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Foundation Friday: Case Study: Lally Column Installation In Groton, CT


Front view of Morse Avenue, Groton, CT, a charming 4-bed, 4-bath multi-family home with green siding, a well-maintained lawn, and mature trees.
Photo Courtesy Of Google Street View - Taken September 2013

This project involved the installation of six lally columns with footings to reinforce the foundation of a multi-family home. This initiative aimed to provide structural stability, address potential weak points in the seams, and ensure long-term safety for the property.


Overview

  • Location: Groton, CT 06340

  • Project Type: This property is a 4-bedroom, 4-bathroom, 2,587 sq. ft. multi-family home built in 1914.

  • Scope: Install six lally columns (three on each side of the foundation) with reinforced footings, ensuring proper placement along structural seams.


    A person pointing at the placement of temporary hollow jack posts in a cluttered basement, emphasizing areas needing reinforcement.
    The starting point: existing temporary hollow jack posts in the basement. Time to reinforce and stabilize for long-term security!

Challenges & Objectives of the Current Lally Column Set-up

Challenges:

  1. Seam Vulnerabilities:

    • Identifying and addressing weak seams in the foundation's middle and right side.

    • Ensuring proper alignment and load distribution along the seams to eliminate structural risks.

  2. Balanced Support:

    • Achieving even load distribution by strategically placing three lally columns on each side of the structure.

  3. Precision Installation:

    • Excavating, preparing, and securing the footings with exact measurements to meet code and structural standards.


Objectives:

  • Reinforce the foundation to improve long-term structural stability.

  • Eliminate potential weak points by aligning lally columns at critical seams.

  • Provide a durable solution to ensure the safety of residents in the multi-family home.

Execution

Site Assessment:

  • Conducted an on-site evaluation to identify load-bearing points and locate seams, particularly focusing on the middle and right side of the foundation.

Preparation:

  • Excavated six footing locations and prepared them for reinforced concrete.

  • Verified footing dimensions met building code requirements.

Installation:

  • Installed three lally columns on each side of the foundation.

  • Strategically placed lally columns at seams in the middle of the structure for optimal support.

  • Conducted an additional check on the right side for any overlooked seams to ensure comprehensive coverage.


    Excavation work in progress with dug-out holes for new column footings. Buckets filled with removed rocks and debris sit nearby, highlighting the preparation phase.
    Progress in action! Footings are being prepared for inspection prior to being poured where the new lally column will ensure a strong and stable foundation for this multi-family home.

Final Quality Check:

  • City of Groton, CT building inspector approved all six lally columns and footings for alignment, load distribution, and adherence to safety and building codes.

Results

The successful installation of six lally columns with reinforced footings provided enhanced structural stability for the multi-family property. By addressing potential weak points in the foundation’s seams, the project ensured the long-term safety and durability of the building.


Basement featuring an installed lally column secured with a concrete footing, surrounded by tools, pipes, and storage items.
A job well-done! A newly installed lally column with concrete and reinforced with rebars to enhance the structural stability of this property.

Conclusion

This project demonstrates the importance of customized foundation reinforcement solutions for multi-family homes. The team’s attention to detail and commitment to quality delivered a robust and reliable outcome for the residents of this property in Groton, Ct.


Have concerns about your foundation? Contact us today for a professional evaluation and tailored solutions!

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