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Presenter: Scott J. DiFiore, P.E. and 2 more

Seminar Date:

Seminar Location: South Portland, ME

Doubletree by Hilton
363 Maine Mall Road
South Portland, ME 04106
Phone: 207-775-6161

This seminar is closed or full.


Registration:                        8:00 - 8:30 am

Morning Session:                8:30 - 11:45 am

Lunch (On your own):         11:45 am - 12:45 pm

Afternoon Session:             12:45 - 4:00 pm

How Soil Behavior Affects Structural Performance 
Scott DiFiore

   Cohesionless soilsCohesive soilsUnsuitable and problematic soils

Behavior of Retaining Walls 
Steve Keppel

   Wall types and behavior 
   Design considerations and lateral earth pressures water
   Management and drainage systems
   Common problems and failures

Tools of the Trade – Investigation Methods 
Scott DiFiore

   Subsurface explorations
   Non-destructive test methods for various materials

Foundation and Retaining Wall Repairs 
Giuliana Zelada

   Underpinning options
   Slab repair options
   Wall repair options
   Means and methods
   Failure examples with case studies

Shallow Foundations and Slabs-On-Grade 
Steve Keppel

  Design considerations
   Typical construction
   Common problems and failures

How Construction Affects Adjacent Buildings 
and How to Minimize Damage 
Giuliana Zelada

   Lateral movement and settlement
   Preconstruction surveys/condition assessments

Credit Information:

Who Should Attend

  • Architects
  • Engineers
  • Contractors

Professional Engineers
     6.0 PDHs

     6.0 HSW Continuing Ed. Hours
     6.0 AIA LU|HSW

     Non-Credit Continuing Ed.

Continuing Education Credit Information

This seminar is open to the public and offers 6.0 PDHs to professional engineers and 6.0 HSW continuing education hours to architects in all states, including Maine. Educators and courses are not subject to preapproval in Maine.

The American Institute of Architects has approved this event for 6.0 LU|HSW (Sponsor No. J885). Only full attendance can be reported to the AIA/CES. Visit www.halfmoonseminars.org for complete AIA information under this course listing.

HalfMoon Education is an approved continuing education sponsor for engineers in Florida, Indiana (License No. CE21700059), Maryland, New Jersey (Approval No. 24GP00000700), North Carolina, and North Dakota. HalfMoon Education is deemed an approved continuing education sponsor for New York engineers and architects.

This seminar offers a non-credit continuing education opportunity to contractors. It is not approved by any state contractor licensing entity.

Attendance will be monitored, and attendance certificates will be available after the seminar for most individuals who complete the entire event. Attendance certificates not available at the seminar will be mailed to participants within fifteen business days.


Scott J. DiFiore, P.E.

Principal at Simpson Gumpertz & Heger Inc.

Mr. DiFiore joined SGH in 2005. He has over 20 yrs of experience designing, investigating, and rehabilitating a variety of structures. He holds degrees in both Geotechnical and Structural Engineering, and he combines that knowledge to solve complex problems related to below-grade construction, including retaining walls, excavation-support systems, underpinning systems, and foundations. Mr. DiFiore has taught classes in Applied Mechanics at Tufts University, and he is a member of the Geotechnical Advisory Committee for the Massachusetts Board of Building Regulations and Standards (BBRS). Mr. DiFiore is a registered professional engineer in Massachusetts and several other states. He can be reached at sjdifiore@sgh.com.

Steven F. Keppel, P.E.

Senior Consulting Engineer – Structures at Simpson Gumpertz & Heger Inc.

Mr. Keppel joined SGH in 2006. He has diverse experience in civil, geotechnical, and structural engineering, including investigating, designing, and rehabilitating a variety of structures. Mr. Keppel has participated in several investigations to determine causes of building settlement and retaining wall failures, and he has experience with structural and geotechnical monitoring and instrumentation. Mr. Keppel is a registered professional engineer in Massachusetts. He can be reached at sfkeppel@sgh.com.

Giuliana A. Zelada-Tumialan, P.E.

Senior Project Manager at Simpson Gumpertz & Heger Inc.

Ms. Zelada-Tumialan joined SGH in 2003. Her area of expertise is in geotechnical engineering. She provides planning, design, and construction support services in the areas of shallow and deep foundation systems, earth-retention systems, and groundwater monitoring for residential, commercial, and industrial buildings, power stations, and substations. Ms. Zelada-Tumialan has also participated in multiple investigations to determine causes of building settlement, retaining wall failures, and slope failures, and she has provided litigation support for various projects. She is a registered professional engineer in Massachusetts and several other states. She can be reached at gazelada@sgh.com.

Tuition Costs:

Standard Tuition: $289.00
Online Tuition (pre-registration): $289.00
Group Prices
3 or more People: $269.00

Each registration includes one copy of a manual prepared by the seminar speakers.

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 (cesupport@aia.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: Evaluating and Rehabilitating Foundations and Retaining Walls.

Delivery Method: Live

Course Description: This 6.0 hour live lecture presentation examines how soil behavior affects structural performance, common problems with shallow foundations, slabs-on-grade, and retaining walls, investigation methods to diagnosis problems and causes, the impact of nearby construction on existing foundations, and repair techniques for the type and cause of damage to various types of foundations.

Learning Objectives:

Learning Objective 1:
Learners will be able to explain how soil conditions can affect structural performance and how subsurface explorations methods and non-destructive test methods can diagnose the causes of foundation damage.

Learning Objective 2:
Learners will be able to identify common shallow foundation, slabs-on-grade and retaining wall problem causes and design considerations and methods to determine causation.

Learning Objective 3:
Learners will be able to identify and describe foundation and retaining wall repair methods based on the diagnosis of the problem and its causes.

Learning Objective 4:
Learners will be able to explain how foundations can be damaged by construction activities at nearby sites and how the activity and damage can be monitored.

LUs: 6.0                                                                                              LU Type: LU|HSWs.

Prerequisites: Experience with foundation design and construction.

Advance Preparation: None

Program Level: Intermediate

Course Expiration Date: 05/13/2022

Complaint Resolution Policy:

Complaints regarding this course can be emailed to doug@halfmoonseminars.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.