Executive Summary: Structural Inspection Interview
 

Participants:

• Ron Duplessis (Host, representing the property/community at rescue7300.com)

• Michael Gertler (Structural Engineer, Gertler Brothers Consulting)

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Overview:

This interview discusses a preliminary site walkthrough of a boathouse/coastal facility along the Lake Pontchartrain area. Michael Gertler outlines structural concerns regarding the building’s foundation, pilings, and concrete elements, emphasizing that structural repairs must precede any major renovation project (such as a planned $4 million reconstruction).

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Key Topics & Findings

1. Structural Inspector Background & Mandates

• Experience: Gertler Brothers Consulting specializes in structural evaluation and repair of timber piles and coastal structures around New Orleans and the Municipal Yacht Harbor, including post-hurricane assessments (e.g., Katrina, Ida).

• Local Regulations: Regulations since Hurricane Katrina require boathouse owners to inspect and repair structural piles (using commercial divers for underwater inspection) before taking possession or starting construction additions.

• Insurance Baseline: Documenting current structural conditions creates a necessary baseline for future flood insurance claims following severe weather events.

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2. Walkthrough Observations & Structural Concerns

• Upper Balcony & Moisture Intrusion:

• Water is pooling/rolling back against the concrete.

• Internal steel reinforcement (rebar) is being exposed to moisture, causing rust, expansion, and subsequent concrete cracking/loss of tensile strength.

• Differential Settlement (Lower Level / Parking Area):

• Cracks run across the building where the structure transitions from ground support to water support.

• The water-supported portion appears to be settling differentially compared to the land-supported foundation.

• Soil Erosion & Sewage Leaks:

• A past sewer pipe leak eroded underground soil ("mud"), leaving voids beneath the slab.

• Soil loss deprives piles of lateral support and accelerates rot by allowing water infiltration.

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3. Recommendations & Construction Sequencing

A. Proper Project Sequencing

• Prioritize Underpinnings: Gertler strongly advises against spending $4 million on cosmetic or upper-structure renovations without first fixing the foundation and pilings.

• Risk Avoidance: Investing in superstructure improvements before stabilizing the foundation risks losing that capital if active movement or pile failure occurs.

B. Engineering Solutions

1. Pile Protection & Remediation:

• Timber piles primarily retain creosote on their outer perimeter; wave action and wet/dry cycles strip creosote at the waterline, leading to rot and vulnerability to storm debris impact.

• Solutions: Installing concrete or fiberglass protective sleeves around affected piles to stop wave-induced decay.

1. Concrete Repair:

• Investigate whether cracks penetrate full-depth and put steel rebar at risk.

• Utilize pressure-injected epoxy grout to seal concrete cracks and halt water intrusion.

1. Stabilization & Leveling:

• Conduct detailed inspections to determine if the building is actively moving.

• If necessary, utilize hydraulic jacking systems to partially re-level the building and insert shims to halt ongoing movement.

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Action Items & Deliverables

1. Detailed Inspection: Perform a comprehensive inspection of the entire foundation, including underwater commercial diver evaluation of all piles, upper balconies, and lower parking slabs.

2. Formal Proposal: Gertler Brothers Consulting will issue a written proposal outlining:

• Scope of work and documentation standards.

• Detailed findings on pile and concrete conditions.

• Specific repair methods and recommended solutions.

• Potential cost ranges for the structural repairs.