefits of precompression to reduce or eliminate additional drag and chord reinforcement. A discussion of how concrete diaphragms should be model will be presented and how a traditional steel or wood diaphragm approach does not apply to a concrete membrane. Construction photographs and details will be shown to clarify the design intent.

Part 1:
  • Diaphragm Forces
  • Diaphragm Analysis – Different Approaches
  • Moment and Shear Diagrams
  • Diaphragm Design – Two Methods Used – Wood versus Concrete
  • “Wood” Design Example
Part 2:
  • Diaphragm Design – Concrete Method Example
  • Comparison between Different Methods
  • Use of Precompression in Diaphragm Design
  • Collectors and use of Omega Factor
  • Detailing
  • Chord Design


Speaker Bio

Bryan Allred, S.E. is a licensed structural engineer who specializes in the design of reinforced concrete buildings utilizing post-tensioned floor systems. He is the co-author of the book “Post-Tensioned Concrete Principles and Practice” which covers the design of post-tensioned concrete structures from basic fundamentals to specific construction detailing. Bryan is a fellow of the Post-Tensioning Institute (PTI), a member of their Building Design Committee and has given numerous PTI educational seminars across the country highlighting the use and benefits of post-tensioning.

Bryan Allred, S.E. is a licensed structural engineer who specializes in the design of reinforced concrete buildings utilizing post-tensioned floor systems. He is the co-author of the book ``Post-Tensioned Concrete Principles and Practice`` which covers the design of post-tensioned concrete structures from basic fundamentals to specific construction detailing. Bryan is a fellow of the Post-Tensioning Institute (PTI), a member of their Building Design Committee and has given numerous PTI educational seminars across the country highlighting the use and benefits of post-tensioning.

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