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INSTRUCTORS:
A. Chase Anderson, P.E., M.ASCE
Sean R. Long, P.E.
Byoung-Jun Lee, Ph.D, P.E., S.E.
Akshay Beniwal, P.E.
Karim Kazemi Bidokhti, Ph.D, P.E.
Nick Cramsey, P.E.
Course Length: 1.5 hour
These presentations were recorded at the 2024 Forensic Engineering Congress.
Purpose and Background
Evaluating Structural Damage to Wood-Framed Structures from Long-Term Deterioration: Determining Repair vs. Replacement Scope (16 minutes)
This presentation explores the assessment and repair of wood-framed structures impacted by long-term moisture damage, biological growth, and insect activity. It emphasizes visual and non-destructive evaluations, as well as strategic sampling methods to quantify damage in large, complex buildings. Using ASCE standards (ASCE 11: Guideline for Structural Condition Assessment of Existing Buildings and also ASCE 30: Guideline for Condition Assessment of the Building Envelope) the presentation outlines how to determine the extent of structural repair versus replacement, integrating methods like moisture content readings, visual assessments, and probing tests. A case study involving a moisture-damaged hotel is also discussed and illustrates practical approaches to creating repair protocols for wood-framed systems.
Column Removal of Arch Roof Truss Framing Structure (14 minutes)
This case study examines the structural challenges of removing interior and exterior columns in a 1970s warehouse with arch truss framing. The project required detailed condition surveys, structural analysis, and shoring design due to the absence of construction drawings. The presentation highlights the design solutions implemented to address asymmetric torsional forces and retrofit the structure with new footings, beams, and box gutter systems. The study underscores the complexities of structural modifications, including retrofitting existing members to comply with current codes.
Partial Reclad of a Mid-Atlantic Mid-Rise (24 minutes)
This presentation details the investigation and repair of a contemporary mid-rise building following the failure of aluminum composite material (ACM) cladding panels. It outlines key issues in the original construction, including non-engaged attachments and improper installation of pressure-sensitive tapes. The repair involved removing and replacing defective panels and supports while preserving parts of the curtain wall system. The presentation provides insights into material testing, design modifications, and the cost considerations of recladding, which totaled approximately $80 per square foot.
Assessment, Analysis, and Repair of Precast Hollow Core Planks (22 minutes)
This presentation addresses the assessment and repair of deteriorated precast hollow core planks, which are vulnerable to moisture and chloride exposure. It explains the evaluation process for flexural and shear capacities, emphasizing the importance of detailed investigations and soundings to document damage. The repair strategies range from conventional concrete repairs for minor edge deterioration to partial plank replacements for severe end damage. Case studies illustrate cost-effective repairs, which reduced costs by 70-80% compared to full replacements, and stress the integration of waterproofing systems for long-term durability.
Benefits and Learning Outcomes
Upon completion of these sessions, you will be able to:
- Explain the methods used to assess structural damage in wood-framed buildings, including visual inspections, moisture content readings, and sampling techniques, and how these are applied to determine repair or replacement scopes.
- Analyze the challenges associated with removing columns in arch truss framing, including the structural impacts of asymmetry, torsional forces, and retrofitting techniques to ensure stability.
- Identify the causes of cladding panel failure, including improper installation techniques, and describe the steps involved in recladding a mid-rise building while preserving parts of the existing curtain wall system.
- Define the evaluation process for determining the structural integrity of precast hollow core planks, and list repair strategies tailored to address varying levels of deterioration.
Assessment of Learning Outcomes
Learning outcomes are assessed and achieved through passing a 10 multiple choice question post-test with at least a 70%.
Who Should Attend?
- Architects
- Construction Engineers
- Forensic engineers
- Geotechnical engineers
- Structural engineers
- Transportation engineers
How to Earn your PDHs and Receive Your Certificate of Completion
This course is worth 1.5 PDHs. To receive your certificate of completion, you will need to complete a short on-line post-test and receive a passing score of 70% or higher within 365 days of the course purchase.
How do I convert CEUs to PDHs?
1.0 CEU = 10 PDHs [Example: 0.1 CEU = 1 PDH]