Concrete ADA Compliance: Boston YMCA Pool Deck Renovation Case Study

Concrete ADA Compliance: Ramp Construction & Structural Upgrades

When renovating public facilities, concrete ADA compliance isn’t optional — it’s essential. Accessibility is not simply about convenience; it is about safety, inclusion, and meeting federal requirements that protect both the public and the facility owner.

During renovations at the Boston YMCA, a seemingly straightforward locker room upgrade revealed a complex structural and accessibility challenge. What began as a renovation project quickly turned into a necessary ADA concrete compliance correction involving elevation changes, structural underpinning, and the construction of a monolithic concrete ramp system.

Here’s how Dechaine Concrete delivered a long-term, structurally sound ADA solution.

The Project Background

The Boston YMCA, a major public facility in Massachusetts, was undergoing renovations to its girls locker room. As is common in older Massachusetts public facility renovations, improvements to one area uncovered complications in adjacent spaces .Attached directly to the locker room was a community swimming pool deck — a heavily used public space.

The general contractor overseeing the renovation referred Dechaine Concrete to the project after identifying a significant accessibility concern. The team received the initial call through GenServ, and coordination began with the Project Manager and Director of Construction responsible for the overall renovation.

Like many public building upgrades, this wasn’t just about updating finishes. It was about bringing an existing structure up to modern accessibility standards — safely and permanently.

The Problem: Elevation and ADA Compliance

The locker room and pool deck were built at different elevations, creating a height difference of approximately 1.4 feet.

The original design solution was a staircase connecting the two spaces. While functional, it was not ADA compliant. In a public facility like the YMCA, an accessible route between these spaces is required under the Americans with Disabilities Act.

Simply adding a temporary ramp or surface modification wasn’t viable. The elevation difference and structural configuration demanded a more comprehensive solution.

This was not a cosmetic issue — it was a structural one.

To properly correct the accessibility problem, the existing slab and landing configuration would need to be modified, which introduced a new challenge: structural stability.

Step One: Removing the Existing Elevation Barrier

To create a compliant transition, the team first removed the top landing, which sat approximately 1.4 feet higher than the adjacent pool deck.

Next, the concrete slab in the locker room and upper stairway area was cut and removed. The goal was to bring the surfaces to a flush elevation that could properly accommodate an ADA-compliant landing and ramp system.

However, cutting and removing slab sections revealed a serious structural issue.

Once the slab was removed, a CMU (concrete masonry unit) wall that had previously been supported by the slab was left partially unsupported — essentially “floating.” Without corrective action, the integrity of the wall and surrounding structure could have been compromised.

At this stage, the project shifted from simple demolition and replacement to a structural stabilization effort.

Step Two: Underpinning to Stabilize the Structure

Underpinning became the critical component of the project.

Underpinning is a specialized process used to strengthen and stabilize existing foundations and structural elements when original support conditions are altered. In this case, the slab removal eliminated the wall’s previous support system.

Dechaine Concrete carefully underpinned the existing slab and CMU wall to restore and reinforce structural integrity.

The process involved:

• Forming beneath the existing wall in controlled sections

• Pouring concrete incrementally to avoid destabilizing the structure

• Ensuring proper bonding and load transfer

• Creating a new stable base to receive future structural elements

By pouring the wall support in sections, the team ensured the structure remained stable throughout the process. This phased approach minimized risk and maintained safety within the active renovation site.

The underpinning accomplished two critical goals:

1. It permanently stabilized the existing wall and slab system.

2. It created a reinforced structural base capable of supporting the new ADA ramp and landing.

Without proper underpinning, any ramp addition would have been compromised from the start.

Step Three: Constructing the ADA-Compliant Ramp System

With the structure stabilized, the focus shifted to constructing the new ADA-compliant transition between the locker room and pool deck.

Creating a Flush Landing

A new lower slab was constructed at the same height as the pool deck. This created a proper ADA landing area — a requirement for compliant ramp systems.

Ensuring the landing elevation matched the pool deck was essential to eliminate tripping hazards and provide seamless accessibility.

Building the Receiving Wall

To properly anchor the ramp, Dechaine constructed a new concrete wall on the right side of the modified space. This wall was designed to receive and structurally integrate with the ramp.

Monolithic Ramp Construction

The concrete ramp was then pinned into the newly constructed wall, creating a monolithic structure.

A monolithic pour ensures that the ramp and supporting wall act as a single structural unit rather than separate pieces. This increases durability, strength, and long-term performance — especially important in high-traffic, moisture-prone environments like pool facilities.

The ramp was built to meet ADA slope requirements, ensuring safe and compliant access between the locker room and pool deck.

Finally, the pool deck was made flush with the ramp, creating a seamless transition between spaces.

The Result: Safe, Durable, ADA-Compliant Access

The completed project transformed a non-compliant staircase into a fully accessible, structurally integrated concrete ramp system.

Key outcomes included:

• Corrected elevation difference

• Stabilized existing CMU wall through underpinning

• Constructed flush landing at pool deck height

• Installed monolithic concrete ramp

• Achieved ADA compliance for a public facility

Most importantly, the solution was permanent — not a patch or surface-level fix.

Why ADA Concrete Corrections Require Structural Expertise

Many ADA corrections in older buildings reveal hidden structural challenges. Elevation conflicts, unsupported walls, and slab dependencies are common in facilities that were built before modern accessibility standards.

Attempting surface-level modifications without evaluating the structural implications can lead to:

• Cracking or settlement

• Wall instability

• Drainage issues

• Future liability concerns

Proper ADA compliance in concrete structures often requires:

• Slab removal and reconstruction

• Underpinning of existing foundations

• Structural wall integration

• Monolithic ramp construction

• Precise slope and landing calculations

This project at the Boston, Massachusetts YMCA demonstrates that accessibility upgrades are not always simple add-ons. They can require deep structural knowledge and experienced concrete execution.

