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Please log into the webinar 15 – 30 minutes before start time.
Thursday, September 15, 2022
8:30 am – 4:30 pm CDT (including a 30-min. break)
Bill Simpson P.E.
Retaining Walls: What They Do and How They Do It
Defining “the wall”
Identifying forces on a retaining wall
How to account for and resist soil pressure
How water pressure impacts a retaining wall
The properties of the soil that contribute to the wall design
Equations and examples
Geosynthetics and Retaining Walls, Embankments and Slopes
Properties of common geosynthetics
How an MSE wall differs from other wall types
Discussion of different blocks, reinforcement, and their interaction
Design code requirements for an MSE wall
Geosynthetic properties for use in slope stabilization
Equations, calculations, and examples of internal stability of an MSE wall
Unreinforced Slope Stability Analysis
Fundamentals of slope instability
Soil and geological mechanics related to slope instability
How geologic conditions affect slope stability
Observations of slope instability
Construction practices to improve or restore slope stability
Equations, calculations and example of an unreinforced slope
Reinforced Slope Stability Analysis
Geosynthetic properties for use in slope stabilization
Deep seated stability analysis
Equations, calculations, and example of using geosynthetics to reinforce a slope
Soil properties and conditions that contribute to slope stability
Material required for the exposed face of the slope to maintain long term stability
Retaining Wall/Slope Lessons Learned
Preventing problems or failures of walls and slopes through improved site layout
Commonly overlooked design code requirements related to retaining wall layout and design
Roles and responsibilities of the design and construction team to ensure structure success
Typical causes of problems or structure failure
Recognizing and preventing a problem during construction
How water (both surface and below ground) affects an earth structure
What measures to take during construction to ensure long term earth structure success
Case histories and examples of failed structures
Each webinar session earns continuing education credit and can be registered for individually. All attendees must log-on through their own email – attendees may not watch together if they wish to earn continuing education credit. HalfMoon Education Inc. must be able to prove attendance if either the attendee or HalfMoon Education Inc. is audited.
Certificates of completion can be downloaded in PDF form upon passing a short quiz. A link to the quiz will be sent to each qualifying attendee immediately after the webinar. The certificate can be downloaded from the Results page of the quiz upon scoring 80% or higher.
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7.0 HSW CE Hours
7.0 AIA LU|HSW
7.0 HSW CE Hours
7.0 LA CES HSW PDH
7.0 ASFPM CECs
International Code Council:
.7 CEUs (Sitework)
Continuing Education Credit Information
This webinar is open to the public and is designed to qualify for 7.0 PDHs for professional engineers, 7.0 HSW continuing education hours for licensed architects, and 7.0 HSW continuing education hours for landscape architects in all states that allow this learning method. Please refer to specific state rules to determine eligibility.
HalfMoon Education is an approved continuing education sponsor for engineers in Florida (Provider No. 0004647), Indiana (License No. CE21700059), Maryland, New Jersey (Approval No. 24GP00000700) and North Carolina (S-0130). HalfMoon Education is deemed an approved continuing education sponsor for New York engineers and architects via its registration with the American Institute of Architects Continuing Education System (Regulations of the Commissioner §68.14(i)(2) and §69.6(i)(2)). Other states do not preapprove continuing education providers or courses.
The American Institute of Architects Continuing Education System has approved this course for 7.0 LU|HSWs (Sponsor No. J885). Only full participation is reportable to the AIA/CES.
The Landscape Architecture Continuing Education System has approved this course for 7.0 HSW PDHs. Only full participation is reportable to the LA CES.
The International Code Council has approved this event for .7 CEUs in the specialty area of Sitework (Preferred Provider No. 1232).
This webinar has been approved by the Association of State Floodplain Managers for 7.0 CECs for floodplain managers.
Attendance will be monitored, and attendance certificates will be available after the webinar for those who attend the entire course and score a minimum 80% on the quiz that follows the course (multiple attempts allowed).
Bill Simpson P.E.
Geotechnical Structure Design Specialist at Gradelta Engineering.
Mr. Simpson founded Gradelta Engineering in 2020 with the intent to help clients better understand the combination of geotechnical and structural engineering that he has worked with for the past 20 years. He earned his B.S.C.E. and M.S.C.E. degrees from Georgia Institute of Technology. He currently provides engineering services to contractors and fellow engineers for earth structure pricing, along with the plans and calculations needed for construction. He frequently consults with clients regarding the optimal structure type and location on the construction site to minimize risk and maximize useable space. He also works in the education sector providing not just seminars such as this one, but also acting as a subject matter expert creating study guide and test prep content for the NCEES Professional Civil Engineer exam. Mr. Simpson has also worked with lawyers and insurance companies during forensic investigation and lawsuits surrounding retaining walls and slope failures. His hope is that through the instructional services that he currently provides, slopes will remain stable and retaining wall failure will be eliminated.
AIA Provider Statement:
HalfMoon Education Inc. is a registered provider of AIA-approved continuing education under Provider Number J885. All registered AIA/CES Providers must comply with the AIA Standards for Continuing Education Programs. Any questions or concerns about this provider of learning program may be sent to AIA/CES (email@example.com or (800) AIA 3837, Option 3).
This learning program is registered with AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product.
AIA continuing education credit has been reviewed and approved by AIA/CES. Learners must complete the entire learning program to receive continuing education credit. AIA continuing education Learning Units earned upon completion of this course will be reported to AIA/CES for AIA members. Certificates of Completion for both AIA members and non-AIA members are available upon request.
Course Title: Retaining Wall Design and Global Stability Analysis
Delivery Method: Live Online
Course Description: This comprehensive seven-hour course explores all aspects of retaining walls and slope stability for design professionals, including but not limited to definitions, soil science, geosynthetics, embankments, slopes, reinforced and unreinforced slope stability analysis, and failure prevention.
Learning Objective 1:
Learners will be able to discuss the function and design of retaining walls and how they are able to resist different measurable forces such as soil pressure and water pressure. Equations and examples on how to calculate these pressures will be provided and demonstrated.
Learning Objective 2:
Learners will be able to identify geosynthetics and their properties in order to understand how mechanically stabilized earth (MSE) walls differ from other types of walls. Design code requirements, reinforcement, equations, calculations and examples of MSE walls are also discussed.
Learning Objective 3:
Learners will be able to perform unreinforced slope stability analysis through an understanding of slope instability fundamentals, the soil and geological mechanics related to slope instability, how geologic conditions affect stability, construction practices that improve or restore stability, and related equations, calculations and examples.
Learning Objective 4:
Learners will be able to recognize and prevent typical causes of problems or failures and commonly overlooked design code requirements related to retaining wall layout and design.
Learning Objective 5:
Learners will be able to determine the roles and responsibilities of the design and construction team to ensure structure success, as well as prevent problems or failures of walls and slopes through improved site layout.
LUs: 7.0 LU Type: LU|HSWs.
Prerequisites: Experience with earthwork and site analysis
Advance Preparation: None
Program Level: Intermediate
Course Expiration Date: 06/23/2025
Complaint Resolution Policy:
Complaints regarding this course can be emailed to firstname.lastname@example.org or by calling (715) 835-5900. A HalfMoon Education representative will respond within 72 hours to resolve the complaint, which will include, but not limited to, access to another CE activity at no or reduced cost or a full or partial refund. Each instance will be resolved on a case-by-case situation.