Webinar instructions will be emailed before the date of the webinar.
Please log into the webinar 15 – 30 minutes before start time.
Monday, August 15, 2022
2:00 – 4:00 pm CDT
Bill Simpson, P.E.
Types of stability required: bearing, overturning, sliding
Data necessary to make stability calculations
Check soil bearing pressure
Check for stability against overturning
Check for stability against sliding
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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2.0 HSW CE Hours
2.0 AIA LU|HSW
2.0 HSW CE Hours
2.0 LA CES HSW CE Hours
International Code Council:
Continuing Education Credit Information
See each course listing for the type and amount of each continuing education credit available. Individual courses for engineers and architects are not subject to pre-approval. HalfMoon Education does not apply for landscape courses in NJ or land surveyor courses in NJ or TN, unless expressly stated.
HalfMoon Education Certifying Entities
American Institute of Architects Continuing Education System (No. J885)
International Code Council (No. 1232)
Landscape Architect Continuing Education System
American Institute of Certified Planners (AICP)
Boards of Engineering: Florida (No. 0004647), Indiana (License No. CE21700059),
Maryland, New Jersey (Approval No. 24GP00000700), and North Carolina (No. S-0130).
Association of State Floodplain Managers
International Society of Arboriculture
Society of American Foresters
HalfMoon Education is deemed a New York-approved continuing education provider for engineers, architects, and landscape architects via its registration with the American Institute of Architects Continuing Education System (Regulations of the Commissioner §68.14(i)(2), §69.6(i)(2), and §79-1.5(i)(2)). Only AIA HSW-approved courses qualify for New York engineer and architect credit.
Completion certificates will be awarded to participants who complete this event, respond to prompts, and earn a passing score (80%) on the quiz that follows the presentation (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 (firstname.lastname@example.org 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: Determining and Checking the Stability of Retaining Walls
Delivery Method: Live Online
Course Description: This two-hour course will assist design professionals in monitoring and analyzing the stability of retaining walls by discussing the types of stability, identifying the data that is necessary to perform certain calculations, explaining how to check soil bearing pressure, and instructing how to check for stability against overturning and sliding.
Learning Objective 1:
Learners will be able to identify and explain the types of stability that is required for a retaining wall: bearing, overturning, and sliding.
Learning Objective 2:
Learners will be able to determine and gather the necessary data to make stability calculations.
Learning Objective 3:
Learners will be able to check the soil bearing pressure by performing the appropriate calculations.
Learning Objective 4:
Learners will be able to check for retaining wall stability against overturning and sliding.
LUs: 2.0 LU Type: LU|HSWs.
Prerequisites: Familiarity with retaining wall design
Advance Preparation: None
Program Level: Intermediate
Course Expiration Date: 06/13/2025
Complaint Resolution Policy:
Complaints regarding this course can be emailed to email@example.com 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.