Concrete ADA Compliance for Existing Structures

For facility managers, property owners, and general contractors, ADA compliance during renovation should be proactive — not reactive.

Existing concrete structures frequently need:

• ADA existing concrete correction

• Elevation adjustments

• Structural slab modification

• Ramp construction tied into existing foundations

• Underpinning support for altered load paths

  
  

When handled correctly, these upgrades enhance both safety and longevity.

When handled incorrectly, they can create structural and legal risks.

Make Sure Your Concrete Structures Are ADA Compliant

The Boston YMCA renovation is a strong example of how structural expertise and ADA compliance go hand in hand.

Dechaine Concrete specializes in commercial concrete services and can assit your organization with:

• Concrete ADA compliance correction

• Structural slab removal and replacement

• Underpinning and foundation stabilization

• Monolithic concrete ramp construction

• Elevation conflict resolution in renovation projects

If you are renovating a public or commercial facility, now is the time to ensure your concrete structures are ADA compliant — safely, efficiently, and permanently.

Accessibility should never be an afterthought, especially in Boston-area public facilities. With the right structural approach, concrete ADA compliance can be achieved with confidence, delivering safe, durable access solutions for Massachusetts public facility renovations.

Frequently Asked Questions: ADA-Compliant Concrete Ramps 

What makes a concrete ramp ADA compliant?

(Per the Access Board’s ADA guide to Chapter 4: Ramps and Curb Ramps)

A concrete ramp must meet the federal ADA technical criteria for accessible routes and ramp features. Key federal requirements include:

Slope & Location

• Running slope no steeper than 1:12 (8.33 %) — i.e., 1″ vertical rise for every 12″ of horizontal run.

• Portions of accessible routes with slopes steeper than 5 % are treated as ramps.

• If space is limited in alterations or existing facilities, steeper slopes up to 1:10 (6″ rise) or 1:8 (3″ rise) may be permitted only in limited rise ramp segments.

Width & Clearances

• Clear width at least 36 inches measured between handrails (if handrails are provided).

Landings

• Level landings at the top and bottom of each run with no grade break steeper than 1:48 within the landing area.

• Intermediate landings (especially where direction changes) must be at least 60″ by 60″ clear.

Handrails

• Required on both sides when the ramp has a rise greater than 6 inches.

• Handrails must be continuous and provide gripping surfaces and proper extensions at top/bottom of runs.

Surface & Edge Protection

• Surface must be firm, stable, and slip‑resistant (concrete typically qualifies).

• Edge protection (curbs, barriers, or extended surfaces) must prevent wheelchair casters or crutch tips from slipping off the ramp.

Cross Slope & Drainage

• Cross slope (side‑to‑side slope) of ramp runs and landings must not exceed 1:48.

• Landings subject to wet conditions must be designed to prevent water accumulation.

These requirements are federal minimums; local building codes (e.g., IBC/ICC A117.1) may add stricter criteria.

When is underpinning required for ADA upgrades?

Underpinning (deepening or strengthening the foundation of an existing structure) is not specifically “triggered” by the ADA itself — but it may become necessary in a few situations:

Structural Impracticability / Technical Infeasibility

• When existing conditions prevent meeting ADA technical requirements in the scope of an alteration, compliance to the maximum extent feasible is required. If meeting the standards would require removal/alteration of essential structural members, that situation is considered technically infeasible. In that case, you must comply as fully as feasible without altering essential structure.

Alterations Affecting Usability

• If alterations affect or move primary functional areas (entrances, public routes), you must upgrade accessible features along the path of travel unless doing so is disproportionate to the overall project or technically infeasible under ADA definitions.

In Practical Terms:

• Underpinning could be required only if the ramp or accessible route sits on or near a structural system (foundation, slab, retaining wall, areaway, bridge deck, etc.) and meeting ADA grades/slope necessitates changing existing structural supports. This is an engineering determination, not something the ADA “requires” by rule.

Summary: ADA doesn’t mandate underpinning per se — it mandates accessibility unless doing so is technically infeasible. If underpinning is the only way to provide full ADA compliance, then it may be required as part of an alteration; conversely, if it would threaten structural stability, documentation of infeasibility may allow maximum feasible compliance.

Can existing concrete structures be modified for ADA compliance?

Yes. The ADA standards explicitly allow modification of existing elements to achieve accessibility, provided it complies with federal requirements and definitions.

Alterations Must Comply

When a modification or renovation affects an existing element (like a ramp, walk, or entrance), that element must be brought into compliance with applicable ADA standards as part of an alteration project.

• For example, replacing an existing non‑compliant concrete ramp or adjusting a sidewalk slope qualifies as an ADA alteration and must meet current ADA design requirements for accessible routes (slopes, landings, widths).

Path of Travel to Primary Function

If the alteration affects an area containing a primary function (major activity for which the building is intended), then the accessible path of travel to that area (ramps, entrances, restrooms, etc.) must be made accessible within the scope of the work, unless doing so is disproportionate to the cost of the overall alteration (typically >20% of alteration cost).

Maximum Extent Feasible

Where full ADA technical compliance cannot be achieved due to physical constraints, modifications must still be made to the maximum extent feasible under ADA alteration requirements.

Summary:

• Yes, existing concrete structures can be modified — and frequently must be — to reach ADA slope/clearance/route standards when altered.

• The modifications must meet ADA standards unless proven technically infeasible; even then, accessibility must be maximized.