Webinar instructions will be emailed before the date of the webinar.

Please log into the webinar 15 – 30 minutes before start time.

Tuesday, July 25, 2023 
9:00 am – 4:00 pm CDT (including a 30-min. break)


Introduction and Importance of SSI 

  • Overview 
  • Types of SSI modeling 
  • Understanding and Implementing SSI 
  • Site shear wave velocity and fundamental period of structure 


Base Slab Averaging (BSA) and Embedment Effects 

  • Effective foundation size 
  • When to apply BSA 
  • How to calculate embedment depth 
  • Limitations and Issues 
  • Examples 


Foundation and Soil Flexibility, and Period Lengthening 

  • Soil properties for flexibility calculations 
  • Vertical and rotational springs 
  • Horizontal springs 
  • Bounding analysis 
  • Fixed-base and flexible-base conditions 
  • Examples 


Foundation Damping 

  • Requirements 
  • Effective damping ratio 
  • Soil damping 
  • Radiation damping 
  • Limitations and Issues 


Basement modeling  

  • Comparison of different models 
  • Models for buildings on relatively level grade 
  • Models for buildings on sloping ground
  • Examples 


Conclusions and Recommendations 

  • Helpful resources 
  • Comparison of current provisions 


Webinar Instructions
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.

Webinars are presented via GoToWebinar, an easy-to-use application that can be run on most systems and tablets. Instructions and login information will be provided in an email sent close to the date of the webinar. It is highly recommended that you download, install and test the application before the webinar begins by clicking on the link in the email.

GoToWebinar App requirements:
Windows 7 – 10 or Mac OSX Mavericks (10.9) – macOS Catalina (10.15)

Web Browser:
The two most recent version of the following browsers:
Google Chrome, Mozilla Firefox, Apple Safari, Microsoft Edge
Internet Explorer v11 (or later) with Flash enabled

Internet connection: Minimum of 1Mbps       Hardware: 2GB RAM or more

For more information, visit the Support section at


Professional Engineers:
6.0 PDHs

6.0 HSW CE Hours

6.0 LU|HSW

International Code Council:
.6 CEUs (Building)


Continuing Education Credit Information

This webinar is open to the public and is designed to qualify for 6.0 PDHs for professional engineers and 6.0 HSW continuing education hours for licensed 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 6.0 LU|HSW (Sponsor No. J885). Only full participation is reportable to the AIA/CES.

The International Code Council has approved this event for .6 CEUs in the specialty area of Building (Preferred Provider No. 1232).

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). 

On-Demand Credits
The preceding credit information only applies to the live presentation. This course in an on-demand format may not be eligible for the same credits as the live presentation; please consult your licensing board(s) to ensure that a structured, asynchronous learning format is appropriate. The following pre-approvals may be available for the on-demand format upon request:

6.0 HSW LUs (AIA)


Jorge F. Meneses, Ph.D. P.E. G.E. D.GE. F.ASCE

Principal Geotechnical Engineer at RMA Group, Inc.

Dr. Jorge Meneses is principal geotechnical engineer with RMA Group. He was a member of the California Seismic Safety Commission appointed by Governor Brown and confirmed by State Senate (2017-2021). He is a reviewer of seismic ground motions for the seismic design of high rise buildings for the City of San Diego, part-time faculty at San Diego State University, Fellow of the American Society of Civil Engineers (ASCE), member of the Industry Advisory Board of the Department of Structural Engineering at University of California San Diego, member of the Board of Directors of the Earthquake Engineering Research Institute (EERI), President of the EERI San Diego Chapter, past member of the ASCE 7-16 Committee (Minimum Design Loads for Buildings and Other Structures); member of the ASCE 1 Committee (Geotechnical Analysis, Design, Construction, Inspection and Monitoring of Nuclear Safety-Related Structures); Honorary chair of the ASCE Geo-Institute San Diego Chapter; and member of the Academy of Geo-Professionals.

AIA Info

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 ( 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: Soil-Structure Interaction (SSI)

Delivery Method: Live Online

Course Description: This six-hour course explains the principles and importance of soil-structure interaction (SSI), how to use base slab averaging, how to calculate embedment depths, the concepts of soil flexibility and foundation damping, and basement design for structures on level ground and on sloping ground.

Learning Objectives:

Learning Objective 1:
Learners will be able to utilize base slab averaging (BSA) as a method of constructing a level and flat concrete slab, determine when its application is necessary, and calculate embedment depths.

Learning Objective 2:
Learners will be able to review soil properties for flexibility calculations and discuss the soil compressibility modeling concept of vertical, horizontal and rotational springs.

Learning Objective 3:
Learners will be able to achieve effective foundation damping through an understanding of the requirements, damping ratio, soil damping, radiation damping, and related limitations and issues.

Learning Objective 4:
Learners will be able to review and compare different types and models of basements for buildings on sloping ground and for buildings on relatively level ground.

LUs: 6.0                                                                                              LU Type: LU|HSWs.

Prerequisites: Experience with foundation design

Advance Preparation: None

Program Level: Intermediate

Course Expiration Date: 05/19/2026

Complaint Resolution Policy:

Complaints regarding this course can be emailed to 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.

Streamable MP4/PDF Price: $329.00


Before undertaking any on-demand effort, you should review the rules of your licensing/certifying entity. It’s your responsibility to determine whether or not this on-demand course meets your continuing education requirements.

You must take and pass a quiz in order to receive credit. You can take the quiz as many times as needed and there is no time limit on the quiz. Once the quiz is completed, you will be asked to download your certificate.

Videos that qualify for AIA, LACES, ASLA, or CLARB credit will require an extra week for processing.

Streamable MP4/PDF

Available approximately 1 week after the date of the live event or the date of your order, whichever is later.

To track your purchase you will need to create an account on the website using the email address used for your registration.

The video will have occasional question prompts that will not allow the video to progress unless they are answered. You will not be able to skip forward while watching the video.

If you attempt to resume watching the video on a separate device, your progress will not be saved.

Click the link which appears at the end of the video to be taken to the course quiz.


HalfMoon will mail these materials via USPS. Please allow 2 weeks from the date of purchase to receive your product. If the live seminar is in the future, please allow 5 weeks from the date of the live seminar.

The link to the quiz will be available in a PDF in your USB drive marked QUIZ.

HalfMoon will contact you and issue a full refund if the product you ordered is not available. However, refunds will not be issued if completion certificates are requested.

Please contact HalfMoon Education if you have any questions during the process of taking this course. (715) 835-5900 or