Sessions & Events

New and Updated Examples for Design Using the Strut-and-Tie Method, Part 2 of 2

Wednesday, October 29, 2025  11:00 AM - 1:00 PM, H - Holiday 3

This session will review updates to PRC-445.2-21: Strut-and-Tie Method Guidelines, which will include general updates as well as updates to conform to ACI 318-25. The session will also feature both new and updated design examples using the strut-and-tie method.

Learning Objectives:
(1) Discuss the application of the latest ACI requirements for design of bent caps using the strut-and-tie method;
(2) Discuss the application of the latest ACI requirements for design of dapped-end beams using the strut-and-tie method;
(3) Discuss the application of the latest ACI requirements for design of cantilever beams with openings using the strut-and-tie method;
(4) Discuss the application of the latest ACI requirements for design of pile caps using the strut-and-tie method.

This session has been approved by AIA and ICC for 2 PDHs (0.2 CEUs). Please note: You must attend the live session for the entire duration to receive credit. On-demand sessions do not qualify for PDH/CEU credit.

Four-Column Bent Cap: Updated for ACI 318 25

Presented By: Robin Tuchscherer
Affiliation: Northern Arizona University
Description: The design of a bent cap transferring six concentrated loads to four supporting columns is presented. The design is carried out in accordance with ACI 318-25. Two load cases are considered.

Dapped-End Double-Tee Beam: Updated for ACI 318-25

Presented By: Gary Klein
Affiliation: Wiss, Janney, Elstner Associates, Inc.
Description: This example describes the design of the support region of a dapped-end double-tee beam, the type of beam typically used in parking structures. The design is carried out in accordance with ACI 318-25 and features curve-bar nodes in the primary hanger reinforcement.

Large Propped Cantilever Beam with Opening: Updated for ACI 318-25

Presented By: Tjen Tjhin
Affiliation: COWI North America, Ltd.
Description: This example presents a strut-and-tie design for a storey-high propped cantilever beam that supports a single concentrated load near midspan and has a large rectangular opening between this point of loading and the fixed-ended support. The design is carried out in accordance with ACI 318-25.

Pile Cap with Tension Piles: Updated for ACI 318-25

Presented By: Widianto Widianto
Affiliation: ExxonMobil
Description: Two approaches (sectional design and STM) are presented for designing a deep pile-cap under a combination of axial load, shear, and moment that produces tension in some piles. The designs are carried out in accordance with ACI 318-25.

Pile Caps Subjected to Combined Axial and Biaxial Flexural Loading

Presented By: Yousun Yi
Affiliation: Walker Consultants
Description: A pile cap supported on four piles and subjected to axial compression combined with biaxial flexural effects is designed by using Strut and Tie Modeling (STM) provisions of ACI 318-25. The design loads induce tension in a partial column area and cause one of the four piles to go in tension.

Design of Disturbed Regions in a Continuous Transfer Beam using ACI 318-25

Presented By: Allan Kuan
Affiliation: RJC Engineers
Description: This example presents the design of a two-span continuous transfer beam supporting three columns and uniformly distributed loads. The locations of the concentrated loads relative to the supports result in localized D-regions. The beam is designed in accordance with ACI 318-25 using a design-verify-update procedure.